3384 lines
98 KiB
C
3384 lines
98 KiB
C
/* Target-vector operations for controlling windows child processes, for GDB.
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Copyright (C) 1995-2019 Free Software Foundation, Inc.
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Contributed by Cygnus Solutions, A Red Hat Company.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Originally by Steve Chamberlain, sac@cygnus.com */
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#include "defs.h"
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#include "frame.h" /* required by inferior.h */
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#include "inferior.h"
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#include "infrun.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "command.h"
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#include "completer.h"
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#include "regcache.h"
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#include "top.h"
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#include <signal.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <windows.h>
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#include <imagehlp.h>
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#include <psapi.h>
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#ifdef __CYGWIN__
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#include <wchar.h>
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#include <sys/cygwin.h>
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#include <cygwin/version.h>
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#endif
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#include <algorithm>
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#include "buildsym-legacy.h"
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#include "filenames.h"
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#include "symfile.h"
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#include "objfiles.h"
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#include "gdb_bfd.h"
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#include "gdb_obstack.h"
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#include "gdbthread.h"
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#include "gdbcmd.h"
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#include <unistd.h>
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#include "exec.h"
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#include "solist.h"
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#include "solib.h"
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#include "xml-support.h"
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#include "inttypes.h"
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#include "i386-tdep.h"
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#include "i387-tdep.h"
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#include "windows-tdep.h"
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#include "windows-nat.h"
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#include "x86-nat.h"
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#include "complaints.h"
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#include "inf-child.h"
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#include "common/gdb_tilde_expand.h"
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#include "common/pathstuff.h"
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#define AdjustTokenPrivileges dyn_AdjustTokenPrivileges
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#define DebugActiveProcessStop dyn_DebugActiveProcessStop
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#define DebugBreakProcess dyn_DebugBreakProcess
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#define DebugSetProcessKillOnExit dyn_DebugSetProcessKillOnExit
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#define EnumProcessModules dyn_EnumProcessModules
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#define GetModuleInformation dyn_GetModuleInformation
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#define LookupPrivilegeValueA dyn_LookupPrivilegeValueA
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#define OpenProcessToken dyn_OpenProcessToken
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#define GetConsoleFontSize dyn_GetConsoleFontSize
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#define GetCurrentConsoleFont dyn_GetCurrentConsoleFont
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typedef BOOL WINAPI (AdjustTokenPrivileges_ftype) (HANDLE, BOOL,
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PTOKEN_PRIVILEGES,
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DWORD, PTOKEN_PRIVILEGES,
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PDWORD);
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static AdjustTokenPrivileges_ftype *AdjustTokenPrivileges;
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typedef BOOL WINAPI (DebugActiveProcessStop_ftype) (DWORD);
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static DebugActiveProcessStop_ftype *DebugActiveProcessStop;
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typedef BOOL WINAPI (DebugBreakProcess_ftype) (HANDLE);
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static DebugBreakProcess_ftype *DebugBreakProcess;
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typedef BOOL WINAPI (DebugSetProcessKillOnExit_ftype) (BOOL);
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static DebugSetProcessKillOnExit_ftype *DebugSetProcessKillOnExit;
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typedef BOOL WINAPI (EnumProcessModules_ftype) (HANDLE, HMODULE *, DWORD,
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LPDWORD);
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static EnumProcessModules_ftype *EnumProcessModules;
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typedef BOOL WINAPI (GetModuleInformation_ftype) (HANDLE, HMODULE,
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LPMODULEINFO, DWORD);
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static GetModuleInformation_ftype *GetModuleInformation;
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typedef BOOL WINAPI (LookupPrivilegeValueA_ftype) (LPCSTR, LPCSTR, PLUID);
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static LookupPrivilegeValueA_ftype *LookupPrivilegeValueA;
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typedef BOOL WINAPI (OpenProcessToken_ftype) (HANDLE, DWORD, PHANDLE);
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static OpenProcessToken_ftype *OpenProcessToken;
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typedef BOOL WINAPI (GetCurrentConsoleFont_ftype) (HANDLE, BOOL,
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CONSOLE_FONT_INFO *);
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static GetCurrentConsoleFont_ftype *GetCurrentConsoleFont;
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typedef COORD WINAPI (GetConsoleFontSize_ftype) (HANDLE, DWORD);
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static GetConsoleFontSize_ftype *GetConsoleFontSize;
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#undef STARTUPINFO
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#undef CreateProcess
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#undef GetModuleFileNameEx
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#ifndef __CYGWIN__
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# define __PMAX (MAX_PATH + 1)
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typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE, LPSTR, DWORD);
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static GetModuleFileNameEx_ftype *GetModuleFileNameEx;
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# define STARTUPINFO STARTUPINFOA
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# define CreateProcess CreateProcessA
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# define GetModuleFileNameEx_name "GetModuleFileNameExA"
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# define bad_GetModuleFileNameEx bad_GetModuleFileNameExA
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#else
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# define __PMAX PATH_MAX
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/* The starting and ending address of the cygwin1.dll text segment. */
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static CORE_ADDR cygwin_load_start;
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static CORE_ADDR cygwin_load_end;
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# define __USEWIDE
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typedef wchar_t cygwin_buf_t;
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typedef DWORD WINAPI (GetModuleFileNameEx_ftype) (HANDLE, HMODULE,
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LPWSTR, DWORD);
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static GetModuleFileNameEx_ftype *GetModuleFileNameEx;
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# define STARTUPINFO STARTUPINFOW
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# define CreateProcess CreateProcessW
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# define GetModuleFileNameEx_name "GetModuleFileNameExW"
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# define bad_GetModuleFileNameEx bad_GetModuleFileNameExW
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#endif
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static int have_saved_context; /* True if we've saved context from a
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cygwin signal. */
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#ifdef __CYGWIN__
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static CONTEXT saved_context; /* Containes the saved context from a
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cygwin signal. */
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#endif
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/* If we're not using the old Cygwin header file set, define the
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following which never should have been in the generic Win32 API
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headers in the first place since they were our own invention... */
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#ifndef _GNU_H_WINDOWS_H
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enum
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{
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FLAG_TRACE_BIT = 0x100,
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};
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#endif
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#ifndef CONTEXT_EXTENDED_REGISTERS
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/* This macro is only defined on ia32. It only makes sense on this target,
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so define it as zero if not already defined. */
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#define CONTEXT_EXTENDED_REGISTERS 0
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#endif
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#define CONTEXT_DEBUGGER_DR CONTEXT_FULL | CONTEXT_FLOATING_POINT \
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| CONTEXT_SEGMENTS | CONTEXT_DEBUG_REGISTERS \
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| CONTEXT_EXTENDED_REGISTERS
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static uintptr_t dr[8];
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static int debug_registers_changed;
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static int debug_registers_used;
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static int windows_initialization_done;
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#define DR6_CLEAR_VALUE 0xffff0ff0
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/* The exception thrown by a program to tell the debugger the name of
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a thread. The exception record contains an ID of a thread and a
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name to give it. This exception has no documented name, but MSDN
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dubs it "MS_VC_EXCEPTION" in one code example. */
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#define MS_VC_EXCEPTION 0x406d1388
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typedef enum
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{
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HANDLE_EXCEPTION_UNHANDLED = 0,
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HANDLE_EXCEPTION_HANDLED,
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HANDLE_EXCEPTION_IGNORED
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} handle_exception_result;
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/* The string sent by cygwin when it processes a signal.
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FIXME: This should be in a cygwin include file. */
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#ifndef _CYGWIN_SIGNAL_STRING
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#define _CYGWIN_SIGNAL_STRING "cYgSiGw00f"
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#endif
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#define CHECK(x) check (x, __FILE__,__LINE__)
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#define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
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#define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
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#define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
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#define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
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static void cygwin_set_dr (int i, CORE_ADDR addr);
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static void cygwin_set_dr7 (unsigned long val);
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static CORE_ADDR cygwin_get_dr (int i);
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static unsigned long cygwin_get_dr6 (void);
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static unsigned long cygwin_get_dr7 (void);
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static enum gdb_signal last_sig = GDB_SIGNAL_0;
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/* Set if a signal was received from the debugged process. */
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/* Thread information structure used to track information that is
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not available in gdb's thread structure. */
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typedef struct windows_thread_info_struct
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{
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struct windows_thread_info_struct *next;
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DWORD id;
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HANDLE h;
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CORE_ADDR thread_local_base;
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char *name;
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int suspended;
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int reload_context;
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CONTEXT context;
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STACKFRAME sf;
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}
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windows_thread_info;
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static windows_thread_info thread_head;
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/* The process and thread handles for the above context. */
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static DEBUG_EVENT current_event; /* The current debug event from
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WaitForDebugEvent */
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static HANDLE current_process_handle; /* Currently executing process */
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static windows_thread_info *current_thread; /* Info on currently selected thread */
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static DWORD main_thread_id; /* Thread ID of the main thread */
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/* Counts of things. */
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static int exception_count = 0;
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static int event_count = 0;
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static int saw_create;
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static int open_process_used = 0;
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/* User options. */
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static int new_console = 0;
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#ifdef __CYGWIN__
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static int cygwin_exceptions = 0;
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#endif
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static int new_group = 1;
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static int debug_exec = 0; /* show execution */
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static int debug_events = 0; /* show events from kernel */
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static int debug_memory = 0; /* show target memory accesses */
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static int debug_exceptions = 0; /* show target exceptions */
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static int useshell = 0; /* use shell for subprocesses */
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/* This vector maps GDB's idea of a register's number into an offset
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in the windows exception context vector.
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It also contains the bit mask needed to load the register in question.
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The contents of this table can only be computed by the units
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that provide CPU-specific support for Windows native debugging.
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These units should set the table by calling
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windows_set_context_register_offsets.
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One day we could read a reg, we could inspect the context we
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already have loaded, if it doesn't have the bit set that we need,
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we read that set of registers in using GetThreadContext. If the
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context already contains what we need, we just unpack it. Then to
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write a register, first we have to ensure that the context contains
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the other regs of the group, and then we copy the info in and set
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out bit. */
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static const int *mappings;
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/* The function to use in order to determine whether a register is
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a segment register or not. */
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static segment_register_p_ftype *segment_register_p;
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/* See windows_nat_target::resume to understand why this is commented
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out. */
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#if 0
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/* This vector maps the target's idea of an exception (extracted
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from the DEBUG_EVENT structure) to GDB's idea. */
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struct xlate_exception
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{
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DWORD them;
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enum gdb_signal us;
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};
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static const struct xlate_exception xlate[] =
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{
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{EXCEPTION_ACCESS_VIOLATION, GDB_SIGNAL_SEGV},
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{STATUS_STACK_OVERFLOW, GDB_SIGNAL_SEGV},
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{EXCEPTION_BREAKPOINT, GDB_SIGNAL_TRAP},
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{DBG_CONTROL_C, GDB_SIGNAL_INT},
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{EXCEPTION_SINGLE_STEP, GDB_SIGNAL_TRAP},
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{STATUS_FLOAT_DIVIDE_BY_ZERO, GDB_SIGNAL_FPE}
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};
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#endif /* 0 */
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struct windows_nat_target final : public x86_nat_target<inf_child_target>
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{
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void close () override;
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void attach (const char *, int) override;
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bool attach_no_wait () override
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{ return true; }
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void detach (inferior *, int) override;
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void resume (ptid_t, int , enum gdb_signal) override;
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ptid_t wait (ptid_t, struct target_waitstatus *, int) override;
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void fetch_registers (struct regcache *, int) override;
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void store_registers (struct regcache *, int) override;
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enum target_xfer_status xfer_partial (enum target_object object,
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const char *annex,
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gdb_byte *readbuf,
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const gdb_byte *writebuf,
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ULONGEST offset, ULONGEST len,
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ULONGEST *xfered_len) override;
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void files_info () override;
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void kill () override;
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void create_inferior (const char *, const std::string &,
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char **, int) override;
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void mourn_inferior () override;
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bool thread_alive (ptid_t ptid) override;
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std::string pid_to_str (ptid_t) override;
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void interrupt () override;
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char *pid_to_exec_file (int pid) override;
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ptid_t get_ada_task_ptid (long lwp, long thread) override;
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bool get_tib_address (ptid_t ptid, CORE_ADDR *addr) override;
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const char *thread_name (struct thread_info *) override;
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};
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static windows_nat_target the_windows_nat_target;
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/* Set the MAPPINGS static global to OFFSETS.
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See the description of MAPPINGS for more details. */
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void
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windows_set_context_register_offsets (const int *offsets)
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{
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mappings = offsets;
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}
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/* See windows-nat.h. */
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void
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windows_set_segment_register_p (segment_register_p_ftype *fun)
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{
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segment_register_p = fun;
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}
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static void
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check (BOOL ok, const char *file, int line)
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{
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if (!ok)
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printf_filtered ("error return %s:%d was %u\n", file, line,
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(unsigned) GetLastError ());
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}
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/* Find a thread record given a thread id. If GET_CONTEXT is not 0,
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then also retrieve the context for this thread. If GET_CONTEXT is
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negative, then don't suspend the thread. */
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static windows_thread_info *
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thread_rec (DWORD id, int get_context)
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{
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windows_thread_info *th;
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for (th = &thread_head; (th = th->next) != NULL;)
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if (th->id == id)
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{
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if (!th->suspended && get_context)
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{
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if (get_context > 0 && id != current_event.dwThreadId)
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{
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if (SuspendThread (th->h) == (DWORD) -1)
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{
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DWORD err = GetLastError ();
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/* We get Access Denied (5) when trying to suspend
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threads that Windows started on behalf of the
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debuggee, usually when those threads are just
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about to exit.
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We can get Invalid Handle (6) if the main thread
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has exited. */
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if (err != ERROR_INVALID_HANDLE
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&& err != ERROR_ACCESS_DENIED)
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warning (_("SuspendThread (tid=0x%x) failed."
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" (winerr %u)"),
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(unsigned) id, (unsigned) err);
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th->suspended = -1;
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}
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else
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th->suspended = 1;
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}
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else if (get_context < 0)
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th->suspended = -1;
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th->reload_context = 1;
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}
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return th;
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}
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return NULL;
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}
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/* Add a thread to the thread list.
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PTID is the ptid of the thread to be added.
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H is its Windows handle.
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TLB is its thread local base.
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MAIN_THREAD_P should be true if the thread to be added is
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the main thread, false otherwise. */
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static windows_thread_info *
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windows_add_thread (ptid_t ptid, HANDLE h, void *tlb, bool main_thread_p)
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{
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windows_thread_info *th;
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DWORD id;
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gdb_assert (ptid.tid () != 0);
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id = ptid.tid ();
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if ((th = thread_rec (id, FALSE)))
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return th;
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th = XCNEW (windows_thread_info);
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th->id = id;
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th->h = h;
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th->thread_local_base = (CORE_ADDR) (uintptr_t) tlb;
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th->next = thread_head.next;
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thread_head.next = th;
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/* Add this new thread to the list of threads.
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To be consistent with what's done on other platforms, we add
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the main thread silently (in reality, this thread is really
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more of a process to the user than a thread). */
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if (main_thread_p)
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add_thread_silent (ptid);
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else
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add_thread (ptid);
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/* Set the debug registers for the new thread if they are used. */
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if (debug_registers_used)
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{
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/* Only change the value of the debug registers. */
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th->context.ContextFlags = CONTEXT_DEBUG_REGISTERS;
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CHECK (GetThreadContext (th->h, &th->context));
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th->context.Dr0 = dr[0];
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th->context.Dr1 = dr[1];
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th->context.Dr2 = dr[2];
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th->context.Dr3 = dr[3];
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th->context.Dr6 = DR6_CLEAR_VALUE;
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th->context.Dr7 = dr[7];
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CHECK (SetThreadContext (th->h, &th->context));
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th->context.ContextFlags = 0;
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}
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return th;
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}
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/* Clear out any old thread list and reinitialize it to a
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pristine state. */
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static void
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windows_init_thread_list (void)
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{
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windows_thread_info *th = &thread_head;
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DEBUG_EVENTS (("gdb: windows_init_thread_list\n"));
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init_thread_list ();
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while (th->next != NULL)
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{
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windows_thread_info *here = th->next;
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th->next = here->next;
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xfree (here);
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}
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thread_head.next = NULL;
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}
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/* Delete a thread from the list of threads.
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PTID is the ptid of the thread to be deleted.
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EXIT_CODE is the thread's exit code.
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MAIN_THREAD_P should be true if the thread to be deleted is
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the main thread, false otherwise. */
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static void
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windows_delete_thread (ptid_t ptid, DWORD exit_code, bool main_thread_p)
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{
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windows_thread_info *th;
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DWORD id;
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|
|
gdb_assert (ptid.tid () != 0);
|
|
|
|
id = ptid.tid ();
|
|
|
|
/* Emit a notification about the thread being deleted.
|
|
|
|
Note that no notification was printed when the main thread
|
|
was created, and thus, unless in verbose mode, we should be
|
|
symetrical, and avoid that notification for the main thread
|
|
here as well. */
|
|
|
|
if (info_verbose)
|
|
printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (ptid).c_str ());
|
|
else if (print_thread_events && !main_thread_p)
|
|
printf_unfiltered (_("[%s exited with code %u]\n"),
|
|
target_pid_to_str (ptid).c_str (),
|
|
(unsigned) exit_code);
|
|
|
|
delete_thread (find_thread_ptid (ptid));
|
|
|
|
for (th = &thread_head;
|
|
th->next != NULL && th->next->id != id;
|
|
th = th->next)
|
|
continue;
|
|
|
|
if (th->next != NULL)
|
|
{
|
|
windows_thread_info *here = th->next;
|
|
th->next = here->next;
|
|
xfree (here->name);
|
|
xfree (here);
|
|
}
|
|
}
|
|
|
|
/* Fetches register number R from the given windows_thread_info,
|
|
and supplies its value to the given regcache.
|
|
|
|
This function assumes that R is non-negative. A failed assertion
|
|
is raised if that is not true.
|
|
|
|
This function assumes that TH->RELOAD_CONTEXT is not set, meaning
|
|
that the windows_thread_info has an up-to-date context. A failed
|
|
assertion is raised if that assumption is violated. */
|
|
|
|
static void
|
|
windows_fetch_one_register (struct regcache *regcache,
|
|
windows_thread_info *th, int r)
|
|
{
|
|
gdb_assert (r >= 0);
|
|
gdb_assert (!th->reload_context);
|
|
|
|
char *context_offset = ((char *) &th->context) + mappings[r];
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
if (r == I387_FISEG_REGNUM (tdep))
|
|
{
|
|
long l = *((long *) context_offset) & 0xffff;
|
|
regcache->raw_supply (r, (char *) &l);
|
|
}
|
|
else if (r == I387_FOP_REGNUM (tdep))
|
|
{
|
|
long l = (*((long *) context_offset) >> 16) & ((1 << 11) - 1);
|
|
regcache->raw_supply (r, (char *) &l);
|
|
}
|
|
else if (segment_register_p (r))
|
|
{
|
|
/* GDB treats segment registers as 32bit registers, but they are
|
|
in fact only 16 bits long. Make sure we do not read extra
|
|
bits from our source buffer. */
|
|
long l = *((long *) context_offset) & 0xffff;
|
|
regcache->raw_supply (r, (char *) &l);
|
|
}
|
|
else
|
|
regcache->raw_supply (r, context_offset);
|
|
}
|
|
|
|
void
|
|
windows_nat_target::fetch_registers (struct regcache *regcache, int r)
|
|
{
|
|
DWORD pid = regcache->ptid ().tid ();
|
|
windows_thread_info *th = thread_rec (pid, TRUE);
|
|
|
|
/* Check if TH exists. Windows sometimes uses a non-existent
|
|
thread id in its events. */
|
|
if (th == NULL)
|
|
return;
|
|
|
|
if (th->reload_context)
|
|
{
|
|
#ifdef __CYGWIN__
|
|
if (have_saved_context)
|
|
{
|
|
/* Lie about where the program actually is stopped since
|
|
cygwin has informed us that we should consider the signal
|
|
to have occurred at another location which is stored in
|
|
"saved_context. */
|
|
memcpy (&th->context, &saved_context,
|
|
__COPY_CONTEXT_SIZE);
|
|
have_saved_context = 0;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
th->context.ContextFlags = CONTEXT_DEBUGGER_DR;
|
|
CHECK (GetThreadContext (th->h, &th->context));
|
|
/* Copy dr values from that thread.
|
|
But only if there were not modified since last stop.
|
|
PR gdb/2388 */
|
|
if (!debug_registers_changed)
|
|
{
|
|
dr[0] = th->context.Dr0;
|
|
dr[1] = th->context.Dr1;
|
|
dr[2] = th->context.Dr2;
|
|
dr[3] = th->context.Dr3;
|
|
dr[6] = th->context.Dr6;
|
|
dr[7] = th->context.Dr7;
|
|
}
|
|
}
|
|
th->reload_context = 0;
|
|
}
|
|
|
|
if (r < 0)
|
|
for (r = 0; r < gdbarch_num_regs (regcache->arch()); r++)
|
|
windows_fetch_one_register (regcache, th, r);
|
|
else
|
|
windows_fetch_one_register (regcache, th, r);
|
|
}
|
|
|
|
/* Collect the register number R from the given regcache, and store
|
|
its value into the corresponding area of the given thread's context.
|
|
|
|
This function assumes that R is non-negative. A failed assertion
|
|
assertion is raised if that is not true. */
|
|
|
|
static void
|
|
windows_store_one_register (const struct regcache *regcache,
|
|
windows_thread_info *th, int r)
|
|
{
|
|
gdb_assert (r >= 0);
|
|
|
|
regcache->raw_collect (r, ((char *) &th->context) + mappings[r]);
|
|
}
|
|
|
|
/* Store a new register value into the context of the thread tied to
|
|
REGCACHE. */
|
|
|
|
void
|
|
windows_nat_target::store_registers (struct regcache *regcache, int r)
|
|
{
|
|
DWORD pid = regcache->ptid ().tid ();
|
|
windows_thread_info *th = thread_rec (pid, TRUE);
|
|
|
|
/* Check if TH exists. Windows sometimes uses a non-existent
|
|
thread id in its events. */
|
|
if (th == NULL)
|
|
return;
|
|
|
|
if (r < 0)
|
|
for (r = 0; r < gdbarch_num_regs (regcache->arch ()); r++)
|
|
windows_store_one_register (regcache, th, r);
|
|
else
|
|
windows_store_one_register (regcache, th, r);
|
|
}
|
|
|
|
/* Encapsulate the information required in a call to
|
|
symbol_file_add_args. */
|
|
struct safe_symbol_file_add_args
|
|
{
|
|
char *name;
|
|
int from_tty;
|
|
section_addr_info *addrs;
|
|
int mainline;
|
|
int flags;
|
|
struct ui_file *err, *out;
|
|
struct objfile *ret;
|
|
};
|
|
|
|
/* Maintain a linked list of "so" information. */
|
|
struct lm_info_windows : public lm_info_base
|
|
{
|
|
LPVOID load_addr = 0;
|
|
};
|
|
|
|
static struct so_list solib_start, *solib_end;
|
|
|
|
static struct so_list *
|
|
windows_make_so (const char *name, LPVOID load_addr)
|
|
{
|
|
struct so_list *so;
|
|
char *p;
|
|
#ifndef __CYGWIN__
|
|
char buf[__PMAX];
|
|
char cwd[__PMAX];
|
|
WIN32_FIND_DATA w32_fd;
|
|
HANDLE h = FindFirstFile(name, &w32_fd);
|
|
|
|
if (h == INVALID_HANDLE_VALUE)
|
|
strcpy (buf, name);
|
|
else
|
|
{
|
|
FindClose (h);
|
|
strcpy (buf, name);
|
|
if (GetCurrentDirectory (MAX_PATH + 1, cwd))
|
|
{
|
|
p = strrchr (buf, '\\');
|
|
if (p)
|
|
p[1] = '\0';
|
|
SetCurrentDirectory (buf);
|
|
GetFullPathName (w32_fd.cFileName, MAX_PATH, buf, &p);
|
|
SetCurrentDirectory (cwd);
|
|
}
|
|
}
|
|
if (strcasecmp (buf, "ntdll.dll") == 0)
|
|
{
|
|
GetSystemDirectory (buf, sizeof (buf));
|
|
strcat (buf, "\\ntdll.dll");
|
|
}
|
|
#else
|
|
cygwin_buf_t buf[__PMAX];
|
|
|
|
buf[0] = 0;
|
|
if (access (name, F_OK) != 0)
|
|
{
|
|
if (strcasecmp (name, "ntdll.dll") == 0)
|
|
#ifdef __USEWIDE
|
|
{
|
|
GetSystemDirectoryW (buf, sizeof (buf) / sizeof (wchar_t));
|
|
wcscat (buf, L"\\ntdll.dll");
|
|
}
|
|
#else
|
|
{
|
|
GetSystemDirectoryA (buf, sizeof (buf) / sizeof (wchar_t));
|
|
strcat (buf, "\\ntdll.dll");
|
|
}
|
|
#endif
|
|
}
|
|
#endif
|
|
so = XCNEW (struct so_list);
|
|
lm_info_windows *li = new lm_info_windows;
|
|
so->lm_info = li;
|
|
li->load_addr = load_addr;
|
|
strcpy (so->so_original_name, name);
|
|
#ifndef __CYGWIN__
|
|
strcpy (so->so_name, buf);
|
|
#else
|
|
if (buf[0])
|
|
cygwin_conv_path (CCP_WIN_W_TO_POSIX, buf, so->so_name,
|
|
SO_NAME_MAX_PATH_SIZE);
|
|
else
|
|
{
|
|
char *rname = realpath (name, NULL);
|
|
if (rname && strlen (rname) < SO_NAME_MAX_PATH_SIZE)
|
|
{
|
|
strcpy (so->so_name, rname);
|
|
free (rname);
|
|
}
|
|
else
|
|
error (_("dll path too long"));
|
|
}
|
|
/* Record cygwin1.dll .text start/end. */
|
|
p = strchr (so->so_name, '\0') - (sizeof ("/cygwin1.dll") - 1);
|
|
if (p >= so->so_name && strcasecmp (p, "/cygwin1.dll") == 0)
|
|
{
|
|
asection *text = NULL;
|
|
|
|
gdb_bfd_ref_ptr abfd (gdb_bfd_open (so->so_name, "pei-i386", -1));
|
|
|
|
if (abfd == NULL)
|
|
return so;
|
|
|
|
if (bfd_check_format (abfd.get (), bfd_object))
|
|
text = bfd_get_section_by_name (abfd.get (), ".text");
|
|
|
|
if (!text)
|
|
return so;
|
|
|
|
/* The symbols in a dll are offset by 0x1000, which is the
|
|
offset from 0 of the first byte in an image - because of the
|
|
file header and the section alignment. */
|
|
cygwin_load_start = (CORE_ADDR) (uintptr_t) ((char *)
|
|
load_addr + 0x1000);
|
|
cygwin_load_end = cygwin_load_start + bfd_section_size (abfd.get (),
|
|
text);
|
|
}
|
|
#endif
|
|
|
|
return so;
|
|
}
|
|
|
|
static char *
|
|
get_image_name (HANDLE h, void *address, int unicode)
|
|
{
|
|
#ifdef __CYGWIN__
|
|
static char buf[__PMAX];
|
|
#else
|
|
static char buf[(2 * __PMAX) + 1];
|
|
#endif
|
|
DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
|
|
char *address_ptr;
|
|
int len = 0;
|
|
char b[2];
|
|
SIZE_T done;
|
|
|
|
/* Attempt to read the name of the dll that was detected.
|
|
This is documented to work only when actively debugging
|
|
a program. It will not work for attached processes. */
|
|
if (address == NULL)
|
|
return NULL;
|
|
|
|
/* See if we could read the address of a string, and that the
|
|
address isn't null. */
|
|
if (!ReadProcessMemory (h, address, &address_ptr,
|
|
sizeof (address_ptr), &done)
|
|
|| done != sizeof (address_ptr) || !address_ptr)
|
|
return NULL;
|
|
|
|
/* Find the length of the string. */
|
|
while (ReadProcessMemory (h, address_ptr + len++ * size, &b, size, &done)
|
|
&& (b[0] != 0 || b[size - 1] != 0) && done == size)
|
|
continue;
|
|
|
|
if (!unicode)
|
|
ReadProcessMemory (h, address_ptr, buf, len, &done);
|
|
else
|
|
{
|
|
WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
|
|
ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
|
|
&done);
|
|
#ifdef __CYGWIN__
|
|
wcstombs (buf, unicode_address, __PMAX);
|
|
#else
|
|
WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, sizeof buf,
|
|
0, 0);
|
|
#endif
|
|
}
|
|
|
|
return buf;
|
|
}
|
|
|
|
/* Handle a DLL load event, and return 1.
|
|
|
|
This function assumes that this event did not occur during inferior
|
|
initialization, where their event info may be incomplete (see
|
|
do_initial_windows_stuff and windows_add_all_dlls for more info
|
|
on how we handle DLL loading during that phase). */
|
|
|
|
static void
|
|
handle_load_dll ()
|
|
{
|
|
LOAD_DLL_DEBUG_INFO *event = ¤t_event.u.LoadDll;
|
|
char *dll_name;
|
|
|
|
/* Try getting the DLL name via the lpImageName field of the event.
|
|
Note that Microsoft documents this fields as strictly optional,
|
|
in the sense that it might be NULL. And the first DLL event in
|
|
particular is explicitly documented as "likely not pass[ed]"
|
|
(source: MSDN LOAD_DLL_DEBUG_INFO structure). */
|
|
dll_name = get_image_name (current_process_handle,
|
|
event->lpImageName, event->fUnicode);
|
|
if (!dll_name)
|
|
return;
|
|
|
|
solib_end->next = windows_make_so (dll_name, event->lpBaseOfDll);
|
|
solib_end = solib_end->next;
|
|
|
|
lm_info_windows *li = (lm_info_windows *) solib_end->lm_info;
|
|
|
|
DEBUG_EVENTS (("gdb: Loading dll \"%s\" at %s.\n", solib_end->so_name,
|
|
host_address_to_string (li->load_addr)));
|
|
}
|
|
|
|
static void
|
|
windows_free_so (struct so_list *so)
|
|
{
|
|
lm_info_windows *li = (lm_info_windows *) so->lm_info;
|
|
|
|
delete li;
|
|
xfree (so);
|
|
}
|
|
|
|
/* Handle a DLL unload event.
|
|
Return 1 if successful, or zero otherwise.
|
|
|
|
This function assumes that this event did not occur during inferior
|
|
initialization, where their event info may be incomplete (see
|
|
do_initial_windows_stuff and windows_add_all_dlls for more info
|
|
on how we handle DLL loading during that phase). */
|
|
|
|
static void
|
|
handle_unload_dll ()
|
|
{
|
|
LPVOID lpBaseOfDll = current_event.u.UnloadDll.lpBaseOfDll;
|
|
struct so_list *so;
|
|
|
|
for (so = &solib_start; so->next != NULL; so = so->next)
|
|
{
|
|
lm_info_windows *li_next = (lm_info_windows *) so->next->lm_info;
|
|
|
|
if (li_next->load_addr == lpBaseOfDll)
|
|
{
|
|
struct so_list *sodel = so->next;
|
|
|
|
so->next = sodel->next;
|
|
if (!so->next)
|
|
solib_end = so;
|
|
DEBUG_EVENTS (("gdb: Unloading dll \"%s\".\n", sodel->so_name));
|
|
|
|
windows_free_so (sodel);
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* We did not find any DLL that was previously loaded at this address,
|
|
so register a complaint. We do not report an error, because we have
|
|
observed that this may be happening under some circumstances. For
|
|
instance, running 32bit applications on x64 Windows causes us to receive
|
|
4 mysterious UNLOAD_DLL_DEBUG_EVENTs during the startup phase (these
|
|
events are apparently caused by the WOW layer, the interface between
|
|
32bit and 64bit worlds). */
|
|
complaint (_("dll starting at %s not found."),
|
|
host_address_to_string (lpBaseOfDll));
|
|
}
|
|
|
|
/* Call FUNC wrapped in a TRY/CATCH that swallows all GDB
|
|
exceptions. */
|
|
|
|
static void
|
|
catch_errors (void (*func) ())
|
|
{
|
|
try
|
|
{
|
|
func ();
|
|
}
|
|
catch (const gdb_exception &ex)
|
|
{
|
|
exception_print (gdb_stderr, ex);
|
|
}
|
|
}
|
|
|
|
/* Clear list of loaded DLLs. */
|
|
static void
|
|
windows_clear_solib (void)
|
|
{
|
|
solib_start.next = NULL;
|
|
solib_end = &solib_start;
|
|
}
|
|
|
|
static void
|
|
signal_event_command (const char *args, int from_tty)
|
|
{
|
|
uintptr_t event_id = 0;
|
|
char *endargs = NULL;
|
|
|
|
if (args == NULL)
|
|
error (_("signal-event requires an argument (integer event id)"));
|
|
|
|
event_id = strtoumax (args, &endargs, 10);
|
|
|
|
if ((errno == ERANGE) || (event_id == 0) || (event_id > UINTPTR_MAX) ||
|
|
((HANDLE) event_id == INVALID_HANDLE_VALUE))
|
|
error (_("Failed to convert `%s' to event id"), args);
|
|
|
|
SetEvent ((HANDLE) event_id);
|
|
CloseHandle ((HANDLE) event_id);
|
|
}
|
|
|
|
/* Handle DEBUG_STRING output from child process.
|
|
Cygwin prepends its messages with a "cygwin:". Interpret this as
|
|
a Cygwin signal. Otherwise just print the string as a warning. */
|
|
static int
|
|
handle_output_debug_string (struct target_waitstatus *ourstatus)
|
|
{
|
|
gdb::unique_xmalloc_ptr<char> s;
|
|
int retval = 0;
|
|
|
|
if (!target_read_string
|
|
((CORE_ADDR) (uintptr_t) current_event.u.DebugString.lpDebugStringData,
|
|
&s, 1024, 0)
|
|
|| !s || !*(s.get ()))
|
|
/* nothing to do */;
|
|
else if (!startswith (s.get (), _CYGWIN_SIGNAL_STRING))
|
|
{
|
|
#ifdef __CYGWIN__
|
|
if (!startswith (s.get (), "cYg"))
|
|
#endif
|
|
{
|
|
char *p = strchr (s.get (), '\0');
|
|
|
|
if (p > s.get () && *--p == '\n')
|
|
*p = '\0';
|
|
warning (("%s"), s.get ());
|
|
}
|
|
}
|
|
#ifdef __CYGWIN__
|
|
else
|
|
{
|
|
/* Got a cygwin signal marker. A cygwin signal is followed by
|
|
the signal number itself and then optionally followed by the
|
|
thread id and address to saved context within the DLL. If
|
|
these are supplied, then the given thread is assumed to have
|
|
issued the signal and the context from the thread is assumed
|
|
to be stored at the given address in the inferior. Tell gdb
|
|
to treat this like a real signal. */
|
|
char *p;
|
|
int sig = strtol (s.get () + sizeof (_CYGWIN_SIGNAL_STRING) - 1, &p, 0);
|
|
gdb_signal gotasig = gdb_signal_from_host (sig);
|
|
|
|
ourstatus->value.sig = gotasig;
|
|
if (gotasig)
|
|
{
|
|
LPCVOID x;
|
|
SIZE_T n;
|
|
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
retval = strtoul (p, &p, 0);
|
|
if (!retval)
|
|
retval = main_thread_id;
|
|
else if ((x = (LPCVOID) (uintptr_t) strtoull (p, NULL, 0))
|
|
&& ReadProcessMemory (current_process_handle, x,
|
|
&saved_context,
|
|
__COPY_CONTEXT_SIZE, &n)
|
|
&& n == __COPY_CONTEXT_SIZE)
|
|
have_saved_context = 1;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
return retval;
|
|
}
|
|
|
|
static int
|
|
display_selector (HANDLE thread, DWORD sel)
|
|
{
|
|
LDT_ENTRY info;
|
|
if (GetThreadSelectorEntry (thread, sel, &info))
|
|
{
|
|
int base, limit;
|
|
printf_filtered ("0x%03x: ", (unsigned) sel);
|
|
if (!info.HighWord.Bits.Pres)
|
|
{
|
|
puts_filtered ("Segment not present\n");
|
|
return 0;
|
|
}
|
|
base = (info.HighWord.Bits.BaseHi << 24) +
|
|
(info.HighWord.Bits.BaseMid << 16)
|
|
+ info.BaseLow;
|
|
limit = (info.HighWord.Bits.LimitHi << 16) + info.LimitLow;
|
|
if (info.HighWord.Bits.Granularity)
|
|
limit = (limit << 12) | 0xfff;
|
|
printf_filtered ("base=0x%08x limit=0x%08x", base, limit);
|
|
if (info.HighWord.Bits.Default_Big)
|
|
puts_filtered(" 32-bit ");
|
|
else
|
|
puts_filtered(" 16-bit ");
|
|
switch ((info.HighWord.Bits.Type & 0xf) >> 1)
|
|
{
|
|
case 0:
|
|
puts_filtered ("Data (Read-Only, Exp-up");
|
|
break;
|
|
case 1:
|
|
puts_filtered ("Data (Read/Write, Exp-up");
|
|
break;
|
|
case 2:
|
|
puts_filtered ("Unused segment (");
|
|
break;
|
|
case 3:
|
|
puts_filtered ("Data (Read/Write, Exp-down");
|
|
break;
|
|
case 4:
|
|
puts_filtered ("Code (Exec-Only, N.Conf");
|
|
break;
|
|
case 5:
|
|
puts_filtered ("Code (Exec/Read, N.Conf");
|
|
break;
|
|
case 6:
|
|
puts_filtered ("Code (Exec-Only, Conf");
|
|
break;
|
|
case 7:
|
|
puts_filtered ("Code (Exec/Read, Conf");
|
|
break;
|
|
default:
|
|
printf_filtered ("Unknown type 0x%lx",
|
|
(unsigned long) info.HighWord.Bits.Type);
|
|
}
|
|
if ((info.HighWord.Bits.Type & 0x1) == 0)
|
|
puts_filtered(", N.Acc");
|
|
puts_filtered (")\n");
|
|
if ((info.HighWord.Bits.Type & 0x10) == 0)
|
|
puts_filtered("System selector ");
|
|
printf_filtered ("Priviledge level = %ld. ",
|
|
(unsigned long) info.HighWord.Bits.Dpl);
|
|
if (info.HighWord.Bits.Granularity)
|
|
puts_filtered ("Page granular.\n");
|
|
else
|
|
puts_filtered ("Byte granular.\n");
|
|
return 1;
|
|
}
|
|
else
|
|
{
|
|
DWORD err = GetLastError ();
|
|
if (err == ERROR_NOT_SUPPORTED)
|
|
printf_filtered ("Function not supported\n");
|
|
else
|
|
printf_filtered ("Invalid selector 0x%x.\n", (unsigned) sel);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void
|
|
display_selectors (const char * args, int from_tty)
|
|
{
|
|
if (!current_thread)
|
|
{
|
|
puts_filtered ("Impossible to display selectors now.\n");
|
|
return;
|
|
}
|
|
if (!args)
|
|
{
|
|
|
|
puts_filtered ("Selector $cs\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegCs);
|
|
puts_filtered ("Selector $ds\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegDs);
|
|
puts_filtered ("Selector $es\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegEs);
|
|
puts_filtered ("Selector $ss\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegSs);
|
|
puts_filtered ("Selector $fs\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegFs);
|
|
puts_filtered ("Selector $gs\n");
|
|
display_selector (current_thread->h,
|
|
current_thread->context.SegGs);
|
|
}
|
|
else
|
|
{
|
|
int sel;
|
|
sel = parse_and_eval_long (args);
|
|
printf_filtered ("Selector \"%s\"\n",args);
|
|
display_selector (current_thread->h, sel);
|
|
}
|
|
}
|
|
|
|
#define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
|
|
printf_unfiltered ("gdb: Target exception %s at %s\n", x, \
|
|
host_address_to_string (\
|
|
current_event.u.Exception.ExceptionRecord.ExceptionAddress))
|
|
|
|
static handle_exception_result
|
|
handle_exception (struct target_waitstatus *ourstatus)
|
|
{
|
|
EXCEPTION_RECORD *rec = ¤t_event.u.Exception.ExceptionRecord;
|
|
DWORD code = rec->ExceptionCode;
|
|
handle_exception_result result = HANDLE_EXCEPTION_HANDLED;
|
|
|
|
ourstatus->kind = TARGET_WAITKIND_STOPPED;
|
|
|
|
/* Record the context of the current thread. */
|
|
thread_rec (current_event.dwThreadId, -1);
|
|
|
|
switch (code)
|
|
{
|
|
case EXCEPTION_ACCESS_VIOLATION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ACCESS_VIOLATION");
|
|
ourstatus->value.sig = GDB_SIGNAL_SEGV;
|
|
#ifdef __CYGWIN__
|
|
{
|
|
/* See if the access violation happened within the cygwin DLL
|
|
itself. Cygwin uses a kind of exception handling to deal
|
|
with passed-in invalid addresses. gdb should not treat
|
|
these as real SEGVs since they will be silently handled by
|
|
cygwin. A real SEGV will (theoretically) be caught by
|
|
cygwin later in the process and will be sent as a
|
|
cygwin-specific-signal. So, ignore SEGVs if they show up
|
|
within the text segment of the DLL itself. */
|
|
const char *fn;
|
|
CORE_ADDR addr = (CORE_ADDR) (uintptr_t) rec->ExceptionAddress;
|
|
|
|
if ((!cygwin_exceptions && (addr >= cygwin_load_start
|
|
&& addr < cygwin_load_end))
|
|
|| (find_pc_partial_function (addr, &fn, NULL, NULL)
|
|
&& startswith (fn, "KERNEL32!IsBad")))
|
|
return HANDLE_EXCEPTION_UNHANDLED;
|
|
}
|
|
#endif
|
|
break;
|
|
case STATUS_STACK_OVERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_STACK_OVERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_SEGV;
|
|
break;
|
|
case STATUS_FLOAT_DENORMAL_OPERAND:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DENORMAL_OPERAND");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ARRAY_BOUNDS_EXCEEDED");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_INEXACT_RESULT:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INEXACT_RESULT");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_INVALID_OPERATION:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_INVALID_OPERATION");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_OVERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_OVERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_STACK_CHECK:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_STACK_CHECK");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_UNDERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_UNDERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_FLOAT_DIVIDE_BY_ZERO:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_FLOAT_DIVIDE_BY_ZERO");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_INTEGER_DIVIDE_BY_ZERO:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_DIVIDE_BY_ZERO");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case STATUS_INTEGER_OVERFLOW:
|
|
DEBUG_EXCEPTION_SIMPLE ("STATUS_INTEGER_OVERFLOW");
|
|
ourstatus->value.sig = GDB_SIGNAL_FPE;
|
|
break;
|
|
case EXCEPTION_BREAKPOINT:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
break;
|
|
case DBG_CONTROL_C:
|
|
DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_C");
|
|
ourstatus->value.sig = GDB_SIGNAL_INT;
|
|
break;
|
|
case DBG_CONTROL_BREAK:
|
|
DEBUG_EXCEPTION_SIMPLE ("DBG_CONTROL_BREAK");
|
|
ourstatus->value.sig = GDB_SIGNAL_INT;
|
|
break;
|
|
case EXCEPTION_SINGLE_STEP:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_SINGLE_STEP");
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
break;
|
|
case EXCEPTION_ILLEGAL_INSTRUCTION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_ILLEGAL_INSTRUCTION");
|
|
ourstatus->value.sig = GDB_SIGNAL_ILL;
|
|
break;
|
|
case EXCEPTION_PRIV_INSTRUCTION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_PRIV_INSTRUCTION");
|
|
ourstatus->value.sig = GDB_SIGNAL_ILL;
|
|
break;
|
|
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
|
|
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_NONCONTINUABLE_EXCEPTION");
|
|
ourstatus->value.sig = GDB_SIGNAL_ILL;
|
|
break;
|
|
case MS_VC_EXCEPTION:
|
|
if (rec->NumberParameters >= 3
|
|
&& (rec->ExceptionInformation[0] & 0xffffffff) == 0x1000)
|
|
{
|
|
DWORD named_thread_id;
|
|
windows_thread_info *named_thread;
|
|
CORE_ADDR thread_name_target;
|
|
|
|
DEBUG_EXCEPTION_SIMPLE ("MS_VC_EXCEPTION");
|
|
|
|
thread_name_target = rec->ExceptionInformation[1];
|
|
named_thread_id = (DWORD) (0xffffffff & rec->ExceptionInformation[2]);
|
|
|
|
if (named_thread_id == (DWORD) -1)
|
|
named_thread_id = current_event.dwThreadId;
|
|
|
|
named_thread = thread_rec (named_thread_id, 0);
|
|
if (named_thread != NULL)
|
|
{
|
|
int thread_name_len;
|
|
gdb::unique_xmalloc_ptr<char> thread_name;
|
|
|
|
thread_name_len = target_read_string (thread_name_target,
|
|
&thread_name, 1025, NULL);
|
|
if (thread_name_len > 0)
|
|
{
|
|
thread_name.get ()[thread_name_len - 1] = '\0';
|
|
xfree (named_thread->name);
|
|
named_thread->name = thread_name.release ();
|
|
}
|
|
}
|
|
ourstatus->value.sig = GDB_SIGNAL_TRAP;
|
|
result = HANDLE_EXCEPTION_IGNORED;
|
|
break;
|
|
}
|
|
/* treat improperly formed exception as unknown */
|
|
/* FALLTHROUGH */
|
|
default:
|
|
/* Treat unhandled first chance exceptions specially. */
|
|
if (current_event.u.Exception.dwFirstChance)
|
|
return HANDLE_EXCEPTION_UNHANDLED;
|
|
printf_unfiltered ("gdb: unknown target exception 0x%08x at %s\n",
|
|
(unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode,
|
|
host_address_to_string (
|
|
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
|
|
ourstatus->value.sig = GDB_SIGNAL_UNKNOWN;
|
|
break;
|
|
}
|
|
exception_count++;
|
|
last_sig = ourstatus->value.sig;
|
|
return result;
|
|
}
|
|
|
|
/* Resume thread specified by ID, or all artificially suspended
|
|
threads, if we are continuing execution. KILLED non-zero means we
|
|
have killed the inferior, so we should ignore weird errors due to
|
|
threads shutting down. */
|
|
static BOOL
|
|
windows_continue (DWORD continue_status, int id, int killed)
|
|
{
|
|
windows_thread_info *th;
|
|
BOOL res;
|
|
|
|
DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=0x%x, %s);\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
continue_status == DBG_CONTINUE ?
|
|
"DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
|
|
|
|
for (th = &thread_head; (th = th->next) != NULL;)
|
|
if ((id == -1 || id == (int) th->id)
|
|
&& th->suspended)
|
|
{
|
|
if (debug_registers_changed)
|
|
{
|
|
th->context.ContextFlags |= CONTEXT_DEBUG_REGISTERS;
|
|
th->context.Dr0 = dr[0];
|
|
th->context.Dr1 = dr[1];
|
|
th->context.Dr2 = dr[2];
|
|
th->context.Dr3 = dr[3];
|
|
th->context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->context.Dr7 = dr[7];
|
|
}
|
|
if (th->context.ContextFlags)
|
|
{
|
|
DWORD ec = 0;
|
|
|
|
if (GetExitCodeThread (th->h, &ec)
|
|
&& ec == STILL_ACTIVE)
|
|
{
|
|
BOOL status = SetThreadContext (th->h, &th->context);
|
|
|
|
if (!killed)
|
|
CHECK (status);
|
|
}
|
|
th->context.ContextFlags = 0;
|
|
}
|
|
if (th->suspended > 0)
|
|
(void) ResumeThread (th->h);
|
|
th->suspended = 0;
|
|
}
|
|
|
|
res = ContinueDebugEvent (current_event.dwProcessId,
|
|
current_event.dwThreadId,
|
|
continue_status);
|
|
|
|
if (!res)
|
|
error (_("Failed to resume program execution"
|
|
" (ContinueDebugEvent failed, error %u)"),
|
|
(unsigned int) GetLastError ());
|
|
|
|
debug_registers_changed = 0;
|
|
return res;
|
|
}
|
|
|
|
/* Called in pathological case where Windows fails to send a
|
|
CREATE_PROCESS_DEBUG_EVENT after an attach. */
|
|
static DWORD
|
|
fake_create_process (void)
|
|
{
|
|
current_process_handle = OpenProcess (PROCESS_ALL_ACCESS, FALSE,
|
|
current_event.dwProcessId);
|
|
if (current_process_handle != NULL)
|
|
open_process_used = 1;
|
|
else
|
|
{
|
|
error (_("OpenProcess call failed, GetLastError = %u"),
|
|
(unsigned) GetLastError ());
|
|
/* We can not debug anything in that case. */
|
|
}
|
|
main_thread_id = current_event.dwThreadId;
|
|
current_thread
|
|
= windows_add_thread (ptid_t (current_event.dwProcessId, 0,
|
|
current_event.dwThreadId),
|
|
current_event.u.CreateThread.hThread,
|
|
current_event.u.CreateThread.lpThreadLocalBase,
|
|
true /* main_thread_p */);
|
|
return main_thread_id;
|
|
}
|
|
|
|
void
|
|
windows_nat_target::resume (ptid_t ptid, int step, enum gdb_signal sig)
|
|
{
|
|
windows_thread_info *th;
|
|
DWORD continue_status = DBG_CONTINUE;
|
|
|
|
/* A specific PTID means `step only this thread id'. */
|
|
int resume_all = ptid == minus_one_ptid;
|
|
|
|
/* If we're continuing all threads, it's the current inferior that
|
|
should be handled specially. */
|
|
if (resume_all)
|
|
ptid = inferior_ptid;
|
|
|
|
if (sig != GDB_SIGNAL_0)
|
|
{
|
|
if (current_event.dwDebugEventCode != EXCEPTION_DEBUG_EVENT)
|
|
{
|
|
DEBUG_EXCEPT(("Cannot continue with signal %d here.\n",sig));
|
|
}
|
|
else if (sig == last_sig)
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
else
|
|
#if 0
|
|
/* This code does not seem to work, because
|
|
the kernel does probably not consider changes in the ExceptionRecord
|
|
structure when passing the exception to the inferior.
|
|
Note that this seems possible in the exception handler itself. */
|
|
{
|
|
for (const xlate_exception &x : xlate)
|
|
if (x.us == sig)
|
|
{
|
|
current_event.u.Exception.ExceptionRecord.ExceptionCode
|
|
= x.them;
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
break;
|
|
}
|
|
if (continue_status == DBG_CONTINUE)
|
|
{
|
|
DEBUG_EXCEPT(("Cannot continue with signal %d.\n",sig));
|
|
}
|
|
}
|
|
#endif
|
|
DEBUG_EXCEPT(("Can only continue with received signal %d.\n",
|
|
last_sig));
|
|
}
|
|
|
|
last_sig = GDB_SIGNAL_0;
|
|
|
|
DEBUG_EXEC (("gdb: windows_resume (pid=%d, tid=%ld, step=%d, sig=%d);\n",
|
|
ptid.pid (), ptid.tid (), step, sig));
|
|
|
|
/* Get context for currently selected thread. */
|
|
th = thread_rec (inferior_ptid.tid (), FALSE);
|
|
if (th)
|
|
{
|
|
if (step)
|
|
{
|
|
/* Single step by setting t bit. */
|
|
struct regcache *regcache = get_current_regcache ();
|
|
struct gdbarch *gdbarch = regcache->arch ();
|
|
fetch_registers (regcache, gdbarch_ps_regnum (gdbarch));
|
|
th->context.EFlags |= FLAG_TRACE_BIT;
|
|
}
|
|
|
|
if (th->context.ContextFlags)
|
|
{
|
|
if (debug_registers_changed)
|
|
{
|
|
th->context.Dr0 = dr[0];
|
|
th->context.Dr1 = dr[1];
|
|
th->context.Dr2 = dr[2];
|
|
th->context.Dr3 = dr[3];
|
|
th->context.Dr6 = DR6_CLEAR_VALUE;
|
|
th->context.Dr7 = dr[7];
|
|
}
|
|
CHECK (SetThreadContext (th->h, &th->context));
|
|
th->context.ContextFlags = 0;
|
|
}
|
|
}
|
|
|
|
/* Allow continuing with the same signal that interrupted us.
|
|
Otherwise complain. */
|
|
|
|
if (resume_all)
|
|
windows_continue (continue_status, -1, 0);
|
|
else
|
|
windows_continue (continue_status, ptid.tid (), 0);
|
|
}
|
|
|
|
/* Ctrl-C handler used when the inferior is not run in the same console. The
|
|
handler is in charge of interrupting the inferior using DebugBreakProcess.
|
|
Note that this function is not available prior to Windows XP. In this case
|
|
we emit a warning. */
|
|
static BOOL WINAPI
|
|
ctrl_c_handler (DWORD event_type)
|
|
{
|
|
const int attach_flag = current_inferior ()->attach_flag;
|
|
|
|
/* Only handle Ctrl-C and Ctrl-Break events. Ignore others. */
|
|
if (event_type != CTRL_C_EVENT && event_type != CTRL_BREAK_EVENT)
|
|
return FALSE;
|
|
|
|
/* If the inferior and the debugger share the same console, do nothing as
|
|
the inferior has also received the Ctrl-C event. */
|
|
if (!new_console && !attach_flag)
|
|
return TRUE;
|
|
|
|
if (!DebugBreakProcess (current_process_handle))
|
|
warning (_("Could not interrupt program. "
|
|
"Press Ctrl-c in the program console."));
|
|
|
|
/* Return true to tell that Ctrl-C has been handled. */
|
|
return TRUE;
|
|
}
|
|
|
|
/* Get the next event from the child. Returns a non-zero thread id if the event
|
|
requires handling by WFI (or whatever). */
|
|
static int
|
|
get_windows_debug_event (struct target_ops *ops,
|
|
int pid, struct target_waitstatus *ourstatus)
|
|
{
|
|
BOOL debug_event;
|
|
DWORD continue_status, event_code;
|
|
windows_thread_info *th;
|
|
static windows_thread_info dummy_thread_info;
|
|
DWORD thread_id = 0;
|
|
|
|
last_sig = GDB_SIGNAL_0;
|
|
|
|
if (!(debug_event = WaitForDebugEvent (¤t_event, 1000)))
|
|
goto out;
|
|
|
|
event_count++;
|
|
continue_status = DBG_CONTINUE;
|
|
|
|
event_code = current_event.dwDebugEventCode;
|
|
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
|
|
th = NULL;
|
|
have_saved_context = 0;
|
|
|
|
switch (event_code)
|
|
{
|
|
case CREATE_THREAD_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"CREATE_THREAD_DEBUG_EVENT"));
|
|
if (saw_create != 1)
|
|
{
|
|
struct inferior *inf;
|
|
inf = find_inferior_pid (current_event.dwProcessId);
|
|
if (!saw_create && inf->attach_flag)
|
|
{
|
|
/* Kludge around a Windows bug where first event is a create
|
|
thread event. Caused when attached process does not have
|
|
a main thread. */
|
|
thread_id = fake_create_process ();
|
|
if (thread_id)
|
|
saw_create++;
|
|
}
|
|
break;
|
|
}
|
|
/* Record the existence of this thread. */
|
|
thread_id = current_event.dwThreadId;
|
|
th = windows_add_thread
|
|
(ptid_t (current_event.dwProcessId, 0, current_event.dwThreadId),
|
|
current_event.u.CreateThread.hThread,
|
|
current_event.u.CreateThread.lpThreadLocalBase,
|
|
false /* main_thread_p */);
|
|
|
|
break;
|
|
|
|
case EXIT_THREAD_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"EXIT_THREAD_DEBUG_EVENT"));
|
|
windows_delete_thread (ptid_t (current_event.dwProcessId, 0,
|
|
current_event.dwThreadId),
|
|
current_event.u.ExitThread.dwExitCode,
|
|
false /* main_thread_p */);
|
|
th = &dummy_thread_info;
|
|
break;
|
|
|
|
case CREATE_PROCESS_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"CREATE_PROCESS_DEBUG_EVENT"));
|
|
CloseHandle (current_event.u.CreateProcessInfo.hFile);
|
|
if (++saw_create != 1)
|
|
break;
|
|
|
|
current_process_handle = current_event.u.CreateProcessInfo.hProcess;
|
|
main_thread_id = current_event.dwThreadId;
|
|
/* Add the main thread. */
|
|
th = windows_add_thread
|
|
(ptid_t (current_event.dwProcessId, 0,
|
|
current_event.dwThreadId),
|
|
current_event.u.CreateProcessInfo.hThread,
|
|
current_event.u.CreateProcessInfo.lpThreadLocalBase,
|
|
true /* main_thread_p */);
|
|
thread_id = current_event.dwThreadId;
|
|
break;
|
|
|
|
case EXIT_PROCESS_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"EXIT_PROCESS_DEBUG_EVENT"));
|
|
if (!windows_initialization_done)
|
|
{
|
|
target_terminal::ours ();
|
|
target_mourn_inferior (inferior_ptid);
|
|
error (_("During startup program exited with code 0x%x."),
|
|
(unsigned int) current_event.u.ExitProcess.dwExitCode);
|
|
}
|
|
else if (saw_create == 1)
|
|
{
|
|
windows_delete_thread (ptid_t (current_event.dwProcessId, 0,
|
|
main_thread_id),
|
|
0, true /* main_thread_p */);
|
|
ourstatus->kind = TARGET_WAITKIND_EXITED;
|
|
ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
|
|
thread_id = main_thread_id;
|
|
}
|
|
break;
|
|
|
|
case LOAD_DLL_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"LOAD_DLL_DEBUG_EVENT"));
|
|
CloseHandle (current_event.u.LoadDll.hFile);
|
|
if (saw_create != 1 || ! windows_initialization_done)
|
|
break;
|
|
catch_errors (handle_load_dll);
|
|
ourstatus->kind = TARGET_WAITKIND_LOADED;
|
|
ourstatus->value.integer = 0;
|
|
thread_id = main_thread_id;
|
|
break;
|
|
|
|
case UNLOAD_DLL_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"UNLOAD_DLL_DEBUG_EVENT"));
|
|
if (saw_create != 1 || ! windows_initialization_done)
|
|
break;
|
|
catch_errors (handle_unload_dll);
|
|
ourstatus->kind = TARGET_WAITKIND_LOADED;
|
|
ourstatus->value.integer = 0;
|
|
thread_id = main_thread_id;
|
|
break;
|
|
|
|
case EXCEPTION_DEBUG_EVENT:
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"EXCEPTION_DEBUG_EVENT"));
|
|
if (saw_create != 1)
|
|
break;
|
|
switch (handle_exception (ourstatus))
|
|
{
|
|
case HANDLE_EXCEPTION_UNHANDLED:
|
|
default:
|
|
continue_status = DBG_EXCEPTION_NOT_HANDLED;
|
|
break;
|
|
case HANDLE_EXCEPTION_HANDLED:
|
|
thread_id = current_event.dwThreadId;
|
|
break;
|
|
case HANDLE_EXCEPTION_IGNORED:
|
|
continue_status = DBG_CONTINUE;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case OUTPUT_DEBUG_STRING_EVENT: /* Message from the kernel. */
|
|
DEBUG_EVENTS (("gdb: kernel event for pid=%u tid=0x%x code=%s)\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId,
|
|
"OUTPUT_DEBUG_STRING_EVENT"));
|
|
if (saw_create != 1)
|
|
break;
|
|
thread_id = handle_output_debug_string (ourstatus);
|
|
break;
|
|
|
|
default:
|
|
if (saw_create != 1)
|
|
break;
|
|
printf_unfiltered ("gdb: kernel event for pid=%u tid=0x%x\n",
|
|
(unsigned) current_event.dwProcessId,
|
|
(unsigned) current_event.dwThreadId);
|
|
printf_unfiltered (" unknown event code %u\n",
|
|
(unsigned) current_event.dwDebugEventCode);
|
|
break;
|
|
}
|
|
|
|
if (!thread_id || saw_create != 1)
|
|
{
|
|
CHECK (windows_continue (continue_status, -1, 0));
|
|
}
|
|
else
|
|
{
|
|
inferior_ptid = ptid_t (current_event.dwProcessId, 0, thread_id);
|
|
current_thread = th;
|
|
if (!current_thread)
|
|
current_thread = thread_rec (thread_id, TRUE);
|
|
}
|
|
|
|
out:
|
|
return thread_id;
|
|
}
|
|
|
|
/* Wait for interesting events to occur in the target process. */
|
|
ptid_t
|
|
windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
|
|
int options)
|
|
{
|
|
int pid = -1;
|
|
|
|
/* We loop when we get a non-standard exception rather than return
|
|
with a SPURIOUS because resume can try and step or modify things,
|
|
which needs a current_thread->h. But some of these exceptions mark
|
|
the birth or death of threads, which mean that the current thread
|
|
isn't necessarily what you think it is. */
|
|
|
|
while (1)
|
|
{
|
|
int retval;
|
|
|
|
/* If the user presses Ctrl-c while the debugger is waiting
|
|
for an event, he expects the debugger to interrupt his program
|
|
and to get the prompt back. There are two possible situations:
|
|
|
|
- The debugger and the program do not share the console, in
|
|
which case the Ctrl-c event only reached the debugger.
|
|
In that case, the ctrl_c handler will take care of interrupting
|
|
the inferior. Note that this case is working starting with
|
|
Windows XP. For Windows 2000, Ctrl-C should be pressed in the
|
|
inferior console.
|
|
|
|
- The debugger and the program share the same console, in which
|
|
case both debugger and inferior will receive the Ctrl-c event.
|
|
In that case the ctrl_c handler will ignore the event, as the
|
|
Ctrl-c event generated inside the inferior will trigger the
|
|
expected debug event.
|
|
|
|
FIXME: brobecker/2008-05-20: If the inferior receives the
|
|
signal first and the delay until GDB receives that signal
|
|
is sufficiently long, GDB can sometimes receive the SIGINT
|
|
after we have unblocked the CTRL+C handler. This would
|
|
lead to the debugger stopping prematurely while handling
|
|
the new-thread event that comes with the handling of the SIGINT
|
|
inside the inferior, and then stop again immediately when
|
|
the user tries to resume the execution in the inferior.
|
|
This is a classic race that we should try to fix one day. */
|
|
SetConsoleCtrlHandler (&ctrl_c_handler, TRUE);
|
|
retval = get_windows_debug_event (this, pid, ourstatus);
|
|
SetConsoleCtrlHandler (&ctrl_c_handler, FALSE);
|
|
|
|
if (retval)
|
|
return ptid_t (current_event.dwProcessId, 0, retval);
|
|
else
|
|
{
|
|
int detach = 0;
|
|
|
|
if (deprecated_ui_loop_hook != NULL)
|
|
detach = deprecated_ui_loop_hook (0);
|
|
|
|
if (detach)
|
|
kill ();
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Iterate over all DLLs currently mapped by our inferior, and
|
|
add them to our list of solibs. */
|
|
|
|
static void
|
|
windows_add_all_dlls (void)
|
|
{
|
|
HMODULE dummy_hmodule;
|
|
DWORD cb_needed;
|
|
HMODULE *hmodules;
|
|
int i;
|
|
|
|
if (EnumProcessModules (current_process_handle, &dummy_hmodule,
|
|
sizeof (HMODULE), &cb_needed) == 0)
|
|
return;
|
|
|
|
if (cb_needed < 1)
|
|
return;
|
|
|
|
hmodules = (HMODULE *) alloca (cb_needed);
|
|
if (EnumProcessModules (current_process_handle, hmodules,
|
|
cb_needed, &cb_needed) == 0)
|
|
return;
|
|
|
|
for (i = 1; i < (int) (cb_needed / sizeof (HMODULE)); i++)
|
|
{
|
|
MODULEINFO mi;
|
|
#ifdef __USEWIDE
|
|
wchar_t dll_name[__PMAX];
|
|
char name[__PMAX];
|
|
#else
|
|
char dll_name[__PMAX];
|
|
char *name;
|
|
#endif
|
|
if (GetModuleInformation (current_process_handle, hmodules[i],
|
|
&mi, sizeof (mi)) == 0)
|
|
continue;
|
|
if (GetModuleFileNameEx (current_process_handle, hmodules[i],
|
|
dll_name, sizeof (dll_name)) == 0)
|
|
continue;
|
|
#ifdef __USEWIDE
|
|
wcstombs (name, dll_name, __PMAX);
|
|
#else
|
|
name = dll_name;
|
|
#endif
|
|
|
|
solib_end->next = windows_make_so (name, mi.lpBaseOfDll);
|
|
solib_end = solib_end->next;
|
|
}
|
|
}
|
|
|
|
static void
|
|
do_initial_windows_stuff (struct target_ops *ops, DWORD pid, int attaching)
|
|
{
|
|
int i;
|
|
struct inferior *inf;
|
|
|
|
last_sig = GDB_SIGNAL_0;
|
|
event_count = 0;
|
|
exception_count = 0;
|
|
open_process_used = 0;
|
|
debug_registers_changed = 0;
|
|
debug_registers_used = 0;
|
|
for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
|
|
dr[i] = 0;
|
|
#ifdef __CYGWIN__
|
|
cygwin_load_start = cygwin_load_end = 0;
|
|
#endif
|
|
current_event.dwProcessId = pid;
|
|
memset (¤t_event, 0, sizeof (current_event));
|
|
if (!target_is_pushed (ops))
|
|
push_target (ops);
|
|
disable_breakpoints_in_shlibs ();
|
|
windows_clear_solib ();
|
|
clear_proceed_status (0);
|
|
init_wait_for_inferior ();
|
|
|
|
inf = current_inferior ();
|
|
inferior_appeared (inf, pid);
|
|
inf->attach_flag = attaching;
|
|
|
|
/* Make the new process the current inferior, so terminal handling
|
|
can rely on it. When attaching, we don't know about any thread
|
|
id here, but that's OK --- nothing should be referencing the
|
|
current thread until we report an event out of windows_wait. */
|
|
inferior_ptid = ptid_t (pid);
|
|
|
|
target_terminal::init ();
|
|
target_terminal::inferior ();
|
|
|
|
windows_initialization_done = 0;
|
|
|
|
while (1)
|
|
{
|
|
struct target_waitstatus status;
|
|
|
|
ops->wait (minus_one_ptid, &status, 0);
|
|
|
|
/* Note windows_wait returns TARGET_WAITKIND_SPURIOUS for thread
|
|
events. */
|
|
if (status.kind != TARGET_WAITKIND_LOADED
|
|
&& status.kind != TARGET_WAITKIND_SPURIOUS)
|
|
break;
|
|
|
|
ops->resume (minus_one_ptid, 0, GDB_SIGNAL_0);
|
|
}
|
|
|
|
/* Now that the inferior has been started and all DLLs have been mapped,
|
|
we can iterate over all DLLs and load them in.
|
|
|
|
We avoid doing it any earlier because, on certain versions of Windows,
|
|
LOAD_DLL_DEBUG_EVENTs are sometimes not complete. In particular,
|
|
we have seen on Windows 8.1 that the ntdll.dll load event does not
|
|
include the DLL name, preventing us from creating an associated SO.
|
|
A possible explanation is that ntdll.dll might be mapped before
|
|
the SO info gets created by the Windows system -- ntdll.dll is
|
|
the first DLL to be reported via LOAD_DLL_DEBUG_EVENT and other DLLs
|
|
do not seem to suffer from that problem.
|
|
|
|
Rather than try to work around this sort of issue, it is much
|
|
simpler to just ignore DLL load/unload events during the startup
|
|
phase, and then process them all in one batch now. */
|
|
windows_add_all_dlls ();
|
|
|
|
windows_initialization_done = 1;
|
|
return;
|
|
}
|
|
|
|
/* Try to set or remove a user privilege to the current process. Return -1
|
|
if that fails, the previous setting of that privilege otherwise.
|
|
|
|
This code is copied from the Cygwin source code and rearranged to allow
|
|
dynamically loading of the needed symbols from advapi32 which is only
|
|
available on NT/2K/XP. */
|
|
static int
|
|
set_process_privilege (const char *privilege, BOOL enable)
|
|
{
|
|
HANDLE token_hdl = NULL;
|
|
LUID restore_priv;
|
|
TOKEN_PRIVILEGES new_priv, orig_priv;
|
|
int ret = -1;
|
|
DWORD size;
|
|
|
|
if (!OpenProcessToken (GetCurrentProcess (),
|
|
TOKEN_QUERY | TOKEN_ADJUST_PRIVILEGES,
|
|
&token_hdl))
|
|
goto out;
|
|
|
|
if (!LookupPrivilegeValueA (NULL, privilege, &restore_priv))
|
|
goto out;
|
|
|
|
new_priv.PrivilegeCount = 1;
|
|
new_priv.Privileges[0].Luid = restore_priv;
|
|
new_priv.Privileges[0].Attributes = enable ? SE_PRIVILEGE_ENABLED : 0;
|
|
|
|
if (!AdjustTokenPrivileges (token_hdl, FALSE, &new_priv,
|
|
sizeof orig_priv, &orig_priv, &size))
|
|
goto out;
|
|
#if 0
|
|
/* Disabled, otherwise every `attach' in an unprivileged user session
|
|
would raise the "Failed to get SE_DEBUG_NAME privilege" warning in
|
|
windows_attach(). */
|
|
/* AdjustTokenPrivileges returns TRUE even if the privilege could not
|
|
be enabled. GetLastError () returns an correct error code, though. */
|
|
if (enable && GetLastError () == ERROR_NOT_ALL_ASSIGNED)
|
|
goto out;
|
|
#endif
|
|
|
|
ret = orig_priv.Privileges[0].Attributes == SE_PRIVILEGE_ENABLED ? 1 : 0;
|
|
|
|
out:
|
|
if (token_hdl)
|
|
CloseHandle (token_hdl);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* Attach to process PID, then initialize for debugging it. */
|
|
|
|
void
|
|
windows_nat_target::attach (const char *args, int from_tty)
|
|
{
|
|
BOOL ok;
|
|
DWORD pid;
|
|
|
|
pid = parse_pid_to_attach (args);
|
|
|
|
if (set_process_privilege (SE_DEBUG_NAME, TRUE) < 0)
|
|
{
|
|
printf_unfiltered ("Warning: Failed to get SE_DEBUG_NAME privilege\n");
|
|
printf_unfiltered ("This can cause attach to "
|
|
"fail on Windows NT/2K/XP\n");
|
|
}
|
|
|
|
windows_init_thread_list ();
|
|
ok = DebugActiveProcess (pid);
|
|
saw_create = 0;
|
|
|
|
#ifdef __CYGWIN__
|
|
if (!ok)
|
|
{
|
|
/* Try fall back to Cygwin pid. */
|
|
pid = cygwin_internal (CW_CYGWIN_PID_TO_WINPID, pid);
|
|
|
|
if (pid > 0)
|
|
ok = DebugActiveProcess (pid);
|
|
}
|
|
#endif
|
|
|
|
if (!ok)
|
|
error (_("Can't attach to process."));
|
|
|
|
DebugSetProcessKillOnExit (FALSE);
|
|
|
|
if (from_tty)
|
|
{
|
|
char *exec_file = (char *) get_exec_file (0);
|
|
|
|
if (exec_file)
|
|
printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
|
|
target_pid_to_str (ptid_t (pid)).c_str ());
|
|
else
|
|
printf_unfiltered ("Attaching to %s\n",
|
|
target_pid_to_str (ptid_t (pid)).c_str ());
|
|
}
|
|
|
|
do_initial_windows_stuff (this, pid, 1);
|
|
target_terminal::ours ();
|
|
}
|
|
|
|
void
|
|
windows_nat_target::detach (inferior *inf, int from_tty)
|
|
{
|
|
int detached = 1;
|
|
|
|
ptid_t ptid = minus_one_ptid;
|
|
resume (ptid, 0, GDB_SIGNAL_0);
|
|
|
|
if (!DebugActiveProcessStop (current_event.dwProcessId))
|
|
{
|
|
error (_("Can't detach process %u (error %u)"),
|
|
(unsigned) current_event.dwProcessId, (unsigned) GetLastError ());
|
|
detached = 0;
|
|
}
|
|
DebugSetProcessKillOnExit (FALSE);
|
|
|
|
if (detached && from_tty)
|
|
{
|
|
const char *exec_file = get_exec_file (0);
|
|
if (exec_file == 0)
|
|
exec_file = "";
|
|
printf_unfiltered ("Detaching from program: %s, Pid %u\n", exec_file,
|
|
(unsigned) current_event.dwProcessId);
|
|
}
|
|
|
|
x86_cleanup_dregs ();
|
|
inferior_ptid = null_ptid;
|
|
detach_inferior (inf);
|
|
|
|
maybe_unpush_target ();
|
|
}
|
|
|
|
/* Try to determine the executable filename.
|
|
|
|
EXE_NAME_RET is a pointer to a buffer whose size is EXE_NAME_MAX_LEN.
|
|
|
|
Upon success, the filename is stored inside EXE_NAME_RET, and
|
|
this function returns nonzero.
|
|
|
|
Otherwise, this function returns zero and the contents of
|
|
EXE_NAME_RET is undefined. */
|
|
|
|
static int
|
|
windows_get_exec_module_filename (char *exe_name_ret, size_t exe_name_max_len)
|
|
{
|
|
DWORD len;
|
|
HMODULE dh_buf;
|
|
DWORD cbNeeded;
|
|
|
|
cbNeeded = 0;
|
|
if (!EnumProcessModules (current_process_handle, &dh_buf,
|
|
sizeof (HMODULE), &cbNeeded) || !cbNeeded)
|
|
return 0;
|
|
|
|
/* We know the executable is always first in the list of modules,
|
|
which we just fetched. So no need to fetch more. */
|
|
|
|
#ifdef __CYGWIN__
|
|
{
|
|
/* Cygwin prefers that the path be in /x/y/z format, so extract
|
|
the filename into a temporary buffer first, and then convert it
|
|
to POSIX format into the destination buffer. */
|
|
cygwin_buf_t *pathbuf = (cygwin_buf_t *) alloca (exe_name_max_len * sizeof (cygwin_buf_t));
|
|
|
|
len = GetModuleFileNameEx (current_process_handle,
|
|
dh_buf, pathbuf, exe_name_max_len);
|
|
if (len == 0)
|
|
error (_("Error getting executable filename: %u."),
|
|
(unsigned) GetLastError ());
|
|
if (cygwin_conv_path (CCP_WIN_W_TO_POSIX, pathbuf, exe_name_ret,
|
|
exe_name_max_len) < 0)
|
|
error (_("Error converting executable filename to POSIX: %d."), errno);
|
|
}
|
|
#else
|
|
len = GetModuleFileNameEx (current_process_handle,
|
|
dh_buf, exe_name_ret, exe_name_max_len);
|
|
if (len == 0)
|
|
error (_("Error getting executable filename: %u."),
|
|
(unsigned) GetLastError ());
|
|
#endif
|
|
|
|
return 1; /* success */
|
|
}
|
|
|
|
/* The pid_to_exec_file target_ops method for this platform. */
|
|
|
|
char *
|
|
windows_nat_target::pid_to_exec_file (int pid)
|
|
{
|
|
static char path[__PMAX];
|
|
#ifdef __CYGWIN__
|
|
/* Try to find exe name as symlink target of /proc/<pid>/exe. */
|
|
int nchars;
|
|
char procexe[sizeof ("/proc/4294967295/exe")];
|
|
|
|
xsnprintf (procexe, sizeof (procexe), "/proc/%u/exe", pid);
|
|
nchars = readlink (procexe, path, sizeof(path));
|
|
if (nchars > 0 && nchars < sizeof (path))
|
|
{
|
|
path[nchars] = '\0'; /* Got it */
|
|
return path;
|
|
}
|
|
#endif
|
|
|
|
/* If we get here then either Cygwin is hosed, this isn't a Cygwin version
|
|
of gdb, or we're trying to debug a non-Cygwin windows executable. */
|
|
if (!windows_get_exec_module_filename (path, sizeof (path)))
|
|
path[0] = '\0';
|
|
|
|
return path;
|
|
}
|
|
|
|
/* Print status information about what we're accessing. */
|
|
|
|
void
|
|
windows_nat_target::files_info ()
|
|
{
|
|
struct inferior *inf = current_inferior ();
|
|
|
|
printf_unfiltered ("\tUsing the running image of %s %s.\n",
|
|
inf->attach_flag ? "attached" : "child",
|
|
target_pid_to_str (inferior_ptid).c_str ());
|
|
}
|
|
|
|
/* Modify CreateProcess parameters for use of a new separate console.
|
|
Parameters are:
|
|
*FLAGS: DWORD parameter for general process creation flags.
|
|
*SI: STARTUPINFO structure, for which the console window size and
|
|
console buffer size is filled in if GDB is running in a console.
|
|
to create the new console.
|
|
The size of the used font is not available on all versions of
|
|
Windows OS. Furthermore, the current font might not be the default
|
|
font, but this is still better than before.
|
|
If the windows and buffer sizes are computed,
|
|
SI->DWFLAGS is changed so that this information is used
|
|
by CreateProcess function. */
|
|
|
|
static void
|
|
windows_set_console_info (STARTUPINFO *si, DWORD *flags)
|
|
{
|
|
HANDLE hconsole = CreateFile ("CONOUT$", GENERIC_READ | GENERIC_WRITE,
|
|
FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, 0);
|
|
|
|
if (hconsole != INVALID_HANDLE_VALUE)
|
|
{
|
|
CONSOLE_SCREEN_BUFFER_INFO sbinfo;
|
|
COORD font_size;
|
|
CONSOLE_FONT_INFO cfi;
|
|
|
|
GetCurrentConsoleFont (hconsole, FALSE, &cfi);
|
|
font_size = GetConsoleFontSize (hconsole, cfi.nFont);
|
|
GetConsoleScreenBufferInfo(hconsole, &sbinfo);
|
|
si->dwXSize = sbinfo.srWindow.Right - sbinfo.srWindow.Left + 1;
|
|
si->dwYSize = sbinfo.srWindow.Bottom - sbinfo.srWindow.Top + 1;
|
|
if (font_size.X)
|
|
si->dwXSize *= font_size.X;
|
|
else
|
|
si->dwXSize *= 8;
|
|
if (font_size.Y)
|
|
si->dwYSize *= font_size.Y;
|
|
else
|
|
si->dwYSize *= 12;
|
|
si->dwXCountChars = sbinfo.dwSize.X;
|
|
si->dwYCountChars = sbinfo.dwSize.Y;
|
|
si->dwFlags |= STARTF_USESIZE | STARTF_USECOUNTCHARS;
|
|
}
|
|
*flags |= CREATE_NEW_CONSOLE;
|
|
}
|
|
|
|
#ifndef __CYGWIN__
|
|
/* Function called by qsort to sort environment strings. */
|
|
|
|
static int
|
|
envvar_cmp (const void *a, const void *b)
|
|
{
|
|
const char **p = (const char **) a;
|
|
const char **q = (const char **) b;
|
|
return strcasecmp (*p, *q);
|
|
}
|
|
#endif
|
|
|
|
#ifdef __CYGWIN__
|
|
static void
|
|
clear_win32_environment (char **env)
|
|
{
|
|
int i;
|
|
size_t len;
|
|
wchar_t *copy = NULL, *equalpos;
|
|
|
|
for (i = 0; env[i] && *env[i]; i++)
|
|
{
|
|
len = mbstowcs (NULL, env[i], 0) + 1;
|
|
copy = (wchar_t *) xrealloc (copy, len * sizeof (wchar_t));
|
|
mbstowcs (copy, env[i], len);
|
|
equalpos = wcschr (copy, L'=');
|
|
if (equalpos)
|
|
*equalpos = L'\0';
|
|
SetEnvironmentVariableW (copy, NULL);
|
|
}
|
|
xfree (copy);
|
|
}
|
|
#endif
|
|
|
|
#ifndef __CYGWIN__
|
|
|
|
/* Redirection of inferior I/O streams for native MS-Windows programs.
|
|
Unlike on Unix, where this is handled by invoking the inferior via
|
|
the shell, on MS-Windows we need to emulate the cmd.exe shell.
|
|
|
|
The official documentation of the cmd.exe redirection features is here:
|
|
|
|
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/redirection.mspx
|
|
|
|
(That page talks about Windows XP, but there's no newer
|
|
documentation, so we assume later versions of cmd.exe didn't change
|
|
anything.)
|
|
|
|
Caveat: the documentation on that page seems to include a few lies.
|
|
For example, it describes strange constructs 1<&2 and 2<&1, which
|
|
seem to work only when 1>&2 resp. 2>&1 would make sense, and so I
|
|
think the cmd.exe parser of the redirection symbols simply doesn't
|
|
care about the < vs > distinction in these cases. Therefore, the
|
|
supported features are explicitly documented below.
|
|
|
|
The emulation below aims at supporting all the valid use cases
|
|
supported by cmd.exe, which include:
|
|
|
|
< FILE redirect standard input from FILE
|
|
0< FILE redirect standard input from FILE
|
|
<&N redirect standard input from file descriptor N
|
|
0<&N redirect standard input from file descriptor N
|
|
> FILE redirect standard output to FILE
|
|
>> FILE append standard output to FILE
|
|
1>> FILE append standard output to FILE
|
|
>&N redirect standard output to file descriptor N
|
|
1>&N redirect standard output to file descriptor N
|
|
>>&N append standard output to file descriptor N
|
|
1>>&N append standard output to file descriptor N
|
|
2> FILE redirect standard error to FILE
|
|
2>> FILE append standard error to FILE
|
|
2>&N redirect standard error to file descriptor N
|
|
2>>&N append standard error to file descriptor N
|
|
|
|
Note that using N > 2 in the above construct is supported, but
|
|
requires that the corresponding file descriptor be open by some
|
|
means elsewhere or outside GDB. Also note that using ">&0" or
|
|
"<&2" will generally fail, because the file descriptor redirected
|
|
from is normally open in an incompatible mode (e.g., FD 0 is open
|
|
for reading only). IOW, use of such tricks is not recommended;
|
|
you are on your own.
|
|
|
|
We do NOT support redirection of file descriptors above 2, as in
|
|
"3>SOME-FILE", because MinGW compiled programs don't (supporting
|
|
that needs special handling in the startup code that MinGW
|
|
doesn't have). Pipes are also not supported.
|
|
|
|
As for invalid use cases, where the redirection contains some
|
|
error, the emulation below will detect that and produce some
|
|
error and/or failure. But the behavior in those cases is not
|
|
bug-for-bug compatible with what cmd.exe does in those cases.
|
|
That's because what cmd.exe does then is not well defined, and
|
|
seems to be a side effect of the cmd.exe parsing of the command
|
|
line more than anything else. For example, try redirecting to an
|
|
invalid file name, as in "> foo:bar".
|
|
|
|
There are also minor syntactic deviations from what cmd.exe does
|
|
in some corner cases. For example, it doesn't support the likes
|
|
of "> &foo" to mean redirect to file named literally "&foo"; we
|
|
do support that here, because that, too, sounds like some issue
|
|
with the cmd.exe parser. Another nicety is that we support
|
|
redirection targets that use file names with forward slashes,
|
|
something cmd.exe doesn't -- this comes in handy since GDB
|
|
file-name completion can be used when typing the command line for
|
|
the inferior. */
|
|
|
|
/* Support routines for redirecting standard handles of the inferior. */
|
|
|
|
/* Parse a single redirection spec, open/duplicate the specified
|
|
file/fd, and assign the appropriate value to one of the 3 standard
|
|
file descriptors. */
|
|
static int
|
|
redir_open (const char *redir_string, int *inp, int *out, int *err)
|
|
{
|
|
int *fd, ref_fd = -2;
|
|
int mode;
|
|
const char *fname = redir_string + 1;
|
|
int rc = *redir_string;
|
|
|
|
switch (rc)
|
|
{
|
|
case '0':
|
|
fname++;
|
|
/* FALLTHROUGH */
|
|
case '<':
|
|
fd = inp;
|
|
mode = O_RDONLY;
|
|
break;
|
|
case '1': case '2':
|
|
fname++;
|
|
/* FALLTHROUGH */
|
|
case '>':
|
|
fd = (rc == '2') ? err : out;
|
|
mode = O_WRONLY | O_CREAT;
|
|
if (*fname == '>')
|
|
{
|
|
fname++;
|
|
mode |= O_APPEND;
|
|
}
|
|
else
|
|
mode |= O_TRUNC;
|
|
break;
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (*fname == '&' && '0' <= fname[1] && fname[1] <= '9')
|
|
{
|
|
/* A reference to a file descriptor. */
|
|
char *fdtail;
|
|
ref_fd = (int) strtol (fname + 1, &fdtail, 10);
|
|
if (fdtail > fname + 1 && *fdtail == '\0')
|
|
{
|
|
/* Don't allow redirection when open modes are incompatible. */
|
|
if ((ref_fd == 0 && (fd == out || fd == err))
|
|
|| ((ref_fd == 1 || ref_fd == 2) && fd == inp))
|
|
{
|
|
errno = EPERM;
|
|
return -1;
|
|
}
|
|
if (ref_fd == 0)
|
|
ref_fd = *inp;
|
|
else if (ref_fd == 1)
|
|
ref_fd = *out;
|
|
else if (ref_fd == 2)
|
|
ref_fd = *err;
|
|
}
|
|
else
|
|
{
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
}
|
|
else
|
|
fname++; /* skip the separator space */
|
|
/* If the descriptor is already open, close it. This allows
|
|
multiple specs of redirections for the same stream, which is
|
|
somewhat nonsensical, but still valid and supported by cmd.exe.
|
|
(But cmd.exe only opens a single file in this case, the one
|
|
specified by the last redirection spec on the command line.) */
|
|
if (*fd >= 0)
|
|
_close (*fd);
|
|
if (ref_fd == -2)
|
|
{
|
|
*fd = _open (fname, mode, _S_IREAD | _S_IWRITE);
|
|
if (*fd < 0)
|
|
return -1;
|
|
}
|
|
else if (ref_fd == -1)
|
|
*fd = -1; /* reset to default destination */
|
|
else
|
|
{
|
|
*fd = _dup (ref_fd);
|
|
if (*fd < 0)
|
|
return -1;
|
|
}
|
|
/* _open just sets a flag for O_APPEND, which won't be passed to the
|
|
inferior, so we need to actually move the file pointer. */
|
|
if ((mode & O_APPEND) != 0)
|
|
_lseek (*fd, 0L, SEEK_END);
|
|
return 0;
|
|
}
|
|
|
|
/* Canonicalize a single redirection spec and set up the corresponding
|
|
file descriptor as specified. */
|
|
static int
|
|
redir_set_redirection (const char *s, int *inp, int *out, int *err)
|
|
{
|
|
char buf[__PMAX + 2 + 5]; /* extra space for quotes & redirection string */
|
|
char *d = buf;
|
|
const char *start = s;
|
|
int quote = 0;
|
|
|
|
*d++ = *s++; /* copy the 1st character, < or > or a digit */
|
|
if ((*start == '>' || *start == '1' || *start == '2')
|
|
&& *s == '>')
|
|
{
|
|
*d++ = *s++;
|
|
if (*s == '>' && *start != '>')
|
|
*d++ = *s++;
|
|
}
|
|
else if (*start == '0' && *s == '<')
|
|
*d++ = *s++;
|
|
/* cmd.exe recognizes "&N" only immediately after the redirection symbol. */
|
|
if (*s != '&')
|
|
{
|
|
while (isspace (*s)) /* skip whitespace before file name */
|
|
s++;
|
|
*d++ = ' '; /* separate file name with a single space */
|
|
}
|
|
|
|
/* Copy the file name. */
|
|
while (*s)
|
|
{
|
|
/* Remove quoting characters from the file name in buf[]. */
|
|
if (*s == '"') /* could support '..' quoting here */
|
|
{
|
|
if (!quote)
|
|
quote = *s++;
|
|
else if (*s == quote)
|
|
{
|
|
quote = 0;
|
|
s++;
|
|
}
|
|
else
|
|
*d++ = *s++;
|
|
}
|
|
else if (*s == '\\')
|
|
{
|
|
if (s[1] == '"') /* could support '..' here */
|
|
s++;
|
|
*d++ = *s++;
|
|
}
|
|
else if (isspace (*s) && !quote)
|
|
break;
|
|
else
|
|
*d++ = *s++;
|
|
if (d - buf >= sizeof (buf) - 1)
|
|
{
|
|
errno = ENAMETOOLONG;
|
|
return 0;
|
|
}
|
|
}
|
|
*d = '\0';
|
|
|
|
/* Windows doesn't allow redirection characters in file names, so we
|
|
can bail out early if they use them, or if there's no target file
|
|
name after the redirection symbol. */
|
|
if (d[-1] == '>' || d[-1] == '<')
|
|
{
|
|
errno = ENOENT;
|
|
return 0;
|
|
}
|
|
if (redir_open (buf, inp, out, err) == 0)
|
|
return s - start;
|
|
return 0;
|
|
}
|
|
|
|
/* Parse the command line for redirection specs and prepare the file
|
|
descriptors for the 3 standard streams accordingly. */
|
|
static bool
|
|
redirect_inferior_handles (const char *cmd_orig, char *cmd,
|
|
int *inp, int *out, int *err)
|
|
{
|
|
const char *s = cmd_orig;
|
|
char *d = cmd;
|
|
int quote = 0;
|
|
bool retval = false;
|
|
|
|
while (isspace (*s))
|
|
*d++ = *s++;
|
|
|
|
while (*s)
|
|
{
|
|
if (*s == '"') /* could also support '..' quoting here */
|
|
{
|
|
if (!quote)
|
|
quote = *s;
|
|
else if (*s == quote)
|
|
quote = 0;
|
|
}
|
|
else if (*s == '\\')
|
|
{
|
|
if (s[1] == '"') /* escaped quote char */
|
|
s++;
|
|
}
|
|
else if (!quote)
|
|
{
|
|
/* Process a single redirection candidate. */
|
|
if (*s == '<' || *s == '>'
|
|
|| ((*s == '1' || *s == '2') && s[1] == '>')
|
|
|| (*s == '0' && s[1] == '<'))
|
|
{
|
|
int skip = redir_set_redirection (s, inp, out, err);
|
|
|
|
if (skip <= 0)
|
|
return false;
|
|
retval = true;
|
|
s += skip;
|
|
}
|
|
}
|
|
if (*s)
|
|
*d++ = *s++;
|
|
}
|
|
*d = '\0';
|
|
return retval;
|
|
}
|
|
#endif /* !__CYGWIN__ */
|
|
|
|
/* Start an inferior windows child process and sets inferior_ptid to its pid.
|
|
EXEC_FILE is the file to run.
|
|
ALLARGS is a string containing the arguments to the program.
|
|
ENV is the environment vector to pass. Errors reported with error(). */
|
|
|
|
void
|
|
windows_nat_target::create_inferior (const char *exec_file,
|
|
const std::string &origallargs,
|
|
char **in_env, int from_tty)
|
|
{
|
|
STARTUPINFO si;
|
|
#ifdef __CYGWIN__
|
|
cygwin_buf_t real_path[__PMAX];
|
|
cygwin_buf_t shell[__PMAX]; /* Path to shell */
|
|
cygwin_buf_t infcwd[__PMAX];
|
|
const char *sh;
|
|
cygwin_buf_t *toexec;
|
|
cygwin_buf_t *cygallargs;
|
|
cygwin_buf_t *args;
|
|
char **old_env = NULL;
|
|
PWCHAR w32_env;
|
|
size_t len;
|
|
int tty;
|
|
int ostdin, ostdout, ostderr;
|
|
#else /* !__CYGWIN__ */
|
|
char shell[__PMAX]; /* Path to shell */
|
|
const char *toexec;
|
|
char *args, *allargs_copy;
|
|
size_t args_len, allargs_len;
|
|
int fd_inp = -1, fd_out = -1, fd_err = -1;
|
|
HANDLE tty = INVALID_HANDLE_VALUE;
|
|
bool redirected = false;
|
|
char *w32env;
|
|
char *temp;
|
|
size_t envlen;
|
|
int i;
|
|
size_t envsize;
|
|
char **env;
|
|
#endif /* !__CYGWIN__ */
|
|
const char *allargs = origallargs.c_str ();
|
|
PROCESS_INFORMATION pi;
|
|
BOOL ret;
|
|
DWORD flags = 0;
|
|
const char *inferior_io_terminal = get_inferior_io_terminal ();
|
|
|
|
if (!exec_file)
|
|
error (_("No executable specified, use `target exec'."));
|
|
|
|
const char *inferior_cwd = get_inferior_cwd ();
|
|
std::string expanded_infcwd;
|
|
if (inferior_cwd != NULL)
|
|
{
|
|
expanded_infcwd = gdb_tilde_expand (inferior_cwd);
|
|
/* Mirror slashes on inferior's cwd. */
|
|
std::replace (expanded_infcwd.begin (), expanded_infcwd.end (),
|
|
'/', '\\');
|
|
inferior_cwd = expanded_infcwd.c_str ();
|
|
}
|
|
|
|
memset (&si, 0, sizeof (si));
|
|
si.cb = sizeof (si);
|
|
|
|
if (new_group)
|
|
flags |= CREATE_NEW_PROCESS_GROUP;
|
|
|
|
if (new_console)
|
|
windows_set_console_info (&si, &flags);
|
|
|
|
#ifdef __CYGWIN__
|
|
if (!useshell)
|
|
{
|
|
flags |= DEBUG_ONLY_THIS_PROCESS;
|
|
if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, exec_file, real_path,
|
|
__PMAX * sizeof (cygwin_buf_t)) < 0)
|
|
error (_("Error starting executable: %d"), errno);
|
|
toexec = real_path;
|
|
#ifdef __USEWIDE
|
|
len = mbstowcs (NULL, allargs, 0) + 1;
|
|
if (len == (size_t) -1)
|
|
error (_("Error starting executable: %d"), errno);
|
|
cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
|
|
mbstowcs (cygallargs, allargs, len);
|
|
#else /* !__USEWIDE */
|
|
cygallargs = allargs;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
sh = get_shell ();
|
|
if (cygwin_conv_path (CCP_POSIX_TO_WIN_W, sh, shell, __PMAX) < 0)
|
|
error (_("Error starting executable via shell: %d"), errno);
|
|
#ifdef __USEWIDE
|
|
len = sizeof (L" -c 'exec '") + mbstowcs (NULL, exec_file, 0)
|
|
+ mbstowcs (NULL, allargs, 0) + 2;
|
|
cygallargs = (wchar_t *) alloca (len * sizeof (wchar_t));
|
|
swprintf (cygallargs, len, L" -c 'exec %s %s'", exec_file, allargs);
|
|
#else /* !__USEWIDE */
|
|
len = (sizeof (" -c 'exec '") + strlen (exec_file)
|
|
+ strlen (allargs) + 2);
|
|
cygallargs = (char *) alloca (len);
|
|
xsnprintf (cygallargs, len, " -c 'exec %s %s'", exec_file, allargs);
|
|
#endif /* __USEWIDE */
|
|
toexec = shell;
|
|
flags |= DEBUG_PROCESS;
|
|
}
|
|
|
|
if (inferior_cwd != NULL
|
|
&& cygwin_conv_path (CCP_POSIX_TO_WIN_W, inferior_cwd,
|
|
infcwd, strlen (inferior_cwd)) < 0)
|
|
error (_("Error converting inferior cwd: %d"), errno);
|
|
|
|
#ifdef __USEWIDE
|
|
args = (cygwin_buf_t *) alloca ((wcslen (toexec) + wcslen (cygallargs) + 2)
|
|
* sizeof (wchar_t));
|
|
wcscpy (args, toexec);
|
|
wcscat (args, L" ");
|
|
wcscat (args, cygallargs);
|
|
#else /* !__USEWIDE */
|
|
args = (cygwin_buf_t *) alloca (strlen (toexec) + strlen (cygallargs) + 2);
|
|
strcpy (args, toexec);
|
|
strcat (args, " ");
|
|
strcat (args, cygallargs);
|
|
#endif /* !__USEWIDE */
|
|
|
|
#ifdef CW_CVT_ENV_TO_WINENV
|
|
/* First try to create a direct Win32 copy of the POSIX environment. */
|
|
w32_env = (PWCHAR) cygwin_internal (CW_CVT_ENV_TO_WINENV, in_env);
|
|
if (w32_env != (PWCHAR) -1)
|
|
flags |= CREATE_UNICODE_ENVIRONMENT;
|
|
else
|
|
/* If that fails, fall back to old method tweaking GDB's environment. */
|
|
#endif /* CW_CVT_ENV_TO_WINENV */
|
|
{
|
|
/* Reset all Win32 environment variables to avoid leftover on next run. */
|
|
clear_win32_environment (environ);
|
|
/* Prepare the environment vars for CreateProcess. */
|
|
old_env = environ;
|
|
environ = in_env;
|
|
cygwin_internal (CW_SYNC_WINENV);
|
|
w32_env = NULL;
|
|
}
|
|
|
|
if (!inferior_io_terminal)
|
|
tty = ostdin = ostdout = ostderr = -1;
|
|
else
|
|
{
|
|
tty = open (inferior_io_terminal, O_RDWR | O_NOCTTY);
|
|
if (tty < 0)
|
|
{
|
|
print_sys_errmsg (inferior_io_terminal, errno);
|
|
ostdin = ostdout = ostderr = -1;
|
|
}
|
|
else
|
|
{
|
|
ostdin = dup (0);
|
|
ostdout = dup (1);
|
|
ostderr = dup (2);
|
|
dup2 (tty, 0);
|
|
dup2 (tty, 1);
|
|
dup2 (tty, 2);
|
|
}
|
|
}
|
|
|
|
windows_init_thread_list ();
|
|
ret = CreateProcess (0,
|
|
args, /* command line */
|
|
NULL, /* Security */
|
|
NULL, /* thread */
|
|
TRUE, /* inherit handles */
|
|
flags, /* start flags */
|
|
w32_env, /* environment */
|
|
inferior_cwd != NULL ? infcwd : NULL, /* current
|
|
directory */
|
|
&si,
|
|
&pi);
|
|
if (w32_env)
|
|
/* Just free the Win32 environment, if it could be created. */
|
|
free (w32_env);
|
|
else
|
|
{
|
|
/* Reset all environment variables to avoid leftover on next run. */
|
|
clear_win32_environment (in_env);
|
|
/* Restore normal GDB environment variables. */
|
|
environ = old_env;
|
|
cygwin_internal (CW_SYNC_WINENV);
|
|
}
|
|
|
|
if (tty >= 0)
|
|
{
|
|
::close (tty);
|
|
dup2 (ostdin, 0);
|
|
dup2 (ostdout, 1);
|
|
dup2 (ostderr, 2);
|
|
::close (ostdin);
|
|
::close (ostdout);
|
|
::close (ostderr);
|
|
}
|
|
#else /* !__CYGWIN__ */
|
|
allargs_len = strlen (allargs);
|
|
allargs_copy = strcpy ((char *) alloca (allargs_len + 1), allargs);
|
|
if (strpbrk (allargs_copy, "<>") != NULL)
|
|
{
|
|
int e = errno;
|
|
errno = 0;
|
|
redirected =
|
|
redirect_inferior_handles (allargs, allargs_copy,
|
|
&fd_inp, &fd_out, &fd_err);
|
|
if (errno)
|
|
warning (_("Error in redirection: %s."), strerror (errno));
|
|
else
|
|
errno = e;
|
|
allargs_len = strlen (allargs_copy);
|
|
}
|
|
/* If not all the standard streams are redirected by the command
|
|
line, use inferior_io_terminal for those which aren't. */
|
|
if (inferior_io_terminal
|
|
&& !(fd_inp >= 0 && fd_out >= 0 && fd_err >= 0))
|
|
{
|
|
SECURITY_ATTRIBUTES sa;
|
|
sa.nLength = sizeof(sa);
|
|
sa.lpSecurityDescriptor = 0;
|
|
sa.bInheritHandle = TRUE;
|
|
tty = CreateFileA (inferior_io_terminal, GENERIC_READ | GENERIC_WRITE,
|
|
0, &sa, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
|
|
if (tty == INVALID_HANDLE_VALUE)
|
|
warning (_("Warning: Failed to open TTY %s, error %#x."),
|
|
inferior_io_terminal, (unsigned) GetLastError ());
|
|
}
|
|
if (redirected || tty != INVALID_HANDLE_VALUE)
|
|
{
|
|
if (fd_inp >= 0)
|
|
si.hStdInput = (HANDLE) _get_osfhandle (fd_inp);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdInput = tty;
|
|
else
|
|
si.hStdInput = GetStdHandle (STD_INPUT_HANDLE);
|
|
if (fd_out >= 0)
|
|
si.hStdOutput = (HANDLE) _get_osfhandle (fd_out);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdOutput = tty;
|
|
else
|
|
si.hStdOutput = GetStdHandle (STD_OUTPUT_HANDLE);
|
|
if (fd_err >= 0)
|
|
si.hStdError = (HANDLE) _get_osfhandle (fd_err);
|
|
else if (tty != INVALID_HANDLE_VALUE)
|
|
si.hStdError = tty;
|
|
else
|
|
si.hStdError = GetStdHandle (STD_ERROR_HANDLE);
|
|
si.dwFlags |= STARTF_USESTDHANDLES;
|
|
}
|
|
|
|
toexec = exec_file;
|
|
/* Build the command line, a space-separated list of tokens where
|
|
the first token is the name of the module to be executed.
|
|
To avoid ambiguities introduced by spaces in the module name,
|
|
we quote it. */
|
|
args_len = strlen (toexec) + 2 /* quotes */ + allargs_len + 2;
|
|
args = (char *) alloca (args_len);
|
|
xsnprintf (args, args_len, "\"%s\" %s", toexec, allargs_copy);
|
|
|
|
flags |= DEBUG_ONLY_THIS_PROCESS;
|
|
|
|
/* CreateProcess takes the environment list as a null terminated set of
|
|
strings (i.e. two nulls terminate the list). */
|
|
|
|
/* Get total size for env strings. */
|
|
for (envlen = 0, i = 0; in_env[i] && *in_env[i]; i++)
|
|
envlen += strlen (in_env[i]) + 1;
|
|
|
|
envsize = sizeof (in_env[0]) * (i + 1);
|
|
env = (char **) alloca (envsize);
|
|
memcpy (env, in_env, envsize);
|
|
/* Windows programs expect the environment block to be sorted. */
|
|
qsort (env, i, sizeof (char *), envvar_cmp);
|
|
|
|
w32env = (char *) alloca (envlen + 1);
|
|
|
|
/* Copy env strings into new buffer. */
|
|
for (temp = w32env, i = 0; env[i] && *env[i]; i++)
|
|
{
|
|
strcpy (temp, env[i]);
|
|
temp += strlen (temp) + 1;
|
|
}
|
|
|
|
/* Final nil string to terminate new env. */
|
|
*temp = 0;
|
|
|
|
windows_init_thread_list ();
|
|
ret = CreateProcessA (0,
|
|
args, /* command line */
|
|
NULL, /* Security */
|
|
NULL, /* thread */
|
|
TRUE, /* inherit handles */
|
|
flags, /* start flags */
|
|
w32env, /* environment */
|
|
inferior_cwd, /* current directory */
|
|
&si,
|
|
&pi);
|
|
if (tty != INVALID_HANDLE_VALUE)
|
|
CloseHandle (tty);
|
|
if (fd_inp >= 0)
|
|
_close (fd_inp);
|
|
if (fd_out >= 0)
|
|
_close (fd_out);
|
|
if (fd_err >= 0)
|
|
_close (fd_err);
|
|
#endif /* !__CYGWIN__ */
|
|
|
|
if (!ret)
|
|
error (_("Error creating process %s, (error %u)."),
|
|
exec_file, (unsigned) GetLastError ());
|
|
|
|
CloseHandle (pi.hThread);
|
|
CloseHandle (pi.hProcess);
|
|
|
|
if (useshell && shell[0] != '\0')
|
|
saw_create = -1;
|
|
else
|
|
saw_create = 0;
|
|
|
|
do_initial_windows_stuff (this, pi.dwProcessId, 0);
|
|
|
|
/* windows_continue (DBG_CONTINUE, -1, 0); */
|
|
}
|
|
|
|
void
|
|
windows_nat_target::mourn_inferior ()
|
|
{
|
|
(void) windows_continue (DBG_CONTINUE, -1, 0);
|
|
x86_cleanup_dregs();
|
|
if (open_process_used)
|
|
{
|
|
CHECK (CloseHandle (current_process_handle));
|
|
open_process_used = 0;
|
|
}
|
|
inf_child_target::mourn_inferior ();
|
|
}
|
|
|
|
/* Send a SIGINT to the process group. This acts just like the user typed a
|
|
^C on the controlling terminal. */
|
|
|
|
void
|
|
windows_nat_target::interrupt ()
|
|
{
|
|
DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
|
|
CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
|
|
registers_changed (); /* refresh register state */
|
|
}
|
|
|
|
/* Helper for windows_xfer_partial that handles memory transfers.
|
|
Arguments are like target_xfer_partial. */
|
|
|
|
static enum target_xfer_status
|
|
windows_xfer_memory (gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST memaddr, ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
SIZE_T done = 0;
|
|
BOOL success;
|
|
DWORD lasterror = 0;
|
|
|
|
if (writebuf != NULL)
|
|
{
|
|
DEBUG_MEM (("gdb: write target memory, %s bytes at %s\n",
|
|
pulongest (len), core_addr_to_string (memaddr)));
|
|
success = WriteProcessMemory (current_process_handle,
|
|
(LPVOID) (uintptr_t) memaddr, writebuf,
|
|
len, &done);
|
|
if (!success)
|
|
lasterror = GetLastError ();
|
|
FlushInstructionCache (current_process_handle,
|
|
(LPCVOID) (uintptr_t) memaddr, len);
|
|
}
|
|
else
|
|
{
|
|
DEBUG_MEM (("gdb: read target memory, %s bytes at %s\n",
|
|
pulongest (len), core_addr_to_string (memaddr)));
|
|
success = ReadProcessMemory (current_process_handle,
|
|
(LPCVOID) (uintptr_t) memaddr, readbuf,
|
|
len, &done);
|
|
if (!success)
|
|
lasterror = GetLastError ();
|
|
}
|
|
*xfered_len = (ULONGEST) done;
|
|
if (!success && lasterror == ERROR_PARTIAL_COPY && done > 0)
|
|
return TARGET_XFER_OK;
|
|
else
|
|
return success ? TARGET_XFER_OK : TARGET_XFER_E_IO;
|
|
}
|
|
|
|
void
|
|
windows_nat_target::kill ()
|
|
{
|
|
CHECK (TerminateProcess (current_process_handle, 0));
|
|
|
|
for (;;)
|
|
{
|
|
if (!windows_continue (DBG_CONTINUE, -1, 1))
|
|
break;
|
|
if (!WaitForDebugEvent (¤t_event, INFINITE))
|
|
break;
|
|
if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
|
|
break;
|
|
}
|
|
|
|
target_mourn_inferior (inferior_ptid); /* Or just windows_mourn_inferior? */
|
|
}
|
|
|
|
void
|
|
windows_nat_target::close ()
|
|
{
|
|
DEBUG_EVENTS (("gdb: windows_close, inferior_ptid=%d\n",
|
|
inferior_ptid.pid ()));
|
|
}
|
|
|
|
/* Convert pid to printable format. */
|
|
std::string
|
|
windows_nat_target::pid_to_str (ptid_t ptid)
|
|
{
|
|
if (ptid.tid () != 0)
|
|
return string_printf ("Thread %d.0x%lx", ptid.pid (), ptid.tid ());
|
|
|
|
return normal_pid_to_str (ptid);
|
|
}
|
|
|
|
static enum target_xfer_status
|
|
windows_xfer_shared_libraries (struct target_ops *ops,
|
|
enum target_object object, const char *annex,
|
|
gdb_byte *readbuf, const gdb_byte *writebuf,
|
|
ULONGEST offset, ULONGEST len,
|
|
ULONGEST *xfered_len)
|
|
{
|
|
struct obstack obstack;
|
|
const char *buf;
|
|
LONGEST len_avail;
|
|
struct so_list *so;
|
|
|
|
if (writebuf)
|
|
return TARGET_XFER_E_IO;
|
|
|
|
obstack_init (&obstack);
|
|
obstack_grow_str (&obstack, "<library-list>\n");
|
|
for (so = solib_start.next; so; so = so->next)
|
|
{
|
|
lm_info_windows *li = (lm_info_windows *) so->lm_info;
|
|
|
|
windows_xfer_shared_library (so->so_name, (CORE_ADDR)
|
|
(uintptr_t) li->load_addr,
|
|
target_gdbarch (), &obstack);
|
|
}
|
|
obstack_grow_str0 (&obstack, "</library-list>\n");
|
|
|
|
buf = (const char *) obstack_finish (&obstack);
|
|
len_avail = strlen (buf);
|
|
if (offset >= len_avail)
|
|
len= 0;
|
|
else
|
|
{
|
|
if (len > len_avail - offset)
|
|
len = len_avail - offset;
|
|
memcpy (readbuf, buf + offset, len);
|
|
}
|
|
|
|
obstack_free (&obstack, NULL);
|
|
*xfered_len = (ULONGEST) len;
|
|
return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF;
|
|
}
|
|
|
|
enum target_xfer_status
|
|
windows_nat_target::xfer_partial (enum target_object object,
|
|
const char *annex, gdb_byte *readbuf,
|
|
const gdb_byte *writebuf, ULONGEST offset,
|
|
ULONGEST len, ULONGEST *xfered_len)
|
|
{
|
|
switch (object)
|
|
{
|
|
case TARGET_OBJECT_MEMORY:
|
|
return windows_xfer_memory (readbuf, writebuf, offset, len, xfered_len);
|
|
|
|
case TARGET_OBJECT_LIBRARIES:
|
|
return windows_xfer_shared_libraries (this, object, annex, readbuf,
|
|
writebuf, offset, len, xfered_len);
|
|
|
|
default:
|
|
if (beneath () == NULL)
|
|
{
|
|
/* This can happen when requesting the transfer of unsupported
|
|
objects before a program has been started (and therefore
|
|
with the current_target having no target beneath). */
|
|
return TARGET_XFER_E_IO;
|
|
}
|
|
return beneath ()->xfer_partial (object, annex,
|
|
readbuf, writebuf, offset, len,
|
|
xfered_len);
|
|
}
|
|
}
|
|
|
|
/* Provide thread local base, i.e. Thread Information Block address.
|
|
Returns 1 if ptid is found and sets *ADDR to thread_local_base. */
|
|
|
|
bool
|
|
windows_nat_target::get_tib_address (ptid_t ptid, CORE_ADDR *addr)
|
|
{
|
|
windows_thread_info *th;
|
|
|
|
th = thread_rec (ptid.tid (), 0);
|
|
if (th == NULL)
|
|
return false;
|
|
|
|
if (addr != NULL)
|
|
*addr = th->thread_local_base;
|
|
|
|
return true;
|
|
}
|
|
|
|
ptid_t
|
|
windows_nat_target::get_ada_task_ptid (long lwp, long thread)
|
|
{
|
|
return ptid_t (inferior_ptid.pid (), 0, lwp);
|
|
}
|
|
|
|
/* Implementation of the to_thread_name method. */
|
|
|
|
const char *
|
|
windows_nat_target::thread_name (struct thread_info *thr)
|
|
{
|
|
return thread_rec (thr->ptid.tid (), 0)->name;
|
|
}
|
|
|
|
|
|
void
|
|
_initialize_windows_nat (void)
|
|
{
|
|
x86_dr_low.set_control = cygwin_set_dr7;
|
|
x86_dr_low.set_addr = cygwin_set_dr;
|
|
x86_dr_low.get_addr = cygwin_get_dr;
|
|
x86_dr_low.get_status = cygwin_get_dr6;
|
|
x86_dr_low.get_control = cygwin_get_dr7;
|
|
|
|
/* x86_dr_low.debug_register_length field is set by
|
|
calling x86_set_debug_register_length function
|
|
in processor windows specific native file. */
|
|
|
|
add_inf_child_target (&the_windows_nat_target);
|
|
|
|
#ifdef __CYGWIN__
|
|
cygwin_internal (CW_SET_DOS_FILE_WARNING, 0);
|
|
#endif
|
|
|
|
add_com ("signal-event", class_run, signal_event_command, _("\
|
|
Signal a crashed process with event ID, to allow its debugging.\n\
|
|
This command is needed in support of setting up GDB as JIT debugger on \
|
|
MS-Windows. The command should be invoked from the GDB command line using \
|
|
the '-ex' command-line option. The ID of the event that blocks the \
|
|
crashed process will be supplied by the Windows JIT debugging mechanism."));
|
|
|
|
#ifdef __CYGWIN__
|
|
add_setshow_boolean_cmd ("shell", class_support, &useshell, _("\
|
|
Set use of shell to start subprocess."), _("\
|
|
Show use of shell to start subprocess."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("cygwin-exceptions", class_support,
|
|
&cygwin_exceptions, _("\
|
|
Break when an exception is detected in the Cygwin DLL itself."), _("\
|
|
Show whether gdb breaks on exceptions in the Cygwin DLL itself."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
#endif
|
|
|
|
add_setshow_boolean_cmd ("new-console", class_support, &new_console, _("\
|
|
Set creation of new console when creating child process."), _("\
|
|
Show creation of new console when creating child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("new-group", class_support, &new_group, _("\
|
|
Set creation of new group when creating child process."), _("\
|
|
Show creation of new group when creating child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugexec", class_support, &debug_exec, _("\
|
|
Set whether to display execution in child process."), _("\
|
|
Show whether to display execution in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugevents", class_support, &debug_events, _("\
|
|
Set whether to display kernel events in child process."), _("\
|
|
Show whether to display kernel events in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugmemory", class_support, &debug_memory, _("\
|
|
Set whether to display memory accesses in child process."), _("\
|
|
Show whether to display memory accesses in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
add_setshow_boolean_cmd ("debugexceptions", class_support,
|
|
&debug_exceptions, _("\
|
|
Set whether to display kernel exceptions in child process."), _("\
|
|
Show whether to display kernel exceptions in child process."), NULL,
|
|
NULL,
|
|
NULL, /* FIXME: i18n: */
|
|
&setlist, &showlist);
|
|
|
|
init_w32_command_list ();
|
|
|
|
add_cmd ("selector", class_info, display_selectors,
|
|
_("Display selectors infos."),
|
|
&info_w32_cmdlist);
|
|
}
|
|
|
|
/* Hardware watchpoint support, adapted from go32-nat.c code. */
|
|
|
|
/* Pass the address ADDR to the inferior in the I'th debug register.
|
|
Here we just store the address in dr array, the registers will be
|
|
actually set up when windows_continue is called. */
|
|
static void
|
|
cygwin_set_dr (int i, CORE_ADDR addr)
|
|
{
|
|
if (i < 0 || i > 3)
|
|
internal_error (__FILE__, __LINE__,
|
|
_("Invalid register %d in cygwin_set_dr.\n"), i);
|
|
dr[i] = addr;
|
|
debug_registers_changed = 1;
|
|
debug_registers_used = 1;
|
|
}
|
|
|
|
/* Pass the value VAL to the inferior in the DR7 debug control
|
|
register. Here we just store the address in D_REGS, the watchpoint
|
|
will be actually set up in windows_wait. */
|
|
static void
|
|
cygwin_set_dr7 (unsigned long val)
|
|
{
|
|
dr[7] = (CORE_ADDR) val;
|
|
debug_registers_changed = 1;
|
|
debug_registers_used = 1;
|
|
}
|
|
|
|
/* Get the value of debug register I from the inferior. */
|
|
|
|
static CORE_ADDR
|
|
cygwin_get_dr (int i)
|
|
{
|
|
return dr[i];
|
|
}
|
|
|
|
/* Get the value of the DR6 debug status register from the inferior.
|
|
Here we just return the value stored in dr[6]
|
|
by the last call to thread_rec for current_event.dwThreadId id. */
|
|
static unsigned long
|
|
cygwin_get_dr6 (void)
|
|
{
|
|
return (unsigned long) dr[6];
|
|
}
|
|
|
|
/* Get the value of the DR7 debug status register from the inferior.
|
|
Here we just return the value stored in dr[7] by the last call to
|
|
thread_rec for current_event.dwThreadId id. */
|
|
|
|
static unsigned long
|
|
cygwin_get_dr7 (void)
|
|
{
|
|
return (unsigned long) dr[7];
|
|
}
|
|
|
|
/* Determine if the thread referenced by "ptid" is alive
|
|
by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
|
|
it means that the thread has died. Otherwise it is assumed to be alive. */
|
|
|
|
bool
|
|
windows_nat_target::thread_alive (ptid_t ptid)
|
|
{
|
|
int tid;
|
|
|
|
gdb_assert (ptid.tid () != 0);
|
|
tid = ptid.tid ();
|
|
|
|
return WaitForSingleObject (thread_rec (tid, FALSE)->h, 0) != WAIT_OBJECT_0;
|
|
}
|
|
|
|
void
|
|
_initialize_check_for_gdb_ini (void)
|
|
{
|
|
char *homedir;
|
|
if (inhibit_gdbinit)
|
|
return;
|
|
|
|
homedir = getenv ("HOME");
|
|
if (homedir)
|
|
{
|
|
char *p;
|
|
char *oldini = (char *) alloca (strlen (homedir) +
|
|
sizeof ("gdb.ini") + 1);
|
|
strcpy (oldini, homedir);
|
|
p = strchr (oldini, '\0');
|
|
if (p > oldini && !IS_DIR_SEPARATOR (p[-1]))
|
|
*p++ = '/';
|
|
strcpy (p, "gdb.ini");
|
|
if (access (oldini, 0) == 0)
|
|
{
|
|
int len = strlen (oldini);
|
|
char *newini = (char *) alloca (len + 2);
|
|
|
|
xsnprintf (newini, len + 2, "%.*s.gdbinit",
|
|
(int) (len - (sizeof ("gdb.ini") - 1)), oldini);
|
|
warning (_("obsolete '%s' found. Rename to '%s'."), oldini, newini);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Define dummy functions which always return error for the rare cases where
|
|
these functions could not be found. */
|
|
static BOOL WINAPI
|
|
bad_DebugActiveProcessStop (DWORD w)
|
|
{
|
|
return FALSE;
|
|
}
|
|
static BOOL WINAPI
|
|
bad_DebugBreakProcess (HANDLE w)
|
|
{
|
|
return FALSE;
|
|
}
|
|
static BOOL WINAPI
|
|
bad_DebugSetProcessKillOnExit (BOOL w)
|
|
{
|
|
return FALSE;
|
|
}
|
|
static BOOL WINAPI
|
|
bad_EnumProcessModules (HANDLE w, HMODULE *x, DWORD y, LPDWORD z)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
#ifdef __USEWIDE
|
|
static DWORD WINAPI
|
|
bad_GetModuleFileNameExW (HANDLE w, HMODULE x, LPWSTR y, DWORD z)
|
|
{
|
|
return 0;
|
|
}
|
|
#else
|
|
static DWORD WINAPI
|
|
bad_GetModuleFileNameExA (HANDLE w, HMODULE x, LPSTR y, DWORD z)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static BOOL WINAPI
|
|
bad_GetModuleInformation (HANDLE w, HMODULE x, LPMODULEINFO y, DWORD z)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
static BOOL WINAPI
|
|
bad_OpenProcessToken (HANDLE w, DWORD x, PHANDLE y)
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
static BOOL WINAPI
|
|
bad_GetCurrentConsoleFont (HANDLE w, BOOL bMaxWindow, CONSOLE_FONT_INFO *f)
|
|
{
|
|
f->nFont = 0;
|
|
return 1;
|
|
}
|
|
static COORD WINAPI
|
|
bad_GetConsoleFontSize (HANDLE w, DWORD nFont)
|
|
{
|
|
COORD size;
|
|
size.X = 8;
|
|
size.Y = 12;
|
|
return size;
|
|
}
|
|
|
|
/* Load any functions which may not be available in ancient versions
|
|
of Windows. */
|
|
|
|
void
|
|
_initialize_loadable (void)
|
|
{
|
|
HMODULE hm = NULL;
|
|
|
|
#define GPA(m, func) \
|
|
func = (func ## _ftype *) GetProcAddress (m, #func)
|
|
|
|
hm = LoadLibrary ("kernel32.dll");
|
|
if (hm)
|
|
{
|
|
GPA (hm, DebugActiveProcessStop);
|
|
GPA (hm, DebugBreakProcess);
|
|
GPA (hm, DebugSetProcessKillOnExit);
|
|
GPA (hm, GetConsoleFontSize);
|
|
GPA (hm, DebugActiveProcessStop);
|
|
GPA (hm, GetCurrentConsoleFont);
|
|
}
|
|
|
|
/* Set variables to dummy versions of these processes if the function
|
|
wasn't found in kernel32.dll. */
|
|
if (!DebugBreakProcess)
|
|
DebugBreakProcess = bad_DebugBreakProcess;
|
|
if (!DebugActiveProcessStop || !DebugSetProcessKillOnExit)
|
|
{
|
|
DebugActiveProcessStop = bad_DebugActiveProcessStop;
|
|
DebugSetProcessKillOnExit = bad_DebugSetProcessKillOnExit;
|
|
}
|
|
if (!GetConsoleFontSize)
|
|
GetConsoleFontSize = bad_GetConsoleFontSize;
|
|
if (!GetCurrentConsoleFont)
|
|
GetCurrentConsoleFont = bad_GetCurrentConsoleFont;
|
|
|
|
/* Load optional functions used for retrieving filename information
|
|
associated with the currently debugged process or its dlls. */
|
|
hm = LoadLibrary ("psapi.dll");
|
|
if (hm)
|
|
{
|
|
GPA (hm, EnumProcessModules);
|
|
GPA (hm, GetModuleInformation);
|
|
GetModuleFileNameEx = (GetModuleFileNameEx_ftype *)
|
|
GetProcAddress (hm, GetModuleFileNameEx_name);
|
|
}
|
|
|
|
if (!EnumProcessModules || !GetModuleInformation || !GetModuleFileNameEx)
|
|
{
|
|
/* Set variables to dummy versions of these processes if the function
|
|
wasn't found in psapi.dll. */
|
|
EnumProcessModules = bad_EnumProcessModules;
|
|
GetModuleInformation = bad_GetModuleInformation;
|
|
GetModuleFileNameEx = bad_GetModuleFileNameEx;
|
|
/* This will probably fail on Windows 9x/Me. Let the user know
|
|
that we're missing some functionality. */
|
|
warning(_("\
|
|
cannot automatically find executable file or library to read symbols.\n\
|
|
Use \"file\" or \"dll\" command to load executable/libraries directly."));
|
|
}
|
|
|
|
hm = LoadLibrary ("advapi32.dll");
|
|
if (hm)
|
|
{
|
|
GPA (hm, OpenProcessToken);
|
|
GPA (hm, LookupPrivilegeValueA);
|
|
GPA (hm, AdjustTokenPrivileges);
|
|
/* Only need to set one of these since if OpenProcessToken fails nothing
|
|
else is needed. */
|
|
if (!OpenProcessToken || !LookupPrivilegeValueA
|
|
|| !AdjustTokenPrivileges)
|
|
OpenProcessToken = bad_OpenProcessToken;
|
|
}
|
|
|
|
#undef GPA
|
|
}
|