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Share handle_exception 

Both gdb and gdbserver have a "handle_exception" function, the bulk of
which is shared between the two implementations.  This patch arranges
for the entire thing to be moved into nat/windows-nat.c, with the
differences handled by callbacks.  This patch introduces one more
callback to make this possible.

gdb/ChangeLog
2020-04-08  Tom Tromey  <tromey@adacore.com>

	* windows-nat.c (MS_VC_EXCEPTION): Move to nat/windows-nat.c.
	(handle_exception_result): Move to nat/windows-nat.h.
	(DEBUG_EXCEPTION_SIMPLE): Remove.
	(windows_nat::handle_ms_vc_exception): New function.
	(handle_exception): Move to nat/windows-nat.c.
	(get_windows_debug_event): Update.
	(STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP): Move to
	nat/windows-nat.c.
	* nat/windows-nat.h (handle_ms_vc_exception): Declare.
	(handle_exception_result): Move from windows-nat.c.
	(handle_exception): Declare.
	* nat/windows-nat.c (MS_VC_EXCEPTION, handle_exception)
	(STATUS_WX86_SINGLE_STEP, STATUS_WX86_BREAKPOINT): Move from
	windows-nat.c.

gdbserver/ChangeLog
2020-04-08  Tom Tromey  <tromey@adacore.com>

	* win32-low.c (handle_exception): Remove.
	(windows_nat::handle_ms_vc_exception): New function.
	(get_child_debug_event): Add "continue_status" parameter.
	Update.
	(win32_wait): Update.
This commit is contained in:
Tom Tromey 2020-04-08 14:33:35 -06:00
parent 29de418dee
commit 8d30e39577
6 changed files with 267 additions and 305 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
gdb/ChangeLog
View File

@ -1,3 +1,20 @@
2020-04-08 Tom Tromey <tromey@adacore.com>
* windows-nat.c (MS_VC_EXCEPTION): Move to nat/windows-nat.c.
(handle_exception_result): Move to nat/windows-nat.h.
(DEBUG_EXCEPTION_SIMPLE): Remove.
(windows_nat::handle_ms_vc_exception): New function.
(handle_exception): Move to nat/windows-nat.c.
(get_windows_debug_event): Update.
(STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP): Move to
nat/windows-nat.c.
* nat/windows-nat.h (handle_ms_vc_exception): Declare.
(handle_exception_result): Move from windows-nat.c.
(handle_exception): Declare.
* nat/windows-nat.c (MS_VC_EXCEPTION, handle_exception)
(STATUS_WX86_SINGLE_STEP, STATUS_WX86_BREAKPOINT): Move from
windows-nat.c.
2020-04-08 Tom Tromey <tromey@adacore.com>
* windows-nat.c (exception_count, event_count): Remove.

175
gdb/nat/windows-nat.c
View File

@ -18,6 +18,10 @@
#include "gdbsupport/common-defs.h"
#include "nat/windows-nat.h"
#include "gdbsupport/common-debug.h"
#define STATUS_WX86_BREAKPOINT 0x4000001F
#define STATUS_WX86_SINGLE_STEP 0x4000001E
namespace windows_nat
{
@ -137,4 +141,175 @@ get_image_name (HANDLE h, void *address, int unicode)
return buf;
}
/* The exception thrown by a program to tell the debugger the name of
a thread. The exception record contains an ID of a thread and a
name to give it. This exception has no documented name, but MSDN
dubs it "MS_VC_EXCEPTION" in one code example. */
#define MS_VC_EXCEPTION 0x406d1388
handle_exception_result
handle_exception (struct target_waitstatus *ourstatus, bool debug_exceptions)
{
#define DEBUG_EXCEPTION_SIMPLE(x) if (debug_exceptions) \
debug_printf ("gdb: Target exception %s at %s\n", x, \
host_address_to_string (\
current_event.u.Exception.ExceptionRecord.ExceptionAddress))
EXCEPTION_RECORD *rec = &current_event.u.Exception.ExceptionRecord;
DWORD code = rec->ExceptionCode;
handle_exception_result result = HANDLE_EXCEPTION_HANDLED;
memcpy (&siginfo_er, rec, sizeof siginfo_er);
ourstatus->kind = TARGET_WAITKIND_STOPPED;
/* Record the context of the current thread. */
thread_rec (ptid_t (current_event.dwProcessId, current_event.dwThreadId, 0),
DONT_SUSPEND);
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:
#ifdef __x86_64__
if (ignore_first_breakpoint)
{
/* For WOW64 processes, there are always 2 breakpoint exceptions
on startup, first a BREAKPOINT for the 64bit ntdll.dll,
then a WX86_BREAKPOINT for the 32bit ntdll.dll.
Here we only care about the WX86_BREAKPOINT's. */
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
ignore_first_breakpoint = false;
}
#endif
/* FALLTHROUGH */
case STATUS_WX86_BREAKPOINT:
DEBUG_EXCEPTION_SIMPLE ("EXCEPTION_BREAKPOINT");
ourstatus->value.sig = GDB_SIGNAL_TRAP;
#ifdef _WIN32_WCE
/* Remove the initial breakpoint. */
check_breakpoints ((CORE_ADDR) (long) current_event
.u.Exception.ExceptionRecord.ExceptionAddress);
#endif
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:
case STATUS_WX86_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:
DEBUG_EXCEPTION_SIMPLE ("MS_VC_EXCEPTION");
if (handle_ms_vc_exception (rec))
{
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;
debug_printf ("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;
}
last_sig = ourstatus->value.sig;
return result;
#undef DEBUG_EXCEPTION_SIMPLE
}
}

20
gdb/nat/windows-nat.h
View File

@ -143,6 +143,16 @@ extern void handle_load_dll ();
extern void handle_unload_dll ();
/* Handle MS_VC_EXCEPTION when processing a stop. MS_VC_EXCEPTION is
somewhat undocumented but is used to tell the debugger the name of
a thread.
Return true if the exception was handled; return false otherwise.
This function must be supplied by the embedding application. */
extern bool handle_ms_vc_exception (const EXCEPTION_RECORD *rec);
/* Currently executing process */
extern HANDLE current_process_handle;
@ -205,6 +215,16 @@ extern EXCEPTION_RECORD siginfo_er;
get_image_name. */
extern const char *get_image_name (HANDLE h, void *address, int unicode);
typedef enum
{
HANDLE_EXCEPTION_UNHANDLED = 0,
HANDLE_EXCEPTION_HANDLED,
HANDLE_EXCEPTION_IGNORED
} handle_exception_result;
extern handle_exception_result handle_exception
(struct target_waitstatus *ourstatus, bool debug_exceptions);
}
#endif

220
gdb/windows-nat.c
View File

@ -72,9 +72,6 @@
#include "gdbsupport/gdb_wait.h"
#include "nat/windows-nat.h"
#define STATUS_WX86_BREAKPOINT 0x4000001F
#define STATUS_WX86_SINGLE_STEP 0x4000001E
using namespace windows_nat;
#define AdjustTokenPrivileges dyn_AdjustTokenPrivileges
@ -213,19 +210,6 @@ static int debug_registers_used;
static int windows_initialization_done;
#define DR6_CLEAR_VALUE 0xffff0ff0
/* The exception thrown by a program to tell the debugger the name of
a thread. The exception record contains an ID of a thread and a
name to give it. This exception has no documented name, but MSDN
dubs it "MS_VC_EXCEPTION" in one code example. */
#define MS_VC_EXCEPTION 0x406d1388
typedef enum
{
HANDLE_EXCEPTION_UNHANDLED = 0,
HANDLE_EXCEPTION_HANDLED,
HANDLE_EXCEPTION_IGNORED
} handle_exception_result;
/* The string sent by cygwin when it processes a signal.
FIXME: This should be in a cygwin include file. */
#ifndef _CYGWIN_SIGNAL_STRING
@ -1203,189 +1187,45 @@ display_selectors (const char * args, int from_tty)
}
}
#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))
/* See nat/windows-nat.h. */
static handle_exception_result
handle_exception (struct target_waitstatus *ourstatus)
bool
windows_nat::handle_ms_vc_exception (const EXCEPTION_RECORD *rec)
{
EXCEPTION_RECORD *rec = &current_event.u.Exception.ExceptionRecord;
DWORD code = rec->ExceptionCode;
handle_exception_result result = HANDLE_EXCEPTION_HANDLED;
memcpy (&siginfo_er, rec, sizeof siginfo_er);
ourstatus->kind = TARGET_WAITKIND_STOPPED;
/* Record the context of the current thread. */
thread_rec (ptid_t (current_event.dwProcessId, current_event.dwThreadId, 0),
DONT_SUSPEND);
switch (code)
if (rec->NumberParameters >= 3
&& (rec->ExceptionInformation[0] & 0xffffffff) == 0x1000)
{
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;
DWORD named_thread_id;
windows_thread_info *named_thread;
CORE_ADDR thread_name_target;
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:
#ifdef __x86_64__
if (ignore_first_breakpoint)
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 (ptid_t (current_event.dwProcessId,
named_thread_id, 0),
DONT_INVALIDATE_CONTEXT);
if (named_thread != NULL)
{
/* For WOW64 processes, there are always 2 breakpoint exceptions
on startup, first a BREAKPOINT for the 64bit ntdll.dll,
then a WX86_BREAKPOINT for the 32bit ntdll.dll.
Here we only care about the WX86_BREAKPOINT's. */
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
ignore_first_breakpoint = false;
}
#endif
/* FALLTHROUGH */
case STATUS_WX86_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:
case STATUS_WX86_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;
int thread_name_len;
gdb::unique_xmalloc_ptr<char> thread_name;
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 (ptid_t (current_event.dwProcessId,
named_thread_id, 0),
DONT_INVALIDATE_CONTEXT);
if (named_thread != NULL)
thread_name_len = target_read_string (thread_name_target,
&thread_name, 1025, NULL);
if (thread_name_len > 0)
{
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';
named_thread->name = std::move (thread_name);
}
thread_name.get ()[thread_name_len - 1] = '\0';
named_thread->name = std::move (thread_name);
}
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;
return true;
}
last_sig = ourstatus->value.sig;
return result;
return false;
}
/* Resume thread specified by ID, or all artificially suspended
@ -1876,7 +1716,7 @@ windows_nat_target::get_windows_debug_event (int pid,
"EXCEPTION_DEBUG_EVENT"));
if (saw_create != 1)
break;
switch (handle_exception (ourstatus))
switch (handle_exception (ourstatus, debug_exceptions))
{
case HANDLE_EXCEPTION_UNHANDLED:
default:

8
gdbserver/ChangeLog
View File

@ -1,3 +1,11 @@
2020-04-08 Tom Tromey <tromey@adacore.com>
* win32-low.c (handle_exception): Remove.
(windows_nat::handle_ms_vc_exception): New function.
(get_child_debug_event): Add "continue_status" parameter.
Update.
(win32_wait): Update.
2020-04-08 Tom Tromey <tromey@adacore.com>
* win32-low.c (windows_nat::handle_load_dll): Rename from

132
gdbserver/win32-low.cc
View File

@ -1154,117 +1154,6 @@ windows_nat::handle_unload_dll ()
unloaded_dll (NULL, load_addr);
}
static void
handle_exception (struct target_waitstatus *ourstatus)
{
DWORD code = current_event.u.Exception.ExceptionRecord.ExceptionCode;
memcpy (&siginfo_er, &current_event.u.Exception.ExceptionRecord,
sizeof siginfo_er);
ourstatus->kind = TARGET_WAITKIND_STOPPED;
switch (code)
{
case EXCEPTION_ACCESS_VIOLATION:
OUTMSG2 (("EXCEPTION_ACCESS_VIOLATION"));
ourstatus->value.sig = GDB_SIGNAL_SEGV;
break;
case STATUS_STACK_OVERFLOW:
OUTMSG2 (("STATUS_STACK_OVERFLOW"));
ourstatus->value.sig = GDB_SIGNAL_SEGV;
break;
case STATUS_FLOAT_DENORMAL_OPERAND:
OUTMSG2 (("STATUS_FLOAT_DENORMAL_OPERAND"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
OUTMSG2 (("EXCEPTION_ARRAY_BOUNDS_EXCEEDED"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_FLOAT_INEXACT_RESULT:
OUTMSG2 (("STATUS_FLOAT_INEXACT_RESULT"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_FLOAT_INVALID_OPERATION:
OUTMSG2 (("STATUS_FLOAT_INVALID_OPERATION"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_FLOAT_OVERFLOW:
OUTMSG2 (("STATUS_FLOAT_OVERFLOW"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_FLOAT_STACK_CHECK:
OUTMSG2 (("STATUS_FLOAT_STACK_CHECK"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_FLOAT_UNDERFLOW:
OUTMSG2 (("STATUS_FLOAT_UNDERFLOW"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_FLOAT_DIVIDE_BY_ZERO:
OUTMSG2 (("STATUS_FLOAT_DIVIDE_BY_ZERO"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_INTEGER_DIVIDE_BY_ZERO:
OUTMSG2 (("STATUS_INTEGER_DIVIDE_BY_ZERO"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case STATUS_INTEGER_OVERFLOW:
OUTMSG2 (("STATUS_INTEGER_OVERFLOW"));
ourstatus->value.sig = GDB_SIGNAL_FPE;
break;
case EXCEPTION_BREAKPOINT:
OUTMSG2 (("EXCEPTION_BREAKPOINT"));
ourstatus->value.sig = GDB_SIGNAL_TRAP;
#ifdef _WIN32_WCE
/* Remove the initial breakpoint. */
check_breakpoints ((CORE_ADDR) (long) current_event
.u.Exception.ExceptionRecord.ExceptionAddress);
#endif
break;
case DBG_CONTROL_C:
OUTMSG2 (("DBG_CONTROL_C"));
ourstatus->value.sig = GDB_SIGNAL_INT;
break;
case DBG_CONTROL_BREAK:
OUTMSG2 (("DBG_CONTROL_BREAK"));
ourstatus->value.sig = GDB_SIGNAL_INT;
break;
case EXCEPTION_SINGLE_STEP:
OUTMSG2 (("EXCEPTION_SINGLE_STEP"));
ourstatus->value.sig = GDB_SIGNAL_TRAP;
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
OUTMSG2 (("EXCEPTION_ILLEGAL_INSTRUCTION"));
ourstatus->value.sig = GDB_SIGNAL_ILL;
break;
case EXCEPTION_PRIV_INSTRUCTION:
OUTMSG2 (("EXCEPTION_PRIV_INSTRUCTION"));
ourstatus->value.sig = GDB_SIGNAL_ILL;
break;
case EXCEPTION_NONCONTINUABLE_EXCEPTION:
OUTMSG2 (("EXCEPTION_NONCONTINUABLE_EXCEPTION"));
ourstatus->value.sig = GDB_SIGNAL_ILL;
break;
default:
if (current_event.u.Exception.dwFirstChance)
{
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
return;
}
OUTMSG2 (("gdbserver: unknown target exception 0x%08x at 0x%s",
(unsigned) current_event.u.Exception.ExceptionRecord.ExceptionCode,
phex_nz ((uintptr_t) current_event.u.Exception.ExceptionRecord.
ExceptionAddress, sizeof (uintptr_t))));
ourstatus->value.sig = GDB_SIGNAL_UNKNOWN;
break;
}
OUTMSG2 (("\n"));
last_sig = ourstatus->value.sig;
}
static void
suspend_one_thread (thread_info *thread)
{
@ -1297,15 +1186,25 @@ auto_delete_breakpoint (CORE_ADDR stop_pc)
}
#endif
/* See nat/windows-nat.h. */
bool
windows_nat::handle_ms_vc_exception (const EXCEPTION_RECORD *rec)
{
return false;
}
/* Get the next event from the child. */
static int
get_child_debug_event (struct target_waitstatus *ourstatus)
get_child_debug_event (DWORD *continue_status,
struct target_waitstatus *ourstatus)
{
ptid_t ptid;
last_sig = GDB_SIGNAL_0;
ourstatus->kind = TARGET_WAITKIND_SPURIOUS;
*continue_status = DBG_CONTINUE;
/* Check if GDB sent us an interrupt request. */
check_remote_input_interrupt_request ();
@ -1488,7 +1387,9 @@ get_child_debug_event (struct target_waitstatus *ourstatus)
"for pid=%u tid=%x\n",
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId));
handle_exception (ourstatus);
if (handle_exception (ourstatus, debug_threads)
== HANDLE_EXCEPTION_UNHANDLED)
*continue_status = DBG_EXCEPTION_NOT_HANDLED;
break;
case OUTPUT_DEBUG_STRING_EVENT:
@ -1536,7 +1437,8 @@ win32_process_target::wait (ptid_t ptid, target_waitstatus *ourstatus,
while (1)
{
if (!get_child_debug_event (ourstatus))
DWORD continue_status;
if (!get_child_debug_event (&continue_status, ourstatus))
continue;
switch (ourstatus->kind)
@ -1560,7 +1462,7 @@ win32_process_target::wait (ptid_t ptid, target_waitstatus *ourstatus,
/* fall-through */
case TARGET_WAITKIND_SPURIOUS:
/* do nothing, just continue */
child_continue (DBG_CONTINUE, -1);
child_continue (continue_status, -1);
break;
}
}