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Fix debugging of WOW64 processes 

The new code regarding pending stops only checks for EXCEPTION_BREAKPOINT,
but for WOW64 processes STATUS_WX86_BREAKPOINT is necessary as well.

Also, ignore_first_breakpoint is used now in nat/windows-nat.c as well,
but was not available there.

gdb/ChangeLog:

2020-04-10  Hannes Domani  <ssbssa@yahoo.de>

	* nat/windows-nat.c (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
	Move to...
	* nat/windows-nat.h (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
	... here.
	* windows-nat.c (windows_nat_target::get_windows_debug_event):
	Check for STATUS_WX86_BREAKPOINT.
	(windows_nat_target::wait): Same.
This commit is contained in:
Hannes Domani 2020-04-09 16:33:20 +02:00
parent a5d214978f
commit 13302e956f
4 changed files with 30 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
gdb/ChangeLog
View File

@ -1,3 +1,13 @@
2020-04-10 Hannes Domani <ssbssa@yahoo.de>
* nat/windows-nat.c (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
Move to...
* nat/windows-nat.h (STATUS_WX86_BREAKPOINT, STATUS_WX86_SINGLE_STEP):
... here.
* windows-nat.c (windows_nat_target::get_windows_debug_event):
Check for STATUS_WX86_BREAKPOINT.
(windows_nat_target::wait): Same.
2020-04-10 Tom de Vries <tdevries@suse.de>
PR cli/25808

7
gdb/nat/windows-nat.c
View File

@ -20,9 +20,6 @@
#include "nat/windows-nat.h"
#include "gdbsupport/common-debug.h"
#define STATUS_WX86_BREAKPOINT 0x4000001F
#define STATUS_WX86_SINGLE_STEP 0x4000001E
namespace windows_nat
{
@ -44,6 +41,10 @@ DWORD desired_stop_thread_id = -1;
std::vector<pending_stop> pending_stops;
EXCEPTION_RECORD siginfo_er;
#ifdef __x86_64__
bool ignore_first_breakpoint = false;
#endif
/* Note that 'debug_events' must be locally defined in the relevant
functions. */
#define DEBUG_EVENTS(x) if (debug_events) debug_printf x

8
gdb/nat/windows-nat.h
View File

@ -25,6 +25,9 @@
#include "gdbsupport/gdb_optional.h"
#include "target/waitstatus.h"
#define STATUS_WX86_BREAKPOINT 0x4000001F
#define STATUS_WX86_SINGLE_STEP 0x4000001E
namespace windows_nat
{
@ -202,6 +205,11 @@ extern std::vector<pending_stop> pending_stops;
/* Contents of $_siginfo */
extern EXCEPTION_RECORD siginfo_er;
#ifdef __x86_64__
/* Ignore first breakpoint exception of WOW64 process */
extern bool ignore_first_breakpoint;
#endif
/* Return the name of the DLL referenced by H at ADDRESS. UNICODE
determines what sort of string is read from the inferior. Returns
the name of the DLL, or NULL on error. If a name is returned, it

13
gdb/windows-nat.c
View File

@ -235,7 +235,6 @@ static int saw_create;
static int open_process_used = 0;
#ifdef __x86_64__
static bool wow64_process = false;
static bool ignore_first_breakpoint = false;
#endif
/* User options. */
@ -1721,8 +1720,10 @@ windows_nat_target::get_windows_debug_event (int pid,
thread_id, desired_stop_thread_id));
if (current_event.dwDebugEventCode == EXCEPTION_DEBUG_EVENT
&& (current_event.u.Exception.ExceptionRecord.ExceptionCode
== EXCEPTION_BREAKPOINT)
&& ((current_event.u.Exception.ExceptionRecord.ExceptionCode
== EXCEPTION_BREAKPOINT)
|| (current_event.u.Exception.ExceptionRecord.ExceptionCode
== STATUS_WX86_BREAKPOINT))
&& windows_initialization_done)
{
ptid_t ptid = ptid_t (current_event.dwProcessId, thread_id, 0);
@ -1801,8 +1802,10 @@ windows_nat_target::wait (ptid_t ptid, struct target_waitstatus *ourstatus,
{
current_windows_thread->stopped_at_software_breakpoint = false;
if (current_event.dwDebugEventCode == EXCEPTION_DEBUG_EVENT
&& (current_event.u.Exception.ExceptionRecord.ExceptionCode
== EXCEPTION_BREAKPOINT)
&& ((current_event.u.Exception.ExceptionRecord.ExceptionCode
== EXCEPTION_BREAKPOINT)
|| (current_event.u.Exception.ExceptionRecord.ExceptionCode
== STATUS_WX86_BREAKPOINT))
&& windows_initialization_done)
current_windows_thread->stopped_at_software_breakpoint = true;
}