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winedbg: Set auto attach event after processing the first exception.

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On Windows, the process is broken into by ordering an actual debug
break execution in a new thread. We need to process this event before
continuing exception handling in debuggee to avoid race.

Signed-off-by: Jacek Caban <jacek@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Jacek Caban 2019-07-02 18:02:30 +02:00 committed by Alexandre Julliard
parent 136a0ac49b
commit 1bb98982d6
3 changed files with 15 additions and 13 deletions
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4
programs/winedbg/debugger.h
View File

@ -235,8 +235,8 @@ struct dbg_process
const WCHAR* imageName;
struct list threads;
struct backend_cpu* be_cpu;
BOOL continue_on_first_exception : 1,
active_debuggee : 1;
HANDLE event_on_first_exception;
BOOL active_debuggee;
struct dbg_breakpoint bp[MAX_BREAKPOINTS];
unsigned next_bp;
struct dbg_delayed_bp* delayed_bp;

14
programs/winedbg/tgt_active.c
View File

@ -334,9 +334,11 @@ static unsigned dbg_handle_debug_event(DEBUG_EVENT* de)
de->dwProcessId, de->dwThreadId,
de->u.Exception.ExceptionRecord.ExceptionCode);
if (dbg_curr_process->continue_on_first_exception)
if (dbg_curr_process->event_on_first_exception)
{
dbg_curr_process->continue_on_first_exception = FALSE;
SetEvent(dbg_curr_process->event_on_first_exception);
CloseHandle(dbg_curr_process->event_on_first_exception);
dbg_curr_process->event_on_first_exception = NULL;
if (!DBG_IVAR(BreakOnAttach)) break;
}
if (dbg_fetch_context())
@ -788,13 +790,7 @@ enum dbg_start dbg_active_attach(int argc, char* argv[])
SetEvent((HANDLE)evt);
return start_error_init;
}
dbg_curr_process->continue_on_first_exception = TRUE;
if (!SetEvent((HANDLE)evt))
{
WINE_ERR("Invalid event handle: %lx\n", evt);
return start_error_init;
}
CloseHandle((HANDLE)evt);
dbg_curr_process->event_on_first_exception = (HANDLE)evt;
}
else return start_error_parse;

10
programs/winedbg/winedbg.c
View File

@ -312,7 +312,7 @@ struct dbg_process* dbg_add_process(const struct be_process_io* pio, DWORD pid,
p->pio_data = NULL;
p->imageName = NULL;
list_init(&p->threads);
p->continue_on_first_exception = FALSE;
p->event_on_first_exception = NULL;
p->active_debuggee = FALSE;
p->next_bp = 1; /* breakpoint 0 is reserved for step-over */
memset(p->bp, 0, sizeof(p->bp));
@ -372,6 +372,7 @@ void dbg_del_process(struct dbg_process* p)
source_free_files(p);
list_remove(&p->entry);
if (p == dbg_curr_process) dbg_curr_process = NULL;
if (p->event_on_first_exception) CloseHandle(p->event_on_first_exception);
HeapFree(GetProcessHeap(), 0, (char*)p->imageName);
HeapFree(GetProcessHeap(), 0, p);
}
@ -559,7 +560,12 @@ BOOL dbg_interrupt_debuggee(void)
p = LIST_ENTRY(list_head(&dbg_process_list), struct dbg_process, entry);
if (list_next(&dbg_process_list, &p->entry)) dbg_printf("Ctrl-C: only stopping the first process\n");
else dbg_printf("Ctrl-C: stopping debuggee\n");
p->continue_on_first_exception = FALSE;
if (p->event_on_first_exception)
{
SetEvent(p->event_on_first_exception);
CloseHandle(p->event_on_first_exception);
p->event_on_first_exception = NULL;
}
return DebugBreakProcess(p->handle);
}