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Support JIT debugging on MS-Windows

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gdb/ChangeLog:
2016-06-30  Руслан Ижбулатов  <lrn1986@gmail.com>

	PR gdb/14529
	* windows-nat.c (signal_event_command): New command 'signal-event'
	for W32 JIT debug support.
	* NEWS: Add an entry about the new 'signal-event' command.

gdb/doc/ChangeLog:
2016-06-30  Руслан Ижбулатов  <lrn1986@gmail.com>

	* gdb.texinfo (Cygwin Native): Document the new 'signal-event'
	command.
This commit is contained in:
Руслан Ижбулатов
2016-07-23 11:38:03 +03:00
committed by Eli Zaretskii
parent cac709756b
commit 463888ab6b
5 changed files with 76 additions and 0 deletions
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27
gdb/windows-nat.c
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@ -56,6 +56,7 @@
#include "solist.h"
#include "solib.h"
#include "xml-support.h"
#include "inttypes.h"
#include "i386-tdep.h"
#include "i387-tdep.h"
@ -825,6 +826,25 @@ windows_clear_solib (void)
solib_end = &solib_start;
}
static void
signal_event_command (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. */
@ -2550,6 +2570,13 @@ _initialize_windows_nat (void)
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."), _("\