Commit 77327b7b authored by Simon McVittie's avatar Simon McVittie

_dbus_disable_crash_handling: Factor out from test-segfault

Signed-off-by: Simon McVittie's avatarSimon McVittie <smcv@collabora.com>
parent 16d2453f
......@@ -52,6 +52,10 @@
#include <dirent.h>
#include <sys/un.h>
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
#ifdef HAVE_SYS_SYSLIMITS_H
#include <sys/syslimits.h>
#endif
......@@ -1583,3 +1587,28 @@ _dbus_daemon_report_stopping (void)
sd_notify (0, "STOPPING=1");
#endif
}
/**
* Try to disable core dumps and similar special crash handling.
*/
void
_dbus_disable_crash_handling (void)
{
#ifdef HAVE_SETRLIMIT
/* No core dumps please, we know we crashed. */
struct rlimit r = { 0, };
getrlimit (RLIMIT_CORE, &r);
r.rlim_cur = 0;
setrlimit (RLIMIT_CORE, &r);
#endif
#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
/* Really, no core dumps please. On Linux, if core_pattern is
* set to a pipe (for abrt/apport/corekeeper/etc.), RLIMIT_CORE of 0
* is ignored (deliberately, so people can debug init(8) and other
* early stuff); but Linux has PR_SET_DUMPABLE, so we can avoid core
* dumps anyway. */
prctl (PR_SET_DUMPABLE, 0, 0, 0, 0);
#endif
}
......@@ -1688,3 +1688,27 @@ _dbus_win_stderr_win_error (const char *app,
fprintf (stderr, "%s: %s: %s\n", app, message, error.message);
dbus_error_free (&error);
}
static int exception_handler (LPEXCEPTION_POINTERS p) _DBUS_GNUC_NORETURN;
static int
exception_handler (LPEXCEPTION_POINTERS p)
{
ExitProcess (0xc0000005);
}
/**
* Try to disable core dumps and similar special crash handling.
*/
void
_dbus_disable_crash_handling (void)
{
/* Disable Windows popup dialog when an app crashes so that app quits
* immediately with error code instead of waiting for user to dismiss
* the dialog. */
DWORD dwMode = SetErrorMode (SEM_NOGPFAULTERRORBOX);
SetErrorMode (dwMode | SEM_NOGPFAULTERRORBOX);
/* Disable "just in time" debugger */
SetUnhandledExceptionFilter ((LPTOP_LEVEL_EXCEPTION_FILTER) &exception_handler);
}
......@@ -732,6 +732,8 @@ void _dbus_combine_tcp_errors (DBusList **sources,
const char *port,
DBusError *dest);
void _dbus_disable_crash_handling (void);
/** @} */
DBUS_END_DECLS
......
......@@ -105,6 +105,9 @@ test_printf_LDADD = $(top_builddir)/dbus/libdbus-internal.la
test_refs_SOURCES = internals/refs.c
test_refs_LDADD = libdbus-testutils.la $(GLIB_LIBS)
test_segfault_SOURCES = test-segfault.c
test_segfault_LDADD = $(top_builddir)/dbus/libdbus-internal.la
test_server_oom_SOURCES = internals/server-oom.c
test_server_oom_LDADD = libdbus-testutils.la $(GLIB_LIBS)
......
......@@ -5,63 +5,14 @@
#include <signal.h>
#endif
#ifdef HAVE_SETRLIMIT
#include <sys/resource.h>
#endif
#ifdef HAVE_SYS_PRCTL_H
#include <sys/prctl.h>
#endif
#ifdef DBUS_WIN
#include <stdio.h>
#include <windows.h>
#include <dbus/dbus-macros.h>
int exception_handler (LPEXCEPTION_POINTERS p) _DBUS_GNUC_NORETURN;
/* Explicit Windows exception handlers needed to supress OS popups */
int
exception_handler(LPEXCEPTION_POINTERS p)
{
fprintf(stderr, "test-segfault: raised fatal exception as intended\n");
ExitProcess(0xc0000005);
}
#endif
#include "dbus/dbus-sysdeps.h"
int
main (int argc, char **argv)
{
char *p;
#ifdef DBUS_WIN
/* Disable Windows popup dialog when an app crashes so that app quits
* immediately with error code instead of waiting for user to dismiss
* the dialog. */
DWORD dwMode = SetErrorMode(SEM_NOGPFAULTERRORBOX);
SetErrorMode(dwMode | SEM_NOGPFAULTERRORBOX);
/* Disable "just in time" debugger */
SetUnhandledExceptionFilter((LPTOP_LEVEL_EXCEPTION_FILTER)&exception_handler);
#endif
#ifdef HAVE_SETRLIMIT
/* No core dumps please, we know we crashed. */
struct rlimit r = { 0, };
getrlimit (RLIMIT_CORE, &r);
r.rlim_cur = 0;
setrlimit (RLIMIT_CORE, &r);
#endif
#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
/* Really, no core dumps please. On Linux, if core_pattern is
* set to a pipe (for abrt/apport/corekeeper/etc.), RLIMIT_CORE of 0
* is ignored (deliberately, so people can debug init(8) and other
* early stuff); but Linux has PR_SET_DUMPABLE, so we can avoid core
* dumps anyway. */
prctl (PR_SET_DUMPABLE, 0, 0, 0, 0);
#endif
_dbus_disable_crash_handling ();
#ifdef HAVE_RAISE
raise (SIGSEGV);
......
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