mirror of
https://gitlab.uni-freiburg.de/opensourcevdi/spice-common
synced 2025-12-26 22:55:35 +00:00
793e5d0350
We are mostly likely not running as root, so this call will fail. As we are supposed to check its return value as it's declared with warn_unused_result, the current way of using it is wrong, so this commit just removes the call.
136 lines
3.1 KiB
C
136 lines
3.1 KiB
C
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
|
|
/*
|
|
Copyright (C) 2011 Red Hat, Inc.
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
This library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
/*
|
|
* Taken from xserver os/backtrace.c:
|
|
* Copyright (C) 2008 Red Hat, Inc.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
#ifndef __MINGW32__
|
|
#include <sys/wait.h>
|
|
#endif
|
|
|
|
#include "spice_common.h"
|
|
|
|
#define GSTACK_PATH "/usr/bin/gstack"
|
|
|
|
#if HAVE_EXECINFO_H
|
|
#include <execinfo.h>
|
|
|
|
static void spice_backtrace_backtrace(void)
|
|
{
|
|
void *array[100];
|
|
int size;
|
|
|
|
size = backtrace(array, sizeof(array)/sizeof(array[0]));
|
|
backtrace_symbols_fd(array, size, STDERR_FILENO);
|
|
}
|
|
#else
|
|
static void spice_backtrace_backtrace(void)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
/* XXX perhaps gstack can be available in windows but pipe/waitpid isn't,
|
|
* so until it is ported properly just compile it out, we lose the
|
|
* backtrace only. */
|
|
#ifndef __MINGW32__
|
|
static int spice_backtrace_gstack(void)
|
|
{
|
|
pid_t kidpid;
|
|
int pipefd[2];
|
|
|
|
if (pipe(pipefd) != 0) {
|
|
return -1;
|
|
}
|
|
|
|
kidpid = fork();
|
|
|
|
if (kidpid == -1) {
|
|
/* ERROR */
|
|
return -1;
|
|
} else if (kidpid == 0) {
|
|
/* CHILD */
|
|
char parent[16];
|
|
|
|
close(STDIN_FILENO);
|
|
close(STDOUT_FILENO);
|
|
dup2(pipefd[1],STDOUT_FILENO);
|
|
close(STDERR_FILENO);
|
|
|
|
snprintf(parent, sizeof(parent), "%d", getppid());
|
|
execle(GSTACK_PATH, "gstack", parent, NULL, NULL);
|
|
exit(1);
|
|
} else {
|
|
/* PARENT */
|
|
char btline[256];
|
|
int kidstat;
|
|
int bytesread;
|
|
int done = 0;
|
|
|
|
close(pipefd[1]);
|
|
|
|
while (!done) {
|
|
bytesread = read(pipefd[0], btline, sizeof(btline) - 1);
|
|
|
|
if (bytesread > 0) {
|
|
btline[bytesread] = 0;
|
|
fprintf(stderr, "%s", btline);
|
|
}
|
|
else if ((bytesread == 0) ||
|
|
((errno != EINTR) && (errno != EAGAIN))) {
|
|
done = 1;
|
|
}
|
|
}
|
|
close(pipefd[0]);
|
|
waitpid(kidpid, &kidstat, 0);
|
|
if (kidstat != 0)
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
#else
|
|
static int spice_backtrace_gstack(void)
|
|
{
|
|
/* empty failing implementation */
|
|
return -1;
|
|
}
|
|
#endif
|
|
|
|
void spice_backtrace(void)
|
|
{
|
|
int ret = -1;
|
|
|
|
if (!access(GSTACK_PATH, X_OK)) {
|
|
ret = spice_backtrace_gstack();
|
|
}
|
|
if (ret != 0) {
|
|
spice_backtrace_backtrace();
|
|
}
|
|
}
|