Add a backtrace printing function copied from xserver os/backtrace.c
that uses gstack which seems to be available enough that xserver uses it :)
Used in ASSERT, tested on F15.
---
common/Makefile.am | 2 +
common/backtrace.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++++
common/backtrace.h | 24 +++++++++++++
common/spice_common.h | 2 +
4 files changed, 116 insertions(+), 0 deletions(-)
create mode 100644 common/backtrace.c
create mode 100644 common/backtrace.h
diff --git a/common/Makefile.am b/common/Makefile.am
index e0f4d49..f07f948 100644
--- a/common/Makefile.am
+++ b/common/Makefile.am
@@ -36,6 +36,8 @@ libspice_common_la_SOURCES = \
spice_common.h \
ssl_verify.c \
ssl_verify.h \
+ backtrace.c \
+ backtrace.h \
$(NULL)
if SUPPORT_GL
diff --git a/common/backtrace.c b/common/backtrace.c
new file mode 100644
index 0000000..658b6b0
--- /dev/null
+++ b/common/backtrace.c
@@ -0,0 +1,88 @@
+/* -*- 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 2008 Red Hat, Inc.
+ */
+
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include "common/spice_common.h"
+
+static int 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];
+
+ seteuid(0);
+ close(STDIN_FILENO);
+ close(STDOUT_FILENO);
+ dup2(pipefd[1],STDOUT_FILENO);
+ close(STDERR_FILENO);
+
+ snprintf(parent, sizeof(parent), "%d", getppid());
+ execle("/usr/bin/gstack", "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;
+ red_printf("%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;
+}
+
+void backtrace() {
+ backtrace_gstack(); /* no implementation other then via gstack */
+}
diff --git a/common/backtrace.h b/common/backtrace.h
new file mode 100644
index 0000000..83a54a1
--- /dev/null
+++ b/common/backtrace.h
@@ -0,0 +1,24 @@
+/* -*- 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/>.
+*/
+
+#ifndef BACKTRACE_H
+#define BACKTRACE_H
+
+void backtrace(void);
+
+#endif // BACKTRACE_H
diff --git a/common/spice_common.h b/common/spice_common.h
index bc74486..d58c558 100644
--- a/common/spice_common.h
+++ b/common/spice_common.h
@@ -22,9 +22,11 @@
#include <stdint.h>
#include <time.h>
#include <stdlib.h>
+#include "backtrace.h"
#define ASSERT(x) if (!(x)) { \
printf("%s: ASSERT %s failed\n", __FUNCTION__, #x); \
+ backtrace(); \
abort(); \
}
--
1.7.6
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