-/* $Id: ex.c 5173 2008-01-07 22:10:52Z mquinson $ */
-
/* backtrace_linux - backtrace displaying on linux platform */
/* This file is included by ex.c on need (have execinfo.h, popen & addrline)*/
-/* Copyright (c) 2007 The SimGrid team */
-/* All rights reserved. */
+/* Copyright (c) 2008, 2009, 2010. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
+/* This file is to be included in ex.c, so the following headers are not mandatory, but it's to make sure that eclipse see them too */
+#include "xbt/ex.h"
+#include "xbt/str.h"
+#include "xbt/module.h" /* xbt_binary_name */
+#include "xbt_modinter.h" /* backtrace initialization headers */
+/* end of "useless" inclusions */
+
extern char **environ; /* the environment, as specified by the opengroup */
/* Module creation/destruction: nothing to do on linux */
-void xbt_backtrace_init(void) { }
-void xbt_backtrace_exit(void) { }
+void xbt_backtrace_preinit(void)
+{
+}
+
+void xbt_backtrace_postexit(void)
+{
+}
-void xbt_backtrace_current(xbt_ex_t * e) {
+void xbt_backtrace_current(xbt_ex_t * e)
+{
e->used = backtrace((void **) e->bt, XBT_BACKTRACE_SIZE);
}
-
+
void xbt_ex_setup_backtrace(xbt_ex_t * e)
{
int i;
/* To search for the right executable path when not trivial */
struct stat stat_buf;
char *binary_name = NULL;
-
- xbt_assert0(e && e->used,"Backtrace not setup yet, cannot set it up for display");
-
+
+ xbt_assert0(e
+ && e->used,
+ "Backtrace not setup yet, cannot set it up for display");
+
backtrace_syms = backtrace_symbols(e->bt, e->used);
+ /* ignore first one, which is this xbt_backtrace_current() */
+ e->used--;
+ memmove(backtrace_syms, backtrace_syms + 1, sizeof(char *) * e->used);
addrs = xbt_new(char *, e->used);
-
+
e->bt_strings = NULL;
/* Some arches only have stubs of backtrace, no implementation (hppa comes to mind) */
}
for (i = 0; i < e->used; i++) {
+ char *fgets_res;
DEBUG2("Looking for symbol %d, addr = '%s'", i, addrs[i]);
- fgets(line_func, 1024, pipe);
+ fgets_res = fgets(line_func, 1024, pipe);
+ if (fgets_res == NULL)
+ THROW2(system_error, 0,
+ "Cannot run fgets to look for symbol %d, addr %s", i, addrs[i]);
line_func[strlen(line_func) - 1] = '\0';
- fgets(line_pos, 1024, pipe);
+ fgets_res = fgets(line_pos, 1024, pipe);
+ if (fgets_res == NULL)
+ THROW2(system_error, 0,
+ "Cannot run fgets to look for symbol %d, addr %s", i, addrs[i]);
line_pos[strlen(line_pos) - 1] = '\0';
if (strcmp("??", line_func)) {
continue;
}
- /* Ok, Found the offset of the maps line containing the searched symbol.
+ /* Ok, Found the offset of the maps line containing the searched symbol.
We now need to substract this from the address we got from backtrace.
*/
addrs[i] = bprintf("0x%0*lx", addr_len - 2, addr - offset);
DEBUG2("offset=%#lx new addr=%s", offset, addrs[i]);
- /* Got it. We have our new address. Let's get the library path and we
+ /* Got it. We have our new address. Let's get the library path and we
are set */
p = xbt_strdup(backtrace_syms[i]);
if (p[0] == '[') {
CRITICAL0("Cannot fork addr2line to display the backtrace");
abort();
}
- fgets(line_func, 1024, subpipe);
+ fgets_res = fgets(line_func, 1024, subpipe);
+ if (fgets_res == NULL)
+ THROW1(system_error, 0, "Cannot read result of subcommand %s",
+ subcmd);
line_func[strlen(line_func) - 1] = '\0';
- fgets(line_pos, 1024, subpipe);
+ fgets_res = fgets(line_pos, 1024, subpipe);
+ if (fgets_res == NULL)
+ THROW1(system_error, 0, "Cannot read result of subcommand %s",
+ subcmd);
line_pos[strlen(line_pos) - 1] = '\0';
pclose(subpipe);
free(subcmd);
/* Mask the bottom of the stack */
if (!strncmp("main", line_func, strlen("main")) ||
- !strncmp("xbt_thread_context_wrapper", line_func,
- strlen("xbt_thread_context_wrapper"))) {
+ !strncmp("xbt_thread_context_wrapper", line_func, strlen("xbt_thread_context_wrapper"))||
+ !strncmp("smx_ctx_sysv_wrapper",line_func,strlen("smx_ctx_sysv_wrapper"))) {
int j;
for (j = i + 1; j < e->used; j++)
