/* backtrace_linux - backtrace displaying on linux platform */
-/* This file is included by ex.c on need (have execinfo.h, popen & addrline)*/
+/* This file is included by ex.cpp on need (have execinfo.h, popen & addrline)*/
-/* Copyright (c) 2008, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2008-2015. 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 <unistd.h>
+#include <execinfo.h>
+#include <sys/stat.h>
+
+/* This file is to be included in ex.cpp, so the following headers are not mandatory, but it's to make sure that eclipse see them too */
#include "xbt/ex.h"
+#include "xbt/log.h"
#include "xbt/str.h"
#include "xbt/module.h" /* xbt_binary_name */
-#include "xbt_modinter.h" /* backtrace initialization headers */
+#include "src/xbt_modinter.h" /* backtrace initialization headers */
+#if HAVE_MC
+#define UNW_LOCAL_ONLY
+#include <libunwind.h>
+#endif
/* end of "useless" inclusions */
extern char **environ; /* the environment, as specified by the opengroup */
static _Unwind_Reason_Code
backtrace_helper (struct _Unwind_Context *ctx, void *a)
{
- struct trace_arg *arg = a;
+ struct trace_arg *arg = (struct trace_arg *) a;
/* We are first called with address in the __backtrace function.
Skip it. */
* */
int xbt_backtrace_no_malloc(void **array, int size) {
-
int i = 0;
for(i=0; i < size; i++)
array[i] = NULL;
- struct trace_arg arg = { .array = array, .size = size, .cnt = -1 };
+ struct trace_arg arg;
+ arg .array = array;
+ arg.size = size;
+ arg.cnt = -1;
if (size >= 1)
_Unwind_Backtrace(backtrace_helper, &arg);
void xbt_backtrace_current(xbt_ex_t * e)
{
- e->used = backtrace((void **) e->bt, XBT_BACKTRACE_SIZE);
- if (e->used == 0) {
+ void* bt[XBT_BACKTRACE_SIZE];
+ std::size_t used = backtrace((void **) bt, XBT_BACKTRACE_SIZE);
+ e->bt.assign(bt, bt + used);
+ if (used == 0) {
fprintf(stderr, "The backtrace() function failed, which probably means that the memory is exhausted. Here is a crude dump of the exception that I was trying to build:");
- fprintf(stderr, "%s:%s(%d) [%s:%d] %s", e->host,e->procname,e->pid, e->file,e->line,e->msg);
+ fprintf(stderr, "%s(%d) [%s:%d] %s",
+ e->procname.c_str(), e->pid, e->file, e->line, e->what());
fprintf(stderr, "Bailing out now since there is nothing I can do without a decent amount of memory. Please go fix the memleaks\n");
exit(1);
}
}
-
void xbt_ex_setup_backtrace(xbt_ex_t * e) //FIXME: This code could be greatly improved/simplifyied with http://cairo.sourcearchive.com/documentation/1.9.4/backtrace-symbols_8c-source.html
{
- int i;
-
/* to get the backtrace from the libc */
char **backtrace_syms;
xbt_assert(e, "Backtrace not setup yet, cannot set it up for display");
- e->bt_strings = NULL;
+ e->bt_strings.clear();
- if (!xbt_binary_name) /* no binary name, nothing to do */
+ if (xbt_binary_name == NULL) /* no binary name, nothing to do */
return;
- if (e->used <= 1)
+ if (e->bt.empty())
return;
/* ignore first one, which is xbt_backtrace_current() */
- e->used--;
- memmove(e->bt, e->bt + 1, (sizeof *e->bt) * e->used);
+ e->bt.erase(e->bt.begin());
- backtrace_syms = backtrace_symbols(e->bt, e->used);
+ backtrace_syms = backtrace_symbols(e->bt.data(), e->bt.size());
/* build the commandline */
if (stat(xbt_binary_name, &stat_buf)) {
/* Damn. binary not in current dir. We'll have to dig the PATH to find it */
- for (i = 0; environ[i]; i++) {
+ for (std::size_t i = 0; environ[i]; i++) {
if (!strncmp("PATH=", environ[i], 5)) {
xbt_dynar_t path = xbt_str_split(environ[i] + 5, ":");
unsigned int cpt;
binary_name = bprintf("%s/%s", data, xbt_binary_name);
if (!stat(binary_name, &stat_buf)) {
/* Found. */
- XBT_DEBUG("Looked in the PATH for the binary. Found %s",
- binary_name);
+ XBT_DEBUG("Looked in the PATH for the binary. Found %s", binary_name);
break;
}
}
xbt_dynar_free(&path);
if (stat(binary_name, &stat_buf)) {
/* not found */
- e->used = 1;
- e->bt_strings = xbt_new(char *, 1);
-
- e->bt_strings[0] =
- bprintf("(binary '%s' not found the path)", xbt_binary_name);
+ char* str = bprintf("(binary '%s' not found in the PATH)", xbt_binary_name);
+ e->bt_strings = { str };
+ free(str);
free(backtrace_syms);
return;
}
} else {
binary_name = xbt_strdup(xbt_binary_name);
}
- cmd = curr =
- xbt_new(char,
- strlen(ADDR2LINE) + 25 + strlen(binary_name) + 32 * e->used);
+ int strsize = strlen(ADDR2LINE) + 25 + strlen(binary_name) + 32 * e->bt_strings.size();
+ cmd = curr = xbt_new(char, strsize);
- curr += sprintf(curr, "%s -f -e %s ", ADDR2LINE, binary_name);
+ curr += snprintf(curr,strsize, "%s -f -e %s ", ADDR2LINE, binary_name);
free(binary_name);
- addrs = xbt_new(char *, e->used);
- for (i = 0; i < e->used; i++) {
+ addrs = xbt_new(char *, e->bt.size());
+ for (std::size_t i = 0; i < e->bt.size(); i++) {
char *p;
/* retrieve this address */
- XBT_DEBUG("Retrieving address number %d from '%s'", i, backtrace_syms[i]);
+ XBT_DEBUG("Retrieving address number %zd from '%s'", i, backtrace_syms[i]);
snprintf(buff, 256, "%s", strchr(backtrace_syms[i], '[') + 1);
p = strchr(buff, ']');
*p = '\0';
addrs[i] = xbt_strdup(buff);
else
addrs[i] = xbt_strdup("0x0");
- XBT_DEBUG("Set up a new address: %d, '%s'(%p)", i, addrs[i], addrs[i]);
+ XBT_DEBUG("Set up a new address: %zd, '%s'(%p)", i, addrs[i], addrs[i]);
/* Add it to the command line args */
- curr += sprintf(curr, "%s ", addrs[i]);
+ curr += snprintf(curr,strsize, "%s ", addrs[i]);
}
addr_len = strlen(addrs[0]);
/* parse the output and build a new backtrace */
- e->bt_strings = xbt_new(char *, e->used);
+ e->bt_strings.resize(e->bt.size());
XBT_VERB("Fire a first command: '%s'", cmd);
pipe = popen(cmd, "r");
xbt_die("Cannot fork addr2line to display the backtrace");
}
- for (i = 0; i < e->used; i++) {
- char *fgets_res;
- XBT_DEBUG("Looking for symbol %d, addr = '%s'", i, addrs[i]);
- fgets_res = fgets(line_func, 1024, pipe);
- if (fgets_res == NULL)
- THROWF(system_error, 0,
- "Cannot run fgets to look for symbol %d, addr %s", i,
- addrs[i]);
- line_func[strlen(line_func) - 1] = '\0';
- fgets_res = fgets(line_pos, 1024, pipe);
- if (fgets_res == NULL)
- THROWF(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)) {
+ for (std::size_t i = 0; i < e->bt.size(); i++) {
+ XBT_DEBUG("Looking for symbol %zd, addr = '%s'", i, addrs[i]);
+ if (fgets(line_func, 1024, pipe)) {
+ line_func[strlen(line_func) - 1] = '\0';
+ } else {
+ XBT_VERB("Cannot run fgets to look for symbol %zd, addr %s", i, addrs[i]);
+ strncpy(line_func, "???",3);
+ }
+ if (fgets(line_pos, 1024, pipe)) {
+ line_pos[strlen(line_pos) - 1] = '\0';
+ } else {
+ XBT_VERB("Cannot run fgets to look for symbol %zd, addr %s", i, addrs[i]);
+ strncpy(line_pos, backtrace_syms[i],1024);
+ }
+
+ if (strcmp("??", line_func) != 0) {
XBT_DEBUG("Found static symbol %s() at %s", line_func, line_pos);
- e->bt_strings[i] =
- bprintf("** In %s() at %s", line_func, line_pos);
+ char* s = bprintf("** In %s() at %s", line_func, line_pos);
+ e->bt_strings[i] = s;
+ free(s);
} else {
/* Damn. The symbol is in a dynamic library. Let's get wild */
char *maps_name;
addr = strtol(addrs[i], &p, 16);
if (*p != '\0') {
- XBT_CRITICAL("Cannot parse backtrace address '%s' (addr=%#lx)",
- addrs[i], addr);
+ XBT_CRITICAL("Cannot parse backtrace address '%s' (addr=%#lx)", addrs[i], addr);
}
XBT_DEBUG("addr=%s (as string) =%#lx (as number)", addrs[i], addr);
}
if (found) {
XBT_DEBUG("%#lx in [%#lx-%#lx]", addr, first, last);
- XBT_DEBUG
- ("Symbol found, map lines not further displayed (even if looking for next ones)");
+ XBT_DEBUG("Symbol found, map lines not further displayed (even if looking for next ones)");
}
}
fclose(maps);
free(addrs[i]);
if (!found) {
- XBT_VERB
- ("Problem while reading the maps file. Following backtrace will be mangled.");
+ XBT_VERB("Problem while reading the maps file. Following backtrace will be mangled.");
XBT_DEBUG("No dynamic. Static symbol: %s", backtrace_syms[i]);
- e->bt_strings[i] = bprintf("** In ?? (%s)", backtrace_syms[i]);
+ char* s = bprintf("** In ?? (%s)", backtrace_syms[i]);
+ e->bt_strings[i] = s;
+ free(s);
continue;
}
addrs[i] = bprintf("0x%0*lx", addr_len - 2, addr - offset);
XBT_DEBUG("offset=%#lx new addr=%s", offset, addrs[i]);
- /* Got it. We have our new address. Let's get the library path and we
- are set */
+ /* 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] == '[') {
/* library path not displayed in the map file either... */
free(p);
- sprintf(line_func, "??");
+ snprintf(line_func,3, "??");
} else {
p2 = strrchr(p, '(');
if (p2)
if (!subpipe) {
xbt_die("Cannot fork addr2line to display the backtrace");
}
- fgets_res = fgets(line_func, 1024, subpipe);
- if (fgets_res == NULL)
- THROWF(system_error, 0, "Cannot read result of subcommand %s",
- subcmd);
- line_func[strlen(line_func) - 1] = '\0';
- fgets_res = fgets(line_pos, 1024, subpipe);
- if (fgets_res == NULL)
- THROWF(system_error, 0, "Cannot read result of subcommand %s",
- subcmd);
- line_pos[strlen(line_pos) - 1] = '\0';
+ if (fgets(line_func, 1024, subpipe)) {
+ line_func[strlen(line_func) - 1] = '\0';
+ } else {
+ XBT_VERB("Cannot read result of subcommand %s", subcmd);
+ strncpy(line_func, "???",3);
+ }
+ if (fgets(line_pos, 1024, subpipe)) {
+ line_pos[strlen(line_pos) - 1] = '\0';
+ } else {
+ XBT_VERB("Cannot read result of subcommand %s", subcmd);
+ strncpy(line_pos, backtrace_syms[i],1024);
+ }
pclose(subpipe);
free(subcmd);
}
/* check whether the trick worked */
if (strcmp("??", line_func)) {
XBT_DEBUG("Found dynamic symbol %s() at %s", line_func, line_pos);
- e->bt_strings[i] =
- bprintf("** In %s() at %s", line_func, line_pos);
+ char* s = bprintf("** In %s() at %s", line_func, line_pos);
+ e->bt_strings[i] = s;
+ free(s);
} else {
/* damn, nothing to do here. Let's print the raw address */
- XBT_DEBUG("Dynamic symbol not found. Raw address = %s",
- backtrace_syms[i]);
- e->bt_strings[i] = bprintf("** In ?? at %s", backtrace_syms[i]);
+ XBT_DEBUG("Dynamic symbol not found. Raw address = %s", backtrace_syms[i]);
+ char* s = bprintf("** In ?? at %s", backtrace_syms[i]);
+ e->bt_strings[i] = s;
+ free(s);
}
-
}
free(addrs[i]);
/* 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("smx_ctx_sysv_wrapper", line_func,
- strlen("smx_ctx_sysv_wrapper"))) {
- int j;
+ !strncmp("xbt_thread_context_wrapper", line_func, strlen("xbt_thread_context_wrapper"))
+ || !strncmp("smx_ctx_sysv_wrapper", line_func, strlen("smx_ctx_sysv_wrapper"))) {
- for (j = i + 1; j < e->used; j++)
+ for (std::size_t j = i + 1; j < e->bt.size(); j++)
free(addrs[j]);
- e->used = i + 1;
if (!strncmp
- ("xbt_thread_context_wrapper", line_func,
- strlen("xbt_thread_context_wrapper"))) {
- free(e->bt_strings[i]);
- e->bt_strings[i] = xbt_strdup("** (in a separate thread)");
+ ("xbt_thread_context_wrapper", line_func, strlen("xbt_thread_context_wrapper"))) {
+ e->bt_strings.push_back("** (in a separate thread)");
+ } else {
+ e->bt_strings.push_back("");
}
- }
-
+ }
}
pclose(pipe);
free(addrs);
free(backtrace_syms);
free(cmd);
}
+
+#if HAVE_MC
+int xbt_libunwind_backtrace(void* bt[XBT_BACKTRACE_SIZE], int size){
+ int i = 0;
+ for(i=0; i < size; i++)
+ bt[i] = NULL;
+
+ i=0;
+
+ unw_cursor_t c;
+ unw_context_t uc;
+
+ unw_getcontext (&uc);
+ unw_init_local (&c, &uc);
+
+ unw_word_t ip;
+
+ unw_step(&c);
+
+ while(unw_step(&c) >= 0 && i < size){
+ unw_get_reg(&c, UNW_REG_IP, &ip);
+ bt[i] = (void*)(long)ip;
+ i++;
+ }
+
+ return i;
+}
+#endif
