/* backtrace_linux - backtrace displaying on linux platform */
/* This file is included by ex.cpp on need (have execinfo.h, popen & addrline)*/
-/* Copyright (c) 2008-2016. The SimGrid Team.
- * All rights reserved. */
+/* Copyright (c) 2008-2017. 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. */
#include <xbt/string.hpp>
#include <xbt/backtrace.hpp>
#include "xbt/ex.h"
-#include "src/xbt/ex_interface.h"
#include "xbt/log.h"
#include "xbt/str.h"
#include "xbt/module.h" /* xbt_binary_name */
#include "src/xbt_modinter.h" /* backtrace initialization headers */
-#if HAVE_MC
+#if SIMGRID_HAVE_MC
#define UNW_LOCAL_ONLY
#include <libunwind.h>
#endif
extern char **environ; /* the environment, as specified by the opengroup */
-/* Module creation/destruction: nothing to do on linux */
-void xbt_backtrace_preinit()
-{
-}
-
-void xbt_backtrace_postexit()
-{
-}
-
#include <unwind.h>
struct trace_arg {
- void **array;
- int cnt, size;
+ void** array;
+ int cnt;
+ int size;
};
static _Unwind_Reason_Code
/** @brief reimplementation of glibc backtrace based directly on gcc library, without implicit malloc
*
- * See http://webloria.loria.fr/~quinson/blog/2012/0208/system_programming_fun_in_SimGrid/
+ * See http://people.irisa.fr/Martin.Quinson/blog/2012/0208/system_programming_fun_in_SimGrid/
* for the motivation behind this function
* */
if (binary_name.empty()) {
for (std::size_t i = 0; i < count; i++)
result.push_back(simgrid::xbt::string_printf("%p", loc[i]));
- return std::move(result);
+ return result;
}
// Create the system command for add2line:
XBT_VERB("Fire a first command: '%s'", cmd.c_str());
FILE* pipe = popen(cmd.c_str(), "r");
- if (!pipe) {
+ if (not pipe) {
xbt_die("Cannot fork addr2line to display the backtrace");
}
/* To read the output of addr2line */
- char line_func[1024], line_pos[1024];
+ char line_func[1024];
+ char line_pos[1024];
for (std::size_t i = 0; i < count; i++) {
XBT_DEBUG("Looking for symbol %zd, addr = '%s'", i, addrs[i].c_str());
if (fgets(line_func, 1024, pipe)) {
char maps_buff[512];
long int offset = 0;
- char *p, *p2;
+ char* p;
int found = 0;
/* let's look for the offset of this library in our addressing space */
XBT_DEBUG("addr=%s (as string) =%#lx (as number)",
addrs[i].c_str(), addr);
- while (!found) {
- long int first, last;
+ while (not found) {
+ long int first;
+ long int last;
if (fgets(maps_buff, 512, maps) == nullptr)
break;
free(maps_name);
addrs[i].clear();
- if (!found) {
+ if (not found) {
XBT_VERB("Problem while reading the maps file. Following backtrace will be mangled.");
XBT_DEBUG("No dynamic. Static symbol: %s", backtrace_syms[i]);
result.push_back(simgrid::xbt::string_printf("?? (%s)", backtrace_syms[i]));
free(p);
snprintf(line_func,3, "??");
} else {
- p2 = strrchr(p, '(');
+ char* p2 = strrchr(p, '(');
if (p2)
*p2 = '\0';
p2 = strrchr(p, ' ');
free(p);
XBT_VERB("Fire a new command: '%s'", subcmd);
FILE* subpipe = popen(subcmd, "r");
- if (!subpipe) {
+ if (not subpipe) {
xbt_die("Cannot fork addr2line to display the backtrace");
}
if (fgets(line_func, 1024, subpipe)) {
addrs[i].clear();
/* 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")))
+ if (not strncmp("main", line_func, strlen("main")) ||
+ not strncmp("xbt_thread_context_wrapper", line_func, strlen("xbt_thread_context_wrapper")) ||
+ not strncmp("smx_ctx_sysv_wrapper", line_func, strlen("smx_ctx_sysv_wrapper")))
break;
}
pclose(pipe);
}
}
-#if HAVE_MC
+#if SIMGRID_HAVE_MC
int xbt_libunwind_backtrace(void** bt, int size){
- int i = 0;
- for(i=0; i < size; i++)
+ for (int i = 0; i < size; i++)
bt[i] = nullptr;
- 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){
+ int i;
+ for (i = 0; unw_step(&c) >= 0 && i < size; i++) {
+ unw_word_t ip;
unw_get_reg(&c, UNW_REG_IP, &ip);
bt[i] = (void*)(long)ip;
- i++;
}
return i;