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print_stacktrace is OS specific

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This commit is contained in:
Gio 2016-01-01 00:45:01 +01:00
parent 7e1b4abd33
commit 78959326b6
1 changed files with 96 additions and 67 deletions
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163
libretroshare/src/util/stacktrace.h
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@ -1,10 +1,32 @@
// stacktrace.h (c) 2008, Timo Bingmann from http://idlebox.net/ /*
// published under the WTFPL v2.0 * stacktrace.h
*
* Copyright (C) 2016 Gioacchino Mazzurco <gio@eigenlab.org>
* Copyright (C) 2008 Timo Bingmann http://idlebox.net/
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License Version 2 as published by the Free Software Foundation.
*
* 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*
*/
#ifndef _STACKTRACE_H_ #ifndef _STACKTRACE_H_
#define _STACKTRACE_H_ #define _STACKTRACE_H_
#include <stdio.h> #include <stdio.h>
#ifndef WINDOWS_SYS
#include <stdlib.h> #include <stdlib.h>
#include <execinfo.h> #include <execinfo.h>
#include <cxxabi.h> #include <cxxabi.h>
@ -12,82 +34,89 @@
/** Print a demangled stack backtrace of the caller function to FILE* out. */ /** Print a demangled stack backtrace of the caller function to FILE* out. */
static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames = 63) static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames = 63)
{ {
fprintf(out, "stack trace:\n"); fprintf(out, "stack trace:\n");
// storage array for stack trace address data // storage array for stack trace address data
void* addrlist[max_frames+1]; void* addrlist[max_frames+1];
// retrieve current stack addresses // retrieve current stack addresses
int addrlen = backtrace(addrlist, sizeof(addrlist) / sizeof(void*)); int addrlen = backtrace(addrlist, sizeof(addrlist) / sizeof(void*));
if (addrlen == 0) { if (addrlen == 0)
fprintf(out, " <empty, possibly corrupt>\n");
return;
}
// resolve addresses into strings containing "filename(function+address)",
// this array must be free()-ed
char** symbollist = backtrace_symbols(addrlist, addrlen);
// allocate string which will be filled with the demangled function name
size_t funcnamesize = 256;
char* funcname = (char*)malloc(funcnamesize);
// iterate over the returned symbol lines. skip the first, it is the
// address of this function.
for (int i = 1; i < addrlen; i++)
{
char *begin_name = 0, *begin_offset = 0, *end_offset = 0;
// find parentheses and +address offset surrounding the mangled name:
// ./module(function+0x15c) [0x8048a6d]
for (char *p = symbollist[i]; *p; ++p)
{ {
if (*p == '(') fprintf(out, " <empty, possibly corrupt>\n");
begin_name = p; return;
else if (*p == '+')
begin_offset = p;
else if (*p == ')' && begin_offset) {
end_offset = p;
break;
}
} }
if (begin_name && begin_offset && end_offset // resolve addresses into strings containing "filename(function+address)",
&& begin_name < begin_offset) // this array must be free()-ed
char** symbollist = backtrace_symbols(addrlist, addrlen);
// allocate string which will be filled with the demangled function name
size_t funcnamesize = 256;
char* funcname = (char*)malloc(funcnamesize);
// iterate over the returned symbol lines. skip the first, it is the
// address of this function.
for (int i = 1; i < addrlen; i++)
{ {
*begin_name++ = '\0'; char *begin_name = 0, *begin_offset = 0, *end_offset = 0;
*begin_offset++ = '\0';
*end_offset = '\0';
// mangled name is now in [begin_name, begin_offset) and caller // find parentheses and +address offset surrounding the mangled name:
// offset in [begin_offset, end_offset). now apply // ./module(function+0x15c) [0x8048a6d]
// __cxa_demangle(): for (char *p = symbollist[i]; *p; ++p)
{
if (*p == '(') begin_name = p;
else if (*p == '+') begin_offset = p;
else if (*p == ')' && begin_offset)
{
end_offset = p;
break;
}
}
int status; if (begin_name && begin_offset && end_offset && begin_name < begin_offset)
char* ret = abi::__cxa_demangle(begin_name, {
funcname, &funcnamesize, &status); *begin_name++ = '\0';
if (status == 0) { *begin_offset++ = '\0';
funcname = ret; // use possibly realloc()-ed string *end_offset = '\0';
fprintf(out, " %s : %s+%s\n",
symbollist[i], funcname, begin_offset); // mangled name is now in [begin_name, begin_offset) and caller
} // offset in [begin_offset, end_offset). now apply
else { // __cxa_demangle():
// demangling failed. Output function name as a C function with
// no arguments. int status;
fprintf(out, " %s : %s()+%s\n", char* ret = abi::__cxa_demangle(begin_name, funcname, &funcnamesize, &status);
symbollist[i], begin_name, begin_offset); if (status == 0)
} {
funcname = ret; // use possibly realloc()-ed string
fprintf(out, " %s : %s+%s\n", symbollist[i], funcname, begin_offset);
}
else
{
// demangling failed. Output function name as a C function with
// no arguments.
fprintf(out, " %s : %s()+%s\n", symbollist[i], begin_name, begin_offset);
}
}
else
{
// couldn't parse the line? print the whole line.
fprintf(out, " %s\n", symbollist[i]);
}
} }
else
{
// couldn't parse the line? print the whole line.
fprintf(out, " %s\n", symbollist[i]);
}
}
free(funcname); free(funcname);
free(symbollist); free(symbollist);
} }
#else // WINDOWS_SYS
static inline void print_stacktrace(FILE *out = stderr, unsigned int max_frames = 63)
{
(void) max_frames;
fprintf(out, "TODO: 2016/01/01 print_stacktrace not implemented yet for WINDOWS_SYS\n");
}
#endif // WINDOWS_SYS
#endif // _STACKTRACE_H_ #endif // _STACKTRACE_H_