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/*
* Copyright (C) 2006 Thomas Sondergaard All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "gltrace_support.h"
#include <assert.h>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <execinfo.h>
#include <cxxabi.h>
#include <sys/time.h>
namespace {
const char *
demangle (const char * mangled) throw()
{
static char buf[4096];
int status;
unsigned int length = sizeof(buf)-1;
memset (buf, 0, sizeof(buf));
if (!mangled)
return 0;
char * demangled = __cxxabiv1::__cxa_demangle(mangled,
buf,
&length,
&status);
if (demangled && !status)
return demangled;
else
return mangled;
}
void
printStackTrace (void **stackframes,
int stackframe_size,
std::ostream & out )
{
char **strings = 0;
std::stringstream ss;
// this might actually fail if memory is tight or we are in a
// signal handler
strings = backtrace_symbols (stackframes, stackframe_size);
ss << "Backtrace :";
if (stackframe_size == gltrace::MAX_STACKFRAMES)
ss << "(possibly incomplete maximal number of frames exceeded):" << std::endl;
else
ss << std::endl;
out << ss.str();
// the first frame is the constructor of the exception
// the last frame always seem to be bogus?
for (int i = 0; strings && i < stackframe_size-1; ++i) {
char libname[257], funcname[2049];
unsigned int address=0, funcoffset = 0x0;
memset (libname,0,sizeof(libname));
memset (funcname,0,sizeof(funcname));
strcpy (funcname,"??");
strcpy (libname, "??");
int scanned = sscanf (strings[i], "%256[^(] ( %2048[^+] + %x ) [ %x ]",
libname,
funcname,
&funcoffset,
&address);
/* ok, so no function was mentioned in the backtrace */
if (scanned < 4) {
scanned = sscanf (strings[i], "%256[^([] [ %x ]",
libname,
&address);
}
if (funcname[0] == '_') {
const char * demangled;
if ((demangled = demangle(funcname) ) != funcname) {
strncpy (funcname, demangled, sizeof(funcname)-1);
}
}
else
strcat (funcname," ()");
out << "\t#" << i << std::hex << " 0x" << address << " in " << funcname
<< " at 0x" << funcoffset << " (from " << libname << ")" << std::endl;
}
free (strings);
}
} // anon namespace
namespace gltrace {
std::string getStackTrace(int count, int first) {
++first;
std::stringstream ss;
const int BA_MAX = 1000;
assert(count + first <= BA_MAX);
void *ba[BA_MAX];
int n = backtrace(ba, count+first);
printStackTrace( &ba[first], n-first, ss);
return ss.str();
}
std::ostream &timeNow(std::ostream &os) {
struct timeval now;
struct tm t;
static char *months[12] =
{
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
gettimeofday (&now, 0);
localtime_r ((time_t*) &now.tv_sec, &t);
os
<< months[t.tm_mon] << " "
<< std::setw(2) << t.tm_mday << " "
<< std::setw(2) << t.tm_hour << ":"
<< std::setw(2) << t.tm_min << ":"
<< std::setw(2) << t.tm_sec << "."
<< std::setw(3) << now.tv_usec/1000;
return os;
}
logstream::logstream(const char *filename) {
if (!filename)
init(std::cerr.rdbuf());
else {
file_os.reset(new std::ofstream(filename));
if (file_os->good())
init(file_os->rdbuf());
else {
std::cerr << "ERROR: gltrace: Failed to open '" << filename
<< "' for writing. Falling back to stderr." << std::endl;
init(std::cerr.rdbuf());
}
}
*this << std::setfill('0'); // setw used in timeNow
}
Config::Config() :
logCalls(true),
checkErrors(true),
logTime(true),
log(getenv("GLTRACE_LOGFILE")) {
if (const char *v = getenv("GLTRACE_LOG_CALLS"))
logCalls = strncmp("1", v, 1) == 0;
if (const char *v = getenv("GLTRACE_CHECK_ERRORS"))
checkErrors = strncmp("1", v, 1) == 0;
if (const char *v = getenv("GLTRACE_LOG_TIME"))
logTime = strncmp("1", v, 1) == 0;
}
// *The* config
Config config;
} // namespace gltrace
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