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Register signal handlers to print stack trace

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This commit is contained in:
Matthias Hochsteger 2019-10-01 16:30:41 +02:00
parent b7c8f76765
commit 9f7b56fd1f
1 changed files with 33 additions and 7 deletions
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40
libsrc/core/exception.cpp
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@ -13,6 +13,7 @@
#include <array> #include <array>
#include <memory> #include <memory>
#include <cxxabi.h> #include <cxxabi.h>
#include <signal.h>
namespace ngcore namespace ngcore
{ {
@ -39,6 +40,8 @@ namespace ngcore
// then use `add42line` command line tool to map function address + offset to line in source code // then use `add42line` command line tool to map function address + offset to line in source code
static std::string TranslateBacktrace( std::string s, std::string libname ) static std::string TranslateBacktrace( std::string s, std::string libname )
{ {
// example line
// 1 libngcore.dylib 0x000000010ddb298c _ZL21ngcore_signal_handleri + 316
constexpr char reset_shell[] = "\033[0m"; constexpr char reset_shell[] = "\033[0m";
constexpr char green[] = "\033[32m"; constexpr char green[] = "\033[32m";
constexpr char yellow[] = "\033[33m"; constexpr char yellow[] = "\033[33m";
@ -54,14 +57,8 @@ namespace ngcore
if(!funcname.empty() && !libname.empty()) if(!funcname.empty() && !libname.empty())
{ {
std::array<char, 10240> buffer;
int status;
size_t size = buffer.size();
abi::__cxa_demangle(funcname.c_str(), buffer.data(), &size, &status);
out << "in " << yellow << buffer.data() << reset_shell;
std::string nm_command = "nm " + libname + " | grep \"" + funcname + "$\" | cut -f 1 -d ' '"; std::string nm_command = "nm " + libname + " | grep \"" + funcname + "$\" | cut -f 1 -d ' '";
std::output; std::string output;
auto exit_code = exec(nm_command, output); auto exit_code = exec(nm_command, output);
auto fptr = std::strtoul(output.c_str(), 0, 16); auto fptr = std::strtoul(output.c_str(), 0, 16);
if(fptr == 0) if(fptr == 0)
@ -138,6 +135,7 @@ namespace ngcore
std::string GetBackTrace() std::string GetBackTrace()
{ {
std::cerr << "Collecting backtrace..." << std::endl;
std::stringstream result; std::stringstream result;
void *bt[1024]; void *bt[1024];
int bt_size; int bt_size;
@ -159,6 +157,34 @@ namespace ngcore
} // namespace ngcore } // namespace ngcore
static void ngcore_signal_handler(int sig)
{
switch(sig)
{
case SIGABRT:
std::cerr << "Caught SIGABRT: usually caused by abort() or assert()" << std::endl;
break;
case SIGILL:
std::cerr << "Caught SIGILL: illegal instruction" << std::endl;
break;
case SIGSEGV:
std::cerr << "Caught SIGSEGV: segmentation fault" << std::endl;
break;
}
std::cerr << ngcore::GetBackTrace() << std::endl;
exit(1);
}
// register signal handler when library is loaded
static bool dummy = []()
{
signal(SIGABRT, ngcore_signal_handler);
signal(SIGILL, ngcore_signal_handler);
signal(SIGSEGV, ngcore_signal_handler);
return true;
}();
#else // __GNUC__ #else // __GNUC__
namespace ngcore namespace ngcore