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AMReX_BLBackTrace.cpp
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AMReX_BLBackTrace.cpp
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#include <AMReX_BLBackTrace.H>
#include <AMReX_ParallelDescriptor.H>
#include <AMReX_Print.H>
#include <AMReX_VisMF.H>
#include <AMReX_AsyncOut.H>
#include <AMReX.H>
#include <AMReX_Utility.H>
#ifdef AMREX_USE_MPI
#include <AMReX_MPMD.H>
#endif
#ifdef AMREX_TINY_PROFILING
#include <AMReX_TinyProfiler.H>
#endif
#include <iostream>
#include <sstream>
#include <fstream>
#include <cstring>
#include <cstdio>
#include <csignal>
#if !(defined(_MSC_VER) && defined(__CUDACC__))
//MSVC can't pre-processor cfenv with `Zc:preprocessor`
//https://developercommunity.visualstudio.com/content/problem/1271183/zcpreprocessor-e-crashes-when-given.html
#include <cfenv>
#endif
#if defined(AMREX_EXPORT_DYNAMIC) && defined(__APPLE__)
#include <cxxabi.h>
#include <dlfcn.h>
#define AMREX_BACKTRACE_SUPPORTED 1
#elif defined(__linux__)
#define AMREX_BACKTRACE_SUPPORTED 1
#endif
#ifndef _WIN32
#include <execinfo.h>
#include <unistd.h>
#endif
namespace amrex {
std::stack<std::pair<std::string, std::string> > BLBackTrace::bt_stack;
void
BLBackTrace::handler(int s)
{
std::signal(s, SIG_DFL);
AsyncOut::Finalize();
switch (s) {
case SIGSEGV:
amrex::ErrorStream() << "Segfault\n";
break;
case SIGFPE:
amrex::ErrorStream() << "Erroneous arithmetic operation\n";
break;
case SIGTERM:
amrex::ErrorStream() << "SIGTERM\n";
break;
case SIGINT:
amrex::ErrorStream() << "SIGINT\n";
break;
case SIGABRT:
amrex::ErrorStream() << "SIGABRT\n";
break;
}
#if defined(AMREX_BACKTRACE_SUPPORTED) || defined(AMREX_TINY_PROFILING)
std::string errfilename;
{
std::ostringstream ss;
#ifdef AMREX_USE_MPI
if (MPMD::Initialized()) {
ss << "Backtrace.prog" << MPMD::MyProgId() << ".";
} else
#endif
{
ss << "Backtrace.";
}
ss << ParallelDescriptor::MyProc();
#ifdef AMREX_USE_OMP
ss << "." << omp_get_thread_num();
#endif
errfilename = ss.str();
}
if (FILE* p = fopen(errfilename.c_str(), "w")) {
#if defined(AMREX_BACKTRACE_SUPPORTED)
BLBackTrace::print_backtrace_info(p);
#endif
fclose(p);
}
amrex::ErrorStream() << "See " << errfilename << " file for details" << std::endl;
if (!bt_stack.empty()) {
std::ofstream errfile;
errfile.open(errfilename.c_str(), std::ofstream::out | std::ofstream::app);
if (errfile.is_open()) {
errfile << std::endl;
while (!bt_stack.empty()) {
errfile << "== BACKTRACE == " << bt_stack.top().first
<<", " << bt_stack.top().second << "\n";
bt_stack.pop();
}
errfile << std::endl;
}
}
#ifdef AMREX_TINY_PROFILING
{
std::ofstream errfile;
errfile.open(errfilename.c_str(), std::ofstream::out | std::ofstream::app);
if (errfile.is_open()) {
errfile << std::endl;
TinyProfiler::PrintCallStack(errfile);
errfile << std::endl;
}
}
#endif
if (ParallelDescriptor::NProcs() > 1) {
amrex::Sleep(3);
}
#endif
ParallelDescriptor::Abort(s, false);
}
void
BLBackTrace::print_backtrace_info (const std::string& filename)
{
if (FILE* p = fopen(filename.c_str(), "w"))
{
BLBackTrace::print_backtrace_info(p);
fclose(p);
}
else
{
amrex::Print() << "Warning @ BLBackTrace::print_backtrace_info: "
<< filename << " is not a valid output file."
<< std::endl;
}
}
#ifdef AMREX_BACKTRACE_SUPPORTED
namespace {
std::string run_command (std::string const& cmd)
{
std::string r;
if (FILE * ps = popen(cmd.c_str(), "r")) {
char print_buff[512];
while (fgets(print_buff, sizeof(print_buff), ps)) {
r += print_buff;
}
pclose(ps);
}
return r;
}
int file_exists (const char* file)
{
int r = 0;
if (FILE *fp = fopen(file, "r")) {
fclose(fp);
r = 1;
}
return r;
}
}
#endif
void
BLBackTrace::print_backtrace_info (FILE* f)
{
#ifdef AMREX_BACKTRACE_SUPPORTED
const int nbuf = 64;
void *bt_buffer[nbuf];
int nentries = backtrace(bt_buffer, nbuf);
#ifdef __linux__
{
constexpr std::size_t len = 64;
char host_name[len];
host_name[len-1] = '\n';
// The returned buffer may not include '\n', when truncation occurs.
// So we insert one just in case.
const int ret = gethostname(host_name, len-1);
if (ret == 0) {
std::fprintf(f, "Host Name: %s\n", host_name);
}
}
char **strings = backtrace_symbols(bt_buffer, nentries);
if (strings != nullptr) {
int have_eu_addr2line = 0;
int have_addr2line = 0;
std::string eu_cmd;
{
have_eu_addr2line = file_exists("/usr/bin/eu-addr2line");
if (have_eu_addr2line) {
const pid_t pid = getpid();
// cmd = "/usr/bin/eu-addr2line -C -f -i --pretty-print -p "
eu_cmd = "/usr/bin/eu-addr2line -C -f -i -p "
+ std::to_string(pid);
}
}
std::string cmd;
{
have_addr2line = file_exists("/usr/bin/addr2line");
if (have_addr2line) {
cmd = "/usr/bin/addr2line -Cpfie " + amrex::system::exename;
}
}
std::fprintf(f, "=== If no file names and line numbers are shown below, one can run\n");
std::fprintf(f, " addr2line -Cpfie my_exefile my_line_address\n");
std::fprintf(f, " to convert `my_line_address` (e.g., 0x4a6b) into file name and line number.\n");
std::fprintf(f, " Or one can use amrex/Tools/Backtrace/parse_bt.py.\n\n");
std::fprintf(f, "=== Please note that the line number reported by addr2line may not be accurate.\n");
std::fprintf(f, " One can use\n");
std::fprintf(f, " readelf -wl my_exefile | grep my_line_address'\n");
std::fprintf(f, " to find out the offset for that line.\n\n");
for (int i = 0; i < nentries; ++i)
{
std::fprintf(f, "%2d: %s\n", i, strings[i]);
#if !defined(AMREX_USE_OMP) || !defined(__INTEL_COMPILER)
std::string addr2line_result;
bool try_addr2line = false;
if (amrex::system::call_addr2line && have_eu_addr2line) {
if (bt_buffer[i] != nullptr) {
char print_buff[32];
std::snprintf(print_buff,sizeof(print_buff),"%p",bt_buffer[i]);
const std::string full_cmd = eu_cmd + " " + print_buff;
addr2line_result = run_command(full_cmd);
if (addr2line_result.find("??:") != std::string::npos) { // found ??:
try_addr2line = true;
}
}
} else {
try_addr2line = true;
}
if (try_addr2line && amrex::system::call_addr2line && have_addr2line &&
!amrex::system::exename.empty())
{
addr2line_result.clear();
const std::string line = strings[i];
std::size_t found_libc = line.find("libc.so");
if (found_libc == std::string::npos) {
std::string addr;
{
std::size_t found1 = line.rfind('(');
std::size_t found2 = line.rfind(')');
std::size_t found3 = line.rfind('+');
if (found1 != std::string::npos && found2 != std::string::npos && found3 != std::string::npos) {
if (found1 < found3 && found3 < found2) {
addr = line.substr(found3+1, found2-found3-1);
}
}
}
if (!addr.empty()) {
std::string full_cmd = cmd;
full_cmd.append(" ").append(addr);
addr2line_result = run_command(full_cmd);
if (addr2line_result.find('?') != std::string::npos) {
addr2line_result.clear();
}
}
if (addr2line_result.empty()) {
char print_buff[32];
std::snprintf(print_buff,sizeof(print_buff),"%p",bt_buffer[i]);
std::string full_cmd = cmd;
full_cmd.append(" ").append(print_buff);
addr2line_result = run_command(full_cmd);
}
}
}
if (!addr2line_result.empty()) {
std::fprintf(f, " %s", addr2line_result.c_str());
}
#endif
std::fprintf(f, "\n");
}
std::free(strings);
}
#elif defined(AMREX_BACKTRACE_SUPPORTED) && defined(__APPLE__)
const pid_t pid = getpid();
const std::string cmd = "/usr/bin/atos -p " + std::to_string(pid);
const int have_atos = file_exists("/usr/bin/atos");
for (int i = 0; i < nentries; ++i) {
Dl_info info;
if (dladdr(bt_buffer[i], &info))
{
std::string line;
if (amrex::system::call_addr2line && have_atos) {
char print_buff[32];
std::snprintf(print_buff,sizeof(print_buff),"%p",bt_buffer[i]);
const std::string full_cmd = cmd + " " + print_buff;
line = run_command(full_cmd);
}
if (line.empty()) {
int status;
char * demangled_name = abi::__cxa_demangle(info.dli_sname, nullptr, 0, &status);
if (status == 0) {
line += demangled_name;
} else {
line += info.dli_fname;
}
line += '\n';
std::free(demangled_name);
}
std::fprintf(f, "%2d: %s\n", i, line.c_str());
}
}
#endif
#else
amrex::ignore_unused(f);
#endif
}
BLBTer::BLBTer(const std::string& s, const char* file, int line)
{
std::ostringstream ss;
ss << "Line " << line << ", File " << file;
line_file = ss.str();
#ifdef AMREX_USE_OMP
if (omp_in_parallel()) {
std::ostringstream ss0;
ss0 << "Proc. " << ParallelDescriptor::MyProc()
<< ", Thread " << omp_get_thread_num()
<< ": \"" << s << "\"";
BLBackTrace::bt_stack.push(std::make_pair(ss0.str(), line_file));
}
else {
#pragma omp parallel
{
std::ostringstream ss0;
ss0 << "Proc. " << ParallelDescriptor::MyProc()
<< ", Master Thread"
<< ": \"" << s << "\"";
BLBackTrace::bt_stack.push(std::make_pair(ss0.str(), line_file));
}
}
#else
std::ostringstream ss0;
ss0 << "Proc. " << ParallelDescriptor::MyProc()
<< ": \"" << s << "\"";
BLBackTrace::bt_stack.push(std::make_pair(ss0.str(), line_file));
#endif
}
BLBTer::~BLBTer()
{
#ifdef AMREX_USE_OMP
if (omp_in_parallel()) {
pop_bt_stack();
}
else {
#pragma omp parallel
{
pop_bt_stack();
}
}
#else
pop_bt_stack();
#endif
}
void
BLBTer::pop_bt_stack()
{
if (!BLBackTrace::bt_stack.empty()) {
if (BLBackTrace::bt_stack.top().second == line_file) {
BLBackTrace::bt_stack.pop();
}
}
}
}