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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "System/Platform/CrashHandler.h"
#if defined(__APPLE__)
// ### Unix(compliant) CrashHandler START
#include <AvailabilityMacros.h>
//! Same as Linux
#include "System/Platform/Linux/CrashHandler.cpp" //FIXME: including .cpp
#include <libproc.h>
#include <limits.h>
#include <unistd.h>
#define ADDR2LINE "atos"
/**
* @brief TranslateStackTrace
* @param stacktrace These are the lines and addresses produced by backtrace_symbols()
* Translates the module and address information from backtrace symbols into a vector of StackFrame objects,
* each with its own set of entries representing the function call and any inlined functions for that call.
*/
static void TranslateStackTrace(bool* aiCrash, StackTrace& stacktrace, const int logLevel)
{
LOG_L(L_DEBUG, "TranslateStackTrace[1]");
pid_t pid = getpid();
char path[PATH_MAX + 1];
for (auto it = stacktrace.begin(); it != stacktrace.end(); ++it) {
Dl_info info;
it->addr = (dladdr(it->ip, &info) != 0) ? (uintptr_t)info.dli_fbase : INVALID_ADDR_INDICATOR;
// Find library path
// http://stackoverflow.com/questions/8240436/filename-of-memory-mapped-libraries-osx
// Parsing output of vmmap will be a pain as it doesn't flush buffers (fgets hangs).
// Painful workaround http://www.programmingforums.org/thread36915-2.html
int count = proc_regionfilename(pid, (uintptr_t)it->ip, path, PATH_MAX);
if (count > 0) {
path[count] = '\0';
it->path = path;
} else {
// dyld_shared_cache ? whats that ?
it->path = "";
}
LOG_L(L_DEBUG, "symbol = \"%s\", path = \"%s\", addr = 0x%lx", it->symbol.c_str(), path, it->ip);
}
LOG_L(L_DEBUG, "TranslateStackTrace[2]");
// Check if atos is available
static int addr2line_found = -1;
if (addr2line_found < 0)
{
FILE* cmdOut = popen(ADDR2LINE " --help 2>/dev/null", "r");
if (cmdOut == NULL) {
addr2line_found = false;
} else {
addr2line_found = true;
pclose(cmdOut);
}
}
if (!addr2line_found) {
LOG_L(L_WARNING, " %s not found!", ADDR2LINE);
return;
}
LOG_L(L_DEBUG, "TranslateStackTrace[3]");
std::map<uintptr_t,std::string> addr_path;
for (auto it = stacktrace.cbegin(); it != stacktrace.cend(); ++it) {
if (it->path.empty()) {
StackFunction entry;
entry.funcname = it->symbol;
stacktrace[it->level].entries.push_back(entry);
} else {
addr_path[it->addr] = it->path;
}
}
LOG_L(L_DEBUG, "TranslateStackTrace[4]");
// Finally translate it:
// This is nested so that the outer loop covers all the entries for one library -- this means fewer atos calls.
for (auto it = addr_path.cbegin(); it != addr_path.cend(); ++it) {
const std::string& modulePath = it->second;
LOG_L(L_DEBUG, "modulePath: %s", modulePath.c_str());
std::ostringstream buf;
buf << ADDR2LINE << " -o " << modulePath << " -arch x86_64 -l " << std::hex << it->first;
// insert requested addresses that should be translated by atos
std::queue<size_t> indices;
int i=0;
for (auto fit = stacktrace.cbegin(); fit != stacktrace.cend(); fit++) {
if (fit->path == modulePath) {
buf << " " << std::hex << fit->ip;
indices.push(i);
}
i++;
}
// execute command atos, read stdout and write to log-file
buf << " 2>/dev/null"; // hide error output from spring's pipe
LOG_L(L_DEBUG, "> %s", buf.str().c_str());
FILE* cmdOut = popen(buf.str().c_str(), "r");
if (cmdOut != NULL) {
const size_t maxLength = 2048;
char line[maxLength];
while (fgets_addr2line(line, maxLength, cmdOut) != NULL) {
i = indices.front();
indices.pop();
StackFunction entry;
entry.funcname = std::string(line);
stacktrace[i].entries.push_back(entry);
}
pclose(cmdOut);
}
}
LOG_L(L_DEBUG, "TranslateStackTrace[5]");
return;
}
static void LogStacktrace(const int logLevel, StackTrace& stacktrace)
{
// Print out the translated StackTrace
unsigned numLine = 0;
unsigned hiddenLines = 0;
for (auto fit = stacktrace.cbegin(); fit != stacktrace.cend(); fit++) {
for (auto eit = fit->entries.begin(); eit != fit->entries.end(); eit++) {
LOG_I(logLevel, "[%02u] %s", fit->level, eit->funcname.c_str());
}
}
}
// ### Unix(compliant) CrashHandler END
#else
// ### Fallback CrashHandler (old Apple) START
#warning Fallback CrashHandler used
namespace CrashHandler {
void Install() {}
void Remove() {}
void Stacktrace(Threading::NativeThreadHandle thread, const std::string& threadName) {}
void PrepareStacktrace() {}
void CleanupStacktrace() {}
void OutputStacktrace() {}
};
// ### Fallback CrashHandler (old Apple) END
#endif
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