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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, so just include the .cpp
#include "System/Platform/Linux/CrashHandler.cpp"
#include <libproc.h>
#include <limits.h>
#include <unistd.h>
#ifndef ADDR2LINE
#error "ADDR2LINE undefined"
#endif
static bool HaveAddr2LineMac()
{
static int i = -1;
if (i == -1) {
FILE* f = popen(ADDR2LINE " --help 2>/dev/null", "r");
if ((i = (f == nullptr)) == 1)
return false;
pclose(f);
}
return (i == 0);
}
/**
* @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(StackTrace& stacktrace, const int logLevel)
{
LOG_L(L_DEBUG, "[%s][1] #stacktrace=%u", __func__, static_cast<unsigned int>(stacktrace.size()));
const pid_t pid = getpid();
typedef std::pair<uintptr_t, std::string> AddrPathPair;
// typedef std::function<bool(const AddrPathPair&, const AddrPathPair&)> AddrPathComp;
std::array<AddrPathPair, 1024> addrPathMap;
std::deque<size_t> stackFrameIndices;
std::ostringstream execCommandBuffer;
std::string execCommandString;
for (StackFrame& stackFrame: stacktrace) {
Dl_info info;
stackFrame.addr = (dladdr(stackFrame.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
char path[PATH_MAX + 1];
const int count = proc_regionfilename(pid, (uintptr_t)stackFrame.ip, path, sizeof(path) - 1);
if (count > 0) {
path[count] = '\0';
stackFrame.path = path;
} else {
// dyld_shared_cache ? whats that ?
stackFrame.path = "";
}
LOG_L(L_DEBUG, "\tsymbol = \"%s\", path = \"%s\", addr = 0x%lx", stackFrame.symbol.c_str(), path, stackFrame.ip);
}
LOG_L(L_DEBUG, "[%s][2]", __func__);
// check if atos is available
if (!HaveAddr2LineMac())
LOG_L(L_WARNING, " %s not found!", ADDR2LINE);
LOG_L(L_DEBUG, "[%s][3]", __func__);
unsigned int numAddrPairs = 0;
for (const StackFrame& stackFrame: stacktrace) {
if (stackFrame.path.empty()) {
StackEntry entry;
entry.funcname = stackFrame.symbol;
stacktrace[stackFrame.level].entries.push_back(entry);
continue;
}
if (numAddrPairs >= addrPathMap.size())
continue;
addrPathMap[numAddrPairs++] = {stackFrame.addr, stackFrame.path};
}
// sort by address
std::sort(addrPathMap.begin(), addrPathMap.begin() + numAddrPairs, [](const AddrPathPair& a, const AddrPathPair& b) { return (a.first < b.first); });
LOG_L(L_DEBUG, "[%s][4]", __func__);
// Finally translate it:
// This is nested so that the outer loop covers all the entries for one library -- this means fewer atos calls.
for (unsigned int j = 0; j < numAddrPairs; j++) {
const AddrPathPair& addrPathPair = addrPathMap[j];
const std::string& modulePath = addrPathPair.second;
LOG_L(L_DEBUG, "\tmodulePath: %s", modulePath.c_str());
execCommandBuffer.str("");
execCommandString.clear();
stackFrameIndices.clear();
execCommandBuffer << ADDR2LINE << " -o " << modulePath << " -arch x86_64 -l " << std::hex << addrPathPair.first;
// insert requested addresses that should be translated by atos
int i = 0;
for (const StackFrame& stackFrame: stacktrace) {
if (stackFrame.path == modulePath) {
execCommandBuffer << " " << std::hex << stackFrame.ip;
stackFrameIndices.push_back(i);
}
i++;
}
// execute command atos, read stdout and write to log-file
// hide error output from spring's pipe
execCommandBuffer << " 2>/dev/null";
execCommandString = std::move(execCommandBuffer.str());
LOG_L(L_DEBUG, "\t> %s", execCommandString.c_str());
FILE* cmdOut = popen(execCommandString.c_str(), "r");
if (cmdOut != nullptr) {
char line[2048];
while (fgets(line, sizeof(line), cmdOut) != nullptr) {
i = stackFrameIndices.front();
stackFrameIndices.pop_front();
StackEntry entry;
entry.funcname = std::string(line);
stacktrace[i].entries.push_back(entry);
}
pclose(cmdOut);
}
}
LOG_L(L_DEBUG, "[%s][5]", __func__);
}
static void LogStacktrace(const int logLevel, StackTrace& stacktrace)
{
// Print out the translated StackTrace
for (const StackFrame& stackFrame: stacktrace) {
for (const StackEntry& stackEntry: stackFrame.entries) {
LOG_I(logLevel, "[%02u] %s", stackFrame.level, stackEntry.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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