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#include "symbolizer.h"
#include <contrib/libs/backtrace/backtrace.h>
#include <util/generic/string.h>
#include <util/generic/vector.h>
#include <util/system/type_name.h>
#include <util/system/execpath.h>
#include <util/string/builder.h>
#include <mutex>
#include <numeric>
#include <algorithm>
#include <util/stream/mem.h>
#ifdef __GNUC__
#include <cxxabi.h>
#endif
namespace {
const size_t MaxStrLen = 512;
const size_t MaxDemangleLen = 1024 * 1024;
char Buff[MaxDemangleLen];
class TNoThrowingMemoryOutput : public TMemoryOutput {
public:
TNoThrowingMemoryOutput(void* c, size_t l) : TMemoryOutput(c, l) {}
void Truncate() {
*(Buf_ - 1) = '.';
*(Buf_ - 2) = '.';
*(Buf_ - 3) = '.';
}
void DoWrite(const void* buf, size_t len) override {
bool truncated = Buf_ + len > End_;
if (truncated) {
len = std::min(len, (size_t)(End_ - Buf_));
}
memcpy(Buf_, buf, len);
Buf_ += len;
if (truncated) {
Truncate();
}
}
void DoWriteC(char c) override {
if (Buf_ == End_) {
Truncate();
} else {
*Buf_++ = c;
}
}
};
void HandleLibBacktraceError(void* data, const char* msg, int) {
if (!data) {
Cerr << msg;
return;
}
TNoThrowingMemoryOutput out(data, MaxStrLen - 1);
out << msg;
}
const char* Demangle(const char* name) {
#ifndef __GNUC__
return name;
#else
int status;
size_t len = MaxDemangleLen - 1;
const char* res = __cxxabiv1::__cxa_demangle(name, Buff, &len, &status);
if (!res) {
return name;
}
return res;
#endif
}
int HandleLibBacktraceFrame(void* data, uintptr_t, const char* filename, int lineno, const char* function) {
TNoThrowingMemoryOutput out(data, MaxStrLen - 1);
const char* fileName = filename ? filename : "???";
const char* functionName = function ? Demangle(function) : "???";
out << functionName << " at " << fileName << ":" << lineno << ":0";
return 0;
}
}
namespace NYql {
namespace NBacktrace {
namespace {
std::mutex Mutex;
char* Result[Limit];
size_t Order[Limit];
char TmpBuffer[MaxStrLen * Limit]{};
auto CreateState(const char* filename) {
return backtrace_create_state(
filename,
0,
HandleLibBacktraceError,
nullptr
);
}
}
void Symbolize(const TStackFrame* frames, size_t count, IOutputStream* out) {
if (!count) {
return;
}
memset(TmpBuffer, 0, sizeof(TmpBuffer));
Result[0] = TmpBuffer;
for (size_t i = 1; i < Limit; ++i) {
Result[i] = Result[i - 1] + MaxStrLen;
}
const std::lock_guard lock{Mutex};
std::iota(Order, Order + count, 0u);
std::sort(Order, Order + count, [&frames](auto a, auto b) { return strcmp(frames[a].File, frames[b].File) < 0; });
struct backtrace_state* state = nullptr;
for (size_t i = 0; i < count; ++i) {
if (!i || frames[Order[i - 1]].File != frames[Order[i]].File) {
state = CreateState(frames[Order[i]].File);
}
if (!state) {
Result[Order[i]] = nullptr; // File not found
continue;
}
int status = backtrace_pcinfo(
state,
reinterpret_cast<uintptr_t>(frames[Order[i]].Address) - 1, // last byte of the call instruction
HandleLibBacktraceFrame,
HandleLibBacktraceError,
reinterpret_cast<void*>(Result[Order[i]]));
if (0 != status) {
break;
}
}
for (size_t i = 0; i < count; ++i) {
if (Result[i]) {
*out << Result[i] << "\n";
} else {
*out << "File `" << frames[i].File << "` not found\n";
}
}
}
}
}
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