rpcs3/Utilities/stack_trace.cpp

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#include "stdafx.h"
#include "stack_trace.h"
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#define DBGHELP_TRANSLATE_TCHAR
#include <DbgHelp.h>
#include <codecvt>
#else
#include <execinfo.h>
#endif
namespace utils
{
#ifdef _WIN32
std::string wstr_to_utf8(LPWSTR data, int str_len)
{
if (!str_len)
{
return {};
}
// Calculate size
const auto length = WideCharToMultiByte(CP_UTF8, 0, data, str_len, NULL, 0, NULL, NULL);
// Convert
std::vector<char> out(length + 1, 0);
WideCharToMultiByte(CP_UTF8, 0, data, str_len, out.data(), length, NULL, NULL);
return out.data();
}
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std::vector<void*> get_backtrace(int max_depth)
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{
std::vector<void*> result = {};
const auto hProcess = ::GetCurrentProcess();
const auto hThread = ::GetCurrentThread();
CONTEXT context{};
RtlCaptureContext(&context);
STACKFRAME64 stack = {};
stack.AddrPC.Offset = context.Rip;
stack.AddrPC.Mode = AddrModeFlat;
stack.AddrStack.Offset = context.Rsp;
stack.AddrStack.Mode = AddrModeFlat;
stack.AddrFrame.Offset = context.Rbp;
stack.AddrFrame.Mode = AddrModeFlat;
while (max_depth--)
{
if (!StackWalk64(
IMAGE_FILE_MACHINE_AMD64,
hProcess,
hThread,
&stack,
&context,
NULL,
SymFunctionTableAccess64,
SymGetModuleBase64,
NULL))
{
break;
}
result.push_back(reinterpret_cast<void*>(stack.AddrPC.Offset));
}
return result;
}
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std::vector<std::string> get_backtrace_symbols(const std::vector<void*>& stack)
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{
std::vector<std::string> result = {};
std::vector<u8> symbol_buf(sizeof(SYMBOL_INFO) + sizeof(TCHAR) * 256);
const auto hProcess = ::GetCurrentProcess();
auto sym = reinterpret_cast<SYMBOL_INFO*>(symbol_buf.data());
sym->SizeOfStruct = sizeof(SYMBOL_INFO);
sym->MaxNameLen = 256;
IMAGEHLP_LINEW64 line_info{};
line_info.SizeOfStruct = sizeof(IMAGEHLP_LINEW64);
SymInitialize(hProcess, NULL, TRUE);
SymSetOptions(SYMOPT_LOAD_LINES);
for (const auto& pointer : stack)
{
DWORD64 unused;
SymFromAddr(hProcess, reinterpret_cast<DWORD64>(pointer), &unused, sym);
if (sym->NameLen)
{
const auto function_name = wstr_to_utf8(sym->Name, static_cast<int>(sym->NameLen));
// Attempt to get file and line information if available
DWORD unused2;
if (SymGetLineFromAddrW(hProcess, reinterpret_cast<DWORD64>(pointer), &unused2, &line_info))
{
const auto full_path = fmt::format("%s:%u %s", wstr_to_utf8(line_info.FileName, -1), line_info.LineNumber, function_name);
result.push_back(full_path);
}
else
{
result.push_back(function_name);
}
}
else
{
result.push_back(fmt::format("rpcs3@0xp", pointer));
}
}
return result;
}
#else
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std::vector<void*> get_backtrace(int max_depth)
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{
std::vector<void*> result(max_depth);
int depth = backtrace(result.data(), max_depth);
result.resize(depth);
return result;
}
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std::vector<std::string> get_backtrace_symbols(const std::vector<void*>& stack)
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{
std::vector<std::string> result;
result.reserve(stack.size());
const auto symbols = backtrace_symbols(stack.data(), static_cast<int>(stack.size()));
for (usz i = 0; i < stack.size(); ++i)
{
result.push_back(symbols[i]);
}
free(symbols);
return result;
}
#endif
}