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[Windows] Implement PrintStackTrace(FILE*)
llvm::sys::PrintBacktrace(FILE*) is supposed to print a backtrace of the current thread given the current PC. This function was unimplemented on Windows, and instead the only time we could print a backtrace was as the result of an exception through LLVMUnhandledExceptionFilter. This patch implements backtracing of self by using RtlCaptureContext to get a CONTEXT for the current thread, and moving the printing and StackWalk64 code to a common method that printing own stack trace and printing stack trace of an exception can use. Differential Revision: http://reviews.llvm.org/D8068 Reviewed by: Reid Kleckner git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@231382 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Zachary Turner
parent
a744a15e97
commit
98638f07f1
@ -10,7 +10,6 @@
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// This file provides the Win32 specific implementation of the Signals class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/FileSystem.h"
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#include <algorithm>
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#include <signal.h>
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@ -173,6 +172,89 @@ static PTOP_LEVEL_EXCEPTION_FILTER OldFilter = NULL;
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// globals which this critical section addresses.
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static CRITICAL_SECTION CriticalSection;
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static void PrintStackTraceForThread(FILE *File, HANDLE hProcess,
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HANDLE hThread, STACKFRAME64 &StackFrame,
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CONTEXT *Context) {
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DWORD machineType;
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#if defined(_M_X64)
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machineType = IMAGE_FILE_MACHINE_AMD64;
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#else
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machineType = IMAGE_FILE_MACHINE_I386;
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#endif
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// Initialize the symbol handler.
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SymSetOptions(SYMOPT_DEFERRED_LOADS | SYMOPT_LOAD_LINES);
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SymInitialize(hProcess, NULL, TRUE);
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while (true) {
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if (!StackWalk64(machineType, hProcess, hThread, &StackFrame, Context, NULL,
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SymFunctionTableAccess64, SymGetModuleBase64, NULL)) {
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break;
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}
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if (StackFrame.AddrFrame.Offset == 0)
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break;
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// Print the PC in hexadecimal.
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DWORD64 PC = StackFrame.AddrPC.Offset;
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#if defined(_M_X64)
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fprintf(File, "0x%016llX", PC);
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#elif defined(_M_IX86)
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fprintf(File, "0x%08lX", static_cast<DWORD>(PC));
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#endif
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// Print the parameters. Assume there are four.
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#if defined(_M_X64)
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fprintf(File, " (0x%016llX 0x%016llX 0x%016llX 0x%016llX)",
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StackFrame.Params[0], StackFrame.Params[1], StackFrame.Params[2],
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StackFrame.Params[3]);
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#elif defined(_M_IX86)
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fprintf(File, " (0x%08lX 0x%08lX 0x%08lX 0x%08lX)",
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static_cast<DWORD>(StackFrame.Params[0]),
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static_cast<DWORD>(StackFrame.Params[1]),
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static_cast<DWORD>(StackFrame.Params[2]),
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static_cast<DWORD>(StackFrame.Params[3]));
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#endif
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// Verify the PC belongs to a module in this process.
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if (!SymGetModuleBase64(hProcess, PC)) {
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fputs(" <unknown module>\n", File);
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continue;
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}
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// Print the symbol name.
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char buffer[512];
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IMAGEHLP_SYMBOL64 *symbol = reinterpret_cast<IMAGEHLP_SYMBOL64 *>(buffer);
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memset(symbol, 0, sizeof(IMAGEHLP_SYMBOL64));
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symbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
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symbol->MaxNameLength = 512 - sizeof(IMAGEHLP_SYMBOL64);
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DWORD64 dwDisp;
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if (!SymGetSymFromAddr64(hProcess, PC, &dwDisp, symbol)) {
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fputc('\n', File);
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continue;
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}
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buffer[511] = 0;
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if (dwDisp > 0)
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fprintf(File, ", %s() + 0x%llX bytes(s)", symbol->Name, dwDisp);
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else
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fprintf(File, ", %s", symbol->Name);
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// Print the source file and line number information.
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IMAGEHLP_LINE64 line;
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DWORD dwLineDisp;
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memset(&line, 0, sizeof(line));
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line.SizeOfStruct = sizeof(line);
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if (SymGetLineFromAddr64(hProcess, PC, &dwLineDisp, &line)) {
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fprintf(File, ", %s, line %lu", line.FileName, line.LineNumber);
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if (dwLineDisp > 0)
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fprintf(File, " + 0x%lX byte(s)", dwLineDisp);
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}
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fputc('\n', File);
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}
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}
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namespace llvm {
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//===----------------------------------------------------------------------===//
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@ -299,8 +381,25 @@ void sys::PrintStackTraceOnErrorSignal() {
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LeaveCriticalSection(&CriticalSection);
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}
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void llvm::sys::PrintStackTrace(FILE *) {
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// FIXME: Implement.
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void llvm::sys::PrintStackTrace(FILE *File) {
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STACKFRAME64 StackFrame = {0};
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CONTEXT Context = {0};
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::RtlCaptureContext(&Context);
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#if defined(_M_X64)
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StackFrame.AddrPC.Offset = Context.Rip;
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StackFrame.AddrStack.Offset = Context.Rsp;
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StackFrame.AddrFrame.Offset = Context.Rbp;
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#else
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StackFrame.AddrPC.Offset = Context.Eip;
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StackFrame.AddrStack.Offset = Context.Esp;
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StackFrame.AddrFrame.Offset = Context.Ebp;
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#endif
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StackFrame.AddrPC.Mode = AddrModeFlat;
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StackFrame.AddrStack.Mode = AddrModeFlat;
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StackFrame.AddrFrame.Mode = AddrModeFlat;
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PrintStackTraceForThread(File, GetCurrentProcess(), GetCurrentThread(),
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StackFrame, &Context);
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}
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@ -356,9 +455,7 @@ static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
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STACKFRAME64 StackFrame;
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memset(&StackFrame, 0, sizeof(StackFrame));
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DWORD machineType;
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#if defined(_M_X64)
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machineType = IMAGE_FILE_MACHINE_AMD64;
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StackFrame.AddrPC.Offset = ep->ContextRecord->Rip;
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StackFrame.AddrPC.Mode = AddrModeFlat;
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StackFrame.AddrStack.Offset = ep->ContextRecord->Rsp;
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@ -366,7 +463,6 @@ static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
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StackFrame.AddrFrame.Offset = ep->ContextRecord->Rbp;
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StackFrame.AddrFrame.Mode = AddrModeFlat;
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#elif defined(_M_IX86)
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machineType = IMAGE_FILE_MACHINE_I386;
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StackFrame.AddrPC.Offset = ep->ContextRecord->Eip;
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StackFrame.AddrPC.Mode = AddrModeFlat;
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StackFrame.AddrStack.Offset = ep->ContextRecord->Esp;
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@ -377,81 +473,8 @@ static LONG WINAPI LLVMUnhandledExceptionFilter(LPEXCEPTION_POINTERS ep) {
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HANDLE hProcess = GetCurrentProcess();
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HANDLE hThread = GetCurrentThread();
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// Initialize the symbol handler.
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SymSetOptions(SYMOPT_DEFERRED_LOADS|SYMOPT_LOAD_LINES);
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SymInitialize(hProcess, NULL, TRUE);
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while (true) {
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if (!StackWalk64(machineType, hProcess, hThread, &StackFrame,
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ep->ContextRecord, NULL, SymFunctionTableAccess64,
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SymGetModuleBase64, NULL)) {
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break;
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}
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if (StackFrame.AddrFrame.Offset == 0)
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break;
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// Print the PC in hexadecimal.
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DWORD64 PC = StackFrame.AddrPC.Offset;
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#if defined(_M_X64)
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fprintf(stderr, "0x%016llX", PC);
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#elif defined(_M_IX86)
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fprintf(stderr, "0x%08lX", static_cast<DWORD>(PC));
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#endif
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// Print the parameters. Assume there are four.
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#if defined(_M_X64)
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fprintf(stderr, " (0x%016llX 0x%016llX 0x%016llX 0x%016llX)",
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StackFrame.Params[0],
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StackFrame.Params[1],
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StackFrame.Params[2],
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StackFrame.Params[3]);
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#elif defined(_M_IX86)
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fprintf(stderr, " (0x%08lX 0x%08lX 0x%08lX 0x%08lX)",
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static_cast<DWORD>(StackFrame.Params[0]),
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static_cast<DWORD>(StackFrame.Params[1]),
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static_cast<DWORD>(StackFrame.Params[2]),
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static_cast<DWORD>(StackFrame.Params[3]));
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#endif
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// Verify the PC belongs to a module in this process.
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if (!SymGetModuleBase64(hProcess, PC)) {
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fputs(" <unknown module>\n", stderr);
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continue;
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}
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// Print the symbol name.
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char buffer[512];
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IMAGEHLP_SYMBOL64 *symbol = reinterpret_cast<IMAGEHLP_SYMBOL64 *>(buffer);
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memset(symbol, 0, sizeof(IMAGEHLP_SYMBOL64));
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symbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
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symbol->MaxNameLength = 512 - sizeof(IMAGEHLP_SYMBOL64);
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DWORD64 dwDisp;
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if (!SymGetSymFromAddr64(hProcess, PC, &dwDisp, symbol)) {
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fputc('\n', stderr);
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continue;
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}
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buffer[511] = 0;
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if (dwDisp > 0)
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fprintf(stderr, ", %s() + 0x%llX bytes(s)", symbol->Name, dwDisp);
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else
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fprintf(stderr, ", %s", symbol->Name);
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// Print the source file and line number information.
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IMAGEHLP_LINE64 line;
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DWORD dwLineDisp;
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memset(&line, 0, sizeof(line));
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line.SizeOfStruct = sizeof(line);
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if (SymGetLineFromAddr64(hProcess, PC, &dwLineDisp, &line)) {
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fprintf(stderr, ", %s, line %lu", line.FileName, line.LineNumber);
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if (dwLineDisp > 0)
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fprintf(stderr, " + 0x%lX byte(s)", dwLineDisp);
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}
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fputc('\n', stderr);
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}
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PrintStackTraceForThread(stderr, hProcess, hThread, StackFrame,
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ep->ContextRecord);
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_exit(ep->ExceptionRecord->ExceptionCode);
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}
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