mirror of
https://github.com/mozilla/gecko-dev.git
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318 lines
8.4 KiB
C++
318 lines
8.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is Mozilla Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1998
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* Netscape Communications Corporation. All Rights Reserved.
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*/
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#include "nsISupports.h"
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#include "prprf.h"
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#include "prlog.h"
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#if defined(_WIN32)
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#include <windows.h>
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#endif
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static PRLogModuleInfo* gTraceRefcntLog;
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#if defined(NS_MT_SUPPORTED)
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#include "prlock.h"
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static PRLock* gTraceLock;
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#define LOCK_TRACELOG() PR_Lock(gTraceLock)
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#define UNLOCK_TRACELOG() PR_Unlock(gTraceLock)
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#else /* ! NT_MT_SUPPORTED */
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#define LOCK_TRACELOG()
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#define UNLOCK_TRACELOG()
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#endif /* ! NS_MT_SUPPORTED */
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static void InitTraceLog(void)
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{
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if (0 == gTraceRefcntLog) {
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gTraceRefcntLog = PR_NewLogModule("xpcomrefcnt");
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#if defined(NS_MT_SUPPORTED)
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gTraceLock = PR_NewLock();
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#endif /* NS_MT_SUPPORTED */
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}
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}
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#if defined(MOZ_TRACE_XPCOM_REFCNT)
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#if defined(_WIN32)
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#include "imagehlp.h"
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#include <stdio.h>
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#if 0
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static BOOL __stdcall
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EnumSymbolsCB(LPSTR aSymbolName,
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ULONG aSymbolAddress,
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ULONG aSymbolSize,
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PVOID aUserContext)
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{
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int* countp = (int*) aUserContext;
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int count = *countp;
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if (count < 3) {
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printf(" %p[%4d]: %s\n", aSymbolAddress, aSymbolSize, aSymbolName);
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count++;
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*countp = count++;
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}
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return TRUE;
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}
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static BOOL __stdcall
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EnumModulesCB(LPSTR aModuleName,
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ULONG aBaseOfDll,
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PVOID aUserContext)
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{
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HANDLE myProcess = ::GetCurrentProcess();
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printf("module=%s dll=%x\n", aModuleName, aBaseOfDll);
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// int count = 0;
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// SymEnumerateSymbols(myProcess, aBaseOfDll, EnumSymbolsCB, (void*) &count);
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return TRUE;
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}
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#endif
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/**
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* Walk the stack, translating PC's found into strings and recording the
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* chain in aBuffer. For this to work properly, the dll's must be rebased
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* so that the address in the file agrees with the address in memory.
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* Otherwise StackWalk will return FALSE when it hits a frame in a dll's
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* whose in memory address doesn't match it's in-file address.
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*
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* Fortunately, there is a handy dandy routine in IMAGEHLP.DLL that does
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* the rebasing and accordingly I've made a tool to use it to rebase the
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* DLL's in one fell swoop (see xpcom/tools/windows/rebasedlls.cpp).
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*/
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void
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nsTraceRefcnt::WalkTheStack(char* aBuffer, int aBufLen)
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{
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CONTEXT context;
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STACKFRAME frame;
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char* cp = aBuffer;
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aBuffer[0] = '\0';
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aBufLen--; // leave room for nul
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HANDLE myProcess = ::GetCurrentProcess();
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HANDLE myThread = ::GetCurrentThread();
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// Get the context information for this thread. That way we will
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// know where our sp, fp, pc, etc. are and can fill in the
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// STACKFRAME with the initial values.
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context.ContextFlags = CONTEXT_FULL;
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GetThreadContext(myThread, &context);
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if (!SymInitialize(myProcess, ".;..\\lib", TRUE)) {
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return;
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}
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#if 0
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SymEnumerateModules(myProcess, EnumModulesCB, NULL);
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#endif
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// Setup initial stack frame to walk from
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memset(&frame, 0, sizeof(frame));
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frame.AddrPC.Mode = AddrModeFlat;
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frame.AddrPC.Offset = context.Eip;
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frame.AddrReturn.Mode = AddrModeFlat;
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frame.AddrReturn.Offset = context.Ebp;
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frame.AddrFrame.Mode = AddrModeFlat;
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frame.AddrFrame.Offset = context.Ebp;
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frame.AddrStack.Mode = AddrModeFlat;
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frame.AddrStack.Offset = context.Esp;
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frame.Params[0] = context.Eax;
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frame.Params[1] = context.Ecx;
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frame.Params[2] = context.Edx;
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frame.Params[3] = context.Ebx;
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// Now walk the stack and map the pc's to symbol names that we stuff
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// append to *cp.
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int skip = 2;
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int syms = 0;
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while (aBufLen > 0) {
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char symbolBuffer[sizeof(IMAGEHLP_SYMBOL) + 512];
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PIMAGEHLP_SYMBOL pSymbol = (PIMAGEHLP_SYMBOL) symbolBuffer;
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pSymbol->SizeOfStruct = sizeof(symbolBuffer);
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pSymbol->MaxNameLength = 512;
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DWORD oldAddress = frame.AddrPC.Offset;
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BOOL b = ::StackWalk(IMAGE_FILE_MACHINE_I386, myProcess, myThread,
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&frame, &context, NULL,
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SymFunctionTableAccess,
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SymGetModuleBase,
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NULL);
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if (!b || (0 == frame.AddrPC.Offset)) {
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if (syms <= 1) {
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skip = 7;
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}
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break;
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}
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if (--skip >= 0) {
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continue;
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}
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DWORD disp;
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if (SymGetSymFromAddr(myProcess, frame.AddrPC.Offset, &disp, pSymbol)) {
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int nameLen = strlen(pSymbol->Name);
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if (nameLen + 2 > aBufLen) {
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break;
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}
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memcpy(cp, pSymbol->Name, nameLen);
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cp += nameLen;
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*cp++ = ' ';
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aBufLen -= nameLen + 1;
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syms++;
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}
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else {
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if (11 > aBufLen) {
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break;
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}
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char tmp[30];
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PR_snprintf(tmp, sizeof(tmp), "0x%08x ", frame.AddrPC.Offset);
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memcpy(cp, tmp, 11);
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cp += 11;
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aBufLen -= 11;
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syms++;
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}
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}
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*cp = 0;
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}
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#endif /* _WIN32 */
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#else /* MOZ_TRACE_XPCOM_REFCNT */
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void
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nsTraceRefcnt::WalkTheStack(char* aBuffer, int aBufLen)
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{
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aBuffer[0] = '\0';
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}
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#endif /* MOZ_TRACE_XPCOM_REFCNT */
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NS_COM void
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nsTraceRefcnt::LoadLibrarySymbols(const char* aLibraryName,
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void* aLibrayHandle)
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{
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#ifdef MOZ_TRACE_XPCOM_REFCNT
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#if defined(_WIN32)
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InitTraceLog();
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if (PR_LOG_TEST(gTraceRefcntLog,PR_LOG_DEBUG)) {
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HANDLE myProcess = ::GetCurrentProcess();
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if (!SymInitialize(myProcess, ".;..\\lib", TRUE)) {
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return;
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}
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BOOL b = ::SymLoadModule(myProcess,
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NULL,
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(char*)aLibraryName,
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(char*)aLibraryName,
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0,
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0);
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// DWORD lastError = 0;
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// if (!b) lastError = ::GetLastError();
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// printf("loading symbols for library %s => %s [%d]\n", aLibraryName,
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// b ? "true" : "false", lastError);
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}
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#endif
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#endif
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}
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NS_COM unsigned long
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nsTraceRefcnt::AddRef(void* aPtr,
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unsigned long aNewRefcnt,
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const char* aFile,
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PRIntn aLine)
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{
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#ifdef MOZ_TRACE_XPCOM_REFCNT
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InitTraceLog();
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LOCK_TRACELOG();
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if (PR_LOG_TEST(gTraceRefcntLog,PR_LOG_DEBUG)) {
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char sb[1000];
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WalkTheStack(sb, sizeof(sb));
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PR_LOG(gTraceRefcntLog, PR_LOG_DEBUG,
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("AddRef: %p: %d=>%d [%s] in %s (line %d)",
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aPtr, aNewRefcnt-1, aNewRefcnt, sb, aFile, aLine));
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}
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UNLOCK_TRACELOG();
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#endif
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return aNewRefcnt;
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}
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NS_COM unsigned long
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nsTraceRefcnt::Release(void* aPtr,
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unsigned long aNewRefcnt,
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const char* aFile,
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PRIntn aLine)
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{
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#ifdef MOZ_TRACE_XPCOM_REFCNT
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InitTraceLog();
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LOCK_TRACELOG();
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if (PR_LOG_TEST(gTraceRefcntLog,PR_LOG_DEBUG)) {
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char sb[1000];
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WalkTheStack(sb, sizeof(sb));
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PR_LOG(gTraceRefcntLog, PR_LOG_DEBUG,
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("Release: %p: %d=>%d [%s] in %s (line %d)",
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aPtr, aNewRefcnt+1, aNewRefcnt, sb, aFile, aLine));
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}
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UNLOCK_TRACELOG();
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#endif
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return aNewRefcnt;
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}
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NS_COM void
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nsTraceRefcnt::Create(void* aPtr,
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const char* aType,
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const char* aFile,
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PRIntn aLine)
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{
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#ifdef MOZ_TRACE_XPCOM_REFCNT
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InitTraceLog();
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LOCK_TRACELOG();
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if (PR_LOG_TEST(gTraceRefcntLog,PR_LOG_DEBUG)) {
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char sb[1000];
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WalkTheStack(sb, sizeof(sb));
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PR_LOG(gTraceRefcntLog, PR_LOG_DEBUG,
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("Create: %p[%s]: [%s] in %s (line %d)",
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aPtr, aType, sb, aFile, aLine));
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}
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UNLOCK_TRACELOG();
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#endif
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}
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NS_COM void
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nsTraceRefcnt::Destroy(void* aPtr,
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const char* aFile,
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PRIntn aLine)
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{
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#ifdef MOZ_TRACE_XPCOM_REFCNT
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InitTraceLog();
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LOCK_TRACELOG();
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if (PR_LOG_TEST(gTraceRefcntLog,PR_LOG_DEBUG)) {
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char sb[1000];
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WalkTheStack(sb, sizeof(sb));
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PR_LOG(gTraceRefcntLog, PR_LOG_DEBUG,
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("Destroy: %p: [%s] in %s (line %d)",
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aPtr, sb, aFile, aLine));
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}
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UNLOCK_TRACELOG();
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#endif
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}
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