mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 09:05:45 +00:00
e368dc9c85
This patch was generated by a script. Here's the source of the script for
future reference:
function convert() {
echo "Converting $1 to $2..."
find . ! -wholename "*nsprpub*" \
! -wholename "*security/nss*" \
! -wholename "*/.hg*" \
! -wholename "obj-ff-dbg*" \
! -name nsXPCOMCID.h \
! -name prtypes.h \
-type f \
\( -iname "*.cpp" \
-o -iname "*.h" \
-o -iname "*.c" \
-o -iname "*.cc" \
-o -iname "*.idl" \
-o -iname "*.ipdl" \
-o -iname "*.ipdlh" \
-o -iname "*.mm" \) | \
xargs -n 1 sed -i -e "s/\b$1\b/$2/g"
}
convert PRInt8 int8_t
convert PRUint8 uint8_t
convert PRInt16 int16_t
convert PRUint16 uint16_t
convert PRInt32 int32_t
convert PRUint32 uint32_t
convert PRInt64 int64_t
convert PRUint64 uint64_t
convert PRIntn int
convert PRUintn unsigned
convert PRSize size_t
convert PROffset32 int32_t
convert PROffset64 int64_t
convert PRPtrdiff ptrdiff_t
convert PRFloat64 double
1305 lines
37 KiB
C++
1305 lines
37 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/* API for getting a stack trace of the C/C++ stack on the current thread */
|
|
|
|
#include "mozilla/Util.h"
|
|
#include "mozilla/StackWalk.h"
|
|
#include "nsDebug.h"
|
|
#include "nsStackWalkPrivate.h"
|
|
|
|
#include "nsStackWalk.h"
|
|
|
|
using namespace mozilla;
|
|
|
|
// The presence of this address is the stack must stop the stack walk. If
|
|
// there is no such address, the structure will be {NULL, true}.
|
|
struct CriticalAddress {
|
|
void* mAddr;
|
|
bool mInit;
|
|
};
|
|
static CriticalAddress gCriticalAddress;
|
|
|
|
#if defined(HAVE_DLOPEN) || defined(XP_MACOSX)
|
|
#include <dlfcn.h>
|
|
#endif
|
|
|
|
#define NSSTACKWALK_SUPPORTS_MACOSX \
|
|
(defined(XP_MACOSX) && \
|
|
(defined(__i386) || defined(__ppc__) || defined(HAVE__UNWIND_BACKTRACE)))
|
|
|
|
#define NSSTACKWALK_SUPPORTS_LINUX \
|
|
(defined(linux) && \
|
|
((defined(__GNUC__) && (defined(__i386) || defined(PPC))) || \
|
|
defined(HAVE__UNWIND_BACKTRACE)))
|
|
|
|
#define NSSTACKWALK_SUPPORTS_SOLARIS \
|
|
(defined(__sun) && \
|
|
(defined(__sparc) || defined(sparc) || defined(__i386) || defined(i386)))
|
|
|
|
#if NSSTACKWALK_SUPPORTS_MACOSX
|
|
#include <pthread.h>
|
|
#include <errno.h>
|
|
#include <CoreServices/CoreServices.h>
|
|
|
|
typedef void
|
|
malloc_logger_t(uint32_t type, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3,
|
|
uintptr_t result, uint32_t num_hot_frames_to_skip);
|
|
extern malloc_logger_t *malloc_logger;
|
|
|
|
static void
|
|
stack_callback(void *pc, void *sp, void *closure)
|
|
{
|
|
const char *name = reinterpret_cast<char *>(closure);
|
|
Dl_info info;
|
|
|
|
// On Leopard dladdr returns the wrong value for "new_sem_from_pool". The
|
|
// stack shows up as having two pthread_cond_wait$UNIX2003 frames. The
|
|
// correct one is the first that we find on our way up, so the
|
|
// following check for gCriticalAddress.mAddr is critical.
|
|
if (gCriticalAddress.mAddr || dladdr(pc, &info) == 0 ||
|
|
info.dli_sname == NULL || strcmp(info.dli_sname, name) != 0)
|
|
return;
|
|
gCriticalAddress.mAddr = pc;
|
|
}
|
|
|
|
#define MAC_OS_X_VERSION_10_7_HEX 0x00001070
|
|
#define MAC_OS_X_VERSION_10_6_HEX 0x00001060
|
|
|
|
static int32_t OSXVersion()
|
|
{
|
|
static int32_t gOSXVersion = 0x0;
|
|
if (gOSXVersion == 0x0) {
|
|
OSErr err = ::Gestalt(gestaltSystemVersion, (SInt32*)&gOSXVersion);
|
|
MOZ_ASSERT(err == noErr);
|
|
}
|
|
return gOSXVersion;
|
|
}
|
|
|
|
static bool OnLionOrLater()
|
|
{
|
|
return (OSXVersion() >= MAC_OS_X_VERSION_10_7_HEX);
|
|
}
|
|
|
|
static bool OnSnowLeopardOrLater()
|
|
{
|
|
return (OSXVersion() >= MAC_OS_X_VERSION_10_6_HEX);
|
|
}
|
|
|
|
static void
|
|
my_malloc_logger(uint32_t type, uintptr_t arg1, uintptr_t arg2, uintptr_t arg3,
|
|
uintptr_t result, uint32_t num_hot_frames_to_skip)
|
|
{
|
|
static bool once = false;
|
|
if (once)
|
|
return;
|
|
once = true;
|
|
|
|
// On Leopard dladdr returns the wrong value for "new_sem_from_pool". The
|
|
// stack shows up as having two pthread_cond_wait$UNIX2003 frames.
|
|
const char *name = OnSnowLeopardOrLater() ? "new_sem_from_pool" :
|
|
"pthread_cond_wait$UNIX2003";
|
|
NS_StackWalk(stack_callback, 0, const_cast<char*>(name), 0);
|
|
}
|
|
|
|
void
|
|
StackWalkInitCriticalAddress()
|
|
{
|
|
if(gCriticalAddress.mInit)
|
|
return;
|
|
gCriticalAddress.mInit = true;
|
|
// We must not do work when 'new_sem_from_pool' calls realloc, since
|
|
// it holds a non-reentrant spin-lock and we will quickly deadlock.
|
|
// new_sem_from_pool is not directly accessible using dlsym, so
|
|
// we force a situation where new_sem_from_pool is on the stack and
|
|
// use dladdr to check the addresses.
|
|
|
|
// malloc_logger can be set by external tools like 'Instruments' or 'leaks'
|
|
malloc_logger_t *old_malloc_logger = malloc_logger;
|
|
malloc_logger = my_malloc_logger;
|
|
|
|
pthread_cond_t cond;
|
|
int r = pthread_cond_init(&cond, 0);
|
|
MOZ_ASSERT(r == 0);
|
|
pthread_mutex_t mutex;
|
|
r = pthread_mutex_init(&mutex,0);
|
|
MOZ_ASSERT(r == 0);
|
|
r = pthread_mutex_lock(&mutex);
|
|
MOZ_ASSERT(r == 0);
|
|
struct timespec abstime = {0, 1};
|
|
r = pthread_cond_timedwait_relative_np(&cond, &mutex, &abstime);
|
|
|
|
// restore the previous malloc logger
|
|
malloc_logger = old_malloc_logger;
|
|
|
|
// On Lion, malloc is no longer called from pthread_cond_*wait*. This prevents
|
|
// us from finding the address, but that is fine, since with no call to malloc
|
|
// there is no critical address.
|
|
MOZ_ASSERT(OnLionOrLater() || gCriticalAddress.mAddr != NULL);
|
|
MOZ_ASSERT(r == ETIMEDOUT);
|
|
r = pthread_mutex_unlock(&mutex);
|
|
MOZ_ASSERT(r == 0);
|
|
r = pthread_mutex_destroy(&mutex);
|
|
MOZ_ASSERT(r == 0);
|
|
r = pthread_cond_destroy(&cond);
|
|
MOZ_ASSERT(r == 0);
|
|
}
|
|
|
|
static bool IsCriticalAddress(void* aPC)
|
|
{
|
|
return gCriticalAddress.mAddr == aPC;
|
|
}
|
|
#else
|
|
static bool IsCriticalAddress(void* aPC)
|
|
{
|
|
return false;
|
|
}
|
|
// We still initialize gCriticalAddress.mInit so that this code behaves
|
|
// the same on all platforms. Otherwise a failure to init would be visible
|
|
// only on OS X.
|
|
void
|
|
StackWalkInitCriticalAddress()
|
|
{
|
|
gCriticalAddress.mInit = true;
|
|
}
|
|
#endif
|
|
|
|
#if defined(_WIN32) && (defined(_M_IX86) || defined(_M_AMD64) || defined(_M_IA64)) // WIN32 x86 stack walking code
|
|
|
|
#include "nscore.h"
|
|
#include <windows.h>
|
|
#include <process.h>
|
|
#include <stdio.h>
|
|
#include <malloc.h>
|
|
#include "plstr.h"
|
|
#include "mozilla/FunctionTimer.h"
|
|
|
|
#include "nspr.h"
|
|
#include <imagehlp.h>
|
|
// We need a way to know if we are building for WXP (or later), as if we are, we
|
|
// need to use the newer 64-bit APIs. API_VERSION_NUMBER seems to fit the bill.
|
|
// A value of 9 indicates we want to use the new APIs.
|
|
#if API_VERSION_NUMBER < 9
|
|
#error Too old imagehlp.h
|
|
#endif
|
|
|
|
// Define these as static pointers so that we can load the DLL on the
|
|
// fly (and not introduce a link-time dependency on it). Tip o' the
|
|
// hat to Matt Pietrick for this idea. See:
|
|
//
|
|
// http://msdn.microsoft.com/library/periodic/period97/F1/D3/S245C6.htm
|
|
//
|
|
PR_BEGIN_EXTERN_C
|
|
|
|
extern HANDLE hStackWalkMutex;
|
|
|
|
bool EnsureSymInitialized();
|
|
|
|
bool EnsureImageHlpInitialized();
|
|
|
|
struct WalkStackData {
|
|
uint32_t skipFrames;
|
|
HANDLE thread;
|
|
bool walkCallingThread;
|
|
HANDLE process;
|
|
HANDLE eventStart;
|
|
HANDLE eventEnd;
|
|
void **pcs;
|
|
uint32_t pc_size;
|
|
uint32_t pc_count;
|
|
void **sps;
|
|
uint32_t sp_size;
|
|
uint32_t sp_count;
|
|
};
|
|
|
|
void PrintError(char *prefix, WalkStackData* data);
|
|
unsigned int WINAPI WalkStackThread(void* data);
|
|
void WalkStackMain64(struct WalkStackData* data);
|
|
|
|
|
|
DWORD gStackWalkThread;
|
|
CRITICAL_SECTION gDbgHelpCS;
|
|
|
|
PR_END_EXTERN_C
|
|
|
|
// Routine to print an error message to standard error.
|
|
// Will also call callback with error, if data supplied.
|
|
void PrintError(char *prefix)
|
|
{
|
|
LPVOID lpMsgBuf;
|
|
DWORD lastErr = GetLastError();
|
|
FormatMessageA(
|
|
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
|
|
NULL,
|
|
lastErr,
|
|
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
|
|
(LPSTR) &lpMsgBuf,
|
|
0,
|
|
NULL
|
|
);
|
|
fprintf(stderr, "### ERROR: %s: %s",
|
|
prefix, lpMsgBuf ? lpMsgBuf : "(null)\n");
|
|
fflush(stderr);
|
|
LocalFree(lpMsgBuf);
|
|
}
|
|
|
|
bool
|
|
EnsureImageHlpInitialized()
|
|
{
|
|
static bool gInitialized = false;
|
|
|
|
if (gInitialized)
|
|
return gInitialized;
|
|
|
|
// Hope that our first call doesn't happen during static
|
|
// initialization. If it does, this CreateThread call won't
|
|
// actually start the thread until after the static initialization
|
|
// is done, which means we'll deadlock while waiting for it to
|
|
// process a stack.
|
|
HANDLE readyEvent = ::CreateEvent(NULL, FALSE /* auto-reset*/,
|
|
FALSE /* initially non-signaled */, NULL);
|
|
unsigned int threadID;
|
|
HANDLE hStackWalkThread = (HANDLE)
|
|
_beginthreadex(NULL, 0, WalkStackThread, (void*)readyEvent,
|
|
0, &threadID);
|
|
gStackWalkThread = threadID;
|
|
if (hStackWalkThread == NULL) {
|
|
PrintError("CreateThread");
|
|
return false;
|
|
}
|
|
::CloseHandle(hStackWalkThread);
|
|
|
|
// Wait for the thread's event loop to start before posting events to it.
|
|
::WaitForSingleObject(readyEvent, INFINITE);
|
|
::CloseHandle(readyEvent);
|
|
|
|
::InitializeCriticalSection(&gDbgHelpCS);
|
|
|
|
return gInitialized = true;
|
|
}
|
|
|
|
void
|
|
WalkStackMain64(struct WalkStackData* data)
|
|
{
|
|
// Get the context information for the thread. That way we will
|
|
// know where our sp, fp, pc, etc. are and can fill in the
|
|
// STACKFRAME64 with the initial values.
|
|
CONTEXT context;
|
|
HANDLE myProcess = data->process;
|
|
HANDLE myThread = data->thread;
|
|
DWORD64 addr;
|
|
DWORD64 spaddr;
|
|
STACKFRAME64 frame64;
|
|
// skip our own stack walking frames
|
|
int skip = (data->walkCallingThread ? 3 : 0) + data->skipFrames;
|
|
BOOL ok;
|
|
|
|
// Get a context for the specified thread.
|
|
memset(&context, 0, sizeof(CONTEXT));
|
|
context.ContextFlags = CONTEXT_FULL;
|
|
if (!GetThreadContext(myThread, &context)) {
|
|
PrintError("GetThreadContext");
|
|
return;
|
|
}
|
|
|
|
// Setup initial stack frame to walk from
|
|
memset(&frame64, 0, sizeof(frame64));
|
|
#ifdef _M_IX86
|
|
frame64.AddrPC.Offset = context.Eip;
|
|
frame64.AddrStack.Offset = context.Esp;
|
|
frame64.AddrFrame.Offset = context.Ebp;
|
|
#elif defined _M_AMD64
|
|
frame64.AddrPC.Offset = context.Rip;
|
|
frame64.AddrStack.Offset = context.Rsp;
|
|
frame64.AddrFrame.Offset = context.Rbp;
|
|
#elif defined _M_IA64
|
|
frame64.AddrPC.Offset = context.StIIP;
|
|
frame64.AddrStack.Offset = context.SP;
|
|
frame64.AddrFrame.Offset = context.RsBSP;
|
|
#else
|
|
#error "Should not have compiled this code"
|
|
#endif
|
|
frame64.AddrPC.Mode = AddrModeFlat;
|
|
frame64.AddrStack.Mode = AddrModeFlat;
|
|
frame64.AddrFrame.Mode = AddrModeFlat;
|
|
frame64.AddrReturn.Mode = AddrModeFlat;
|
|
|
|
// Now walk the stack
|
|
while (1) {
|
|
|
|
// debug routines are not threadsafe, so grab the lock.
|
|
EnterCriticalSection(&gDbgHelpCS);
|
|
ok = StackWalk64(
|
|
#ifdef _M_AMD64
|
|
IMAGE_FILE_MACHINE_AMD64,
|
|
#elif defined _M_IA64
|
|
IMAGE_FILE_MACHINE_IA64,
|
|
#elif defined _M_IX86
|
|
IMAGE_FILE_MACHINE_I386,
|
|
#else
|
|
#error "Should not have compiled this code"
|
|
#endif
|
|
myProcess,
|
|
myThread,
|
|
&frame64,
|
|
&context,
|
|
NULL,
|
|
SymFunctionTableAccess64, // function table access routine
|
|
SymGetModuleBase64, // module base routine
|
|
0
|
|
);
|
|
LeaveCriticalSection(&gDbgHelpCS);
|
|
|
|
if (ok) {
|
|
addr = frame64.AddrPC.Offset;
|
|
spaddr = frame64.AddrStack.Offset;
|
|
} else {
|
|
addr = 0;
|
|
spaddr = 0;
|
|
PrintError("WalkStack64");
|
|
}
|
|
|
|
if (!ok || (addr == 0)) {
|
|
break;
|
|
}
|
|
|
|
if (skip-- > 0) {
|
|
continue;
|
|
}
|
|
|
|
if (data->pc_count < data->pc_size)
|
|
data->pcs[data->pc_count] = (void*)addr;
|
|
++data->pc_count;
|
|
|
|
if (data->sp_count < data->sp_size)
|
|
data->sps[data->sp_count] = (void*)spaddr;
|
|
++data->sp_count;
|
|
|
|
if (frame64.AddrReturn.Offset == 0)
|
|
break;
|
|
}
|
|
return;
|
|
}
|
|
|
|
|
|
unsigned int WINAPI
|
|
WalkStackThread(void* aData)
|
|
{
|
|
BOOL msgRet;
|
|
MSG msg;
|
|
|
|
// Call PeekMessage to force creation of a message queue so that
|
|
// other threads can safely post events to us.
|
|
::PeekMessage(&msg, NULL, WM_USER, WM_USER, PM_NOREMOVE);
|
|
|
|
// and tell the thread that created us that we're ready.
|
|
HANDLE readyEvent = (HANDLE)aData;
|
|
::SetEvent(readyEvent);
|
|
|
|
while ((msgRet = ::GetMessage(&msg, (HWND)-1, 0, 0)) != 0) {
|
|
if (msgRet == -1) {
|
|
PrintError("GetMessage");
|
|
} else {
|
|
DWORD ret;
|
|
|
|
struct WalkStackData *data = (WalkStackData *)msg.lParam;
|
|
if (!data)
|
|
continue;
|
|
|
|
// Don't suspend the calling thread until it's waiting for
|
|
// us; otherwise the number of frames on the stack could vary.
|
|
ret = ::WaitForSingleObject(data->eventStart, INFINITE);
|
|
if (ret != WAIT_OBJECT_0)
|
|
PrintError("WaitForSingleObject");
|
|
|
|
// Suspend the calling thread, dump his stack, and then resume him.
|
|
// He's currently waiting for us to finish so now should be a good time.
|
|
ret = ::SuspendThread( data->thread );
|
|
if (ret == -1) {
|
|
PrintError("ThreadSuspend");
|
|
}
|
|
else {
|
|
WalkStackMain64(data);
|
|
|
|
ret = ::ResumeThread(data->thread);
|
|
if (ret == -1) {
|
|
PrintError("ThreadResume");
|
|
}
|
|
}
|
|
|
|
::SetEvent(data->eventEnd);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Walk the stack, translating PC's found into strings and recording the
|
|
* chain in aBuffer. For this to work properly, the DLLs must be rebased
|
|
* so that the address in the file agrees with the address in memory.
|
|
* Otherwise StackWalk will return FALSE when it hits a frame in a DLL
|
|
* whose in memory address doesn't match its in-file address.
|
|
*/
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_StackWalk(NS_WalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void *aClosure, uintptr_t aThread)
|
|
{
|
|
MOZ_ASSERT(gCriticalAddress.mInit);
|
|
static HANDLE myProcess = NULL;
|
|
HANDLE myThread;
|
|
DWORD walkerReturn;
|
|
struct WalkStackData data;
|
|
|
|
if (!EnsureImageHlpInitialized())
|
|
return false;
|
|
|
|
HANDLE targetThread = ::GetCurrentThread();
|
|
data.walkCallingThread = true;
|
|
if (aThread) {
|
|
HANDLE threadToWalk = reinterpret_cast<HANDLE> (aThread);
|
|
// walkCallingThread indicates whether we are walking the caller's stack
|
|
data.walkCallingThread = (threadToWalk == targetThread);
|
|
targetThread = threadToWalk;
|
|
}
|
|
|
|
// Have to duplicate handle to get a real handle.
|
|
if (!myProcess) {
|
|
if (!::DuplicateHandle(::GetCurrentProcess(),
|
|
::GetCurrentProcess(),
|
|
::GetCurrentProcess(),
|
|
&myProcess,
|
|
PROCESS_ALL_ACCESS, FALSE, 0)) {
|
|
PrintError("DuplicateHandle (process)");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
}
|
|
if (!::DuplicateHandle(::GetCurrentProcess(),
|
|
targetThread,
|
|
::GetCurrentProcess(),
|
|
&myThread,
|
|
THREAD_ALL_ACCESS, FALSE, 0)) {
|
|
PrintError("DuplicateHandle (thread)");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
data.skipFrames = aSkipFrames;
|
|
data.thread = myThread;
|
|
data.process = myProcess;
|
|
void *local_pcs[1024];
|
|
data.pcs = local_pcs;
|
|
data.pc_count = 0;
|
|
data.pc_size = ArrayLength(local_pcs);
|
|
void *local_sps[1024];
|
|
data.sps = local_sps;
|
|
data.sp_count = 0;
|
|
data.sp_size = ArrayLength(local_pcs);
|
|
|
|
if (aThread) {
|
|
// If we're walking the stack of another thread, we don't need to
|
|
// use a separate walker thread.
|
|
WalkStackMain64(&data);
|
|
|
|
if (data.pc_count > data.pc_size) {
|
|
data.pcs = (void**) _alloca(data.pc_count * sizeof(void*));
|
|
data.pc_size = data.pc_count;
|
|
data.pc_count = 0;
|
|
data.sps = (void**) _alloca(data.sp_count * sizeof(void*));
|
|
data.sp_size = data.sp_count;
|
|
data.sp_count = 0;
|
|
WalkStackMain64(&data);
|
|
}
|
|
} else {
|
|
data.eventStart = ::CreateEvent(NULL, FALSE /* auto-reset*/,
|
|
FALSE /* initially non-signaled */, NULL);
|
|
data.eventEnd = ::CreateEvent(NULL, FALSE /* auto-reset*/,
|
|
FALSE /* initially non-signaled */, NULL);
|
|
|
|
::PostThreadMessage(gStackWalkThread, WM_USER, 0, (LPARAM)&data);
|
|
|
|
walkerReturn = ::SignalObjectAndWait(data.eventStart,
|
|
data.eventEnd, INFINITE, FALSE);
|
|
if (walkerReturn != WAIT_OBJECT_0)
|
|
PrintError("SignalObjectAndWait (1)");
|
|
if (data.pc_count > data.pc_size) {
|
|
data.pcs = (void**) _alloca(data.pc_count * sizeof(void*));
|
|
data.pc_size = data.pc_count;
|
|
data.pc_count = 0;
|
|
data.sps = (void**) _alloca(data.sp_count * sizeof(void*));
|
|
data.sp_size = data.sp_count;
|
|
data.sp_count = 0;
|
|
::PostThreadMessage(gStackWalkThread, WM_USER, 0, (LPARAM)&data);
|
|
walkerReturn = ::SignalObjectAndWait(data.eventStart,
|
|
data.eventEnd, INFINITE, FALSE);
|
|
if (walkerReturn != WAIT_OBJECT_0)
|
|
PrintError("SignalObjectAndWait (2)");
|
|
}
|
|
|
|
::CloseHandle(data.eventStart);
|
|
::CloseHandle(data.eventEnd);
|
|
}
|
|
|
|
::CloseHandle(myThread);
|
|
|
|
for (uint32_t i = 0; i < data.pc_count; ++i)
|
|
(*aCallback)(data.pcs[i], data.sps[i], aClosure);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
|
|
static BOOL CALLBACK callbackEspecial64(
|
|
PCSTR aModuleName,
|
|
DWORD64 aModuleBase,
|
|
ULONG aModuleSize,
|
|
PVOID aUserContext)
|
|
{
|
|
BOOL retval = TRUE;
|
|
DWORD64 addr = *(DWORD64*)aUserContext;
|
|
|
|
/*
|
|
* You'll want to control this if we are running on an
|
|
* architecture where the addresses go the other direction.
|
|
* Not sure this is even a realistic consideration.
|
|
*/
|
|
const BOOL addressIncreases = TRUE;
|
|
|
|
/*
|
|
* If it falls in side the known range, load the symbols.
|
|
*/
|
|
if (addressIncreases
|
|
? (addr >= aModuleBase && addr <= (aModuleBase + aModuleSize))
|
|
: (addr <= aModuleBase && addr >= (aModuleBase - aModuleSize))
|
|
) {
|
|
retval = SymLoadModule64(GetCurrentProcess(), NULL, (PSTR)aModuleName, NULL, aModuleBase, aModuleSize);
|
|
if (!retval)
|
|
PrintError("SymLoadModule64");
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* SymGetModuleInfoEspecial
|
|
*
|
|
* Attempt to determine the module information.
|
|
* Bug 112196 says this DLL may not have been loaded at the time
|
|
* SymInitialize was called, and thus the module information
|
|
* and symbol information is not available.
|
|
* This code rectifies that problem.
|
|
*/
|
|
|
|
// New members were added to IMAGEHLP_MODULE64 (that show up in the
|
|
// Platform SDK that ships with VC8, but not the Platform SDK that ships
|
|
// with VC7.1, i.e., between DbgHelp 6.0 and 6.1), but we don't need to
|
|
// use them, and it's useful to be able to function correctly with the
|
|
// older library. (Stock Windows XP SP2 seems to ship with dbghelp.dll
|
|
// version 5.1.) Since Platform SDK version need not correspond to
|
|
// compiler version, and the version number in debughlp.h was NOT bumped
|
|
// when these changes were made, ifdef based on a constant that was
|
|
// added between these versions.
|
|
#ifdef SSRVOPT_SETCONTEXT
|
|
#define NS_IMAGEHLP_MODULE64_SIZE (((offsetof(IMAGEHLP_MODULE64, LoadedPdbName) + sizeof(DWORD64) - 1) / sizeof(DWORD64)) * sizeof(DWORD64))
|
|
#else
|
|
#define NS_IMAGEHLP_MODULE64_SIZE sizeof(IMAGEHLP_MODULE64)
|
|
#endif
|
|
|
|
BOOL SymGetModuleInfoEspecial64(HANDLE aProcess, DWORD64 aAddr, PIMAGEHLP_MODULE64 aModuleInfo, PIMAGEHLP_LINE64 aLineInfo)
|
|
{
|
|
BOOL retval = FALSE;
|
|
|
|
/*
|
|
* Init the vars if we have em.
|
|
*/
|
|
aModuleInfo->SizeOfStruct = NS_IMAGEHLP_MODULE64_SIZE;
|
|
if (nullptr != aLineInfo) {
|
|
aLineInfo->SizeOfStruct = sizeof(IMAGEHLP_LINE64);
|
|
}
|
|
|
|
/*
|
|
* Give it a go.
|
|
* It may already be loaded.
|
|
*/
|
|
retval = SymGetModuleInfo64(aProcess, aAddr, aModuleInfo);
|
|
|
|
if (FALSE == retval) {
|
|
BOOL enumRes = FALSE;
|
|
|
|
/*
|
|
* Not loaded, here's the magic.
|
|
* Go through all the modules.
|
|
*/
|
|
// Need to cast to PENUMLOADED_MODULES_CALLBACK64 because the
|
|
// constness of the first parameter of
|
|
// PENUMLOADED_MODULES_CALLBACK64 varies over SDK versions (from
|
|
// non-const to const over time). See bug 391848 and bug
|
|
// 415426.
|
|
enumRes = EnumerateLoadedModules64(aProcess, (PENUMLOADED_MODULES_CALLBACK64)callbackEspecial64, (PVOID)&aAddr);
|
|
if (FALSE != enumRes)
|
|
{
|
|
/*
|
|
* One final go.
|
|
* If it fails, then well, we have other problems.
|
|
*/
|
|
retval = SymGetModuleInfo64(aProcess, aAddr, aModuleInfo);
|
|
if (!retval)
|
|
PrintError("SymGetModuleInfo64");
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If we got module info, we may attempt line info as well.
|
|
* We will not report failure if this does not work.
|
|
*/
|
|
if (FALSE != retval && nullptr != aLineInfo) {
|
|
DWORD displacement = 0;
|
|
BOOL lineRes = FALSE;
|
|
lineRes = SymGetLineFromAddr64(aProcess, aAddr, &displacement, aLineInfo);
|
|
if (!lineRes) {
|
|
// Clear out aLineInfo to indicate that it's not valid
|
|
memset(aLineInfo, 0, sizeof(*aLineInfo));
|
|
}
|
|
}
|
|
|
|
return retval;
|
|
}
|
|
|
|
bool
|
|
EnsureSymInitialized()
|
|
{
|
|
static bool gInitialized = false;
|
|
bool retStat;
|
|
|
|
if (gInitialized)
|
|
return gInitialized;
|
|
|
|
NS_TIME_FUNCTION;
|
|
|
|
if (!EnsureImageHlpInitialized())
|
|
return false;
|
|
|
|
SymSetOptions(SYMOPT_LOAD_LINES | SYMOPT_UNDNAME);
|
|
retStat = SymInitialize(GetCurrentProcess(), NULL, TRUE);
|
|
if (!retStat)
|
|
PrintError("SymInitialize");
|
|
|
|
gInitialized = retStat;
|
|
/* XXX At some point we need to arrange to call SymCleanup */
|
|
|
|
return retStat;
|
|
}
|
|
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_DescribeCodeAddress(void *aPC, nsCodeAddressDetails *aDetails)
|
|
{
|
|
aDetails->library[0] = '\0';
|
|
aDetails->loffset = 0;
|
|
aDetails->filename[0] = '\0';
|
|
aDetails->lineno = 0;
|
|
aDetails->function[0] = '\0';
|
|
aDetails->foffset = 0;
|
|
|
|
if (!EnsureSymInitialized())
|
|
return NS_ERROR_FAILURE;
|
|
|
|
HANDLE myProcess = ::GetCurrentProcess();
|
|
BOOL ok;
|
|
|
|
// debug routines are not threadsafe, so grab the lock.
|
|
EnterCriticalSection(&gDbgHelpCS);
|
|
|
|
//
|
|
// Attempt to load module info before we attempt to resolve the symbol.
|
|
// This just makes sure we get good info if available.
|
|
//
|
|
|
|
DWORD64 addr = (DWORD64)aPC;
|
|
IMAGEHLP_MODULE64 modInfo;
|
|
IMAGEHLP_LINE64 lineInfo;
|
|
BOOL modInfoRes;
|
|
modInfoRes = SymGetModuleInfoEspecial64(myProcess, addr, &modInfo, &lineInfo);
|
|
|
|
if (modInfoRes) {
|
|
PL_strncpyz(aDetails->library, modInfo.ModuleName,
|
|
sizeof(aDetails->library));
|
|
aDetails->loffset = (char*) aPC - (char*) modInfo.BaseOfImage;
|
|
|
|
if (lineInfo.FileName) {
|
|
PL_strncpyz(aDetails->filename, lineInfo.FileName,
|
|
sizeof(aDetails->filename));
|
|
aDetails->lineno = lineInfo.LineNumber;
|
|
}
|
|
}
|
|
|
|
ULONG64 buffer[(sizeof(SYMBOL_INFO) +
|
|
MAX_SYM_NAME*sizeof(TCHAR) + sizeof(ULONG64) - 1) / sizeof(ULONG64)];
|
|
PSYMBOL_INFO pSymbol = (PSYMBOL_INFO)buffer;
|
|
pSymbol->SizeOfStruct = sizeof(SYMBOL_INFO);
|
|
pSymbol->MaxNameLen = MAX_SYM_NAME;
|
|
|
|
DWORD64 displacement;
|
|
ok = SymFromAddr(myProcess, addr, &displacement, pSymbol);
|
|
|
|
if (ok) {
|
|
PL_strncpyz(aDetails->function, pSymbol->Name,
|
|
sizeof(aDetails->function));
|
|
aDetails->foffset = displacement;
|
|
}
|
|
|
|
LeaveCriticalSection(&gDbgHelpCS); // release our lock
|
|
return NS_OK;
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_FormatCodeAddressDetails(void *aPC, const nsCodeAddressDetails *aDetails,
|
|
char *aBuffer, uint32_t aBufferSize)
|
|
{
|
|
if (aDetails->function[0])
|
|
_snprintf(aBuffer, aBufferSize, "%s!%s+0x%016lX",
|
|
aDetails->library, aDetails->function, aDetails->foffset);
|
|
else
|
|
_snprintf(aBuffer, aBufferSize, "0x%016lX", aPC);
|
|
|
|
aBuffer[aBufferSize - 1] = '\0';
|
|
|
|
uint32_t len = strlen(aBuffer);
|
|
if (aDetails->filename[0]) {
|
|
_snprintf(aBuffer + len, aBufferSize - len, " (%s, line %d)\n",
|
|
aDetails->filename, aDetails->lineno);
|
|
} else {
|
|
aBuffer[len] = '\n';
|
|
if (++len != aBufferSize)
|
|
aBuffer[len] = '\0';
|
|
}
|
|
aBuffer[aBufferSize - 2] = '\n';
|
|
aBuffer[aBufferSize - 1] = '\0';
|
|
return NS_OK;
|
|
}
|
|
|
|
// WIN32 x86 stack walking code
|
|
// i386 or PPC Linux stackwalking code or Solaris
|
|
#elif HAVE_DLADDR && (HAVE__UNWIND_BACKTRACE || NSSTACKWALK_SUPPORTS_LINUX || NSSTACKWALK_SUPPORTS_SOLARIS || NSSTACKWALK_SUPPORTS_MACOSX)
|
|
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include "nscore.h"
|
|
#include <stdio.h>
|
|
#include "plstr.h"
|
|
|
|
// On glibc 2.1, the Dl_info api defined in <dlfcn.h> is only exposed
|
|
// if __USE_GNU is defined. I suppose its some kind of standards
|
|
// adherence thing.
|
|
//
|
|
#if (__GLIBC_MINOR__ >= 1) && !defined(__USE_GNU)
|
|
#define __USE_GNU
|
|
#endif
|
|
|
|
// This thing is exported by libstdc++
|
|
// Yes, this is a gcc only hack
|
|
#if defined(MOZ_DEMANGLE_SYMBOLS)
|
|
#include <cxxabi.h>
|
|
#include <stdlib.h> // for free()
|
|
#endif // MOZ_DEMANGLE_SYMBOLS
|
|
|
|
void DemangleSymbol(const char * aSymbol,
|
|
char * aBuffer,
|
|
int aBufLen)
|
|
{
|
|
aBuffer[0] = '\0';
|
|
|
|
#if defined(MOZ_DEMANGLE_SYMBOLS)
|
|
/* See demangle.h in the gcc source for the voodoo */
|
|
char * demangled = abi::__cxa_demangle(aSymbol,0,0,0);
|
|
|
|
if (demangled)
|
|
{
|
|
strncpy(aBuffer,demangled,aBufLen);
|
|
free(demangled);
|
|
}
|
|
#endif // MOZ_DEMANGLE_SYMBOLS
|
|
}
|
|
|
|
|
|
#if NSSTACKWALK_SUPPORTS_SOLARIS
|
|
|
|
/*
|
|
* Stack walking code for Solaris courtesy of Bart Smaalder's "memtrak".
|
|
*/
|
|
|
|
#include <synch.h>
|
|
#include <ucontext.h>
|
|
#include <sys/frame.h>
|
|
#include <sys/regset.h>
|
|
#include <sys/stack.h>
|
|
|
|
static int load_address ( void * pc, void * arg );
|
|
static struct bucket * newbucket ( void * pc );
|
|
static struct frame * cs_getmyframeptr ( void );
|
|
static void cs_walk_stack ( void * (*read_func)(char * address),
|
|
struct frame * fp,
|
|
int (*operate_func)(void *, void *, void *),
|
|
void * usrarg );
|
|
static void cs_operate ( void (*operate_func)(void *, void *, void *),
|
|
void * usrarg );
|
|
|
|
#ifndef STACK_BIAS
|
|
#define STACK_BIAS 0
|
|
#endif /*STACK_BIAS*/
|
|
|
|
#define LOGSIZE 4096
|
|
|
|
/* type of demangling function */
|
|
typedef int demf_t(const char *, char *, size_t);
|
|
|
|
static demf_t *demf;
|
|
|
|
static int initialized = 0;
|
|
|
|
#if defined(sparc) || defined(__sparc)
|
|
#define FRAME_PTR_REGISTER REG_SP
|
|
#endif
|
|
|
|
#if defined(i386) || defined(__i386)
|
|
#define FRAME_PTR_REGISTER EBP
|
|
#endif
|
|
|
|
struct bucket {
|
|
void * pc;
|
|
int index;
|
|
struct bucket * next;
|
|
};
|
|
|
|
struct my_user_args {
|
|
NS_WalkStackCallback callback;
|
|
uint32_t skipFrames;
|
|
void *closure;
|
|
};
|
|
|
|
|
|
static void myinit();
|
|
|
|
#pragma init (myinit)
|
|
|
|
static void
|
|
myinit()
|
|
{
|
|
|
|
if (! initialized) {
|
|
#ifndef __GNUC__
|
|
void *handle;
|
|
const char *libdem = "libdemangle.so.1";
|
|
|
|
/* load libdemangle if we can and need to (only try this once) */
|
|
if ((handle = dlopen(libdem, RTLD_LAZY)) != NULL) {
|
|
demf = (demf_t *)dlsym(handle,
|
|
"cplus_demangle"); /*lint !e611 */
|
|
/*
|
|
* lint override above is to prevent lint from
|
|
* complaining about "suspicious cast".
|
|
*/
|
|
}
|
|
#endif /*__GNUC__*/
|
|
}
|
|
initialized = 1;
|
|
}
|
|
|
|
|
|
static int
|
|
load_address(void * pc, void * arg )
|
|
{
|
|
static struct bucket table[2048];
|
|
static mutex_t lock;
|
|
struct bucket * ptr;
|
|
struct my_user_args * args = (struct my_user_args *) arg;
|
|
|
|
unsigned int val = NS_PTR_TO_INT32(pc);
|
|
|
|
ptr = table + ((val >> 2)&2047);
|
|
|
|
mutex_lock(&lock);
|
|
while (ptr->next) {
|
|
if (ptr->next->pc == pc)
|
|
break;
|
|
ptr = ptr->next;
|
|
}
|
|
|
|
if (ptr->next) {
|
|
mutex_unlock(&lock);
|
|
} else {
|
|
(args->callback)(pc, args->closure);
|
|
|
|
ptr->next = newbucket(pc);
|
|
mutex_unlock(&lock);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
static struct bucket *
|
|
newbucket(void * pc)
|
|
{
|
|
struct bucket * ptr = (struct bucket *) malloc(sizeof (*ptr));
|
|
static int index; /* protected by lock in caller */
|
|
|
|
ptr->index = index++;
|
|
ptr->next = NULL;
|
|
ptr->pc = pc;
|
|
return (ptr);
|
|
}
|
|
|
|
|
|
static struct frame *
|
|
csgetframeptr()
|
|
{
|
|
ucontext_t u;
|
|
struct frame *fp;
|
|
|
|
(void) getcontext(&u);
|
|
|
|
fp = (struct frame *)
|
|
((char *)u.uc_mcontext.gregs[FRAME_PTR_REGISTER] +
|
|
STACK_BIAS);
|
|
|
|
/* make sure to return parents frame pointer.... */
|
|
|
|
return ((struct frame *)((ulong_t)fp->fr_savfp + STACK_BIAS));
|
|
}
|
|
|
|
|
|
static void
|
|
cswalkstack(struct frame *fp, int (*operate_func)(void *, void *, void *),
|
|
void *usrarg)
|
|
{
|
|
|
|
while (fp != 0 && fp->fr_savpc != 0) {
|
|
|
|
if (operate_func((void *)fp->fr_savpc, NULL, usrarg) != 0)
|
|
break;
|
|
/*
|
|
* watch out - libthread stacks look funny at the top
|
|
* so they may not have their STACK_BIAS set
|
|
*/
|
|
|
|
fp = (struct frame *)((ulong_t)fp->fr_savfp +
|
|
(fp->fr_savfp?(ulong_t)STACK_BIAS:0));
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
cs_operate(int (*operate_func)(void *, void *, void *), void * usrarg)
|
|
{
|
|
cswalkstack(csgetframeptr(), operate_func, usrarg);
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_StackWalk(NS_WalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void *aClosure, uintptr_t aThread)
|
|
{
|
|
MOZ_ASSERT(gCriticalAddress.mInit);
|
|
MOZ_ASSERT(!aThread);
|
|
struct my_user_args args;
|
|
|
|
if (!initialized)
|
|
myinit();
|
|
|
|
args.callback = aCallback;
|
|
args.skipFrames = aSkipFrames; /* XXX Not handled! */
|
|
args.closure = aClosure;
|
|
cs_operate(load_address, &args);
|
|
return NS_OK;
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_DescribeCodeAddress(void *aPC, nsCodeAddressDetails *aDetails)
|
|
{
|
|
aDetails->library[0] = '\0';
|
|
aDetails->loffset = 0;
|
|
aDetails->filename[0] = '\0';
|
|
aDetails->lineno = 0;
|
|
aDetails->function[0] = '\0';
|
|
aDetails->foffset = 0;
|
|
|
|
char dembuff[4096];
|
|
Dl_info info;
|
|
|
|
if (dladdr(aPC, & info)) {
|
|
if (info.dli_fname) {
|
|
PL_strncpyz(aDetails->library, info.dli_fname,
|
|
sizeof(aDetails->library));
|
|
aDetails->loffset = (char*)aPC - (char*)info.dli_fbase;
|
|
}
|
|
if (info.dli_sname) {
|
|
aDetails->foffset = (char*)aPC - (char*)info.dli_saddr;
|
|
#ifdef __GNUC__
|
|
DemangleSymbol(info.dli_sname, dembuff, sizeof(dembuff));
|
|
#else
|
|
if (!demf || demf(info.dli_sname, dembuff, sizeof (dembuff)))
|
|
dembuff[0] = 0;
|
|
#endif /*__GNUC__*/
|
|
PL_strncpyz(aDetails->function,
|
|
(dembuff[0] != '\0') ? dembuff : info.dli_sname,
|
|
sizeof(aDetails->function));
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_FormatCodeAddressDetails(void *aPC, const nsCodeAddressDetails *aDetails,
|
|
char *aBuffer, uint32_t aBufferSize)
|
|
{
|
|
snprintf(aBuffer, aBufferSize, "%p %s:%s+0x%lx\n",
|
|
aPC,
|
|
aDetails->library[0] ? aDetails->library : "??",
|
|
aDetails->function[0] ? aDetails->function : "??",
|
|
aDetails->foffset);
|
|
return NS_OK;
|
|
}
|
|
|
|
#else // not __sun-specific
|
|
|
|
#if __GLIBC__ > 2 || __GLIBC_MINOR > 1
|
|
#define HAVE___LIBC_STACK_END 1
|
|
#else
|
|
#define HAVE___LIBC_STACK_END 0
|
|
#endif
|
|
|
|
#if HAVE___LIBC_STACK_END
|
|
extern void *__libc_stack_end; // from ld-linux.so
|
|
#endif
|
|
namespace mozilla {
|
|
nsresult
|
|
FramePointerStackWalk(NS_WalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void *aClosure, void **bp, void *aStackEnd)
|
|
{
|
|
// Stack walking code courtesy Kipp's "leaky".
|
|
|
|
int skip = aSkipFrames;
|
|
while (1) {
|
|
void **next = (void**)*bp;
|
|
// bp may not be a frame pointer on i386 if code was compiled with
|
|
// -fomit-frame-pointer, so do some sanity checks.
|
|
// (bp should be a frame pointer on ppc(64) but checking anyway may help
|
|
// a little if the stack has been corrupted.)
|
|
// We don't need to check against the begining of the stack because
|
|
// we can assume that bp > sp
|
|
if (next <= bp ||
|
|
next > aStackEnd ||
|
|
(long(next) & 3)) {
|
|
break;
|
|
}
|
|
#if (defined(__ppc__) && defined(XP_MACOSX)) || defined(__powerpc64__)
|
|
// ppc mac or powerpc64 linux
|
|
void *pc = *(bp+2);
|
|
bp += 3;
|
|
#else // i386 or powerpc32 linux
|
|
void *pc = *(bp+1);
|
|
bp += 2;
|
|
#endif
|
|
if (IsCriticalAddress(pc)) {
|
|
printf("Aborting stack trace, PC is critical\n");
|
|
return NS_ERROR_UNEXPECTED;
|
|
}
|
|
if (--skip < 0) {
|
|
// Assume that the SP points to the BP of the function
|
|
// it called. We can't know the exact location of the SP
|
|
// but this should be sufficient for our use the SP
|
|
// to order elements on the stack.
|
|
(*aCallback)(pc, bp, aClosure);
|
|
}
|
|
bp = next;
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
}
|
|
|
|
#define X86_OR_PPC (defined(__i386) || defined(PPC) || defined(__ppc__))
|
|
#if X86_OR_PPC && (NSSTACKWALK_SUPPORTS_MACOSX || NSSTACKWALK_SUPPORTS_LINUX) // i386 or PPC Linux or Mac stackwalking code
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_StackWalk(NS_WalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void *aClosure, uintptr_t aThread)
|
|
{
|
|
MOZ_ASSERT(gCriticalAddress.mInit);
|
|
MOZ_ASSERT(!aThread);
|
|
|
|
// Get the frame pointer
|
|
void **bp;
|
|
#if defined(__i386)
|
|
__asm__( "movl %%ebp, %0" : "=g"(bp));
|
|
#else
|
|
// It would be nice if this worked uniformly, but at least on i386 and
|
|
// x86_64, it stopped working with gcc 4.1, because it points to the
|
|
// end of the saved registers instead of the start.
|
|
bp = (void**) __builtin_frame_address(0);
|
|
#endif
|
|
|
|
void *stackEnd;
|
|
#if HAVE___LIBC_STACK_END
|
|
stackEnd = __libc_stack_end;
|
|
#else
|
|
stackEnd = reinterpret_cast<void*>(-1);
|
|
#endif
|
|
return FramePointerStackWalk(aCallback, aSkipFrames,
|
|
aClosure, bp, stackEnd);
|
|
|
|
}
|
|
|
|
#elif defined(HAVE__UNWIND_BACKTRACE)
|
|
|
|
// libgcc_s.so symbols _Unwind_Backtrace@@GCC_3.3 and _Unwind_GetIP@@GCC_3.0
|
|
#define _GNU_SOURCE
|
|
#include <unwind.h>
|
|
|
|
struct unwind_info {
|
|
NS_WalkStackCallback callback;
|
|
int skip;
|
|
void *closure;
|
|
};
|
|
|
|
static _Unwind_Reason_Code
|
|
unwind_callback (struct _Unwind_Context *context, void *closure)
|
|
{
|
|
unwind_info *info = static_cast<unwind_info *>(closure);
|
|
void *pc = reinterpret_cast<void *>(_Unwind_GetIP(context));
|
|
// TODO Use something like '_Unwind_GetGR()' to get the stack pointer.
|
|
if (IsCriticalAddress(pc)) {
|
|
printf("Aborting stack trace, PC is critical\n");
|
|
/* We just want to stop the walk, so any error code will do.
|
|
Using _URC_NORMAL_STOP would probably be the most accurate,
|
|
but it is not defined on Android for ARM. */
|
|
return _URC_FOREIGN_EXCEPTION_CAUGHT;
|
|
}
|
|
if (--info->skip < 0)
|
|
(*info->callback)(pc, NULL, info->closure);
|
|
return _URC_NO_REASON;
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_StackWalk(NS_WalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void *aClosure, uintptr_t aThread)
|
|
{
|
|
MOZ_ASSERT(gCriticalAddress.mInit);
|
|
MOZ_ASSERT(!aThread);
|
|
unwind_info info;
|
|
info.callback = aCallback;
|
|
info.skip = aSkipFrames + 1;
|
|
info.closure = aClosure;
|
|
|
|
_Unwind_Reason_Code t = _Unwind_Backtrace(unwind_callback, &info);
|
|
if (t != _URC_END_OF_STACK)
|
|
return NS_ERROR_UNEXPECTED;
|
|
return NS_OK;
|
|
}
|
|
|
|
#endif
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_DescribeCodeAddress(void *aPC, nsCodeAddressDetails *aDetails)
|
|
{
|
|
aDetails->library[0] = '\0';
|
|
aDetails->loffset = 0;
|
|
aDetails->filename[0] = '\0';
|
|
aDetails->lineno = 0;
|
|
aDetails->function[0] = '\0';
|
|
aDetails->foffset = 0;
|
|
|
|
Dl_info info;
|
|
int ok = dladdr(aPC, &info);
|
|
if (!ok) {
|
|
return NS_OK;
|
|
}
|
|
|
|
PL_strncpyz(aDetails->library, info.dli_fname, sizeof(aDetails->library));
|
|
aDetails->loffset = (char*)aPC - (char*)info.dli_fbase;
|
|
|
|
const char * symbol = info.dli_sname;
|
|
int len;
|
|
if (!symbol || !(len = strlen(symbol))) {
|
|
return NS_OK;
|
|
}
|
|
|
|
char demangled[4096] = "\0";
|
|
|
|
DemangleSymbol(symbol, demangled, sizeof(demangled));
|
|
|
|
if (strlen(demangled)) {
|
|
symbol = demangled;
|
|
len = strlen(symbol);
|
|
}
|
|
|
|
PL_strncpyz(aDetails->function, symbol, sizeof(aDetails->function));
|
|
aDetails->foffset = (char*)aPC - (char*)info.dli_saddr;
|
|
return NS_OK;
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_FormatCodeAddressDetails(void *aPC, const nsCodeAddressDetails *aDetails,
|
|
char *aBuffer, uint32_t aBufferSize)
|
|
{
|
|
if (!aDetails->library[0]) {
|
|
snprintf(aBuffer, aBufferSize, "UNKNOWN %p\n", aPC);
|
|
} else if (!aDetails->function[0]) {
|
|
snprintf(aBuffer, aBufferSize, "UNKNOWN [%s +0x%08lX]\n",
|
|
aDetails->library, aDetails->loffset);
|
|
} else {
|
|
snprintf(aBuffer, aBufferSize, "%s+0x%08lX [%s +0x%08lX]\n",
|
|
aDetails->function, aDetails->foffset,
|
|
aDetails->library, aDetails->loffset);
|
|
}
|
|
return NS_OK;
|
|
}
|
|
|
|
#endif
|
|
|
|
#else // unsupported platform.
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_StackWalk(NS_WalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void *aClosure, uintptr_t aThread)
|
|
{
|
|
MOZ_ASSERT(gCriticalAddress.mInit);
|
|
MOZ_ASSERT(!aThread);
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
namespace mozilla {
|
|
nsresult
|
|
FramePointerStackWalk(NS_WalkStackCallback aCallback, uint32_t aSkipFrames,
|
|
void *aClosure, void **bp)
|
|
{
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_DescribeCodeAddress(void *aPC, nsCodeAddressDetails *aDetails)
|
|
{
|
|
aDetails->library[0] = '\0';
|
|
aDetails->loffset = 0;
|
|
aDetails->filename[0] = '\0';
|
|
aDetails->lineno = 0;
|
|
aDetails->function[0] = '\0';
|
|
aDetails->foffset = 0;
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
EXPORT_XPCOM_API(nsresult)
|
|
NS_FormatCodeAddressDetails(void *aPC, const nsCodeAddressDetails *aDetails,
|
|
char *aBuffer, uint32_t aBufferSize)
|
|
{
|
|
aBuffer[0] = '\0';
|
|
return NS_ERROR_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
#endif
|