mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
316 lines
10 KiB
C++
316 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* 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/. */
|
|
|
|
// System
|
|
#include <string>
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <ostream>
|
|
#include <fstream>
|
|
#include <sstream>
|
|
#if defined(ANDROID)
|
|
# include "android-signal-defs.h"
|
|
#endif
|
|
|
|
// Profiler
|
|
#include "PlatformMacros.h"
|
|
#include "GeckoProfilerImpl.h"
|
|
#include "platform.h"
|
|
#include "nsXULAppAPI.h"
|
|
#include "nsThreadUtils.h"
|
|
#include "prenv.h"
|
|
#include "shared-libraries.h"
|
|
#include "mozilla/StackWalk.h"
|
|
#include "ProfileEntry.h"
|
|
#include "SaveProfileTask.h"
|
|
#include "UnwinderThread2.h"
|
|
#include "TableTicker.h"
|
|
|
|
// JSON
|
|
#include "JSObjectBuilder.h"
|
|
#include "nsIJSRuntimeService.h"
|
|
|
|
// Meta
|
|
#include "nsXPCOM.h"
|
|
#include "nsXPCOMCID.h"
|
|
#include "nsIHttpProtocolHandler.h"
|
|
#include "nsServiceManagerUtils.h"
|
|
#include "nsIXULRuntime.h"
|
|
#include "nsIXULAppInfo.h"
|
|
#include "nsDirectoryServiceUtils.h"
|
|
#include "nsDirectoryServiceDefs.h"
|
|
#include "nsIObserverService.h"
|
|
#include "mozilla/Services.h"
|
|
|
|
// JS
|
|
#include "js/OldDebugAPI.h"
|
|
|
|
// This file's exports are listed in GeckoProfilerImpl.h.
|
|
|
|
/* These will be set to something sensible before we take the first
|
|
sample. */
|
|
UnwMode sUnwindMode = UnwINVALID;
|
|
int sUnwindInterval = 0;
|
|
int sUnwindStackScan = 0;
|
|
int sProfileEntries = 0;
|
|
|
|
using std::string;
|
|
using namespace mozilla;
|
|
|
|
#if _MSC_VER
|
|
#define snprintf _snprintf
|
|
#endif
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// BEGIN take samples.
|
|
// Everything in this section RUNS IN SIGHANDLER CONTEXT
|
|
|
|
// RUNS IN SIGHANDLER CONTEXT
|
|
static
|
|
void genProfileEntry(/*MODIFIED*/UnwinderThreadBuffer* utb,
|
|
volatile StackEntry &entry,
|
|
PseudoStack *stack, void *lastpc)
|
|
{
|
|
int lineno = -1;
|
|
|
|
// Add a pseudostack-entry start label
|
|
utb__addEntry( utb, ProfileEntry('h', 'P') );
|
|
// And the SP value, if it is non-zero
|
|
if (entry.stackAddress() != 0) {
|
|
utb__addEntry( utb, ProfileEntry('S', entry.stackAddress()) );
|
|
}
|
|
|
|
// First entry has tagName 's' (start)
|
|
// Check for magic pointer bit 1 to indicate copy
|
|
const char* sampleLabel = entry.label();
|
|
if (entry.isCopyLabel()) {
|
|
// Store the string using 1 or more 'd' (dynamic) tags
|
|
// that will happen to the preceding tag
|
|
|
|
utb__addEntry( utb, ProfileEntry('c', "") );
|
|
// Add one to store the null termination
|
|
size_t strLen = strlen(sampleLabel) + 1;
|
|
for (size_t j = 0; j < strLen;) {
|
|
// Store as many characters in the void* as the platform allows
|
|
char text[sizeof(void*)];
|
|
for (size_t pos = 0; pos < sizeof(void*) && j+pos < strLen; pos++) {
|
|
text[pos] = sampleLabel[j+pos];
|
|
}
|
|
j += sizeof(void*)/sizeof(char);
|
|
// Cast to *((void**) to pass the text data to a void*
|
|
utb__addEntry( utb, ProfileEntry('d', *((void**)(&text[0]))) );
|
|
}
|
|
if (entry.js()) {
|
|
if (!entry.pc()) {
|
|
// The JIT only allows the top-most entry to have a NULL pc
|
|
MOZ_ASSERT(&entry == &stack->mStack[stack->stackSize() - 1]);
|
|
// If stack-walking was disabled, then that's just unfortunate
|
|
if (lastpc) {
|
|
jsbytecode *jspc = js::ProfilingGetPC(stack->mRuntime, entry.script(),
|
|
lastpc);
|
|
if (jspc) {
|
|
lineno = JS_PCToLineNumber(NULL, entry.script(), jspc);
|
|
}
|
|
}
|
|
} else {
|
|
lineno = JS_PCToLineNumber(NULL, entry.script(), entry.pc());
|
|
}
|
|
} else {
|
|
lineno = entry.line();
|
|
}
|
|
} else {
|
|
utb__addEntry( utb, ProfileEntry('c', sampleLabel) );
|
|
lineno = entry.line();
|
|
}
|
|
if (lineno != -1) {
|
|
utb__addEntry( utb, ProfileEntry('n', lineno) );
|
|
}
|
|
|
|
// Add a pseudostack-entry end label
|
|
utb__addEntry( utb, ProfileEntry('h', 'Q') );
|
|
}
|
|
|
|
// RUNS IN SIGHANDLER CONTEXT
|
|
// Generate pseudo-backtrace entries and put them in |utb|, with
|
|
// the order outermost frame first.
|
|
void genPseudoBacktraceEntries(/*MODIFIED*/UnwinderThreadBuffer* utb,
|
|
PseudoStack *aStack, TickSample *sample)
|
|
{
|
|
// Call genProfileEntry to generate tags for each profile
|
|
// entry. Each entry will be bounded by a 'h' 'P' tag to
|
|
// mark the start and a 'h' 'Q' tag to mark the end.
|
|
uint32_t nInStack = aStack->stackSize();
|
|
for (uint32_t i = 0; i < nInStack; i++) {
|
|
genProfileEntry(utb, aStack->mStack[i], aStack, nullptr);
|
|
}
|
|
# ifdef ENABLE_SPS_LEAF_DATA
|
|
if (sample) {
|
|
utb__addEntry( utb, ProfileEntry('l', (void*)sample->pc) );
|
|
# ifdef ENABLE_ARM_LR_SAVING
|
|
utb__addEntry( utb, ProfileEntry('L', (void*)sample->lr) );
|
|
# endif
|
|
}
|
|
# endif
|
|
}
|
|
|
|
// RUNS IN SIGHANDLER CONTEXT
|
|
void TableTicker::UnwinderTick(TickSample* sample)
|
|
{
|
|
if (!sample->threadProfile) {
|
|
// Platform doesn't support multithread, so use the main thread profile we created
|
|
sample->threadProfile = GetPrimaryThreadProfile();
|
|
}
|
|
|
|
ThreadProfile& currThreadProfile = *sample->threadProfile;
|
|
|
|
/* Get hold of an empty inter-thread buffer into which to park
|
|
the ProfileEntries for this sample. */
|
|
UnwinderThreadBuffer* utb = uwt__acquire_empty_buffer();
|
|
|
|
/* This could fail, if no buffers are currently available, in which
|
|
case we must give up right away. We cannot wait for a buffer to
|
|
become available, as that risks deadlock. */
|
|
if (!utb)
|
|
return;
|
|
|
|
/* Manufacture the ProfileEntries that we will give to the unwinder
|
|
thread, and park them in |utb|. */
|
|
|
|
// Marker(s) come before the sample
|
|
PseudoStack* stack = currThreadProfile.GetPseudoStack();
|
|
ProfilerMarkerLinkedList* pendingMarkersList = stack->getPendingMarkers();
|
|
while (pendingMarkersList && pendingMarkersList->peek()) {
|
|
ProfilerMarker* marker = pendingMarkersList->popHead();
|
|
stack->addStoredMarker(marker);
|
|
utb__addEntry( utb, ProfileEntry('m', marker) );
|
|
}
|
|
stack->updateGeneration(currThreadProfile.GetGenerationID());
|
|
|
|
bool recordSample = true;
|
|
if (mJankOnly) {
|
|
// if we are on a different event we can discard any temporary samples
|
|
// we've kept around
|
|
if (sLastSampledEventGeneration != sCurrentEventGeneration) {
|
|
// XXX: we also probably want to add an entry to the profile to help
|
|
// distinguish which samples are part of the same event. That, or record
|
|
// the event generation in each sample
|
|
currThreadProfile.erase();
|
|
}
|
|
sLastSampledEventGeneration = sCurrentEventGeneration;
|
|
|
|
recordSample = false;
|
|
// only record the events when we have a we haven't seen a tracer
|
|
// event for 100ms
|
|
if (!sLastTracerEvent.IsNull()) {
|
|
TimeDuration delta = sample->timestamp - sLastTracerEvent;
|
|
if (delta.ToMilliseconds() > 100.0) {
|
|
recordSample = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
// JRS 2012-Sept-27: this logic used to involve mUseStackWalk.
|
|
// That should be reinstated, but for the moment, use the
|
|
// settings in sUnwindMode and sUnwindInterval.
|
|
// Add a native-backtrace request, or add pseudo backtrace entries,
|
|
// or both.
|
|
switch (sUnwindMode) {
|
|
case UnwNATIVE: /* Native only */
|
|
// add a "do native stack trace now" hint. This will be actioned
|
|
// by the unwinder thread as it processes the entries in this
|
|
// sample.
|
|
utb__addEntry( utb, ProfileEntry('h'/*hint*/, 'N'/*native-trace*/) );
|
|
break;
|
|
case UnwPSEUDO: /* Pseudo only */
|
|
/* Add into |utb|, the pseudo backtrace entries */
|
|
genPseudoBacktraceEntries(utb, stack, sample);
|
|
break;
|
|
case UnwCOMBINED: /* Both Native and Pseudo */
|
|
utb__addEntry( utb, ProfileEntry('h'/*hint*/, 'N'/*native-trace*/) );
|
|
genPseudoBacktraceEntries(utb, stack, sample);
|
|
break;
|
|
case UnwINVALID:
|
|
default:
|
|
MOZ_CRASH();
|
|
}
|
|
|
|
if (recordSample) {
|
|
// add a "flush now" hint
|
|
utb__addEntry( utb, ProfileEntry('h'/*hint*/, 'F'/*flush*/) );
|
|
}
|
|
|
|
// Add any extras
|
|
if (!sLastTracerEvent.IsNull() && sample) {
|
|
TimeDuration delta = sample->timestamp - sLastTracerEvent;
|
|
utb__addEntry( utb, ProfileEntry('r', delta.ToMilliseconds()) );
|
|
}
|
|
|
|
if (sample) {
|
|
TimeDuration delta = sample->timestamp - sStartTime;
|
|
utb__addEntry( utb, ProfileEntry('t', delta.ToMilliseconds()) );
|
|
}
|
|
|
|
if (sLastFrameNumber != sFrameNumber) {
|
|
utb__addEntry( utb, ProfileEntry('f', sFrameNumber) );
|
|
sLastFrameNumber = sFrameNumber;
|
|
}
|
|
|
|
/* So now we have, in |utb|, the complete set of entries we want to
|
|
push into the circular buffer. This may also include a 'h' 'F'
|
|
entry, which is "flush now" hint, and/or a 'h' 'N' entry, which
|
|
is a "generate a native backtrace and add it to the buffer right
|
|
now" hint. Hand them off to the helper thread, together with
|
|
stack and register context needed to do a native unwind, if that
|
|
is currently enabled. */
|
|
|
|
/* If a native unwind has been requested, we'll start it off using
|
|
the context obtained from the signal handler, to avoid the
|
|
problem of having to unwind through the signal frame itself. */
|
|
|
|
/* On Linux and Android, the initial register state is in the
|
|
supplied sample->context. But on MacOS it's not, so we have to
|
|
fake it up here (sigh). */
|
|
if (sUnwindMode == UnwNATIVE || sUnwindMode == UnwCOMBINED) {
|
|
# if defined(SPS_PLAT_amd64_linux) || defined(SPS_PLAT_arm_android) \
|
|
|| defined(SPS_PLAT_x86_linux) || defined(SPS_PLAT_x86_android)
|
|
void* ucV = (void*)sample->context;
|
|
# elif defined(SPS_PLAT_amd64_darwin)
|
|
struct __darwin_mcontext64 mc;
|
|
memset(&mc, 0, sizeof(mc));
|
|
ucontext_t uc;
|
|
memset(&uc, 0, sizeof(uc));
|
|
uc.uc_mcontext = &mc;
|
|
mc.__ss.__rip = (uint64_t)sample->pc;
|
|
mc.__ss.__rsp = (uint64_t)sample->sp;
|
|
mc.__ss.__rbp = (uint64_t)sample->fp;
|
|
void* ucV = (void*)&uc;
|
|
# elif defined(SPS_PLAT_x86_darwin)
|
|
struct __darwin_mcontext32 mc;
|
|
memset(&mc, 0, sizeof(mc));
|
|
ucontext_t uc;
|
|
memset(&uc, 0, sizeof(uc));
|
|
uc.uc_mcontext = &mc;
|
|
mc.__ss.__eip = (uint32_t)sample->pc;
|
|
mc.__ss.__esp = (uint32_t)sample->sp;
|
|
mc.__ss.__ebp = (uint32_t)sample->fp;
|
|
void* ucV = (void*)&uc;
|
|
# elif defined(SPS_OS_windows)
|
|
/* Totally fake this up so it at least builds. No idea if we can
|
|
even ever get here on Windows. */
|
|
void* ucV = NULL;
|
|
# else
|
|
# error "Unsupported platform"
|
|
# endif
|
|
uwt__release_full_buffer(&currThreadProfile, utb, ucV);
|
|
} else {
|
|
uwt__release_full_buffer(&currThreadProfile, utb, NULL);
|
|
}
|
|
}
|
|
|
|
// END take samples
|
|
////////////////////////////////////////////////////////////////////////
|
|
|