mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-10 15:33:23 +00:00
559 lines
16 KiB
C++
559 lines
16 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/. */
|
|
|
|
#include <ostream>
|
|
#include <sstream>
|
|
#include "platform.h"
|
|
#include "nsThreadUtils.h"
|
|
#include "nsXULAppAPI.h"
|
|
#include "jsapi.h"
|
|
|
|
// JSON
|
|
#include "JSStreamWriter.h"
|
|
|
|
// Self
|
|
#include "ProfileEntry.h"
|
|
|
|
#if _MSC_VER
|
|
#define snprintf _snprintf
|
|
#endif
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// BEGIN ProfileEntry
|
|
|
|
ProfileEntry::ProfileEntry()
|
|
: mTagData(nullptr)
|
|
, mTagName(0)
|
|
{ }
|
|
|
|
// aTagData must not need release (i.e. be a string from the text segment)
|
|
ProfileEntry::ProfileEntry(char aTagName, const char *aTagData)
|
|
: mTagData(aTagData)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
ProfileEntry::ProfileEntry(char aTagName, ProfilerMarker *aTagMarker)
|
|
: mTagMarker(aTagMarker)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
ProfileEntry::ProfileEntry(char aTagName, void *aTagPtr)
|
|
: mTagPtr(aTagPtr)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
ProfileEntry::ProfileEntry(char aTagName, float aTagFloat)
|
|
: mTagFloat(aTagFloat)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
ProfileEntry::ProfileEntry(char aTagName, uintptr_t aTagOffset)
|
|
: mTagOffset(aTagOffset)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
ProfileEntry::ProfileEntry(char aTagName, Address aTagAddress)
|
|
: mTagAddress(aTagAddress)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
ProfileEntry::ProfileEntry(char aTagName, int aTagInt)
|
|
: mTagInt(aTagInt)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
ProfileEntry::ProfileEntry(char aTagName, char aTagChar)
|
|
: mTagChar(aTagChar)
|
|
, mTagName(aTagName)
|
|
{ }
|
|
|
|
bool ProfileEntry::is_ent_hint(char hintChar) {
|
|
return mTagName == 'h' && mTagChar == hintChar;
|
|
}
|
|
|
|
bool ProfileEntry::is_ent_hint() {
|
|
return mTagName == 'h';
|
|
}
|
|
|
|
bool ProfileEntry::is_ent(char tagChar) {
|
|
return mTagName == tagChar;
|
|
}
|
|
|
|
void* ProfileEntry::get_tagPtr() {
|
|
// No consistency checking. Oh well.
|
|
return mTagPtr;
|
|
}
|
|
|
|
void ProfileEntry::log()
|
|
{
|
|
// There is no compiler enforced mapping between tag chars
|
|
// and union variant fields, so the following was derived
|
|
// by looking through all the use points of TableTicker.cpp.
|
|
// mTagMarker (ProfilerMarker*) m
|
|
// mTagData (const char*) c,s
|
|
// mTagPtr (void*) d,l,L,B (immediate backtrace), S(start-of-stack)
|
|
// mTagInt (int) n,f,y
|
|
// mTagChar (char) h
|
|
// mTagFloat (double) r,t,p,R (resident memory), U (unshared memory)
|
|
switch (mTagName) {
|
|
case 'm':
|
|
LOGF("%c \"%s\"", mTagName, mTagMarker->GetMarkerName()); break;
|
|
case 'c': case 's':
|
|
LOGF("%c \"%s\"", mTagName, mTagData); break;
|
|
case 'd': case 'l': case 'L': case 'B': case 'S':
|
|
LOGF("%c %p", mTagName, mTagPtr); break;
|
|
case 'n': case 'f': case 'y':
|
|
LOGF("%c %d", mTagName, mTagInt); break;
|
|
case 'h':
|
|
LOGF("%c \'%c\'", mTagName, mTagChar); break;
|
|
case 'r': case 't': case 'p': case 'R': case 'U':
|
|
LOGF("%c %f", mTagName, mTagFloat); break;
|
|
default:
|
|
LOGF("'%c' unknown_tag", mTagName); break;
|
|
}
|
|
}
|
|
|
|
std::ostream& operator<<(std::ostream& stream, const ProfileEntry& entry)
|
|
{
|
|
if (entry.mTagName == 'r' || entry.mTagName == 't') {
|
|
stream << entry.mTagName << "-" << std::fixed << entry.mTagFloat << "\n";
|
|
} else if (entry.mTagName == 'l' || entry.mTagName == 'L') {
|
|
// Bug 739800 - Force l-tag addresses to have a "0x" prefix on all platforms
|
|
// Additionally, stringstream seemed to be ignoring formatter flags.
|
|
char tagBuff[1024];
|
|
unsigned long long pc = (unsigned long long)(uintptr_t)entry.mTagPtr;
|
|
snprintf(tagBuff, 1024, "%c-%#llx\n", entry.mTagName, pc);
|
|
stream << tagBuff;
|
|
} else if (entry.mTagName == 'd') {
|
|
// TODO implement 'd' tag for text profile
|
|
} else {
|
|
stream << entry.mTagName << "-" << entry.mTagData << "\n";
|
|
}
|
|
return stream;
|
|
}
|
|
|
|
// END ProfileEntry
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// BEGIN ThreadProfile
|
|
|
|
#define DYNAMIC_MAX_STRING 512
|
|
|
|
ThreadProfile::ThreadProfile(ThreadInfo* aInfo, int aEntrySize)
|
|
: mThreadInfo(aInfo)
|
|
, mWritePos(0)
|
|
, mLastFlushPos(0)
|
|
, mReadPos(0)
|
|
, mEntrySize(aEntrySize)
|
|
, mPseudoStack(aInfo->Stack())
|
|
, mMutex("ThreadProfile::mMutex")
|
|
, mThreadId(aInfo->ThreadId())
|
|
, mIsMainThread(aInfo->IsMainThread())
|
|
, mPlatformData(aInfo->GetPlatformData())
|
|
, mGeneration(0)
|
|
, mPendingGenerationFlush(0)
|
|
, mStackTop(aInfo->StackTop())
|
|
, mRespInfo(MOZ_THIS_IN_INITIALIZER_LIST())
|
|
#ifdef XP_LINUX
|
|
, mRssMemory(0)
|
|
, mUssMemory(0)
|
|
#endif
|
|
{
|
|
MOZ_COUNT_CTOR(ThreadProfile);
|
|
mEntries = new ProfileEntry[mEntrySize];
|
|
}
|
|
|
|
ThreadProfile::~ThreadProfile()
|
|
{
|
|
MOZ_COUNT_DTOR(ThreadProfile);
|
|
delete[] mEntries;
|
|
}
|
|
|
|
void ThreadProfile::addTag(ProfileEntry aTag)
|
|
{
|
|
// Called from signal, call only reentrant functions
|
|
mEntries[mWritePos] = aTag;
|
|
mWritePos = mWritePos + 1;
|
|
if (mWritePos >= mEntrySize) {
|
|
mPendingGenerationFlush++;
|
|
mWritePos = mWritePos % mEntrySize;
|
|
}
|
|
if (mWritePos == mReadPos) {
|
|
// Keep one slot open
|
|
mEntries[mReadPos] = ProfileEntry();
|
|
mReadPos = (mReadPos + 1) % mEntrySize;
|
|
}
|
|
// we also need to move the flush pos to ensure we
|
|
// do not pass it
|
|
if (mWritePos == mLastFlushPos) {
|
|
mLastFlushPos = (mLastFlushPos + 1) % mEntrySize;
|
|
}
|
|
}
|
|
|
|
// flush the new entries
|
|
void ThreadProfile::flush()
|
|
{
|
|
mLastFlushPos = mWritePos;
|
|
mGeneration += mPendingGenerationFlush;
|
|
mPendingGenerationFlush = 0;
|
|
}
|
|
|
|
// discards all of the entries since the last flush()
|
|
// NOTE: that if mWritePos happens to wrap around past
|
|
// mLastFlushPos we actually only discard mWritePos - mLastFlushPos entries
|
|
//
|
|
// r = mReadPos
|
|
// w = mWritePos
|
|
// f = mLastFlushPos
|
|
//
|
|
// r f w
|
|
// |-----------------------------|
|
|
// | abcdefghijklmnopq | -> 'abcdefghijklmnopq'
|
|
// |-----------------------------|
|
|
//
|
|
//
|
|
// mWritePos and mReadPos have passed mLastFlushPos
|
|
// f
|
|
// w r
|
|
// |-----------------------------|
|
|
// |ABCDEFGHIJKLMNOPQRSqrstuvwxyz|
|
|
// |-----------------------------|
|
|
// w
|
|
// r
|
|
// |-----------------------------|
|
|
// |ABCDEFGHIJKLMNOPQRSqrstuvwxyz| -> ''
|
|
// |-----------------------------|
|
|
//
|
|
//
|
|
// mWritePos will end up the same as mReadPos
|
|
// r
|
|
// w f
|
|
// |-----------------------------|
|
|
// |ABCDEFGHIJKLMklmnopqrstuvwxyz|
|
|
// |-----------------------------|
|
|
// r
|
|
// w
|
|
// |-----------------------------|
|
|
// |ABCDEFGHIJKLMklmnopqrstuvwxyz| -> ''
|
|
// |-----------------------------|
|
|
//
|
|
//
|
|
// mWritePos has moved past mReadPos
|
|
// w r f
|
|
// |-----------------------------|
|
|
// |ABCDEFdefghijklmnopqrstuvwxyz|
|
|
// |-----------------------------|
|
|
// r w
|
|
// |-----------------------------|
|
|
// |ABCDEFdefghijklmnopqrstuvwxyz| -> 'defghijkl'
|
|
// |-----------------------------|
|
|
|
|
void ThreadProfile::erase()
|
|
{
|
|
mWritePos = mLastFlushPos;
|
|
mPendingGenerationFlush = 0;
|
|
}
|
|
|
|
char* ThreadProfile::processDynamicTag(int readPos,
|
|
int* tagsConsumed, char* tagBuff)
|
|
{
|
|
int readAheadPos = (readPos + 1) % mEntrySize;
|
|
int tagBuffPos = 0;
|
|
|
|
// Read the string stored in mTagData until the null character is seen
|
|
bool seenNullByte = false;
|
|
while (readAheadPos != mLastFlushPos && !seenNullByte) {
|
|
(*tagsConsumed)++;
|
|
ProfileEntry readAheadEntry = mEntries[readAheadPos];
|
|
for (size_t pos = 0; pos < sizeof(void*); pos++) {
|
|
tagBuff[tagBuffPos] = readAheadEntry.mTagChars[pos];
|
|
if (tagBuff[tagBuffPos] == '\0' || tagBuffPos == DYNAMIC_MAX_STRING-2) {
|
|
seenNullByte = true;
|
|
break;
|
|
}
|
|
tagBuffPos++;
|
|
}
|
|
if (!seenNullByte)
|
|
readAheadPos = (readAheadPos + 1) % mEntrySize;
|
|
}
|
|
return tagBuff;
|
|
}
|
|
|
|
void ThreadProfile::IterateTags(IterateTagsCallback aCallback)
|
|
{
|
|
MOZ_ASSERT(aCallback);
|
|
|
|
int readPos = mReadPos;
|
|
while (readPos != mLastFlushPos) {
|
|
// Number of tag consumed
|
|
int incBy = 1;
|
|
const ProfileEntry& entry = mEntries[readPos];
|
|
|
|
// Read ahead to the next tag, if it's a 'd' tag process it now
|
|
const char* tagStringData = entry.mTagData;
|
|
int readAheadPos = (readPos + 1) % mEntrySize;
|
|
char tagBuff[DYNAMIC_MAX_STRING];
|
|
// Make sure the string is always null terminated if it fills up DYNAMIC_MAX_STRING-2
|
|
tagBuff[DYNAMIC_MAX_STRING-1] = '\0';
|
|
|
|
if (readAheadPos != mLastFlushPos && mEntries[readAheadPos].mTagName == 'd') {
|
|
tagStringData = processDynamicTag(readPos, &incBy, tagBuff);
|
|
}
|
|
|
|
aCallback(entry, tagStringData);
|
|
|
|
readPos = (readPos + incBy) % mEntrySize;
|
|
}
|
|
}
|
|
|
|
void ThreadProfile::ToStreamAsJSON(std::ostream& stream)
|
|
{
|
|
JSStreamWriter b(stream);
|
|
StreamJSObject(b);
|
|
}
|
|
|
|
void ThreadProfile::StreamJSObject(JSStreamWriter& b)
|
|
{
|
|
b.BeginObject();
|
|
// Thread meta data
|
|
if (XRE_GetProcessType() == GeckoProcessType_Plugin) {
|
|
// TODO Add the proper plugin name
|
|
b.NameValue("name", "Plugin");
|
|
} else {
|
|
b.NameValue("name", Name());
|
|
}
|
|
b.NameValue("tid", static_cast<int>(mThreadId));
|
|
|
|
b.Name("samples");
|
|
b.BeginArray();
|
|
|
|
bool sample = false;
|
|
int readPos = mReadPos;
|
|
while (readPos != mLastFlushPos) {
|
|
// Number of tag consumed
|
|
ProfileEntry entry = mEntries[readPos];
|
|
|
|
switch (entry.mTagName) {
|
|
case 'r':
|
|
{
|
|
if (sample) {
|
|
b.NameValue("responsiveness", entry.mTagFloat);
|
|
}
|
|
}
|
|
break;
|
|
case 'p':
|
|
{
|
|
if (sample) {
|
|
b.NameValue("power", entry.mTagFloat);
|
|
}
|
|
}
|
|
break;
|
|
case 'R':
|
|
{
|
|
if (sample) {
|
|
b.NameValue("rss", entry.mTagFloat);
|
|
}
|
|
}
|
|
break;
|
|
case 'U':
|
|
{
|
|
if (sample) {
|
|
b.NameValue("uss", entry.mTagFloat);
|
|
}
|
|
}
|
|
break;
|
|
case 'f':
|
|
{
|
|
if (sample) {
|
|
b.NameValue("frameNumber", entry.mTagInt);
|
|
}
|
|
}
|
|
break;
|
|
case 't':
|
|
{
|
|
if (sample) {
|
|
b.NameValue("time", entry.mTagFloat);
|
|
}
|
|
}
|
|
break;
|
|
case 's':
|
|
{
|
|
// end the previous sample if there was one
|
|
if (sample) {
|
|
b.EndObject();
|
|
}
|
|
// begin the next sample
|
|
b.BeginObject();
|
|
|
|
sample = true;
|
|
|
|
// Seek forward through the entire sample, looking for frames
|
|
// this is an easier approach to reason about than adding more
|
|
// control variables and cases to the loop that goes through the buffer once
|
|
b.Name("frames");
|
|
b.BeginArray();
|
|
|
|
b.BeginObject();
|
|
b.NameValue("location", "(root)");
|
|
b.EndObject();
|
|
|
|
int framePos = (readPos + 1) % mEntrySize;
|
|
ProfileEntry frame = mEntries[framePos];
|
|
while (framePos != mLastFlushPos && frame.mTagName != 's') {
|
|
int incBy = 1;
|
|
frame = mEntries[framePos];
|
|
|
|
// Read ahead to the next tag, if it's a 'd' tag process it now
|
|
const char* tagStringData = frame.mTagData;
|
|
int readAheadPos = (framePos + 1) % mEntrySize;
|
|
char tagBuff[DYNAMIC_MAX_STRING];
|
|
// Make sure the string is always null terminated if it fills up
|
|
// DYNAMIC_MAX_STRING-2
|
|
tagBuff[DYNAMIC_MAX_STRING-1] = '\0';
|
|
|
|
if (readAheadPos != mLastFlushPos && mEntries[readAheadPos].mTagName == 'd') {
|
|
tagStringData = processDynamicTag(framePos, &incBy, tagBuff);
|
|
}
|
|
|
|
// Write one frame. It can have either
|
|
// 1. only location - 'l' containing a memory address
|
|
// 2. location and line number - 'c' followed by 'd's,
|
|
// an optional 'n' and an optional 'y'
|
|
if (frame.mTagName == 'l') {
|
|
b.BeginObject();
|
|
// Bug 753041
|
|
// We need a double cast here to tell GCC that we don't want to sign
|
|
// extend 32-bit addresses starting with 0xFXXXXXX.
|
|
unsigned long long pc = (unsigned long long)(uintptr_t)frame.mTagPtr;
|
|
snprintf(tagBuff, DYNAMIC_MAX_STRING, "%#llx", pc);
|
|
b.NameValue("location", tagBuff);
|
|
b.EndObject();
|
|
} else if (frame.mTagName == 'c') {
|
|
b.BeginObject();
|
|
b.NameValue("location", tagStringData);
|
|
readAheadPos = (framePos + incBy) % mEntrySize;
|
|
if (readAheadPos != mLastFlushPos &&
|
|
mEntries[readAheadPos].mTagName == 'n') {
|
|
b.NameValue("line", mEntries[readAheadPos].mTagInt);
|
|
incBy++;
|
|
}
|
|
readAheadPos = (framePos + incBy) % mEntrySize;
|
|
if (readAheadPos != mLastFlushPos &&
|
|
mEntries[readAheadPos].mTagName == 'y') {
|
|
b.NameValue("category", mEntries[readAheadPos].mTagInt);
|
|
incBy++;
|
|
}
|
|
b.EndObject();
|
|
}
|
|
framePos = (framePos + incBy) % mEntrySize;
|
|
}
|
|
b.EndArray();
|
|
}
|
|
break;
|
|
}
|
|
readPos = (readPos + 1) % mEntrySize;
|
|
}
|
|
if (sample) {
|
|
b.EndObject();
|
|
}
|
|
b.EndArray();
|
|
|
|
b.Name("markers");
|
|
b.BeginArray();
|
|
readPos = mReadPos;
|
|
while (readPos != mLastFlushPos) {
|
|
ProfileEntry entry = mEntries[readPos];
|
|
if (entry.mTagName == 'm') {
|
|
entry.getMarker()->StreamJSObject(b);
|
|
}
|
|
readPos = (readPos + 1) % mEntrySize;
|
|
}
|
|
b.EndArray();
|
|
b.EndObject();
|
|
}
|
|
|
|
JSObject* ThreadProfile::ToJSObject(JSContext *aCx)
|
|
{
|
|
JS::RootedValue val(aCx);
|
|
std::stringstream ss;
|
|
{
|
|
// Define a scope to prevent a moving GC during ~JSStreamWriter from
|
|
// trashing the return value.
|
|
JSStreamWriter b(ss);
|
|
StreamJSObject(b);
|
|
NS_ConvertUTF8toUTF16 js_string(nsDependentCString(ss.str().c_str()));
|
|
JS_ParseJSON(aCx, static_cast<const char16_t*>(js_string.get()),
|
|
js_string.Length(), &val);
|
|
}
|
|
return &val.toObject();
|
|
}
|
|
|
|
PseudoStack* ThreadProfile::GetPseudoStack()
|
|
{
|
|
return mPseudoStack;
|
|
}
|
|
|
|
void ThreadProfile::BeginUnwind()
|
|
{
|
|
mMutex.Lock();
|
|
}
|
|
|
|
void ThreadProfile::EndUnwind()
|
|
{
|
|
mMutex.Unlock();
|
|
}
|
|
|
|
mozilla::Mutex* ThreadProfile::GetMutex()
|
|
{
|
|
return &mMutex;
|
|
}
|
|
|
|
void ThreadProfile::DuplicateLastSample() {
|
|
// Scan the whole buffer (even unflushed parts)
|
|
// Adding mEntrySize makes the result of the modulus positive
|
|
// We search backwards from mWritePos-1 to mReadPos
|
|
for (int readPos = (mWritePos + mEntrySize - 1) % mEntrySize;
|
|
readPos != (mReadPos + mEntrySize - 1) % mEntrySize;
|
|
readPos = (readPos + mEntrySize - 1) % mEntrySize) {
|
|
if (mEntries[readPos].mTagName == 's') {
|
|
// Found the start of the last entry at position readPos
|
|
int copyEndIdx = mWritePos;
|
|
// Go through the whole entry and duplicate it
|
|
for (;readPos != copyEndIdx; readPos = (readPos + 1) % mEntrySize) {
|
|
switch (mEntries[readPos].mTagName) {
|
|
// Copy with new time
|
|
case 't':
|
|
addTag(ProfileEntry('t', static_cast<float>((mozilla::TimeStamp::Now() - sStartTime).ToMilliseconds())));
|
|
break;
|
|
// Don't copy markers
|
|
case 'm':
|
|
break;
|
|
// Copy anything else we don't know about
|
|
// L, B, S, c, s, d, l, f, h, r, t, p
|
|
default:
|
|
addTag(mEntries[readPos]);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::ostream& operator<<(std::ostream& stream, const ThreadProfile& profile)
|
|
{
|
|
int readPos = profile.mReadPos;
|
|
while (readPos != profile.mLastFlushPos) {
|
|
stream << profile.mEntries[readPos];
|
|
readPos = (readPos + 1) % profile.mEntrySize;
|
|
}
|
|
return stream;
|
|
}
|
|
|
|
// END ThreadProfile
|
|
////////////////////////////////////////////////////////////////////////
|