mirror of
https://github.com/mozilla/gecko-dev.git
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691 lines
20 KiB
C++
691 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include <ostream>
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#include <sstream>
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#include "platform.h"
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#include "nsThreadUtils.h"
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#include "nsXULAppAPI.h"
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// JS
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#include "jsapi.h"
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#include "js/TrackedOptimizationInfo.h"
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// JSON
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#include "JSStreamWriter.h"
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// Self
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#include "ProfileEntry.h"
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#if defined(_MSC_VER) && _MSC_VER < 1900
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#define snprintf _snprintf
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#endif
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////////////////////////////////////////////////////////////////////////
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// BEGIN ProfileEntry
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ProfileEntry::ProfileEntry()
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: mTagData(nullptr)
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, mTagName(0)
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{ }
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// aTagData must not need release (i.e. be a string from the text segment)
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ProfileEntry::ProfileEntry(char aTagName, const char *aTagData)
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: mTagData(aTagData)
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, mTagName(aTagName)
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{ }
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ProfileEntry::ProfileEntry(char aTagName, ProfilerMarker *aTagMarker)
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: mTagMarker(aTagMarker)
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, mTagName(aTagName)
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{ }
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ProfileEntry::ProfileEntry(char aTagName, void *aTagPtr)
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: mTagPtr(aTagPtr)
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, mTagName(aTagName)
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{ }
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ProfileEntry::ProfileEntry(char aTagName, float aTagFloat)
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: mTagFloat(aTagFloat)
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, mTagName(aTagName)
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{ }
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ProfileEntry::ProfileEntry(char aTagName, uintptr_t aTagOffset)
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: mTagOffset(aTagOffset)
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, mTagName(aTagName)
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{ }
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ProfileEntry::ProfileEntry(char aTagName, Address aTagAddress)
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: mTagAddress(aTagAddress)
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, mTagName(aTagName)
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{ }
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ProfileEntry::ProfileEntry(char aTagName, int aTagInt)
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: mTagInt(aTagInt)
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, mTagName(aTagName)
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{ }
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ProfileEntry::ProfileEntry(char aTagName, char aTagChar)
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: mTagChar(aTagChar)
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, mTagName(aTagName)
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{ }
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bool ProfileEntry::is_ent_hint(char hintChar) {
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return mTagName == 'h' && mTagChar == hintChar;
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}
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bool ProfileEntry::is_ent_hint() {
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return mTagName == 'h';
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}
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bool ProfileEntry::is_ent(char tagChar) {
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return mTagName == tagChar;
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}
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void* ProfileEntry::get_tagPtr() {
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// No consistency checking. Oh well.
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return mTagPtr;
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}
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void ProfileEntry::log()
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{
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// There is no compiler enforced mapping between tag chars
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// and union variant fields, so the following was derived
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// by looking through all the use points of TableTicker.cpp.
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// mTagMarker (ProfilerMarker*) m
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// mTagData (const char*) c,s
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// mTagPtr (void*) d,l,L,B (immediate backtrace), S(start-of-stack),
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// J (JIT code addr)
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// mTagInt (int) n,f,y,o (JIT optimization info index), T (thread id)
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// mTagChar (char) h
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// mTagFloat (double) r,t,p,R (resident memory), U (unshared memory)
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switch (mTagName) {
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case 'm':
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LOGF("%c \"%s\"", mTagName, mTagMarker->GetMarkerName()); break;
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case 'c': case 's':
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LOGF("%c \"%s\"", mTagName, mTagData); break;
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case 'd': case 'l': case 'L': case 'J': case 'B': case 'S':
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LOGF("%c %p", mTagName, mTagPtr); break;
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case 'n': case 'f': case 'y': case 'o': case 'T':
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LOGF("%c %d", mTagName, mTagInt); break;
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case 'h':
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LOGF("%c \'%c\'", mTagName, mTagChar); break;
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case 'r': case 't': case 'p': case 'R': case 'U':
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LOGF("%c %f", mTagName, mTagFloat); break;
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default:
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LOGF("'%c' unknown_tag", mTagName); break;
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}
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}
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std::ostream& operator<<(std::ostream& stream, const ProfileEntry& entry)
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{
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if (entry.mTagName == 'r' || entry.mTagName == 't') {
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stream << entry.mTagName << "-" << std::fixed << entry.mTagFloat << "\n";
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} else if (entry.mTagName == 'l' || entry.mTagName == 'L') {
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// Bug 739800 - Force l-tag addresses to have a "0x" prefix on all platforms
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// Additionally, stringstream seemed to be ignoring formatter flags.
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char tagBuff[1024];
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unsigned long long pc = (unsigned long long)(uintptr_t)entry.mTagPtr;
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snprintf(tagBuff, 1024, "%c-%#llx\n", entry.mTagName, pc);
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stream << tagBuff;
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} else if (entry.mTagName == 'd') {
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// TODO implement 'd' tag for text profile
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} else {
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stream << entry.mTagName << "-" << entry.mTagData << "\n";
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}
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return stream;
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}
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// END ProfileEntry
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////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////
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// BEGIN ProfileBuffer
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ProfileBuffer::ProfileBuffer(int aEntrySize)
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: mEntries(MakeUnique<ProfileEntry[]>(aEntrySize))
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, mWritePos(0)
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, mReadPos(0)
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, mEntrySize(aEntrySize)
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, mGeneration(0)
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{
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}
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// Called from signal, call only reentrant functions
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void ProfileBuffer::addTag(const ProfileEntry& aTag)
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{
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mEntries[mWritePos++] = aTag;
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if (mWritePos == mEntrySize) {
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mGeneration++;
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mWritePos = 0;
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}
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if (mWritePos == mReadPos) {
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// Keep one slot open.
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mEntries[mReadPos] = ProfileEntry();
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mReadPos = (mReadPos + 1) % mEntrySize;
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}
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}
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void ProfileBuffer::addStoredMarker(ProfilerMarker *aStoredMarker) {
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aStoredMarker->SetGeneration(mGeneration);
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mStoredMarkers.insert(aStoredMarker);
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}
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void ProfileBuffer::deleteExpiredStoredMarkers() {
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// Delete markers of samples that have been overwritten due to circular
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// buffer wraparound.
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int generation = mGeneration;
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while (mStoredMarkers.peek() &&
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mStoredMarkers.peek()->HasExpired(generation)) {
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delete mStoredMarkers.popHead();
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}
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}
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#define DYNAMIC_MAX_STRING 512
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char* ProfileBuffer::processDynamicTag(int readPos,
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int* tagsConsumed, char* tagBuff)
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{
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int readAheadPos = (readPos + 1) % mEntrySize;
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int tagBuffPos = 0;
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// Read the string stored in mTagData until the null character is seen
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bool seenNullByte = false;
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while (readAheadPos != mWritePos && !seenNullByte) {
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(*tagsConsumed)++;
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ProfileEntry readAheadEntry = mEntries[readAheadPos];
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for (size_t pos = 0; pos < sizeof(void*); pos++) {
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tagBuff[tagBuffPos] = readAheadEntry.mTagChars[pos];
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if (tagBuff[tagBuffPos] == '\0' || tagBuffPos == DYNAMIC_MAX_STRING-2) {
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seenNullByte = true;
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break;
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}
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tagBuffPos++;
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}
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if (!seenNullByte)
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readAheadPos = (readAheadPos + 1) % mEntrySize;
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}
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return tagBuff;
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}
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void ProfileBuffer::IterateTagsForThread(IterateTagsCallback aCallback, int aThreadId)
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{
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MOZ_ASSERT(aCallback);
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int readPos = mReadPos;
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int currentThreadID = -1;
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while (readPos != mWritePos) {
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const ProfileEntry& entry = mEntries[readPos];
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if (entry.mTagName == 'T') {
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currentThreadID = entry.mTagInt;
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readPos = (readPos + 1) % mEntrySize;
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continue;
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}
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// Number of tags consumed
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int incBy = 1;
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// Read ahead to the next tag, if it's a 'd' tag process it now
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const char* tagStringData = entry.mTagData;
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int readAheadPos = (readPos + 1) % mEntrySize;
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char tagBuff[DYNAMIC_MAX_STRING];
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// Make sure the string is always null terminated if it fills up DYNAMIC_MAX_STRING-2
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tagBuff[DYNAMIC_MAX_STRING-1] = '\0';
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if (readAheadPos != mWritePos && mEntries[readAheadPos].mTagName == 'd') {
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tagStringData = processDynamicTag(readPos, &incBy, tagBuff);
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}
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if (currentThreadID == aThreadId) {
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aCallback(entry, tagStringData);
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}
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readPos = (readPos + incBy) % mEntrySize;
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}
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}
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class StreamOptimizationTypeInfoOp : public JS::ForEachTrackedOptimizationTypeInfoOp
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{
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JSStreamWriter& mWriter;
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bool mStartedTypeList;
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public:
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explicit StreamOptimizationTypeInfoOp(JSStreamWriter& b)
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: mWriter(b)
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, mStartedTypeList(false)
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{ }
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void readType(const char *keyedBy, const char *name,
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const char *location, unsigned lineno) MOZ_OVERRIDE {
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if (!mStartedTypeList) {
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mStartedTypeList = true;
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mWriter.BeginObject();
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mWriter.Name("types");
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mWriter.BeginArray();
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}
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mWriter.BeginObject();
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mWriter.NameValue("keyedBy", keyedBy);
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mWriter.NameValue("name", name);
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if (location) {
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mWriter.NameValue("location", location);
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mWriter.NameValue("line", lineno);
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}
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mWriter.EndObject();
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}
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void operator()(JS::TrackedTypeSite site, const char *mirType) MOZ_OVERRIDE {
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if (mStartedTypeList) {
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mWriter.EndArray();
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mStartedTypeList = false;
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} else {
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mWriter.BeginObject();
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}
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mWriter.NameValue("site", JS::TrackedTypeSiteString(site));
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mWriter.NameValue("mirType", mirType);
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mWriter.EndObject();
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}
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};
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class StreamOptimizationAttemptsOp : public JS::ForEachTrackedOptimizationAttemptOp
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{
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JSStreamWriter& mWriter;
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public:
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explicit StreamOptimizationAttemptsOp(JSStreamWriter& b)
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: mWriter(b)
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{ }
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void operator()(JS::TrackedStrategy strategy, JS::TrackedOutcome outcome) MOZ_OVERRIDE {
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mWriter.BeginObject();
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{
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// Stringify the reasons for now; could stream enum values in the future
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// to save space.
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mWriter.NameValue("strategy", JS::TrackedStrategyString(strategy));
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mWriter.NameValue("outcome", JS::TrackedOutcomeString(outcome));
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}
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mWriter.EndObject();
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}
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};
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void ProfileBuffer::StreamSamplesToJSObject(JSStreamWriter& b, int aThreadId, JSRuntime* rt)
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{
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b.BeginArray();
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bool sample = false;
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int readPos = mReadPos;
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int currentThreadID = -1;
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while (readPos != mWritePos) {
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ProfileEntry entry = mEntries[readPos];
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if (entry.mTagName == 'T') {
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currentThreadID = entry.mTagInt;
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}
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if (currentThreadID == aThreadId) {
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switch (entry.mTagName) {
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case 'r':
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{
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if (sample) {
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b.NameValue("responsiveness", entry.mTagFloat);
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}
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}
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break;
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case 'p':
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{
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if (sample) {
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b.NameValue("power", entry.mTagFloat);
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}
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}
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break;
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case 'R':
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{
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if (sample) {
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b.NameValue("rss", entry.mTagFloat);
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}
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}
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break;
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case 'U':
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{
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if (sample) {
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b.NameValue("uss", entry.mTagFloat);
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}
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}
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break;
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case 'f':
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{
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if (sample) {
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b.NameValue("frameNumber", entry.mTagInt);
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}
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}
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break;
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case 't':
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{
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if (sample) {
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b.NameValue("time", entry.mTagFloat);
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}
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}
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break;
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case 's':
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{
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// end the previous sample if there was one
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if (sample) {
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b.EndObject();
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}
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// begin the next sample
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b.BeginObject();
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sample = true;
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// Seek forward through the entire sample, looking for frames
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// this is an easier approach to reason about than adding more
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// control variables and cases to the loop that goes through the buffer once
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b.Name("frames");
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b.BeginArray();
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b.BeginObject();
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b.NameValue("location", "(root)");
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b.EndObject();
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int framePos = (readPos + 1) % mEntrySize;
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ProfileEntry frame = mEntries[framePos];
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while (framePos != mWritePos && frame.mTagName != 's' && frame.mTagName != 'T') {
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int incBy = 1;
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frame = mEntries[framePos];
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// Read ahead to the next tag, if it's a 'd' tag process it now
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const char* tagStringData = frame.mTagData;
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int readAheadPos = (framePos + 1) % mEntrySize;
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char tagBuff[DYNAMIC_MAX_STRING];
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// Make sure the string is always null terminated if it fills up
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// DYNAMIC_MAX_STRING-2
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tagBuff[DYNAMIC_MAX_STRING-1] = '\0';
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if (readAheadPos != mWritePos && mEntries[readAheadPos].mTagName == 'd') {
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tagStringData = processDynamicTag(framePos, &incBy, tagBuff);
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}
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// Write one frame. It can have either
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// 1. only location - 'l' containing a memory address
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// 2. location and line number - 'c' followed by 'd's,
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// an optional 'n' and an optional 'y'
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if (frame.mTagName == 'l') {
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b.BeginObject();
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// Bug 753041
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// We need a double cast here to tell GCC that we don't want to sign
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// extend 32-bit addresses starting with 0xFXXXXXX.
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unsigned long long pc = (unsigned long long)(uintptr_t)frame.mTagPtr;
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snprintf(tagBuff, DYNAMIC_MAX_STRING, "%#llx", pc);
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b.NameValue("location", tagBuff);
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b.EndObject();
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} else if (frame.mTagName == 'c') {
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b.BeginObject();
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b.NameValue("location", tagStringData);
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readAheadPos = (framePos + incBy) % mEntrySize;
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if (readAheadPos != mWritePos &&
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mEntries[readAheadPos].mTagName == 'n') {
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b.NameValue("line", mEntries[readAheadPos].mTagInt);
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incBy++;
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}
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readAheadPos = (framePos + incBy) % mEntrySize;
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if (readAheadPos != mWritePos &&
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mEntries[readAheadPos].mTagName == 'y') {
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b.NameValue("category", mEntries[readAheadPos].mTagInt);
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incBy++;
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}
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readAheadPos = (framePos + incBy) % mEntrySize;
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if (readAheadPos != mWritePos &&
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mEntries[readAheadPos].mTagName == 'J') {
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void* pc = mEntries[readAheadPos].mTagPtr;
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incBy++;
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readAheadPos = (framePos + incBy) % mEntrySize;
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MOZ_ASSERT(readAheadPos != mWritePos &&
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mEntries[readAheadPos].mTagName == 'o');
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uint32_t index = mEntries[readAheadPos].mTagInt;
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// TODOshu: cannot stream tracked optimization info if
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// the JS engine has already shut down when streaming.
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if (rt) {
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b.Name("opts");
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b.BeginArray();
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StreamOptimizationTypeInfoOp typeInfoOp(b);
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JS::ForEachTrackedOptimizationTypeInfo(rt, pc, index, typeInfoOp);
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StreamOptimizationAttemptsOp attemptOp(b);
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JS::ForEachTrackedOptimizationAttempt(rt, pc, index, attemptOp);
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b.EndArray();
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}
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}
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b.EndObject();
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}
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framePos = (framePos + incBy) % mEntrySize;
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}
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b.EndArray();
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}
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break;
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}
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}
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readPos = (readPos + 1) % mEntrySize;
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}
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if (sample) {
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b.EndObject();
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}
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b.EndArray();
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}
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void ProfileBuffer::StreamMarkersToJSObject(JSStreamWriter& b, int aThreadId)
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{
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b.BeginArray();
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int readPos = mReadPos;
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int currentThreadID = -1;
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while (readPos != mWritePos) {
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ProfileEntry entry = mEntries[readPos];
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if (entry.mTagName == 'T') {
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currentThreadID = entry.mTagInt;
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} else if (currentThreadID == aThreadId && entry.mTagName == 'm') {
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entry.getMarker()->StreamJSObject(b);
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}
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readPos = (readPos + 1) % mEntrySize;
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}
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b.EndArray();
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}
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int ProfileBuffer::FindLastSampleOfThread(int aThreadId)
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{
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// We search backwards from mWritePos-1 to mReadPos.
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// Adding mEntrySize makes the result of the modulus positive.
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for (int readPos = (mWritePos + mEntrySize - 1) % mEntrySize;
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readPos != (mReadPos + mEntrySize - 1) % mEntrySize;
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readPos = (readPos + mEntrySize - 1) % mEntrySize) {
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ProfileEntry entry = mEntries[readPos];
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if (entry.mTagName == 'T' && entry.mTagInt == aThreadId) {
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return readPos;
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}
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}
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return -1;
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}
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void ProfileBuffer::DuplicateLastSample(int aThreadId)
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{
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int lastSampleStartPos = FindLastSampleOfThread(aThreadId);
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if (lastSampleStartPos == -1) {
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return;
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}
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|
|
MOZ_ASSERT(mEntries[lastSampleStartPos].mTagName == 'T');
|
|
|
|
addTag(mEntries[lastSampleStartPos]);
|
|
|
|
// Go through the whole entry and duplicate it, until we find the next one.
|
|
for (int readPos = (lastSampleStartPos + 1) % mEntrySize;
|
|
readPos != mWritePos;
|
|
readPos = (readPos + 1) % mEntrySize) {
|
|
switch (mEntries[readPos].mTagName) {
|
|
case 'T':
|
|
// We're done.
|
|
return;
|
|
case 't':
|
|
// Copy with new time
|
|
addTag(ProfileEntry('t', static_cast<float>((mozilla::TimeStamp::Now() - sStartTime).ToMilliseconds())));
|
|
break;
|
|
case 'm':
|
|
// Don't copy markers
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
std::ostream&
|
|
ProfileBuffer::StreamToOStream(std::ostream& stream, int aThreadId) const
|
|
{
|
|
int readPos = mReadPos;
|
|
int currentThreadID = -1;
|
|
while (readPos != mWritePos) {
|
|
ProfileEntry entry = mEntries[readPos];
|
|
if (entry.mTagName == 'T') {
|
|
currentThreadID = entry.mTagInt;
|
|
} else if (currentThreadID == aThreadId) {
|
|
stream << mEntries[readPos];
|
|
}
|
|
readPos = (readPos + 1) % mEntrySize;
|
|
}
|
|
return stream;
|
|
}
|
|
|
|
// END ProfileBuffer
|
|
////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// BEGIN ThreadProfile
|
|
|
|
ThreadProfile::ThreadProfile(ThreadInfo* aInfo, ProfileBuffer* aBuffer)
|
|
: mThreadInfo(aInfo)
|
|
, mBuffer(aBuffer)
|
|
, mPseudoStack(aInfo->Stack())
|
|
, mMutex("ThreadProfile::mMutex")
|
|
, mThreadId(int(aInfo->ThreadId()))
|
|
, mIsMainThread(aInfo->IsMainThread())
|
|
, mPlatformData(aInfo->GetPlatformData())
|
|
, mStackTop(aInfo->StackTop())
|
|
, mRespInfo(this)
|
|
#ifdef XP_LINUX
|
|
, mRssMemory(0)
|
|
, mUssMemory(0)
|
|
#endif
|
|
{
|
|
MOZ_COUNT_CTOR(ThreadProfile);
|
|
MOZ_ASSERT(aBuffer);
|
|
|
|
// I don't know if we can assert this. But we should warn.
|
|
MOZ_ASSERT(aInfo->ThreadId() >= 0, "native thread ID is < 0");
|
|
MOZ_ASSERT(aInfo->ThreadId() <= INT32_MAX, "native thread ID is > INT32_MAX");
|
|
}
|
|
|
|
ThreadProfile::~ThreadProfile()
|
|
{
|
|
MOZ_COUNT_DTOR(ThreadProfile);
|
|
}
|
|
|
|
void ThreadProfile::addTag(const ProfileEntry& aTag)
|
|
{
|
|
mBuffer->addTag(aTag);
|
|
}
|
|
|
|
void ThreadProfile::addStoredMarker(ProfilerMarker *aStoredMarker) {
|
|
mBuffer->addStoredMarker(aStoredMarker);
|
|
}
|
|
|
|
void ThreadProfile::IterateTags(IterateTagsCallback aCallback)
|
|
{
|
|
mBuffer->IterateTagsForThread(aCallback, mThreadId);
|
|
}
|
|
|
|
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 if (XRE_GetProcessType() == GeckoProcessType_Content) {
|
|
// This isn't going to really help once we have multiple content
|
|
// processes, but it'll do for now.
|
|
b.NameValue("name", "Content");
|
|
} else {
|
|
b.NameValue("name", Name());
|
|
}
|
|
b.NameValue("tid", static_cast<int>(mThreadId));
|
|
|
|
b.Name("samples");
|
|
mBuffer->StreamSamplesToJSObject(b, mThreadId, mPseudoStack->mRuntime);
|
|
|
|
b.Name("markers");
|
|
mBuffer->StreamMarkersToJSObject(b, mThreadId);
|
|
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()
|
|
{
|
|
mBuffer->DuplicateLastSample(mThreadId);
|
|
}
|
|
|
|
std::ostream& operator<<(std::ostream& stream, const ThreadProfile& profile)
|
|
{
|
|
return profile.mBuffer->StreamToOStream(stream, profile.mThreadId);
|
|
}
|
|
|
|
// END ThreadProfile
|
|
////////////////////////////////////////////////////////////////////////
|