gecko-dev/xpcom/ds/nsTimelineService.cpp

612 строки
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C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsTimelineService.h"
#include "prlong.h"
#include "prprf.h"
#include "prenv.h"
#include "plhash.h"
#include "prlock.h"
#include "prinit.h"
#include "prinrval.h"
#include "prthread.h"
#ifdef MOZ_TIMELINE
#define MAXINDENT 20
#ifdef XP_MAC
static PRIntervalTime initInterval = 0;
#endif
static PRFileDesc *timelineFD = PR_STDERR;
static PRBool gTimelineDisabled = PR_TRUE;
// Notes about threading:
// We avoid locks as we always use thread-local-storage.
// This means every other thread has its own private copy of
// data, and this thread can't re-enter (as our implemenation
// doesn't call back out anywhere). Thus, we can avoid locks!
// TLS index
static const PRUintn BAD_TLS_INDEX = (PRUintn) -1;
static PRUintn gTLSIndex = BAD_TLS_INDEX;
class TimelineThreadData {
public:
TimelineThreadData() : initTime(0), indent(0),
disabled(PR_TRUE), timers(nsnull) {}
~TimelineThreadData() {if (timers) PL_HashTableDestroy(timers);}
PRTime initTime;
PRHashTable *timers;
int indent;
PRBool disabled;
};
/* Implementation file */
NS_IMPL_THREADSAFE_ISUPPORTS1(nsTimelineService, nsITimelineService)
static PRTime Now(void);
/*
* Timer structure stored in a hash table to keep track of named
* timers.
*/
class nsTimelineServiceTimer {
public:
nsTimelineServiceTimer();
~nsTimelineServiceTimer();
void start();
/*
* Caller passes in "now" rather than having us calculate it so
* that we can avoid including timer overhead in the time being
* measured.
*/
void stop(PRTime now);
void reset();
PRTime getAccum();
PRTime getAccum(PRTime now);
private:
PRTime mAccum;
PRTime mStart;
PRInt32 mRunning;
PRThread *mOwnerThread; // only used for asserts - could be #if MOZ_DEBUG
};
#define TIMER_CHECK_OWNER() \
NS_ABORT_IF_FALSE(PR_GetCurrentThread() == mOwnerThread, \
"Timer used by non-owning thread")
nsTimelineServiceTimer::nsTimelineServiceTimer()
: mAccum(LL_ZERO), mStart(LL_ZERO), mRunning(0),
mOwnerThread(PR_GetCurrentThread())
{
}
nsTimelineServiceTimer::~nsTimelineServiceTimer()
{
}
void nsTimelineServiceTimer::start()
{
TIMER_CHECK_OWNER();
if (!mRunning) {
mStart = Now();
}
mRunning++;
}
void nsTimelineServiceTimer::stop(PRTime now)
{
TIMER_CHECK_OWNER();
mRunning--;
if (mRunning == 0) {
PRTime delta, accum;
LL_SUB(delta, now, mStart);
LL_ADD(accum, mAccum, delta);
mAccum = accum;
}
}
void nsTimelineServiceTimer::reset()
{
TIMER_CHECK_OWNER();
mStart = 0;
mAccum = 0;
}
PRTime nsTimelineServiceTimer::getAccum()
{
TIMER_CHECK_OWNER();
PRTime accum;
if (!mRunning) {
accum = mAccum;
} else {
PRTime delta;
LL_SUB(delta, Now(), mStart);
LL_ADD(accum, mAccum, delta);
}
return accum;
}
PRTime nsTimelineServiceTimer::getAccum(PRTime now)
{
TIMER_CHECK_OWNER();
PRTime accum;
if (!mRunning) {
accum = mAccum;
} else {
PRTime delta;
LL_SUB(delta, now, mStart);
LL_ADD(accum, mAccum, delta);
}
return accum;
}
#ifdef XP_MAC
/*
* PR_Now() on the Mac only gives us a resolution of seconds. Using
* PR_IntervalNow() gives us better resolution. with the drawback that
* the timeline is only good for about six hours.
*
* PR_IntervalNow() occasionally exhibits discontinuities on Windows,
* so we only use it on the Mac. Bleah!
*/
static PRTime Now(void)
{
PRIntervalTime numTicks = PR_IntervalNow() - initInterval;
PRTime now;
LL_ADD(now, initTime, PR_IntervalToMilliseconds(numTicks) * 1000);
return now;
}
#else
static PRTime Now(void)
{
return PR_Now();
}
#endif
static TimelineThreadData *GetThisThreadData()
{
NS_ABORT_IF_FALSE(gTLSIndex!=BAD_TLS_INDEX, "Our TLS not initialized");
TimelineThreadData *new_data = nsnull;
TimelineThreadData *data = (TimelineThreadData *)PR_GetThreadPrivate(gTLSIndex);
if (data == nsnull) {
// First request for this thread - allocate it.
new_data = new TimelineThreadData();
if (!new_data)
goto done;
// Fill it
new_data->timers = PL_NewHashTable(100, PL_HashString, PL_CompareStrings,
PL_CompareValues, NULL, NULL);
if (new_data->timers==NULL)
goto done;
new_data->initTime = PR_Now();
NS_WARN_IF_FALSE(!gTimelineDisabled,
"Why are we creating new state when disabled?");
new_data->disabled = PR_FALSE;
data = new_data;
new_data = nsnull;
PR_SetThreadPrivate(gTLSIndex, data);
}
done:
if (new_data) // eeek - error during creation!
delete new_data;
NS_WARN_IF_FALSE(data, "TimelineService could not get thread-local data");
return data;
}
extern "C" {
static void ThreadDestruct (void *data);
static PRStatus TimelineInit(void);
};
void ThreadDestruct( void *data )
{
if (data)
delete (TimelineThreadData *)data;
}
/*
* PRCallOnceFN that initializes stuff for the timing service.
*/
static PRCallOnceType initonce;
PRStatus TimelineInit(void)
{
char *timeStr;
char *fileName;
PRInt32 secs, msecs;
PRFileDesc *fd;
PRInt64 tmp1, tmp2;
PRStatus status = PR_NewThreadPrivateIndex( &gTLSIndex, ThreadDestruct );
NS_WARN_IF_FALSE(status==0, "TimelineService could not allocate TLS storage.");
timeStr = PR_GetEnv("NS_TIMELINE_INIT_TIME");
#ifdef XP_MAC
initInterval = PR_IntervalNow();
#endif
// NS_TIMELINE_INIT_TIME only makes sense for the main thread, so if it
// exists, set it there. If not, let normal thread management code take
// care of setting the init time.
if (timeStr != NULL && 2 == PR_sscanf(timeStr, "%d.%d", &secs, &msecs)) {
PRTime &initTime = GetThisThreadData()->initTime;
LL_MUL(tmp1, (PRInt64)secs, 1000000);
LL_MUL(tmp2, (PRInt64)msecs, 1000);
LL_ADD(initTime, tmp1, tmp2);
#ifdef XP_MAC
initInterval -= PR_MicrosecondsToInterval(
(PRUint32)(PR_Now() - initTime));
#endif
}
// Get the log file.
#ifdef XP_MAC
fileName = "timeline.txt";
#else
fileName = PR_GetEnv("NS_TIMELINE_LOG_FILE");
#endif
if (fileName != NULL
&& (fd = PR_Open(fileName, PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
0666)) != NULL) {
timelineFD = fd;
PR_fprintf(fd,
"NOTE: due to asynchrony, the indentation that you see does"
" not necessarily correspond to nesting in the code.\n\n");
}
// Runtime disable of timeline
if (PR_GetEnv("NS_TIMELINE_ENABLE"))
gTimelineDisabled = PR_FALSE;
return PR_SUCCESS;
}
static void ParseTime(PRTime tm, PRInt32& secs, PRInt32& msecs)
{
PRTime llsecs, llmsecs, tmp;
LL_DIV(llsecs, tm, 1000000);
LL_MOD(tmp, tm, 1000000);
LL_DIV(llmsecs, tmp, 1000);
LL_L2I(secs, llsecs);
LL_L2I(msecs, llmsecs);
}
static char *Indent(char *buf)
{
int &indent = GetThisThreadData()->indent;
int amount = indent;
if (amount > MAXINDENT) {
amount = MAXINDENT;
}
if (amount < 0) {
amount = 0;
indent = 0;
PR_Write(timelineFD, "indent underflow!\n", 18);
}
while (amount--) {
*buf++ = ' ';
}
return buf;
}
static void PrintTime(PRTime tm, const char *text, va_list args)
{
PRInt32 secs, msecs;
char pbuf[550], *pc, tbuf[550];
ParseTime(tm, secs, msecs);
// snprintf/write rather than fprintf because we don't want
// messages from multiple threads to garble one another.
pc = Indent(pbuf);
PR_vsnprintf(pc, sizeof pbuf - (pc - pbuf), text, args);
PR_snprintf(tbuf, sizeof tbuf, "%05d.%03d (%08p): %s\n",
secs, msecs, PR_GetCurrentThread(), pbuf);
PR_Write(timelineFD, tbuf, strlen(tbuf));
}
/*
* Make this public if we need it.
*/
static nsresult NS_TimelineMarkV(const char *text, va_list args)
{
PRTime elapsed,tmp;
PR_CallOnce(&initonce, TimelineInit);
TimelineThreadData *thread = GetThisThreadData();
tmp = Now();
LL_SUB(elapsed, tmp, thread->initTime);
PrintTime(elapsed, text, args);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineForceMark(const char *text, ...)
{
va_list args;
va_start(args, text);
NS_TimelineMarkV(text, args);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineMark(const char *text, ...)
{
va_list args;
va_start(args, text);
PR_CallOnce(&initonce, TimelineInit);
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
TimelineThreadData *thread = GetThisThreadData();
if (thread->disabled)
return NS_ERROR_NOT_AVAILABLE;
NS_TimelineMarkV(text, args);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineStartTimer(const char *timerName)
{
PR_CallOnce(&initonce, TimelineInit);
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
TimelineThreadData *thread = GetThisThreadData();
if (thread->timers == NULL)
return NS_ERROR_FAILURE;
if (thread->disabled)
return NS_ERROR_NOT_AVAILABLE;
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(thread->timers, timerName);
if (timer == NULL) {
timer = new nsTimelineServiceTimer;
if (!timer)
return NS_ERROR_OUT_OF_MEMORY;
PL_HashTableAdd(thread->timers, timerName, timer);
}
timer->start();
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineStopTimer(const char *timerName)
{
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
/*
* Strange-looking now/timer->stop() interaction is to avoid
* including time spent in TLS and PL_HashTableLookup in the
* timer.
*/
PRTime now = Now();
TimelineThreadData *thread = GetThisThreadData();
if (thread->timers == NULL)
return NS_ERROR_FAILURE;
if (thread->disabled)
return NS_ERROR_NOT_AVAILABLE;
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(thread->timers, timerName);
if (timer == NULL) {
return NS_ERROR_FAILURE;
}
timer->stop(now);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineMarkTimer(const char *timerName, const char *str)
{
PR_CallOnce(&initonce, TimelineInit);
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
TimelineThreadData *thread = GetThisThreadData();
if (thread->timers == NULL)
return NS_ERROR_FAILURE;
if (thread->disabled)
return NS_ERROR_NOT_AVAILABLE;
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(thread->timers, timerName);
if (timer == NULL) {
return NS_ERROR_FAILURE;
}
PRTime accum = timer->getAccum();
char buf[500];
PRInt32 sec, msec;
ParseTime(accum, sec, msec);
if (!str)
PR_snprintf(buf, sizeof buf, "%s total: %d.%03d",
timerName, sec, msec);
else
PR_snprintf(buf, sizeof buf, "%s total: %d.%03d (%s)",
timerName, sec, msec, str);
NS_TimelineMark(buf);
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineResetTimer(const char *timerName)
{
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
TimelineThreadData *thread = GetThisThreadData();
if (thread->timers == NULL)
return NS_ERROR_FAILURE;
if (thread->disabled)
return NS_ERROR_NOT_AVAILABLE;
nsTimelineServiceTimer *timer
= (nsTimelineServiceTimer *)PL_HashTableLookup(thread->timers, timerName);
if (timer == NULL) {
return NS_ERROR_FAILURE;
}
timer->reset();
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineIndent()
{
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
TimelineThreadData *thread = GetThisThreadData();
if (thread->disabled)
return NS_ERROR_NOT_AVAILABLE;
thread->indent++;
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineOutdent()
{
if (gTimelineDisabled)
return NS_ERROR_NOT_AVAILABLE;
TimelineThreadData *thread = GetThisThreadData();
if (thread->disabled)
return NS_ERROR_NOT_AVAILABLE;
thread->indent--;
return NS_OK;
}
PR_IMPLEMENT(nsresult) NS_TimelineEnter(const char *text)
{
nsresult rv = NS_TimelineMark("%s...", text);
if (NS_FAILED(rv)) {
return rv;
}
return NS_TimelineIndent();
}
PR_IMPLEMENT(nsresult) NS_TimelineLeave(const char *text)
{
nsresult rv = NS_TimelineOutdent();
if (NS_FAILED(rv)) {
return rv;
}
return NS_TimelineMark("...%s", text);
}
nsTimelineService::nsTimelineService()
{
/* member initializers and constructor code */
}
/* void mark (in string text); */
NS_IMETHODIMP nsTimelineService::Mark(const char *text)
{
return NS_TimelineMark(text);
}
/* void startTimer (in string timerName); */
NS_IMETHODIMP nsTimelineService::StartTimer(const char *timerName)
{
return NS_TimelineStartTimer(timerName);
}
/* void stopTimer (in string timerName); */
NS_IMETHODIMP nsTimelineService::StopTimer(const char *timerName)
{
return NS_TimelineStopTimer(timerName);
}
/* void markTimer (in string timerName); */
NS_IMETHODIMP nsTimelineService::MarkTimer(const char *timerName)
{
return NS_TimelineMarkTimer(timerName);
}
/* void markTimerWithComment(in string timerName, in string comment); */
NS_IMETHODIMP nsTimelineService::MarkTimerWithComment(const char *timerName, const char *comment)
{
return NS_TimelineMarkTimer(timerName, comment);
}
/* void resetTimer (in string timerName); */
NS_IMETHODIMP nsTimelineService::ResetTimer(const char *timerName)
{
return NS_TimelineResetTimer(timerName);
}
/* void indent (); */
NS_IMETHODIMP nsTimelineService::Indent()
{
return NS_TimelineIndent();
}
/* void outdent (); */
NS_IMETHODIMP nsTimelineService::Outdent()
{
return NS_TimelineOutdent();
}
/* void enter (in string text); */
NS_IMETHODIMP nsTimelineService::Enter(const char *text)
{
return NS_TimelineEnter(text);
}
/* void leave (in string text); */
NS_IMETHODIMP nsTimelineService::Leave(const char *text)
{
return NS_TimelineLeave(text);
}
#endif /* MOZ_TIMELINE */