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gecko-dev
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gecko-dev/tools/jprof/leaky.cpp

541 строка
13 KiB
C++
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// 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 Initial Developer of the Original Code is Kipp E.B. Hickman.
#include "leaky.h"
#include "intcnt.h"
#include <sys/types.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#ifndef NTO
#include <getopt.h>
#endif
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#ifdef NTO
#include <mem.h>
#endif
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
static const u_int DefaultBuckets = 10007; // arbitrary, but prime
static const u_int MaxBuckets = 1000003; // arbitrary, but prime
//----------------------------------------------------------------------
int main(int argc, char** argv)
{
leaky* l = new leaky;
l->initialize(argc, argv);
l->open();
return 0;
}
leaky::leaky()
{
applicationName = NULL;
logFile = NULL;
progFile = NULL;
quiet = TRUE;
showAddress = FALSE;
stackDepth = 100000;
mappedLogFile = -1;
firstLogEntry = lastLogEntry = 0;
sfd = -1;
externalSymbols = 0;
usefulSymbols = 0;
numExternalSymbols = 0;
lowestSymbolAddr = 0;
highestSymbolAddr = 0;
loadMap = NULL;
}
leaky::~leaky()
{
}
void leaky::usageError()
{
fprintf(stderr, "Usage: %s prog log\n", (char*) applicationName);
exit(-1);
}
void leaky::initialize(int argc, char** argv)
{
applicationName = argv[0];
applicationName = strrchr(applicationName, '/');
if (!applicationName) {
applicationName = argv[0];
} else {
applicationName++;
}
int arg;
int errflg = 0;
while ((arg = getopt(argc, argv, "adEe:gh:i:r:Rs:tqx")) != -1) {
switch (arg) {
case '?':
errflg++;
break;
case 'a':
break;
case 'A':
showAddress = TRUE;
break;
case 'd':
break;
case 'R':
break;
case 'e':
exclusions.add(optarg);
break;
case 'g':
break;
case 'r':
roots.add(optarg);
if (!includes.IsEmpty()) {
errflg++;
}
break;
case 'i':
includes.add(optarg);
if (!roots.IsEmpty()) {
errflg++;
}
break;
case 'h':
break;
case 's':
stackDepth = atoi(optarg);
if (stackDepth < 2) {
stackDepth = 2;
}
break;
case 'x':
break;
case 'q':
quiet = TRUE;
break;
}
}
if (errflg || ((argc - optind) < 2)) {
usageError();
}
progFile = argv[optind++];
logFile = argv[optind];
}
static void* mapFile(int fd, u_int flags, off_t* sz)
{
struct stat sb;
if (fstat(fd, &sb) < 0) {
perror("fstat");
exit(-1);
}
void* base = mmap(0, (int)sb.st_size, flags, MAP_PRIVATE, fd, 0);
if (!base) {
perror("mmap");
exit(-1);
}
*sz = sb.st_size;
return base;
}
void leaky::LoadMap()
{
malloc_map_entry mme;
char name[1000];
int fd = ::open(M_MAPFILE, O_RDONLY);
if (fd < 0) {
perror("open: " M_MAPFILE);
exit(-1);
}
for (;;) {
int nb = read(fd, &mme, sizeof(mme));
if (nb != sizeof(mme)) break;
nb = read(fd, name, mme.nameLen);
if (nb != (int)mme.nameLen) break;
name[mme.nameLen] = 0;
if (!quiet) {
printf("%s @ %lx\n", name, mme.address);
}
LoadMapEntry* lme = new LoadMapEntry;
lme->address = mme.address;
lme->name = strdup(name);
lme->next = loadMap;
loadMap = lme;
}
close(fd);
}
void leaky::open()
{
LoadMap();
setupSymbols(progFile);
// open up the log file
mappedLogFile = ::open(logFile, O_RDONLY);
if (mappedLogFile < 0) {
perror("open");
exit(-1);
}
off_t size;
firstLogEntry = (malloc_log_entry*) mapFile(mappedLogFile, PROT_READ, &size);
lastLogEntry = (malloc_log_entry*)((char*)firstLogEntry + size);
analyze();
exit(0);
}
//----------------------------------------------------------------------
static ptrdiff_t symbolOrder(void const* a, void const* b)
{
Symbol const* ap = (Symbol const *)a;
Symbol const* bp = (Symbol const *)b;
return ap->address - bp->address;
}
void leaky::ReadSharedLibrarySymbols()
{
LoadMapEntry* lme = loadMap;
while (NULL != lme) {
ReadSymbols(lme->name, lme->address);
lme = lme->next;
}
}
void leaky::setupSymbols(const char *fileName)
{
// Read in symbols from the program
ReadSymbols(fileName, 0);
// Read in symbols from the .so's
ReadSharedLibrarySymbols();
if (!quiet) {
printf("A total of %d symbols were loaded\n", usefulSymbols);
}
// Now sort them
qsort(externalSymbols, usefulSymbols, sizeof(Symbol), symbolOrder);
lowestSymbolAddr = externalSymbols[0].address;
highestSymbolAddr = externalSymbols[usefulSymbols-1].address;
}
// Binary search the table, looking for a symbol that covers this
// address.
int leaky::findSymbolIndex(u_long addr)
{
u_int base = 0;
u_int limit = usefulSymbols - 1;
Symbol* end = &externalSymbols[limit];
while (base <= limit) {
u_int midPoint = (base + limit)>>1;
Symbol* sp = &externalSymbols[midPoint];
if (addr < sp->address) {
if (midPoint == 0) {
return -1;
}
limit = midPoint - 1;
} else {
if (sp+1 < end) {
if (addr < (sp+1)->address) {
return midPoint;
}
} else {
return midPoint;
}
base = midPoint + 1;
}
}
return -1;
}
Symbol* leaky::findSymbol(u_long addr)
{
int idx = findSymbolIndex(addr);
if(idx<0) {
return NULL;
} else {
return &externalSymbols[idx];
}
}
//----------------------------------------------------------------------
bool leaky::excluded(malloc_log_entry* lep)
{
if (exclusions.IsEmpty()) {
return false;
}
char** pcp = &lep->pcs[0];
u_int n = lep->numpcs;
for (u_int i = 0; i < n; i++, pcp++) {
Symbol* sp = findSymbol((u_long) *pcp);
if (sp && exclusions.contains(sp->name)) {
return true;
}
}
return false;
}
bool leaky::included(malloc_log_entry* lep)
{
if (includes.IsEmpty()) {
return true;
}
char** pcp = &lep->pcs[0];
u_int n = lep->numpcs;
for (u_int i = 0; i < n; i++, pcp++) {
Symbol* sp = findSymbol((u_long) *pcp);
if (sp && includes.contains(sp->name)) {
return true;
}
}
return false;
}
//----------------------------------------------------------------------
void leaky::displayStackTrace(FILE* out, malloc_log_entry* lep)
{
char** pcp = &lep->pcs[0];
u_int n = (lep->numpcs < stackDepth) ? lep->numpcs : stackDepth;
for (u_int i = 0; i < n; i++, pcp++) {
u_long addr = (u_long) *pcp;
Symbol* sp = findSymbol(addr);
if (sp) {
fputs(sp->name, out);
if (showAddress) {
fprintf(out, "[%p]", (char*)addr);
}
}
else {
fprintf(out, "<%p>", (char*)addr);
}
fputc(' ', out);
}
fputc('\n', out);
}
void leaky::dumpEntryToLog(malloc_log_entry* lep)
{
printf("%ld\t", lep->delTime);
printf(" --> ");
displayStackTrace(stdout, lep);
}
void leaky::generateReportHTML(FILE *fp, int *countArray, int count)
{
fprintf(fp,"<html><head><title>Jprof Profile Report</title></head><body>\n");
fprintf(fp,"<h1><center>Jprof Profile Report</center></h1>\n");
fprintf(fp,"<center>");
fprintf(fp,"<A href=#flat>flat</A><b> | </b><A href=#hier>hierarchical</A>");
fprintf(fp,"</center><P><P><P>\n");
int *rankingTable = new int[usefulSymbols];
for(int cnt=usefulSymbols; --cnt>=0; rankingTable[cnt]=cnt);
// Drat. I would use ::qsort() but I would need a global variable and my
// into-pascal professor threatened to flunk anyone who used globals.
// She dammaged me for life :-) (That was 1986. See how much influence
// she had. I dont remember her name but I always feel guilty about globals)
// Shell Sort. 581130733 is the max 31 bit value of h = 3h+1
int mx, i, h;
for(mx=usefulSymbols/9, h=581130733; h>0; h/=3) {
if(h<mx) {
for(i = h-1; i<usefulSymbols; i++) {
int j, tmp=rankingTable[i], val = countArray[tmp];
for(j = i; (j>=h) && (countArray[rankingTable[j-h]]<val); j-=h) {
rankingTable[j] = rankingTable[j-h];
}
rankingTable[j] = tmp;
}
}
}
// Ok, We are sorted now. Lets go through the table until we get to
// functions that were never called. Right now we dont do much inside
// this loop. Later we can get callers and callees into it like gprof
// does
fprintf(fp,
"<h2><A NAME=hier></A><center><a href=\"http://lxr.mozilla.org/mozilla/source/tools/jprof/README.html#hier\">Hierarchical Profile</a></center></h2><hr>\n");
fprintf(fp, "<pre>\n");
fprintf(fp, "%5s %5s %4s %s\n",
"index", "Count", "Hits", "Function Name");
for(i=0; i<usefulSymbols && countArray[rankingTable[i]]>0; i++) {
Symbol *sp=&externalSymbols[rankingTable[i]];
sp->cntP.printReport(fp, this);
fprintf(fp, "%6d %3d %8d <A name=%d>%s</a>\n", rankingTable[i],
sp->timerHit, countArray[rankingTable[i]], rankingTable[i],sp->name);
sp->cntC.printReport(fp, this);
fprintf(fp, "<hr>\n");
}
fprintf(fp,"</pre>\n");
// OK, Now we want to print the flat profile. To do this we resort on
// the hit count.
// Cut-N-Paste Shell sort from above. The Ranking Table has already been
// populated, so we do not have to reinitialize it.
for(mx=usefulSymbols/9, h=581130733; h>0; h/=3) {
if(h<mx) {
for(i = h-1; i<usefulSymbols; i++) {
int j, tmp=rankingTable[i], val = externalSymbols[tmp].timerHit;
for(j = i;
(j>=h) && (externalSymbols[rankingTable[j-h]].timerHit<val); j-=h) {
rankingTable[j] = rankingTable[j-h];
}
rankingTable[j] = tmp;
}
}
}
// Pre-count up total counter hits, to get a percentage.
// I wanted the total before walking the list, if this
// double-pass over externalSymbols gets slow we can
// do single-pass and print this out after the loop finishes.
int totalTimerHits = 0;
for(i=0;
i<usefulSymbols && externalSymbols[rankingTable[i]].timerHit>0; i++) {
Symbol *sp=&externalSymbols[rankingTable[i]];
totalTimerHits += sp->timerHit;
}
fprintf(fp,"<h2><A NAME=flat></A><center><a href=\"http://lxr.mozilla.org/mozilla/source/tools/jprof/README.html#flat\">Flat Profile</a></center></h2><br>\n");
fprintf(fp, "<pre>\n");
fprintf(fp, "Total hit count: %d\n", totalTimerHits);
fprintf(fp, "Count %%Total Function Name\n");
// Now loop for as long as we have timer hits
for(i=0;
i<usefulSymbols && externalSymbols[rankingTable[i]].timerHit>0; i++) {
Symbol *sp=&externalSymbols[rankingTable[i]];
fprintf(fp, "%3d %-2.1f <A href=\"#%d\">%s</a>\n",
sp->timerHit, ((float)sp->timerHit/(float)totalTimerHits)*100.0, rankingTable[i], sp->name);
}
fprintf(fp,"</pre></body></html>\n");
}
void leaky::analyze()
{
int *countArray = new int[usefulSymbols];
int *flagArray = new int[usefulSymbols];
//Zero our function call counter
memset(countArray, 0, sizeof(countArray[0])*usefulSymbols);
// The flag array is used to prevent counting symbols multiple times
// if functions are called recursively. In order to keep from having
// to zero it on each pass through the loop, we mark it with the value
// of stacks on each trip through the loop. This means we can determine
// if we have seen this symbol for this stack trace w/o having to reset
// from the prior stacktrace.
memset(flagArray, -1, sizeof(flagArray[0])*usefulSymbols);
// This loop walks through all the call stacks we recorded
stacks = 0;
for(malloc_log_entry* lep=firstLogEntry;
lep < lastLogEntry;
lep = reinterpret_cast<malloc_log_entry*>(&lep->pcs[lep->numpcs])) {
if (excluded(lep) || !included(lep))
continue;
++stacks; // How many stack frames did we collect
// This loop walks through every symbol in the call stack. By walking it
// backwards we know who called the function when we get there.
u_int n = (lep->numpcs < stackDepth) ? lep->numpcs : stackDepth;
char** pcp = &lep->pcs[n-1];
int idx=-1, parrentIdx=-1; // Init idx incase n==0
for(int i=n-1; i>=0; --i, --pcp, parrentIdx=idx) {
idx = findSymbolIndex(reinterpret_cast<u_long>(*pcp));
if(idx>=0) {
// If we have not seen this symbol before count it and mark it as seen
if(flagArray[idx]!=stacks && ((flagArray[idx]=stacks) || true)) {
++countArray[idx];
}
// We know who we are and we know who our parrent is. Count this
if(parrentIdx>=0) {
externalSymbols[parrentIdx].regChild(idx);
externalSymbols[idx].regParrent(parrentIdx);
}
}
}
// idx should be the function that we were in when we recieved the signal.
if(idx>=0) {
++externalSymbols[idx].timerHit;
}
}
generateReportHTML(stdout, countArray, stacks);
}
void FunctionCount::printReport(FILE *fp, leaky *lk)
{
const char *fmt = " %6d <A href=\"#%d\">%s</A>\n";
int nmax, tmax=((~0U)>>1);
do {
nmax=0;
for(int j=getSize(); --j>=0;) {
int cnt = getCount(j);
if(cnt==tmax) {
int idx = getIndex(j);
fprintf(fp, fmt, getCount(j), idx,
const_cast<char*>(lk->indexToName(idx)));
} else if(cnt<tmax && cnt>nmax) {
nmax=cnt;
}
}
} while((tmax=nmax)>0);
}
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