The Tor Browser: tools/trace-malloc/leakstats.c@ac0c01689b40

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  *

     3  * This Source Code Form is subject to the terms of the Mozilla Public

     4  * License, v. 2.0. If a copy of the MPL was not distributed with this

     5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include <stdio.h>

     7 #include <stdlib.h>

     8 #include <string.h>

     9 #include <errno.h>

    10 #ifdef HAVE_GETOPT_H

    11 #include <getopt.h>

    12 #else

    13 extern int  getopt(int argc, char *const *argv, const char *shortopts);

    14 extern char *optarg;

    15 extern int  optind;

    16 #ifdef XP_WIN32

    17 int optind=1;

    18 #endif

    19 #endif

    20 #include <time.h>

    21 #include "nsTraceMalloc.h"

    22 #include "tmreader.h"

    23 #include "prlog.h"

    25 static char *program;

    27 typedef struct handler_data {

    28     uint32_t current_heapsize;

    29     uint32_t max_heapsize;

    30     uint32_t bytes_allocated;

    31     uint32_t current_allocations;

    32     uint32_t total_allocations;

    33     uint32_t unmatched_frees;

    34     int finished;

    35 } handler_data;

    37 static void handler_data_init(handler_data *data)

    38 {

    39     data->current_heapsize = 0;

    40     data->max_heapsize = 0;

    41     data->bytes_allocated = 0;

    42     data->current_allocations = 0;

    43     data->total_allocations = 0;

    44     data->unmatched_frees = 0;

    45     data->finished = 0;

    46 }

    48 static void handler_data_finish(handler_data *data)

    49 {

    50 }

    52 static void my_tmevent_handler(tmreader *tmr, tmevent *event)

    53 {

    54     handler_data *data = (handler_data*) tmr->data;

    56     switch (event->type) {

    57       case TM_EVENT_REALLOC:

    58         /* On Windows, original allocation could be before we overrode malloc */

    59         if (event->u.alloc.oldserial != 0) {

    60           data->current_heapsize -= event->u.alloc.oldsize;

    61           --data->current_allocations;

    62         } else {

    63           ++data->unmatched_frees;

    64           PR_ASSERT(event->u.alloc.oldsize == 0);

    65         }

    66         /* fall-through intentional */

    67       case TM_EVENT_MALLOC:

    68       case TM_EVENT_CALLOC:

    69         ++data->current_allocations;

    70         ++data->total_allocations;

    71         data->bytes_allocated += event->u.alloc.size;

    72         data->current_heapsize += event->u.alloc.size;

    73         if (data->current_heapsize > data->max_heapsize)

    74             data->max_heapsize = data->current_heapsize;

    75         break;

    76       case TM_EVENT_FREE:

    77         /* On Windows, original allocation could be before we overrode malloc */

    78         if (event->serial != 0) {

    79           --data->current_allocations;

    80           data->current_heapsize -= event->u.alloc.size;

    81         } else {

    82           ++data->unmatched_frees;

    83           PR_ASSERT(event->u.alloc.size == 0);

    84         }

    85         break;

    86       case TM_EVENT_STATS:

    87         data->finished = 1;

    88         break;

    89     }

    90 }

    93 int main(int argc, char **argv)

    94 {

    95     int i, j, rv;

    96     tmreader *tmr;

    97     FILE *fp;

    98     time_t start;

    99     handler_data data;

   101     program = *argv;

   103     handler_data_init(&data);

   104     tmr = tmreader_new(program, &data);

   105     if (!tmr) {

   106         perror(program);

   107         exit(1);

   108     }

   110     start = time(NULL);

   111     fprintf(stdout, "%s starting at %s", program, ctime(&start));

   112     fflush(stdout);

   114     argc -= optind;

   115     argv += optind;

   116     if (argc == 0) {

   117         if (tmreader_eventloop(tmr, "-", my_tmevent_handler) <= 0)

   118             exit(1);

   119     } else {

   120         for (i = j = 0; i < argc; i++) {

   121             fp = fopen(argv[i], "r");

   122             if (!fp) {

   123                 fprintf(stderr,

   124                         "TEST-UNEXPECTED-FAIL | leakstats | can't open %s: %s\n",

   125                         argv[i], strerror(errno));

   126                 exit(1);

   127             }

   128             rv = tmreader_eventloop(tmr, argv[i], my_tmevent_handler);

   129             if (rv < 0)

   130                 exit(1);

   131             if (rv > 0)

   132                 j++;

   133             fclose(fp);

   134         }

   135         if (j == 0)

   136             exit(1);

   137     }

   139     if (!data.finished) {

   140         fprintf(stderr, "TEST-UNEXPECTED-FAIL | leakstats | log file incomplete\n");

   141         exit(1);

   142     }

   144     fprintf(stdout,

   145             "Leaks: %u bytes, %u allocations\n"

   146             "Maximum Heap Size: %u bytes\n"

   147             "%u bytes were allocated in %u allocations.\n",

   148             data.current_heapsize, data.current_allocations,

   149             data.max_heapsize,

   150             data.bytes_allocated, data.total_allocations);

   151     if (data.unmatched_frees != 0)

   152         fprintf(stdout,

   153                 "Logged %u free (or realloc) calls for which we missed the "

   154                 "original malloc.\n",

   155                 data.unmatched_frees);

   157     handler_data_finish(&data);

   158     tmreader_destroy(tmr);

   160     exit(0);

   161 }

The Tor Browser / file revision

tools/trace-malloc/leakstats.c@ac0c01689b40

tools/trace-malloc/leakstats.c