The Tor Browser: xpcom/tests/TestJemalloc.cpp@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     1 /* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */

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

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

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

     6 /*

     7  * Ideally, this test would be in memory/test/.  But I couldn't get it to build

     8  * there (couldn't find TestHarness.h).  I think memory/ is processed too early

     9  * in the build.  So it's here.

    10  */

    12 #include "TestHarness.h"

    13 #include "mozmemory.h"

    15 static inline bool

    16 TestOne(size_t size)

    17 {

    18     size_t req = size;

    19     size_t adv = malloc_good_size(req);

    20     char* p = (char*)malloc(req);

    21     size_t usable = moz_malloc_usable_size(p);

    22     if (adv != usable) {

    23       fail("malloc_good_size(%d) --> %d; "

    24            "malloc_usable_size(%d) --> %d",

    25            req, adv, req, usable);

    26       return false;

    27     }

    28     free(p);

    29     return true;

    30 }

    32 static inline bool

    33 TestThree(size_t size)

    34 {

    35     return TestOne(size - 1) && TestOne(size) && TestOne(size + 1);

    36 }

    38 static nsresult

    39 TestJemallocUsableSizeInAdvance()

    40 {

    41   #define K   * 1024

    42   #define M   * 1024 * 1024

    44   /*

    45    * Test every size up to a certain point, then (N-1, N, N+1) triplets for a

    46    * various sizes beyond that.

    47    */

    49   for (size_t n = 0; n < 16 K; n++)

    50     if (!TestOne(n))

    51       return NS_ERROR_UNEXPECTED;

    53   for (size_t n = 16 K; n < 1 M; n += 4 K)

    54     if (!TestThree(n))

    55       return NS_ERROR_UNEXPECTED;

    57   for (size_t n = 1 M; n < 8 M; n += 128 K)

    58     if (!TestThree(n))

    59       return NS_ERROR_UNEXPECTED;

    61   passed("malloc_good_size");

    63   return NS_OK;

    64 }

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

    67 {

    68   int rv = 0;

    69   ScopedXPCOM xpcom("jemalloc");

    70   if (xpcom.failed())

    71       return 1;

    73   if (NS_FAILED(TestJemallocUsableSizeInAdvance()))

    74     rv = 1;

    76   return rv;

    77 }

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