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// -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*-
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// This is a unit test for exercising fragmentation of large (over 1
// meg) page spans. It makes sure that allocations/releases of
// increasing memory chunks do not blowup memory
// usage. See also https://github.com/gperftools/gperftools/issues/371
#include "config.h"
#include <gperftools/malloc_extension.h>
#include <gperftools/tcmalloc.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include "gtest/gtest.h"
TEST(LargeHeapFragmentationTest, Basic) {
// First grow heap by single large amount, to ensure that we do have
// a big chunk of consecutive memory. Otherwise details of
// sys-allocator behavior may trigger fragmentation regardless of
// our mitigations.
tc_free(tc_malloc(550 << 20));
MallocExtension::instance()->ReleaseFreeMemory();
for (int pass = 1; pass <= 3; pass++) {
size_t size = 100*1024*1024;
while (size < 500*1024*1024) {
void *ptr = tc_malloc(size);
free(ptr);
size += 20000;
size_t heap_size = static_cast<size_t>(-1);
ASSERT_TRUE(MallocExtension::instance()->GetNumericProperty(
"generic.heap_size",
&heap_size));
ASSERT_LT(heap_size, 1 << 30);
}
}
}