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// Copyright 2009 Google Inc. All Rights Reserved.
// Author: fikes@google.com (Andrew Fikes)
#include <stdio.h>
#include "config_for_unittests.h"
#include "base/logging.h"
#include "common.h"
#include "page_heap.h"
namespace {
static void CheckStats(const tcmalloc::PageHeap* ph,
uint64_t system_pages,
uint64_t free_pages,
uint64_t unmapped_pages) {
tcmalloc::PageHeap::Stats stats = ph->stats();
EXPECT_EQ(system_pages, stats.system_bytes >> kPageShift);
EXPECT_EQ(free_pages, stats.free_bytes >> kPageShift);
EXPECT_EQ(unmapped_pages, stats.unmapped_bytes >> kPageShift);
}
static void TestPageHeap_Stats() {
tcmalloc::PageHeap* ph = new tcmalloc::PageHeap();
// Empty page heap
CheckStats(ph, 0, 0, 0);
// Allocate a span 's1'
tcmalloc::Span* s1 = ph->New(256);
CheckStats(ph, 256, 0, 0);
// Split span 's1' into 's1', 's2'. Delete 's2'
tcmalloc::Span* s2 = ph->Split(s1, 128);
Length s2_len = s2->length;
ph->Delete(s2);
CheckStats(ph, 256, 128, 0);
// Unmap deleted span 's2'
EXPECT_EQ(s2_len, ph->ReleaseAtLeastNPages(1));
CheckStats(ph, 256, 0, 128);
// Delete span 's1'
ph->Delete(s1);
CheckStats(ph, 256, 128, 128);
delete ph;
}
} // namespace
int main(int argc, char **argv) {
TestPageHeap_Stats();
printf("PASS\n");
return 0;
}
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