third_party/tcmalloc/vendor/src/tests/malloc_extension_test.cc

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// ---
// Author: Craig Silverstein
//
// Simple test of malloc_extension.  Includes test of C shims.

#include "config_for_unittests.h"
#include <stdio.h>
#include <sys/types.h>
#include "base/logging.h"
#include <gperftools/malloc_extension.h>
#include <gperftools/malloc_extension_c.h>

using STL_NAMESPACE::vector;

int main(int argc, char** argv) {
  void* a = malloc(1000);

  size_t cxx_bytes_used, c_bytes_used;
  ASSERT_TRUE(MallocExtension::instance()->GetNumericProperty(
      "generic.current_allocated_bytes", &cxx_bytes_used));
  ASSERT_TRUE(MallocExtension_GetNumericProperty(
      "generic.current_allocated_bytes", &c_bytes_used));
  ASSERT_GT(cxx_bytes_used, 1000);
  ASSERT_EQ(cxx_bytes_used, c_bytes_used);

  ASSERT_TRUE(MallocExtension::instance()->VerifyAllMemory());
  ASSERT_TRUE(MallocExtension_VerifyAllMemory());

  ASSERT_EQ(MallocExtension::kOwned,
            MallocExtension::instance()->GetOwnership(a));
  // TODO(csilvers): this relies on undocumented behavior that
  // GetOwnership works on stack-allocated variables.  Use a better test.
  ASSERT_EQ(MallocExtension::kNotOwned,
            MallocExtension::instance()->GetOwnership(&cxx_bytes_used));
  ASSERT_EQ(MallocExtension::kNotOwned,
            MallocExtension::instance()->GetOwnership(NULL));
  ASSERT_GE(MallocExtension::instance()->GetAllocatedSize(a), 1000);
  // This is just a sanity check.  If we allocated too much, tcmalloc is broken
  ASSERT_LE(MallocExtension::instance()->GetAllocatedSize(a), 5000);
  ASSERT_GE(MallocExtension::instance()->GetEstimatedAllocatedSize(1000), 1000);

  for (int i = 0; i < 10; ++i) {
    void *p = malloc(i);
    ASSERT_GE(MallocExtension::instance()->GetAllocatedSize(p),
             MallocExtension::instance()->GetEstimatedAllocatedSize(i));
    free(p);
  }

  // Check the c-shim version too.
  ASSERT_EQ(MallocExtension_kOwned, MallocExtension_GetOwnership(a));
  ASSERT_EQ(MallocExtension_kNotOwned,
            MallocExtension_GetOwnership(&cxx_bytes_used));
  ASSERT_EQ(MallocExtension_kNotOwned, MallocExtension_GetOwnership(NULL));
  ASSERT_GE(MallocExtension_GetAllocatedSize(a), 1000);
  ASSERT_LE(MallocExtension_GetAllocatedSize(a), 5000);
  ASSERT_GE(MallocExtension_GetEstimatedAllocatedSize(1000), 1000);

  free(a);

  // Verify that the .cc file and .h file have the same enum values.
  ASSERT_EQ(static_cast<int>(MallocExtension::kUnknownOwnership),
            static_cast<int>(MallocExtension_kUnknownOwnership));
  ASSERT_EQ(static_cast<int>(MallocExtension::kOwned),
            static_cast<int>(MallocExtension_kOwned));
  ASSERT_EQ(static_cast<int>(MallocExtension::kNotOwned),
            static_cast<int>(MallocExtension_kNotOwned));

  printf("DONE\n");
  return 0;
}