third_party/tcmalloc/chromium/src/tests/current_allocated_bytes_test.cc

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  29 // ---
  30 //
  31 // Author: Craig Silverstein
  32
  33 // This tests the accounting done by tcmalloc.  When we allocate and
  34 // free a small buffer, the number of bytes used by the application
  35 // before the alloc+free should match the number of bytes used after.
  36 // However, the internal data structures used by tcmalloc will be
  37 // quite different -- new spans will have been allocated, etc.  This
  38 // is, thus, a simple test that we account properly for the internal
  39 // data structures, so that we report the actual application-used
  40 // bytes properly.
  41
  42 #include "config_for_unittests.h"
  43 #include <stdlib.h>
  44 #include <stdio.h>
  45 #include <gperftools/malloc_extension.h>
  46 #include "base/logging.h"
  47
  48 const char kCurrent[] = "generic.current_allocated_bytes";
  49
  50 int main() {
  51   // We don't do accounting right when using debugallocation.cc, so
  52   // turn off the test then.  TODO(csilvers): get this working too.
  53 #ifdef NDEBUG
  54   size_t before_bytes, after_bytes;
  55   MallocExtension::instance()->GetNumericProperty(kCurrent, &before_bytes);
  56   free(malloc(200));
  57   MallocExtension::instance()->GetNumericProperty(kCurrent, &after_bytes);
  58
  59   CHECK_EQ(before_bytes, after_bytes);
  60 #endif
  61   printf("PASS\n");
  62   return 0;
  63 }