Function DoSampledAllocation

BeefTools/BeefMem/gperftools/src/tcmalloc.cc:965–990

}

static void* DoSampledAllocation(size_t size) {
  // Grab the stack trace outside the heap lock
  tcmalloc::StackTrace tmp;
  tmp.depth = GetStackTrace(tmp.stack, tcmalloc::kMaxStackDepth, 1);
  tmp.size = size;

  SpinLockHolder h(Static::pageheap_lock());
  // Allocate span
  Span *span = Static::pageheap()->New(tcmalloc::pages(size == 0 ? 1 : size));
  if (UNLIKELY(span == NULL)) {
    return NULL;
  }

  // Allocate stack trace
  tcmalloc::StackTrace *stack = Static::stacktrace_allocator()->New();
  if (UNLIKELY(stack == NULL)) {
    // Sampling failed because of lack of memory
    return span;
  }
  *stack = tmp;
  span->sample = 1;
  span->objects = stack;
  tcmalloc::DLL_Prepend(Static::sampled_objects(), span);

  return SpanToMallocResult(span);
}

namespace {