[PATCH] D55796: hwasan: Allow range of frame descriptors to be empty.

[Peter Collingbourne via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rCRT349428: hwasan: Allow range of frame descriptors to be empty. (authored by pcc, committed by ).
Herald added a subscriber: Sanitizers.

Changed prior to commit:
  https://reviews.llvm.org/D55796?vs=178560&id=178561#toc

Repository:
  rCRT Compiler Runtime

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D55796/new/

https://reviews.llvm.org/D55796

Files:
  lib/hwasan/hwasan.cc


Index: lib/hwasan/hwasan.cc
===================================================================
--- lib/hwasan/hwasan.cc
+++ lib/hwasan/hwasan.cc
@@ -229,8 +229,8 @@
 void InitFrameDescriptors(uptr b, uptr e) {
   FrameDescription *beg = reinterpret_cast<FrameDescription *>(b);
   FrameDescription *end = reinterpret_cast<FrameDescription *>(e);
-  // Must have at least one entry, which we can use for a linked list.
-  CHECK_GE(end - beg, 1U);
+  if (beg == end)
+    return;
   AllFrames.push_back({beg, end});
   if (Verbosity())
     for (FrameDescription *frame_descr = beg; frame_descr < end; frame_descr++)


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