[all-commits] [llvm/llvm-project] 4399f3: [TSan][Darwin] Make malloc_size interceptor more r...

[Julian Lettner via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4399f3b6b0df2aa2c57e4a3049f5494b53f6921c
      https://github.com/llvm/llvm-project/commit/4399f3b6b0df2aa2c57e4a3049f5494b53f6921c
  Author: Julian Lettner <julian.lettner at apple.com>
  Date:   2021-12-17 (Fri, 17 Dec 2021)

  Changed paths:
    M compiler-rt/lib/tsan/rtl/tsan_mman.cpp
    M compiler-rt/test/tsan/Darwin/malloc_size.mm

  Log Message:
  -----------
  [TSan][Darwin] Make malloc_size interceptor more robust

Previously we would crash in the TSan runtime if the user program passes
a pointer to `malloc_size()` that doesn't point into app memory.

In these cases, `malloc_size()` should return 0.

For ASan, we fixed a similar issue here:
https://reviews.llvm.org/D15008

Radar-Id: rdar://problem/86213149

Differential Revision: https://reviews.llvm.org/D115947