commit 66b7751e51c7ecabde475fe0b5d7fb7976c7c8c5
author Mitch Phillips <mitchphillips@outlook.com> Fri Sep 27 22:04:36 2019 +0000
committer Copybara-Service <copybara-worker@google.com> Thu Mar 25 23:20:24 2021 -0700
tree 2b92eef8f056eddd8c7b2fec69e044955ae25ecb
parent 99e26f82792a68da15827cf5b541d94438a2e027

[libFuzzer] Dump trace and provide correct msg for overwritten input.

Summary:
Now crashes with a stacktrace and uses 'overwrites-const-input' as the error
message instead of 'out-of-memory'.

Reviewers: morehouse, Dor1s

Reviewed By: morehouse, Dor1s

Subscribers: #sanitizers, llvm-commits, metzman, Dor1s

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D68067

llvm-svn: 373130
GitOrigin-RevId: d1e222e552d9f3d83083220e186c1f4c925e3e9c

FuzzerLoop.cpp

diff --git a/FuzzerLoop.cpp b/FuzzerLoop.cpp
index 7150a11..96ab544 100644
--- a/FuzzerLoop.cpp
+++ b/FuzzerLoop.cpp
@@ -515,8 +515,10 @@
 void Fuzzer::CrashOnOverwrittenData() {
   Printf("==%d== ERROR: libFuzzer: fuzz target overwrites its const input\n",
          GetPid());
+  PrintStackTrace();
+  Printf("SUMMARY: libFuzzer: overwrites-const-input\n");
   DumpCurrentUnit("crash-");
-  Printf("SUMMARY: libFuzzer: out-of-memory\n");
+  PrintFinalStats();
   _Exit(Options.ErrorExitCode); // Stop right now.
 }