[PATCH] D73136: [libFuzzer] Add INFO output when LLVMFuzzerCustomMutator is found.

[Max Moroz via Phabricator via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rG15f1d5d14425: [libFuzzer] Add INFO output when LLVMFuzzerCustomMutator is found. (authored by Dor1s).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D73136/new/

https://reviews.llvm.org/D73136

Files:
  compiler-rt/lib/fuzzer/FuzzerDriver.cpp
  compiler-rt/test/fuzzer/fuzzer-custommutator.test


Index: compiler-rt/test/fuzzer/fuzzer-custommutator.test
===================================================================
--- compiler-rt/test/fuzzer/fuzzer-custommutator.test
+++ compiler-rt/test/fuzzer/fuzzer-custommutator.test
@@ -1,11 +1,13 @@
 RUN: %cpp_compiler %S/CustomMutatorTest.cpp -o %t-CustomMutatorTest
 RUN: not %run %t-CustomMutatorTest 2>&1 | FileCheck %s --check-prefix=LLVMFuzzerCustomMutator
+LLVMFuzzerCustomMutator: INFO: found LLVMFuzzerCustomMutator
 LLVMFuzzerCustomMutator: In LLVMFuzzerCustomMutator
 LLVMFuzzerCustomMutator: {{.*}} lim: 4096 {{.*}}
 LLVMFuzzerCustomMutator: BINGO
 
 # len_control is disabled for custom mutators by default, test that it can be enabled.
 RUN: not %run %t-CustomMutatorTest -len_control=100 2>&1 | FileCheck %s --check-prefix=LLVMFuzzerCustomMutatorWithLenControl
+LLVMFuzzerCustomMutatorWithLenControl: INFO: found LLVMFuzzerCustomMutator
 LLVMFuzzerCustomMutatorWithLenControl: In LLVMFuzzerCustomMutator
 LLVMFuzzerCustomMutatorWithLenControl: {{.*}} lim: {{[1-9][0-9]?}} {{.*}}
 LLVMFuzzerCustomMutatorWithLenControl: BINGO
Index: compiler-rt/lib/fuzzer/FuzzerDriver.cpp
===================================================================
--- compiler-rt/lib/fuzzer/FuzzerDriver.cpp
+++ compiler-rt/lib/fuzzer/FuzzerDriver.cpp
@@ -195,8 +195,11 @@
   }
 
   // Disable len_control by default, if LLVMFuzzerCustomMutator is used.
-  if (EF->LLVMFuzzerCustomMutator)
+  if (EF->LLVMFuzzerCustomMutator) {
     Flags.len_control = 0;
+    Printf("INFO: found LLVMFuzzerCustomMutator (%p). "
+           "Disabling -len_control by default.\n", EF->LLVMFuzzerCustomMutator);
+  }
 
   Inputs = new Vector<std::string>;
   for (size_t A = 1; A < Args.size(); A++) {


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