r311801 - [SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer

[Matt Morehouse via cfe-commits]

Author: morehouse
Date: Fri Aug 25 14:18:29 2017
New Revision: 311801

URL: http://llvm.org/viewvc/llvm-project?rev=311801&view=rev
Log:
[SanitizeCoverage] Enable stack-depth coverage for -fsanitize=fuzzer

Summary:
- Don't sanitize __sancov_lowest_stack.
- Don't instrument leaf functions.
- Add CoverageStackDepth to Fuzzer and FuzzerNoLink.

Reviewers: vitalybuka, kcc

Reviewed By: kcc

Subscribers: cfe-commits, llvm-commits, hiraditya

Differential Revision: https://reviews.llvm.org/D37156

Modified:
    cfe/trunk/lib/Driver/SanitizerArgs.cpp

Modified: cfe/trunk/lib/Driver/SanitizerArgs.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/SanitizerArgs.cpp?rev=311801&r1=311800&r2=311801&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/SanitizerArgs.cpp (original)
+++ cfe/trunk/lib/Driver/SanitizerArgs.cpp Fri Aug 25 14:18:29 2017
@@ -290,10 +290,11 @@ SanitizerArgs::SanitizerArgs(const ToolC
       if (Add & Fuzzer)
         Add |= FuzzerNoLink;
 
-      // Enable coverage if the fuzzing flag is set.
+      // Enable coverage and stack depth tracking if the fuzzing flag is set.
       if (Add & FuzzerNoLink)
         CoverageFeatures |= CoverageTracePCGuard | CoverageIndirCall |
-                            CoverageTraceCmp | CoveragePCTable;
+                            CoverageTraceCmp | CoveragePCTable |
+                            CoverageStackDepth;
 
       Kinds |= Add;
     } else if (Arg->getOption().matches(options::OPT_fno_sanitize_EQ)) {