[compiler-rt] [test] Make two sanitize-coverage tests pass with glibc 2.39+ (PR #84231)

[Fangrui Song via llvm-commits]

https://github.com/MaskRay created https://github.com/llvm/llvm-project/pull/84231

glibc 2.39[1] added `nonnull` attribute to a few libio functions including
fprintf. The -fsanitize=undefined mode checks the argument to fprintf
and has extra counters, not expected by two tests. Specify
-fno-sanitize=nonnull-attribute to make the two tests pass.

[1]: https://sourceware.org/git/?p=glibc.git;a=commit;h=64b1a44183a3094672ed304532bedb9acc707554


>From 0d8cf65fd521acc6832dd69b5e5be029c7c684b1 Mon Sep 17 00:00:00 2001
From: Fangrui Song <i at maskray.me>
Date: Wed, 6 Mar 2024 12:51:07 -0800
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Created using spr 1.3.5-bogner
---
 .../sanitizer_coverage_inline8bit_counter_default_impl.cpp    | 4 +++-
 .../TestCases/sanitizer_coverage_symbolize.cpp                | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp
index 1ac04b53491e14..1d1fbf7299e8b4 100644
--- a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_inline8bit_counter_default_impl.cpp
@@ -3,7 +3,9 @@
 
 // REQUIRES: has_sancovcc,stable-runtime,linux,x86_64-target-arch
 
-// RUN: %clangxx -O0 %s -fsanitize-coverage=inline-8bit-counters,pc-table -o %t
+/// In glibc 2.39+, fprintf has a nonnull attribute. Disable nonnull-attribute,
+/// which would increase counters for ubsan.
+// RUN: %clangxx -O0 %s -fsanitize-coverage=inline-8bit-counters,pc-table -fno-sanitize=nonnull-attribute -o %t
 // RUN: rm -f %t-counters %t-pcs
 // RUN: env %tool_options="cov_8bit_counters_out=%t-counters cov_pcs_out=%t-pcs verbosity=1" %run %t 2>&1 | FileCheck %s
 
diff --git a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp
index daa994c8116251..b168954a1c92cf 100644
--- a/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp
+++ b/compiler-rt/test/sanitizer_common/TestCases/sanitizer_coverage_symbolize.cpp
@@ -7,7 +7,9 @@
 // RUN: rm -rf $DIR
 // RUN: mkdir -p $DIR
 // RUN: cd $DIR
-// RUN: %clangxx -O0 -fsanitize-coverage=trace-pc-guard %s -o %t
+/// In glibc 2.39+, fprintf has a nonnull attribute. Disable nonnull-attribute,
+/// which would increase counters for ubsan.
+// RUN: %clangxx -O0 -fsanitize-coverage=trace-pc-guard -fno-sanitize=nonnull-attribute %s -o %t
 // RUN: %env_tool_opts=coverage=1 %t 2>&1 | FileCheck %s
 // RUN: rm -rf $DIR