b52b2e1c18
Summary: This patch disables implicit builtin knowledge about memcmp-like functions when compiling the program for fuzzing, i.e., when -fsanitize=fuzzer(-no-link) is given. This allows libFuzzer to always intercept memcmp-like functions as it effectively disables optimizing calls to such functions into different forms. This is done by adding a set of flags (-fno-builtin-memcmp and others) in the clang driver. Individual -fno-builtin-* flags previously used in several libFuzzer tests are now removed, as it is now done automatically in the clang driver. The patch was once reverted in8ef9e2bf35, as this patch was dependent on a reverted commitf78d9fceea. This reverted commit was recommitted in831ae45e3d, so relanding this dependent patch too. Reviewers: morehouse, hctim Subscribers: cfe-commits, #sanitizers Tags: #clang, #sanitizers Differential Revision: https://reviews.llvm.org/D83987
10 lines
455 B
Plaintext
10 lines
455 B
Plaintext
UNSUPPORTED: darwin, freebsd, windows
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RUN: %cpp_compiler -fno-sanitize=address %S/StrncmpTest.cpp -o %t-NoAsanStrncmpTest
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RUN: not %run %t-NoAsanStrncmpTest -seed=2 -runs=10000000 2>&1 | FileCheck %s
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RUN: %cpp_compiler -fno-sanitize=address -fno-builtin-calloc %S/CustomAllocator.cpp %S/StrncmpTest.cpp -o %t-NoAsanCustomAllocatorStrncmpTest
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RUN: not %run %t-NoAsanCustomAllocatorStrncmpTest -seed=2 -runs=10000000 2>&1 | FileCheck %s
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CHECK: BINGO
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