5c7fc76983
Summary: Augment SanitizerCoverage to insert maximum stack depth tracing for use by libFuzzer. The new instrumentation is enabled by the flag -fsanitize-coverage=stack-depth and is compatible with the existing trace-pc-guard coverage. The user must also declare the following global variable in their code: thread_local uintptr_t __sancov_lowest_stack https://bugs.llvm.org/show_bug.cgi?id=33857 Reviewers: vitalybuka, kcc Reviewed By: vitalybuka Subscribers: kubamracek, hiraditya, cfe-commits, llvm-commits Differential Revision: https://reviews.llvm.org/D36839 llvm-svn: 311186
33 lines
802 B
C++
33 lines
802 B
C++
// Tests -fsanitize-coverage=stack-depth
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//
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// XFAIL: tsan
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//
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// RUN: %clangxx -O0 -std=c++11 -fsanitize-coverage=stack-depth %s -o %t
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// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not Assertion{{.*}}failed
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// RUN: %clangxx -O0 -std=c++11 -fsanitize-coverage=trace-pc-guard,stack-depth \
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// RUN: %s -o %t
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// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not Assertion{{.*}}failed
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#include <cstdint>
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#include <cstdio>
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#include <cassert>
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thread_local uintptr_t __sancov_lowest_stack;
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uintptr_t last_stack;
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void foo(int recurse) {
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assert(__sancov_lowest_stack < last_stack);
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last_stack = __sancov_lowest_stack;
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if (recurse <= 0) return;
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foo(recurse - 1);
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}
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int main() {
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last_stack = __sancov_lowest_stack;
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foo(100);
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printf("Success!\n");
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return 0;
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}
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// CHECK: Success!
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