[compiler-rt] don't use mallopt on musl (PR #101055)
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Mon Jul 29 11:22:23 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-compiler-rt-sanitizer
Author: Daniel Martinez (Calandracas606)
<details>
<summary>Changes</summary>
Fixes a build failure on 19.1.0-rc1 when building on linux with musl as the libc
musl does not provide mallopt, whereas glibc does
---
Full diff: https://github.com/llvm/llvm-project/pull/101055.diff
1 Files Affected:
- (modified) compiler-rt/lib/nsan/nsan_interceptors.cpp (+2-2)
``````````diff
diff --git a/compiler-rt/lib/nsan/nsan_interceptors.cpp b/compiler-rt/lib/nsan/nsan_interceptors.cpp
index 544b44f53cc42..baa8185994113 100644
--- a/compiler-rt/lib/nsan/nsan_interceptors.cpp
+++ b/compiler-rt/lib/nsan/nsan_interceptors.cpp
@@ -21,7 +21,7 @@
#include <wchar.h>
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && defined(__GLIBC__)
extern "C" int mallopt(int param, int value);
#endif
@@ -210,7 +210,7 @@ void __nsan::InitializeInterceptors() {
CHECK(!initialized);
// Instruct libc malloc to consume less memory.
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && defined(__GLIBC__)
mallopt(1, 0); // M_MXFAST
mallopt(-3, 32 * 1024); // M_MMAP_THRESHOLD
#endif
``````````
</details>
https://github.com/llvm/llvm-project/pull/101055
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