[compiler-rt][rtsan] Do not intercept [f]truncate64 for musl (#129331)

pirama-arumuga-nainar · web-flow · commit 5cf9435fd4e7 · 2025-02-28T15:08:06.000-08:00
Musl has 64-bit off_t by default and has macros that redefine
[f]truncate64 to [f]truncate.
diff --git a/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp b/compiler-rt/lib/rtsan/rtsan_interceptors_posix.cpp
@@ -295,7 +295,7 @@ INTERCEPTOR(int, ftruncate, int fd, off_t length) {
   return REAL(ftruncate)(fd, length);
 }
 
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX && !SANITIZER_MUSL
 INTERCEPTOR(int, truncate64, const char *pathname, off64_t length) {
   __rtsan_notify_intercepted_call("truncate64");
   return REAL(truncate64)(pathname, length);

Original file line number	Diff line number	Diff line change
`@@ -295,7 +295,7 @@ INTERCEPTOR(int, ftruncate, int fd, off_t length) {`
`295`	`295`	`return REAL(ftruncate)(fd, length);`
`296`	`296`	`}`
`297`	`297`
`298`		`-#if SANITIZER_LINUX`
	`298`	`+#if SANITIZER_LINUX && !SANITIZER_MUSL`
`299`	`299`	`INTERCEPTOR(int, truncate64, const char *pathname, off64_t length) {`
`300`	`300`	`__rtsan_notify_intercepted_call("truncate64");`
`301`	`301`	`return REAL(truncate64)(pathname, length);`