[compiler-rt] madvise interception

[devnexen]

No description provided.

[llvmbot]

@llvm/pr-subscribers-compiler-rt-sanitizer

Author: David CARLIER (devnexen)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/76562.diff

1 Files Affected:

• (modified) compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc (+10-1)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
index ba46707516971f..bfd72c5897e45e 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -7498,10 +7498,19 @@ INTERCEPTOR(int, mprotect, void *addr, SIZE_T sz, int prot) {
   MprotectMallocZones(addr, prot);
   return REAL(mprotect)(addr, sz, prot);
 }
+
+INTERCEPTOR(int, madvise, uptr addr, SIZE_T sz, int advice) {
+  void *ctx;
+  if (COMMON_INTERCEPTOR_NOTHING_IS_INITIALIZED)
+    return (int)internal_madvise(addr, sz, advice);
+  COMMON_INTERCEPTOR_ENTER(ctx, madvise, addr, sz, advice);
+  return REAL(madvise)(addr, sz, advice);
+}
 #define INIT_MMAP                                                              \
   COMMON_INTERCEPT_FUNCTION(mmap);                                             \
   COMMON_INTERCEPT_FUNCTION(munmap);                                           \
-  COMMON_INTERCEPT_FUNCTION(mprotect);
+  COMMON_INTERCEPT_FUNCTION(mprotect);                                         \
+  COMMON_INTERCEPT_FUNCTION(madvise);
 #else
 #define INIT_MMAP
 #endif

[github-actions]

✅ With the latest revision this PR passed the C/C++ code formatter.

[vitalybuka]

why do we need it if it does nothing?

[devnexen]

true..