[compiler-rt] adding fchmodat2 syscall introduced in Linux 6.6.

[devnexen]

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[llvmbot]

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

Author: David CARLIER (devnexen)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/82275.diff

1 Files Affected:

• (modified) compiler-rt/lib/sanitizer_common/sanitizer_common_syscalls.inc (+9)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_common_syscalls.inc b/compiler-rt/lib/sanitizer_common/sanitizer_common_syscalls.inc
index c10943b3e48793..fb3cef1a56e7a6 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_common_syscalls.inc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_common_syscalls.inc
@@ -2808,6 +2808,15 @@ PRE_SYSCALL(fchownat)
 POST_SYSCALL(fchownat)
 (long res, long dfd, const void *filename, long user, long group, long flag) {}
 
+PRE_SYSCALL(fchmodat2)(long dfd, const void *filename, long mode, long flag) {
+  if (filename)
+    PRE_READ(filename,
+             __sanitizer::internal_strlen((const char *)filename) + 1);
+}
+
+POST_SYSCALL(fchmodat2)(long res, long dfd, const void *filename, long mode, long flag) {}
+
+
 PRE_SYSCALL(openat)(long dfd, const void *filename, long flags, long mode) {
   if (filename)
     PRE_READ(filename,

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