commit 1bc282ae5493657fea62859e0db853b6d1f668f6
author David Carlier <devnexen@gmail.com> Tue Apr 05 09:46:02 2022 +0100
committer Copybara-Service <copybara-worker@google.com> Tue Apr 05 01:50:41 2022 -0700
tree 57143ade897dea25cbe1e87864c49ef99aa4da09
parent b441b5ad4a3a2e095104f742c39aa1d15602f0e9

[Scudo] enabling anonymous named pages on Linux 5.17 and onwards.

Reviewers: vitalybuka

Reviewed-By: vitalybuka

Differential Revision: https://reviews.llvm.org/D122962

GitOrigin-RevId: 619499252307c520fd840a5f3c79ffa00eaf2264

linux.cpp

diff --git a/linux.cpp b/linux.cpp
index c77c1bb..88875c5 100644
--- a/linux.cpp
+++ b/linux.cpp
@@ -28,11 +28,11 @@
 #include <time.h>
 #include <unistd.h>
 
-#if SCUDO_ANDROID
 #include <sys/prctl.h>
-// Definitions of prctl arguments to set a vma name in Android kernels.
-#define ANDROID_PR_SET_VMA 0x53564d41
-#define ANDROID_PR_SET_VMA_ANON_NAME 0
+// Definitions of prctl arguments to set a vma name in kernels (Linux from 5.17).
+#ifndef PR_SET_VMA
+#define PR_SET_VMA 0x53564d41
+#define PR_SET_VMA_ANON_NAME 0
 #endif
 
 namespace scudo {
@@ -66,10 +66,8 @@
       dieOnMapUnmapError(errno == ENOMEM ? Size : 0);
     return nullptr;
   }
-#if SCUDO_ANDROID
   if (Name)
-    prctl(ANDROID_PR_SET_VMA, ANDROID_PR_SET_VMA_ANON_NAME, P, Size, Name);
-#endif
+    prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, P, Size, Name);
   return P;
 }