[PATCH] D17129: [Compiler-rt][MSan] fix param_tls_limit test

[Mohit Bhakkad via llvm-commits]

This revision was automatically updated to reflect the committed changes.
Closed by commit rL262302: [Compiler-rt][MSan] fix param_tls_limit test for platforms where big… (authored by mohit.bhakkad).

Changed prior to commit:
  http://reviews.llvm.org/D17129?vs=49350&id=49451#toc

Repository:
  rL LLVM

http://reviews.llvm.org/D17129

Files:
  compiler-rt/trunk/test/msan/param_tls_limit.cc

Index: compiler-rt/trunk/test/msan/param_tls_limit.cc
===================================================================
--- compiler-rt/trunk/test/msan/param_tls_limit.cc
+++ compiler-rt/trunk/test/msan/param_tls_limit.cc
@@ -20,6 +20,17 @@
 // In case of no overflow, it is still poisoned.
 #define NO_OVERFLOW(x) assert(__msan_test_shadow(&x, sizeof(x)) == 0)
 
+#if defined(__x86_64__)
+// In x86_64, if argument is partially outside tls, it is considered completly
+// unpoisoned
+#define PARTIAL_OVERFLOW(x) OVERFLOW(x)
+#else
+// In other archs, bigger arguments are splitted in multiple IR arguments, so
+// they are considered poisoned till tls limit. Checking last byte of such arg:
+#define PARTIAL_OVERFLOW(x) assert(__msan_test_shadow((char *)(&(x) + 1) - 1, 1) == -1)
+#endif
+
+
 template<int N>
 struct S {
   char x[N];
@@ -34,17 +45,17 @@
 }
 
 void f801(S<801> s) {
-  OVERFLOW(s);
+  PARTIAL_OVERFLOW(s);
 }
 
 void f1000(S<1000> s) {
-  OVERFLOW(s);
+  PARTIAL_OVERFLOW(s);
 }
 
 void f_many(int a, double b, S<800> s, int c, double d) {
   NO_OVERFLOW(a);
   NO_OVERFLOW(b);
-  OVERFLOW(s);
+  PARTIAL_OVERFLOW(s);
   OVERFLOW(c);
   OVERFLOW(d);
 }
@@ -54,7 +65,7 @@
 void f_many2(int a, S<800 - 8 - 2> s, int c, double d) {
   NO_OVERFLOW(a);
   NO_OVERFLOW(s);
-  OVERFLOW(c);
+  PARTIAL_OVERFLOW(c);
   OVERFLOW(d);
 }
 


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D17129.49451.patch
Type: text/x-patch
Size: 1348 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20160301/5838cec8/attachment.bin>