[Sanitizers] Scudo allocator set errno on failure.

Summary:
Set proper errno code on alloction failure and change pvalloc and
posix_memalign implementation to satisfy their man-specified
requirements.

Reviewers: cryptoad

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D35429

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@308053 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 4 deletions

diff --git a/test/scudo/memalign.cpp b/test/scudo/memalign.cpp
index 856128f24..82c54af8b 100644
--- a/test/scudo/memalign.cpp
+++ b/test/scudo/memalign.cpp
@@ -65,15 +65,15 @@ int main(int argc, char **argv)
     // Size is not a multiple of alignment.
     p = aligned_alloc(alignment, size >> 1);
     assert(!p);
-    p = (void *)0x42UL;
+    void *p_unchanged = (void *)0x42UL;
+    p = p_unchanged;
     // Alignment is not a power of 2.
     err = posix_memalign(&p, 3, size);
-    assert(!p);
+    assert(p == p_unchanged);
     assert(err == EINVAL);
-    p = (void *)0x42UL;
     // Alignment is a power of 2, but not a multiple of size(void *).
     err = posix_memalign(&p, 2, size);
-    assert(!p);
+    assert(p == p_unchanged);
     assert(err == EINVAL);
   }
   return 0;