[compiler-rt] r254292 - [asan] Old Linux kernels (< 3.0) don't define ARM_VFPREGS_SIZE that leads to

[Yury Gribov via llvm-commits]

Author: ygribov
Date: Mon Nov 30 03:19:22 2015
New Revision: 254292

URL: http://llvm.org/viewvc/llvm-project?rev=254292&view=rev
Log:
[asan] Old Linux kernels (< 3.0) don't define ARM_VFPREGS_SIZE that leads to
build errors on ARM. Define it internally to avoid such errors.

Patch by Max Ostapenko.

Differential Revision: http://reviews.llvm.org/D14921

Modified:
    compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_limits_posix.cc

Modified: compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_limits_posix.cc?rev=254292&r1=254291&r2=254292&view=diff
==============================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_limits_posix.cc (original)
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_limits_posix.cc Mon Nov 30 03:19:22 2015
@@ -123,6 +123,10 @@
 #  include <asm/ptrace.h>
 #  ifdef __arm__
 typedef struct user_fpregs elf_fpregset_t;
+#   define ARM_VFPREGS_SIZE_ASAN (32 * 8 /*fpregs*/ + 4 /*fpscr*/)
+#   if !defined(ARM_VFPREGS_SIZE)
+#     define ARM_VFPREGS_SIZE ARM_VFPREGS_SIZE_ASAN
+#   endif
 #  endif
 # endif
 # include <semaphore.h>
@@ -1264,4 +1268,8 @@ CHECK_SIZE_AND_OFFSET(cookie_io_function
 CHECK_TYPE_SIZE(sem_t);
 #endif
 
+#if SANITIZER_LINUX && defined(__arm__)
+COMPILER_CHECK(ARM_VFPREGS_SIZE == ARM_VFPREGS_SIZE_ASAN);
+#endif
+
 #endif // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_MAC