[asan] adding support of 32-bit address sanitizer for MIPS

Summary: The patch supports both the clang cross-compiler and native compiler

Patch by Kumar Sukhani <Kumar.Sukhani@imgtec.com>

Test Plan:
Kumar had the following asan test results when compiled on a MIPS board:

  Expected Passes    : 96
  Expected Failures  : 2
  Unsupported Tests  : 84
  Unexpected Passes  : 4
  Unexpected Failures: 19

The list of unexpected failures can be found in the review.

Reviewers: kcc, petarj, dsanders

Reviewed By: kcc

Subscribers: farazs, kcc, llvm-commits

Differential Revision: http://reviews.llvm.org/D4208


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@211587 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 28 insertions, 6 deletions

diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.h b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
index a7698fd9b..83efe7dbc 100644
--- a/lib/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -67,6 +67,13 @@ namespace __sanitizer {
 #elif defined(__powerpc64__)
   const unsigned struct_kernel_stat_sz = 144;
   const unsigned struct_kernel_stat64_sz = 104;
+#elif defined(__mips__)
+  #if SANITIZER_WORDSIZE == 64
+  const unsigned struct_kernel_stat_sz = 216;
+  #else
+  const unsigned struct_kernel_stat_sz = 144;
+  #endif
+  const unsigned struct_kernel_stat64_sz = 104;
 #endif
   struct __sanitizer_perf_event_attr {
     unsigned type;
@@ -162,6 +169,12 @@ namespace __sanitizer {
     unsigned __seq;
     u64 __unused1;
     u64 __unused2;
+#elif defined(__mips__)
+    unsigned int mode;
+    unsigned short __seq;
+    unsigned short __pad1;
+    unsigned long __unused1;
+    unsigned long __unused2;
 #else
     unsigned short mode;
     unsigned short __pad1;
@@ -190,15 +203,15 @@ namespace __sanitizer {
     u64 shm_ctime;
   #else
     uptr shm_atime;
-  #ifndef _LP64
+  #if !defined(_LP64) && !defined(__mips__)
     uptr __unused1;
   #endif
     uptr shm_dtime;
-  #ifndef _LP64
+  #if !defined(_LP64) && !defined(__mips__)
     uptr __unused2;
   #endif
     uptr shm_ctime;
-  #ifndef _LP64
+  #if !defined(_LP64) && !defined(__mips__)
     uptr __unused3;
   #endif
   #endif
@@ -445,7 +458,8 @@ namespace __sanitizer {
 #endif
 
 #if SANITIZER_LINUX || SANITIZER_FREEBSD
-#if defined(_LP64) || defined(__x86_64__) || defined(__powerpc__)
+#if defined(_LP64) || defined(__x86_64__) || defined(__powerpc__)\
+                   || defined(__mips__)
   typedef unsigned __sanitizer___kernel_uid_t;
   typedef unsigned __sanitizer___kernel_gid_t;
 #else
@@ -458,7 +472,7 @@ namespace __sanitizer {
   typedef long __sanitizer___kernel_off_t;
 #endif
 
-#if defined(__powerpc__) || defined(__aarch64__)
+#if defined(__powerpc__) || defined(__aarch64__) || defined(__mips__)
   typedef unsigned int __sanitizer___kernel_old_uid_t;
   typedef unsigned int __sanitizer___kernel_old_gid_t;
 #else
@@ -498,6 +512,9 @@ namespace __sanitizer {
 
   // Linux system headers define the 'sa_handler' and 'sa_sigaction' macros.
   struct __sanitizer_sigaction {
+#if defined(__mips__) && !SANITIZER_FREEBSD
+    unsigned int sa_flags;
+#endif
     union {
       void (*sigaction)(int sig, void *siginfo, void *uctx);
       void (*handler)(int sig);
@@ -507,11 +524,16 @@ namespace __sanitizer {
     __sanitizer_sigset_t sa_mask;
 #else
     __sanitizer_sigset_t sa_mask;
+#ifndef __mips__
     int sa_flags;
 #endif
+#endif
 #if SANITIZER_LINUX
     void (*sa_restorer)();
 #endif
+#if defined(__mips__) && (SANITIZER_WORDSIZE == 32)
+    int sa_resv[1];
+#endif
   };
 
 #if SANITIZER_FREEBSD
@@ -725,7 +747,7 @@ struct __sanitizer_obstack {
 
 #define IOC_NRBITS 8
 #define IOC_TYPEBITS 8
-#if defined(__powerpc__) || defined(__powerpc64__)
+#if defined(__powerpc__) || defined(__powerpc64__) || defined(__mips__)
 #define IOC_SIZEBITS 13
 #define IOC_DIRBITS 3
 #define IOC_NONE 1U