[Sanitizers] Consolidate internal errno definitions.

Move internal errno definitions to common to be shared by all sanitizers
and to be used by allocators.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@307233 91177308-0d34-0410-b5e6-96231b3b80d8

10 files changed, 117 insertions, 34 deletions

diff --git a/lib/msan/msan_interceptors.cc b/lib/msan/msan_interceptors.cc
index ce8444a3b..069777c7f 100644
--- a/lib/msan/msan_interceptors.cc
+++ b/lib/msan/msan_interceptors.cc
@@ -27,6 +27,7 @@
 #include "sanitizer_common/sanitizer_allocator_internal.h"
 #include "sanitizer_common/sanitizer_atomic.h"
 #include "sanitizer_common/sanitizer_common.h"
+#include "sanitizer_common/sanitizer_errno.h"
 #include "sanitizer_common/sanitizer_stackdepot.h"
 #include "sanitizer_common/sanitizer_libc.h"
 #include "sanitizer_common/sanitizer_linux.h"
@@ -48,15 +49,9 @@ DECLARE_REAL(SIZE_T, strnlen, const char *s, SIZE_T maxlen)
 DECLARE_REAL(void *, memcpy, void *dest, const void *src, uptr n)
 DECLARE_REAL(void *, memset, void *dest, int c, uptr n)
 
-#if SANITIZER_FREEBSD
-#define __errno_location __error
-#endif
-
 // True if this is a nested interceptor.
 static THREADLOCAL int in_interceptor_scope;
 
-extern "C" int *__errno_location(void);
-
 struct InterceptorScope {
   InterceptorScope() { ++in_interceptor_scope; }
   ~InterceptorScope() { --in_interceptor_scope; }
@@ -915,7 +910,7 @@ INTERCEPTOR(void *, mmap, void *addr, SIZE_T length, int prot, int flags,
   ENSURE_MSAN_INITED();
   if (addr && !MEM_IS_APP(addr)) {
     if (flags & map_fixed) {
-      *__errno_location() = errno_EINVAL;
+      errno = errno_EINVAL;
       return (void *)-1;
     } else {
       addr = nullptr;
@@ -933,7 +928,7 @@ INTERCEPTOR(void *, mmap64, void *addr, SIZE_T length, int prot, int flags,
   ENSURE_MSAN_INITED();
   if (addr && !MEM_IS_APP(addr)) {
     if (flags & map_fixed) {
-      *__errno_location() = errno_EINVAL;
+      errno = errno_EINVAL;
       return (void *)-1;
     } else {
       addr = nullptr;
diff --git a/lib/sanitizer_common/CMakeLists.txt b/lib/sanitizer_common/CMakeLists.txt
index bf8459ef5..26ea071ef 100644
--- a/lib/sanitizer_common/CMakeLists.txt
+++ b/lib/sanitizer_common/CMakeLists.txt
@@ -6,6 +6,7 @@ set(SANITIZER_SOURCES_NOTERMINATION
   sanitizer_common.cc
   sanitizer_deadlock_detector1.cc
   sanitizer_deadlock_detector2.cc
+  sanitizer_errno.cc
   sanitizer_flags.cc
   sanitizer_flag_parser.cc
   sanitizer_libc.cc
@@ -92,6 +93,8 @@ set(SANITIZER_HEADERS
   sanitizer_common_syscalls.inc
   sanitizer_deadlock_detector.h
   sanitizer_deadlock_detector_interface.h
+  sanitizer_errno.h
+  sanitizer_errno_codes.h
   sanitizer_flag_parser.h
   sanitizer_flags.h
   sanitizer_flags.inc
diff --git a/lib/sanitizer_common/sanitizer_common_interceptors.inc b/lib/sanitizer_common/sanitizer_common_interceptors.inc
index 459530aa9..8607bf449 100644
--- a/lib/sanitizer_common/sanitizer_common_interceptors.inc
+++ b/lib/sanitizer_common/sanitizer_common_interceptors.inc
@@ -40,6 +40,7 @@
 
 #include "interception/interception.h"
 #include "sanitizer_addrhashmap.h"
+#include "sanitizer_errno.h"
 #include "sanitizer_placement_new.h"
 #include "sanitizer_platform_interceptors.h"
 #include "sanitizer_tls_get_addr.h"
diff --git a/lib/sanitizer_common/sanitizer_errno.cc b/lib/sanitizer_common/sanitizer_errno.cc
new file mode 100644
index 000000000..a6f9fc612
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_errno.cc
@@ -0,0 +1,35 @@
+//===-- sanitizer_errno.cc --------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between sanitizers run-time libraries.
+//
+// Defines errno to avoid including errno.h and its dependencies into other
+// files (e.g. interceptors are not supposed to include any system headers).
+//
+//===----------------------------------------------------------------------===//
+
+#include "sanitizer_errno_codes.h"
+#include "sanitizer_internal_defs.h"
+
+#include <errno.h>
+
+namespace __sanitizer {
+
+COMPILER_CHECK(errno_ENOMEM == ENOMEM);
+COMPILER_CHECK(errno_EBUSY == EBUSY);
+COMPILER_CHECK(errno_EINVAL == EINVAL);
+
+// EOWNERDEAD is not present in some older platforms.
+#if defined(EOWNERDEAD)
+extern const int errno_EOWNERDEAD = EOWNERDEAD;
+#else
+extern const int errno_EOWNERDEAD = -1;
+#endif
+
+}  // namespace __sanitizer
diff --git a/lib/sanitizer_common/sanitizer_errno.h b/lib/sanitizer_common/sanitizer_errno.h
new file mode 100644
index 000000000..c405307ba
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_errno.h
@@ -0,0 +1,35 @@
+//===-- sanitizer_errno.h ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between sanitizers run-time libraries.
+//
+// Defines errno to avoid including errno.h and its dependencies into sensitive
+// files (e.g. interceptors are not supposed to include any system headers).
+// It's ok to use errno.h directly when your file already depend on other system
+// includes though.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SANITIZER_ERRNO_H
+#define SANITIZER_ERRNO_H
+
+#include "sanitizer_errno_codes.h"
+#include "sanitizer_platform.h"
+
+#if SANITIZER_FREEBSD || SANITIZER_MAC
+#  define __errno_location __error
+#elif SANITIZER_ANDROID
+#  define __errno_location __errno
+#endif
+
+extern "C" int *__errno_location();
+
+#define errno (*__errno_location())
+
+#endif  // SANITIZER_ERRNO_H
diff --git a/lib/sanitizer_common/sanitizer_errno_codes.h b/lib/sanitizer_common/sanitizer_errno_codes.h
new file mode 100644
index 000000000..dba774c5b
--- /dev/null
+++ b/lib/sanitizer_common/sanitizer_errno_codes.h
@@ -0,0 +1,34 @@
+//===-- sanitizer_errno_codes.h ---------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file is shared between sanitizers run-time libraries.
+//
+// Defines errno codes to avoid including errno.h and its dependencies into
+// sensitive files (e.g. interceptors are not supposed to include any system
+// headers).
+// It's ok to use errno.h directly when your file already depend on other system
+// includes though.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef SANITIZER_ERRNO_CODES_H
+#define SANITIZER_ERRNO_CODES_H
+
+namespace __sanitizer {
+
+#define errno_ENOMEM 12
+#define errno_EBUSY 16
+#define errno_EINVAL 22
+
+// Those might not present or their value differ on different platforms.
+extern const int errno_EOWNERDEAD;
+
+}  // namespace __sanitizer
+
+#endif  // SANITIZER_ERRNO_CODES_H
diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
index 683f019d7..83f4fd22f 100644
--- a/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
+++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.cc
@@ -25,7 +25,6 @@
 #endif
 #include <arpa/inet.h>
 #include <dirent.h>
-#include <errno.h>
 #include <grp.h>
 #include <limits.h>
 #include <net/if.h>
@@ -931,14 +930,6 @@ unsigned struct_ElfW_Phdr_sz = sizeof(Elf_Phdr);
   unsigned IOCTL_SNDCTL_DSP_GETOSPACE = SNDCTL_DSP_GETOSPACE;
 #endif // (SANITIZER_LINUX || SANITIZER_FREEBSD) && !SANITIZER_ANDROID
 
-  const int errno_EINVAL = EINVAL;
-// EOWNERDEAD is not present in some older platforms.
-#if defined(EOWNERDEAD)
-  const int errno_EOWNERDEAD = EOWNERDEAD;
-#else
-  const int errno_EOWNERDEAD = -1;
-#endif
-
   const int si_SEGV_MAPERR = SEGV_MAPERR;
   const int si_SEGV_ACCERR = SEGV_ACCERR;
 } // namespace __sanitizer
diff --git a/lib/sanitizer_common/sanitizer_platform_limits_posix.h b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
index 24ffcd7d9..63dcd2a6d 100644
--- a/lib/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/lib/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -1464,9 +1464,6 @@ struct __sanitizer_cookie_io_functions_t {
   extern unsigned IOCTL_PIO_SCRNMAP;
 #endif
 
-  extern const int errno_EINVAL;
-  extern const int errno_EOWNERDEAD;
-
   extern const int si_SEGV_MAPERR;
   extern const int si_SEGV_ACCERR;
 }  // namespace __sanitizer
diff --git a/lib/tsan/rtl/tsan_interceptors.cc b/lib/tsan/rtl/tsan_interceptors.cc
index 334cc326d..5ae02f3b4 100644
--- a/lib/tsan/rtl/tsan_interceptors.cc
+++ b/lib/tsan/rtl/tsan_interceptors.cc
@@ -14,6 +14,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "sanitizer_common/sanitizer_atomic.h"
+#include "sanitizer_common/sanitizer_errno.h"
 #include "sanitizer_common/sanitizer_libc.h"
 #include "sanitizer_common/sanitizer_linux.h"
 #include "sanitizer_common/sanitizer_platform_limits_posix.h"
@@ -34,13 +35,11 @@
 using namespace __tsan;  // NOLINT
 
 #if SANITIZER_FREEBSD || SANITIZER_MAC
-#define __errno_location __error
 #define stdout __stdoutp
 #define stderr __stderrp
 #endif
 
 #if SANITIZER_ANDROID
-#define __errno_location __errno
 #define mallopt(a, b)
 #endif
 
@@ -84,7 +83,6 @@ DECLARE_REAL_AND_INTERCEPTOR(void *, malloc, uptr size)
 DECLARE_REAL_AND_INTERCEPTOR(void, free, void *ptr)
 extern "C" void *pthread_self();
 extern "C" void _exit(int status);
-extern "C" int *__errno_location();
 extern "C" int fileno_unlocked(void *stream);
 extern "C" int dirfd(void *dirp);
 #if !SANITIZER_FREEBSD && !SANITIZER_ANDROID
@@ -98,9 +96,6 @@ const int PTHREAD_MUTEX_RECURSIVE_NP = 1;
 const int PTHREAD_MUTEX_RECURSIVE = 2;
 const int PTHREAD_MUTEX_RECURSIVE_NP = 2;
 #endif
-const int EINVAL = 22;
-const int EBUSY = 16;
-const int EOWNERDEAD = 130;
 #if !SANITIZER_FREEBSD && !SANITIZER_MAC
 const int EPOLL_CTL_ADD = 1;
 #endif
@@ -130,8 +125,6 @@ typedef long long_t;  // NOLINT
 # define F_TLOCK 2      /* Test and lock a region for exclusive use.  */
 # define F_TEST  3      /* Test a region for other processes locks.  */
 
-#define errno (*__errno_location())
-
 typedef void (*sighandler_t)(int sig);
 typedef void (*sigactionhandler_t)(int sig, my_siginfo_t *siginfo, void *uctx);
 
@@ -665,7 +658,7 @@ static bool fix_mmap_addr(void **addr, long_t sz, int flags) {
   if (*addr) {
     if (!IsAppMem((uptr)*addr) || !IsAppMem((uptr)*addr + sz - 1)) {
       if (flags & MAP_FIXED) {
-        errno = EINVAL;
+        errno = errno_EINVAL;
         return false;
       } else {
         *addr = 0;
@@ -1122,7 +1115,7 @@ TSAN_INTERCEPTOR(int, pthread_mutex_init, void *m, void *a) {
 TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) {
   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_destroy, m);
   int res = REAL(pthread_mutex_destroy)(m);
-  if (res == 0 || res == EBUSY) {
+  if (res == 0 || res == errno_EBUSY) {
     MutexDestroy(thr, pc, (uptr)m);
   }
   return res;
@@ -1131,9 +1124,9 @@ TSAN_INTERCEPTOR(int, pthread_mutex_destroy, void *m) {
 TSAN_INTERCEPTOR(int, pthread_mutex_trylock, void *m) {
   SCOPED_TSAN_INTERCEPTOR(pthread_mutex_trylock, m);
   int res = REAL(pthread_mutex_trylock)(m);
-  if (res == EOWNERDEAD)
+  if (res == errno_EOWNERDEAD)
     MutexRepair(thr, pc, (uptr)m);
-  if (res == 0 || res == EOWNERDEAD)
+  if (res == 0 || res == errno_EOWNERDEAD)
     MutexPostLock(thr, pc, (uptr)m, MutexFlagTryLock);
   return res;
 }
@@ -1311,7 +1304,7 @@ TSAN_INTERCEPTOR(int, pthread_barrier_wait, void *b) {
 TSAN_INTERCEPTOR(int, pthread_once, void *o, void (*f)()) {
   SCOPED_INTERCEPTOR_RAW(pthread_once, o, f);
   if (o == 0 || f == 0)
-    return EINVAL;
+    return errno_EINVAL;
   atomic_uint32_t *a;
   if (!SANITIZER_MAC)
     a = static_cast<atomic_uint32_t*>(o);
diff --git a/lib/tsan/rtl/tsan_platform_linux.cc b/lib/tsan/rtl/tsan_platform_linux.cc
index d05c0e701..7d9638c09 100644
--- a/lib/tsan/rtl/tsan_platform_linux.cc
+++ b/lib/tsan/rtl/tsan_platform_linux.cc
@@ -47,7 +47,6 @@
 #include <sys/resource.h>
 #include <sys/stat.h>
 #include <unistd.h>
-#include <errno.h>
 #include <sched.h>
 #include <dlfcn.h>
 #if SANITIZER_LINUX