libsanitizer: merge from master (78d3e0a4f1406b17cdecc77540e09210670fe9a9).

diff --git a/libsanitizer/MERGE b/libsanitizer/MERGE
index ed4b01332fa9bf166c325c4ac2136e7c09f97e0e..c3463bffbae757e92c01081baa515a15eb1e288f 100644 (file)
--- a/libsanitizer/MERGE
+++ b/libsanitizer/MERGE
@@ -1,4 +1,4 @@
-c86b4503a94c277534ce4b9a5c015a6ac151b98a
+78d3e0a4f1406b17cdecc77540e09210670fe9a9
 
 The first line of this file holds the git revision number of the
 last merge done from the master library sources.

diff --git a/libsanitizer/asan/asan_errors.cpp b/libsanitizer/asan/asan_errors.cpp
index 686ca7cc2b0e6446d95761a68d122f8942877392..7cd9fe911afa817ac0d4d6fbd1eb2be5c59aa808 100644 (file)
--- a/libsanitizer/asan/asan_errors.cpp
+++ b/libsanitizer/asan/asan_errors.cpp
@@ -538,7 +538,8 @@ static void PrintLegend(InternalScopedString *str) {
 static void PrintShadowBytes(InternalScopedString *str, const char *before,
                              u8 *bytes, u8 *guilty, uptr n) {
   Decorator d;
-  if (before) str->append("%s%p:", before, bytes);
+  if (before)
+    str->append("%s%p:", before, (void *)bytes);
   for (uptr i = 0; i < n; i++) {
     u8 *p = bytes + i;
     const char *before =

diff --git a/libsanitizer/asan/asan_fake_stack.cpp b/libsanitizer/asan/asan_fake_stack.cpp
index bf5c342ee59db5215648f1d553e93b5ed1ee331a..07681c10de91a067f8db68a88ecb65f68e1e22c9 100644 (file)
--- a/libsanitizer/asan/asan_fake_stack.cpp
+++ b/libsanitizer/asan/asan_fake_stack.cpp
@@ -54,10 +54,11 @@ FakeStack *FakeStack::Create(uptr stack_size_log) {
                              : MmapOrDie(size, "FakeStack"));
   res->stack_size_log_ = stack_size_log;
   u8 *p = reinterpret_cast<u8 *>(res);
-  VReport(1, "T%d: FakeStack created: %p -- %p stack_size_log: %zd; "
+  VReport(1,
+          "T%d: FakeStack created: %p -- %p stack_size_log: %zd; "
           "mmapped %zdK, noreserve=%d \n",
-          GetCurrentTidOrInvalid(), p,
-          p + FakeStack::RequiredSize(stack_size_log), stack_size_log,
+          GetCurrentTidOrInvalid(), (void *)p,
+          (void *)(p + FakeStack::RequiredSize(stack_size_log)), stack_size_log,
           size >> 10, flags()->uar_noreserve);
   return res;
 }

diff --git a/libsanitizer/asan/asan_globals.cpp b/libsanitizer/asan/asan_globals.cpp
index acb9f5cbd0f6d9591075a0a35ddf29331e2b04f8..5f56fe6f457d12ffd9478eb14fac199adb4fec0e 100644 (file)
--- a/libsanitizer/asan/asan_globals.cpp
+++ b/libsanitizer/asan/asan_globals.cpp
@@ -89,8 +89,8 @@ static void ReportGlobal(const Global &g, const char *prefix) {
       g.module_name, g.has_dynamic_init, (void *)g.odr_indicator);
   if (g.location) {
     Report("  location (%p): name=%s[%p], %d %d\n", (void *)g.location,
-           g.location->filename, g.location->filename, g.location->line_no,
-           g.location->column_no);
+           g.location->filename, (void *)g.location->filename,
+           g.location->line_no, g.location->column_no);
   }
 }
 
@@ -154,6 +154,23 @@ static void CheckODRViolationViaIndicator(const Global *g) {
   }
 }
 
+// Check ODR violation for given global G by checking if it's already poisoned.
+// We use this method in case compiler doesn't use private aliases for global
+// variables.
+static void CheckODRViolationViaPoisoning(const Global *g) {
+  if (__asan_region_is_poisoned(g->beg, g->size_with_redzone)) {
+    // This check may not be enough: if the first global is much larger
+    // the entire redzone of the second global may be within the first global.
+    for (ListOfGlobals *l = list_of_all_globals; l; l = l->next) {
+      if (g->beg == l->g->beg &&
+          (flags()->detect_odr_violation >= 2 || g->size != l->g->size) &&
+          !IsODRViolationSuppressed(g->name))
+        ReportODRViolation(g, FindRegistrationSite(g),
+                           l->g, FindRegistrationSite(l->g));
+    }
+  }
+}
+
 // Clang provides two different ways for global variables protection:
 // it can poison the global itself or its private alias. In former
 // case we may poison same symbol multiple times, that can help us to
@@ -199,6 +216,8 @@ static void RegisterGlobal(const Global *g) {
     // where two globals with the same name are defined in different modules.
     if (UseODRIndicator(g))
       CheckODRViolationViaIndicator(g);
+    else
+      CheckODRViolationViaPoisoning(g);
   }
   if (CanPoisonMemory())
     PoisonRedZones(*g);

diff --git a/libsanitizer/asan/asan_interceptors.h b/libsanitizer/asan/asan_interceptors.h
index 105c672cc245144a7efbb6955f99a8b72f8ecb0a..047b044c8bf47da51e74436dc088b2740fd162dc 100644 (file)
--- a/libsanitizer/asan/asan_interceptors.h
+++ b/libsanitizer/asan/asan_interceptors.h
@@ -81,12 +81,7 @@ void InitializePlatformInterceptors();
 #if ASAN_HAS_EXCEPTIONS && !SANITIZER_WINDOWS && !SANITIZER_SOLARIS && \
     !SANITIZER_NETBSD
 # define ASAN_INTERCEPT___CXA_THROW 1
-# if ! defined(ASAN_HAS_CXA_RETHROW_PRIMARY_EXCEPTION) \
-     || ASAN_HAS_CXA_RETHROW_PRIMARY_EXCEPTION
-#   define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 1
-# else
-#   define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 0
-# endif
+# define ASAN_INTERCEPT___CXA_RETHROW_PRIMARY_EXCEPTION 1
 # if defined(_GLIBCXX_SJLJ_EXCEPTIONS) || (SANITIZER_IOS && defined(__arm__))
 #  define ASAN_INTERCEPT__UNWIND_SJLJ_RAISEEXCEPTION 1
 # else

diff --git a/libsanitizer/asan/asan_mapping.h b/libsanitizer/asan/asan_mapping.h
index 4b0037fced388ff2739e294c94aa50b014c28f89..e5a7f2007aea8b8208e929e08ee675a55cd252eb 100644 (file)
--- a/libsanitizer/asan/asan_mapping.h
+++ b/libsanitizer/asan/asan_mapping.h
@@ -165,7 +165,7 @@ static const u64 kAArch64_ShadowOffset64 = 1ULL << 36;
 static const u64 kRiscv64_ShadowOffset64 = 0xd55550000;
 static const u64 kMIPS32_ShadowOffset32 = 0x0aaa0000;
 static const u64 kMIPS64_ShadowOffset64 = 1ULL << 37;
-static const u64 kPPC64_ShadowOffset64 = 1ULL << 41;
+static const u64 kPPC64_ShadowOffset64 = 1ULL << 44;
 static const u64 kSystemZ_ShadowOffset64 = 1ULL << 52;
 static const u64 kSPARC64_ShadowOffset64 = 1ULL << 43;  // 0x80000000000
 static const u64 kFreeBSD_ShadowOffset32 = 1ULL << 30;  // 0x40000000

diff --git a/libsanitizer/hwasan/hwasan_report.cpp b/libsanitizer/hwasan/hwasan_report.cpp
index 0107b8b772a9d004827b44b4ac79703454c58736..66d3d155d409438cf6e46c59ee746fbded3fad18 100644 (file)
--- a/libsanitizer/hwasan/hwasan_report.cpp
+++ b/libsanitizer/hwasan/hwasan_report.cpp
@@ -518,7 +518,7 @@ static void PrintTagInfoAroundAddr(tag_t *tag_ptr, uptr num_rows,
   InternalScopedString s;
   for (tag_t *row = beg_row; row < end_row; row += row_len) {
     s.append("%s", row == center_row_beg ? "=>" : "  ");
-    s.append("%p:", row);
+    s.append("%p:", (void *)row);
     for (uptr i = 0; i < row_len; i++) {
       s.append("%s", row + i == tag_ptr ? "[" : " ");
       print_tag(s, &row[i]);

diff --git a/libsanitizer/hwasan/hwasan_thread.cpp b/libsanitizer/hwasan/hwasan_thread.cpp
index 5b65718c4d3b2587354df9e289153303ad2137b9..5f05446ac7a3b90e49b34c0936f09441c7ca57e4 100644 (file)
--- a/libsanitizer/hwasan/hwasan_thread.cpp
+++ b/libsanitizer/hwasan/hwasan_thread.cpp
@@ -108,10 +108,9 @@ void Thread::Destroy() {
 }
 
 void Thread::Print(const char *Prefix) {
-  Printf("%sT%zd %p stack: [%p,%p) sz: %zd tls: [%p,%p)\n", Prefix,
-         unique_id_, this, stack_bottom(), stack_top(),
-         stack_top() - stack_bottom(),
-         tls_begin(), tls_end());
+  Printf("%sT%zd %p stack: [%p,%p) sz: %zd tls: [%p,%p)\n", Prefix, unique_id_,
+         (void *)this, stack_bottom(), stack_top(),
+         stack_top() - stack_bottom(), tls_begin(), tls_end());
 }
 
 static u32 xorshift(u32 state) {

diff --git a/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp b/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
index fc5619e4b37cb3a3db0bb5236169e25b59f436b3..7ce9e25da342d8d70312d956a68b137f29326eb8 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cpp
@@ -759,13 +759,9 @@ u32 GetNumberOfCPUs() {
 #elif SANITIZER_SOLARIS
   return sysconf(_SC_NPROCESSORS_ONLN);
 #else
-#if defined(CPU_COUNT)
   cpu_set_t CPUs;
   CHECK_EQ(sched_getaffinity(0, sizeof(cpu_set_t), &CPUs), 0);
   return CPU_COUNT(&CPUs);
-#else
-  return 1;
-#endif
 #endif
 }
 

diff --git a/libsanitizer/sanitizer_common/sanitizer_mac.cpp b/libsanitizer/sanitizer_common/sanitizer_mac.cpp
index c1eb004c6fab5c82ecbc8e411d4dd0ddf790e547..36a9d509804216f1e1175a9225340636edf55e44 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_mac.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_mac.cpp
@@ -37,7 +37,7 @@
 extern char **environ;
 #endif
 
-#if defined(__has_include) && __has_include(<os/trace.h>) && defined(__BLOCKS__)
+#if defined(__has_include) && __has_include(<os/trace.h>)
 #define SANITIZER_OS_TRACE 1
 #include <os/trace.h>
 #else
@@ -70,15 +70,7 @@ extern "C" {
 #include <mach/mach_time.h>
 #include <mach/vm_statistics.h>
 #include <malloc/malloc.h>
-#if defined(__has_builtin) && __has_builtin(__builtin_os_log_format)
-# include <os/log.h>
-#else
-   /* Without support for __builtin_os_log_format, fall back to the older
-      method.  */
-# define OS_LOG_DEFAULT 0
-# define os_log_error(A,B,C) \
-  asl_log(nullptr, nullptr, ASL_LEVEL_ERR, "%s", (C));
-#endif
+#include <os/log.h>
 #include <pthread.h>
 #include <sched.h>
 #include <signal.h>

diff --git a/libsanitizer/sanitizer_common/sanitizer_mac.h b/libsanitizer/sanitizer_common/sanitizer_mac.h
index 96a5986a47a34e7ca2ee59d6553c0bf9bb60ba16..0b6af5a3c0edc649c4d65dfd1a6ca1bce13aa9b9 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_mac.h
+++ b/libsanitizer/sanitizer_common/sanitizer_mac.h
@@ -14,26 +14,6 @@
 
 #include "sanitizer_common.h"
 #include "sanitizer_platform.h"
-
-/* TARGET_OS_OSX is not present in SDKs before Darwin16 (macOS 10.12) use
-   TARGET_OS_MAC (we have no support for iOS in any form for these versions,
-   so there's no ambiguity).  */
-#if !defined(TARGET_OS_OSX) && TARGET_OS_MAC
-# define TARGET_OS_OSX 1
-#endif
-
-/* Other TARGET_OS_xxx are not present on earlier versions, define them to
-   0 (we have no support for them; they are not valid targets anyway).  */
-#ifndef TARGET_OS_IOS
-#define TARGET_OS_IOS 0
-#endif
-#ifndef TARGET_OS_TV
-#define TARGET_OS_TV 0
-#endif
-#ifndef TARGET_OS_WATCH
-#define TARGET_OS_WATCH 0
-#endif
-
 #if SANITIZER_MAC
 #include "sanitizer_posix.h"
 

diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cpp b/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cpp
index 2b1a2f7932cb27c4b0b3ea7d354bbb11935b9b71..9d577570ea1e2e219b4a08c64f450794d6a145d7 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_linux.cpp
@@ -26,10 +26,7 @@
 
 // With old kernels (and even new kernels on powerpc) asm/stat.h uses types that
 // are not defined anywhere in userspace headers. Fake them. This seems to work
-// fine with newer headers, too.  Beware that with <sys/stat.h>, struct stat
-// takes the form of struct stat64 on 32-bit platforms if _FILE_OFFSET_BITS=64.
-// Also, for some platforms (e.g. mips) there are additional members in the
-// <sys/stat.h> struct stat:s.
+// fine with newer headers, too.
 #include <linux/posix_types.h>
 #  if defined(__x86_64__) || defined(__mips__) || defined(__hexagon__)
 #    include <sys/stat.h>

diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
index da53b5abef273539b84b1072dd7243507105dfa3..d69b344dd613d6e2f25c39d839cbf5a899ddf81d 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
+++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h
@@ -83,7 +83,7 @@ const unsigned struct_kernel_stat64_sz = 104;
 #elif defined(__mips__)
 const unsigned struct_kernel_stat_sz = SANITIZER_ANDROID
                                            ? FIRST_32_SECOND_64(104, 128)
-                                           : FIRST_32_SECOND_64(144, 216);
+                                           : FIRST_32_SECOND_64(160, 216);
 const unsigned struct_kernel_stat64_sz = 104;
 #elif defined(__s390__) && !defined(__s390x__)
 const unsigned struct_kernel_stat_sz = 64;

diff --git a/libsanitizer/sanitizer_common/sanitizer_stacktrace.cpp b/libsanitizer/sanitizer_common/sanitizer_stacktrace.cpp
index 5a12422fc6fc86dfe09a5d7e17ee72dabc3593f8..37e9e6dd08d7b2bc3eba2582536ef98cde0228a3 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_stacktrace.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_stacktrace.cpp
@@ -86,8 +86,8 @@ static inline uhwptr *GetCanonicFrame(uptr bp,
   // Nope, this does not look right either. This means the frame after next does
   // not have a valid frame pointer, but we can still extract the caller PC.
   // Unfortunately, there is no way to decide between GCC and LLVM frame
-  // layouts. Assume GCC.
-  return bp_prev - 1;
+  // layouts. Assume LLVM.
+  return bp_prev;
 #else
   return (uhwptr*)bp;
 #endif
@@ -110,21 +110,14 @@ void BufferedStackTrace::UnwindFast(uptr pc, uptr bp, uptr stack_top,
          IsAligned((uptr)frame, sizeof(*frame)) &&
          size < max_depth) {
 #ifdef __powerpc__
-    // PowerPC ABIs specify that the return address is saved on the
-    // *caller's* stack frame.  Thus we must dereference the back chain
-    // to find the caller frame before extracting it.
+    // PowerPC ABIs specify that the return address is saved at offset
+    // 16 of the *caller's* stack frame.  Thus we must dereference the
+    // back chain to find the caller frame before extracting it.
     uhwptr *caller_frame = (uhwptr*)frame[0];
     if (!IsValidFrame((uptr)caller_frame, stack_top, bottom) ||
         !IsAligned((uptr)caller_frame, sizeof(uhwptr)))
       break;
-    // For most ABIs the offset where the return address is saved is two
-    // register sizes.  The exception is the SVR4 ABI, which uses an
-    // offset of only one register size.
-#ifdef _CALL_SYSV
-    uhwptr pc1 = caller_frame[1];
-#else
     uhwptr pc1 = caller_frame[2];
-#endif
 #elif defined(__s390__)
     uhwptr pc1 = frame[14];
 #elif defined(__riscv)

diff --git a/libsanitizer/sanitizer_common/sanitizer_stacktrace.h b/libsanitizer/sanitizer_common/sanitizer_stacktrace.h
index ea330f36f7d79af6c4192d0236796cce2afd7309..11c6154b09ea75c2ff0856479fda917aecc484a4 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_stacktrace.h
+++ b/libsanitizer/sanitizer_common/sanitizer_stacktrace.h
@@ -209,11 +209,11 @@ static inline bool IsValidFrame(uptr frame, uptr stack_top, uptr stack_bottom) {
 // StackTrace::GetCurrentPc() faster.
 #if defined(__x86_64__)
 #  define GET_CURRENT_PC()                \
-    ({                                    \
+    (__extension__({                      \
       uptr pc;                            \
       asm("lea 0(%%rip), %0" : "=r"(pc)); \
       pc;                                 \
-    })
+    }))
 #else
 #  define GET_CURRENT_PC() StackTrace::GetCurrentPc()
 #endif

diff --git a/libsanitizer/sanitizer_common/sanitizer_stacktrace_printer.cpp b/libsanitizer/sanitizer_common/sanitizer_stacktrace_printer.cpp
index ad638a84a5933bc0642a6325e07438803f146ecf..c6356dae23c13139c0376210b92e49137abe34ee 100644 (file)
--- a/libsanitizer/sanitizer_common/sanitizer_stacktrace_printer.cpp
+++ b/libsanitizer/sanitizer_common/sanitizer_stacktrace_printer.cpp
@@ -198,7 +198,8 @@ void RenderFrame(InternalScopedString *buffer, const char *format, int frame_no,
       }
       break;
     default:
-      Report("Unsupported specifier in stack frame format: %c (%p)!\n", *p, p);
+      Report("Unsupported specifier in stack frame format: %c (%p)!\n", *p,
+             (void *)p);
       Die();
     }
   }
@@ -250,7 +251,7 @@ void RenderData(InternalScopedString *buffer, const char *format,
         break;
       default:
         Report("Unsupported specifier in stack frame format: %c (%p)!\n", *p,
-               p);
+               (void *)p);
         Die();
     }
   }

diff --git a/libsanitizer/tsan/tsan_rtl_ppc64.S b/libsanitizer/tsan/tsan_rtl_ppc64.S
index 9e533a71a9c477ecae59f09ab431b2664554d998..8285e21aa1ec7a797dfcf4840ee5a7851106b497 100644 (file)
--- a/libsanitizer/tsan/tsan_rtl_ppc64.S
+++ b/libsanitizer/tsan/tsan_rtl_ppc64.S
@@ -1,6 +1,5 @@
 #include "tsan_ppc_regs.h"
 
-        .machine altivec
         .section .text
         .hidden __tsan_setjmp
         .globl _setjmp

diff --git a/libsanitizer/ubsan/ubsan_flags.cpp b/libsanitizer/ubsan/ubsan_flags.cpp
index 9a66bd37518b3a0606049b761ffdd7ddf3c3c714..25cefd46ce27ced7fb6092d8d04b5074c56ebe95 100644 (file)
--- a/libsanitizer/ubsan/ubsan_flags.cpp
+++ b/libsanitizer/ubsan/ubsan_flags.cpp
@@ -50,7 +50,6 @@ void InitializeFlags() {
   {
     CommonFlags cf;
     cf.CopyFrom(*common_flags());
-    cf.print_summary = false;
     cf.external_symbolizer_path = GetFlag("UBSAN_SYMBOLIZER_PATH");
     OverrideCommonFlags(cf);
   }

diff --git a/libsanitizer/ubsan/ubsan_handlers.cpp b/libsanitizer/ubsan/ubsan_handlers.cpp
index 2184625aa6e9496eb5c933823a24a081a0599312..e201e6bba22078e3d873aeb5792b98ecd860cdaa 100644 (file)
--- a/libsanitizer/ubsan/ubsan_handlers.cpp
+++ b/libsanitizer/ubsan/ubsan_handlers.cpp
@@ -894,21 +894,6 @@ void __ubsan_handle_cfi_bad_type(CFICheckFailData *Data, ValueHandle Vtable,
 
 }  // namespace __ubsan
 
-void __ubsan::__ubsan_handle_cfi_bad_icall(CFIBadIcallData *CallData,
-                                           ValueHandle Function) {
-  GET_REPORT_OPTIONS(false);
-  CFICheckFailData Data = {CFITCK_ICall, CallData->Loc, CallData->Type};
-  handleCFIBadIcall(&Data, Function, Opts);
-}
-
-void __ubsan::__ubsan_handle_cfi_bad_icall_abort(CFIBadIcallData *CallData,
-                                                 ValueHandle Function) {
-  GET_REPORT_OPTIONS(true);
-  CFICheckFailData Data = {CFITCK_ICall, CallData->Loc, CallData->Type};
-  handleCFIBadIcall(&Data, Function, Opts);
-  Die();
-}
-
 void __ubsan::__ubsan_handle_cfi_check_fail(CFICheckFailData *Data,
                                             ValueHandle Value,
                                             uptr ValidVtable) {

diff --git a/libsanitizer/ubsan/ubsan_handlers.h b/libsanitizer/ubsan/ubsan_handlers.h
index 9f412353fc0ee9719d824dd4b2db75fb97587354..219fb15de55fe02a4544422095baa0d8532baaa0 100644 (file)
--- a/libsanitizer/ubsan/ubsan_handlers.h
+++ b/libsanitizer/ubsan/ubsan_handlers.h
@@ -215,20 +215,12 @@ enum CFITypeCheckKind : unsigned char {
   CFITCK_VMFCall,
 };
 
-struct CFIBadIcallData {
-  SourceLocation Loc;
-  const TypeDescriptor &Type;
-};
-
 struct CFICheckFailData {
   CFITypeCheckKind CheckKind;
   SourceLocation Loc;
   const TypeDescriptor &Type;
 };
 
-/// \brief Handle control flow integrity failure for indirect function calls.
-RECOVERABLE(cfi_bad_icall, CFIBadIcallData *Data, ValueHandle Function)
-
 /// \brief Handle control flow integrity failures.
 RECOVERABLE(cfi_check_fail, CFICheckFailData *Data, ValueHandle Function,
             uptr VtableIsValid)

diff --git a/libsanitizer/ubsan/ubsan_platform.h b/libsanitizer/ubsan/ubsan_platform.h
index ad3e883f0f35e9af401cf79fac1b48410ee3fb77..d2cc2e10bd2f023b8d9aa1685a79a192a6d1e1e8 100644 (file)
--- a/libsanitizer/ubsan/ubsan_platform.h
+++ b/libsanitizer/ubsan/ubsan_platform.h
@@ -12,7 +12,6 @@
 #ifndef UBSAN_PLATFORM_H
 #define UBSAN_PLATFORM_H
 
-#ifndef CAN_SANITIZE_UB
 // Other platforms should be easy to add, and probably work as-is.
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__APPLE__) ||        \
     defined(__NetBSD__) || defined(__DragonFly__) ||                           \
@@ -22,6 +21,5 @@
 #else
 # define CAN_SANITIZE_UB 0
 #endif
-#endif //CAN_SANITIZE_UB
 
 #endif