From: Julian Lettner <jlettner@apple.com>
Date: Fri, 26 Apr 2019 17:29:22 +0000 (+0000)
Subject: [NFC][Sanitizer] Change "return type" of INTERCEPT_FUNCTION to void
X-Git-Tag: llvmorg-10-init~6905
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=aebd3014a5957029ada761109e6d5e1a90d67e18;p=platform%2Fupstream%2Fllvm.git

[NFC][Sanitizer] Change "return type" of INTERCEPT_FUNCTION to void

This temporary change tells us about all the places where the return
value of the INTERCEPT_FUNCTION macro is actually used. In the next
patch I will cleanup the macro and remove GetRealFuncAddress.

Reviewed By: vitalybuka

Differential Revision: https://reviews.llvm.org/D61145

llvm-svn: 359325
---

diff --git a/compiler-rt/lib/asan/asan_interceptors.h b/compiler-rt/lib/asan/asan_interceptors.h
index 903ab59..d4a68e2 100644
--- a/compiler-rt/lib/asan/asan_interceptors.h
+++ b/compiler-rt/lib/asan/asan_interceptors.h
@@ -122,12 +122,16 @@ DECLARE_REAL(char*, strstr, const char *s1, const char *s2)
 #if !SANITIZER_MAC
 #define ASAN_INTERCEPT_FUNC(name)                                        \
   do {                                                                   \
-    if ((!INTERCEPT_FUNCTION(name) || !REAL(name)))                      \
+    INTERCEPT_FUNCTION(name);                                            \
+    bool same = (& (name) == & WRAP(name));                              \
+    if ((!same || !REAL(name)))                                          \
       VReport(1, "AddressSanitizer: failed to intercept '" #name "'\n"); \
   } while (0)
 #define ASAN_INTERCEPT_FUNC_VER(name, ver)                                     \
   do {                                                                         \
-    if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name)))                   \
+    INTERCEPT_FUNCTION_VER(name, ver);                                         \
+    name##_type ptr = (::__interception::real_##name);                         \
+    if ((!ptr || !REAL(name)))                                                 \
       VReport(                                                                 \
           1, "AddressSanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
   } while (0)
diff --git a/compiler-rt/lib/interception/interception_linux.h b/compiler-rt/lib/interception/interception_linux.h
index 4c60bd8..abef9c9 100644
--- a/compiler-rt/lib/interception/interception_linux.h
+++ b/compiler-rt/lib/interception/interception_linux.h
@@ -30,16 +30,18 @@ void *GetFuncAddrVer(const char *name, const char *ver);
 }  // namespace __interception
 
 #define INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)                          \
-  ::__interception::GetRealFunctionAddress(                                \
+  do { ::__interception::GetRealFunctionAddress(                           \
       #func, (::__interception::uptr *)&__interception::PTR_TO_REAL(func), \
       (::__interception::uptr) & (func),                                   \
-      (::__interception::uptr) & WRAP(func))
+      (::__interception::uptr) & WRAP(func));                              \
+  } while (0)  // TODO(yln): temporarily make macro void.
 
 // Android,  Solaris and OpenBSD do not have dlvsym
 #if !SANITIZER_ANDROID && !SANITIZER_SOLARIS && !SANITIZER_OPENBSD
 #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
-  (::__interception::real_##func = (func##_type)(                \
-       unsigned long)::__interception::GetFuncAddrVer(#func, symver))
+  do { (::__interception::real_##func = (func##_type)(                \
+       unsigned long)::__interception::GetFuncAddrVer(#func, symver)); \
+  } while (0)
 #else
 #define INTERCEPT_FUNCTION_VER_LINUX_OR_FREEBSD(func, symver) \
   INTERCEPT_FUNCTION_LINUX_OR_FREEBSD(func)
diff --git a/compiler-rt/lib/msan/msan_interceptors.cc b/compiler-rt/lib/msan/msan_interceptors.cc
index f512080..0512d70 100644
--- a/compiler-rt/lib/msan/msan_interceptors.cc
+++ b/compiler-rt/lib/msan/msan_interceptors.cc
@@ -1243,13 +1243,17 @@ int OnExit() {
 
 #define MSAN_INTERCEPT_FUNC(name)                                       \
   do {                                                                  \
-    if ((!INTERCEPT_FUNCTION(name) || !REAL(name)))                     \
+    INTERCEPT_FUNCTION(name);                                           \
+    bool same = (& (name) == & WRAP(name));                             \
+    if ((!same || !REAL(name)))                                         \
       VReport(1, "MemorySanitizer: failed to intercept '" #name "'\n"); \
   } while (0)
 
 #define MSAN_INTERCEPT_FUNC_VER(name, ver)                                    \
   do {                                                                        \
-    if ((!INTERCEPT_FUNCTION_VER(name, ver) || !REAL(name)))                  \
+    INTERCEPT_FUNCTION_VER(name, ver);                                        \
+    name##_type ptr = (::__interception::real_##name);                        \
+    if ((!ptr || !REAL(name)))                                                \
       VReport(                                                                \
           1, "MemorySanitizer: failed to intercept '" #name "@@" #ver "'\n"); \
   } while (0)