re PR sanitizer/78307 (missing symbols in libubsan without changing the soname)

	PR sanitizer/78307
	* ubsan/ubsan_handlers.cc (__ubsan_handle_cfi_bad_icall): New function.
	( __ubsan_handle_cfi_bad_icall_abort): Likewise. 
	* ubsan/ubsan_handlers.h (struct CFIBadIcallData): New type.
	* ubsan/ubsan_handlers_cxx.cc (__ubsan_handle_cfi_bad_type): New
	function.
	(__ubsan_handle_cfi_bad_type_abort): Likewise.
	* ubsan/ubsan_handlers_cxx.h (struct CFIBadTypeData): New type.
	(__ubsan_handle_cfi_bad_type): Export function.
	(__ubsan_handle_cfi_bad_type_abort): Likewise.
	* HOWTO_MERGE: Update documentation.

From-SVN: r242478

6 files changed, 71 insertions, 1 deletions

diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog
index a9a8810..f8a0fcd 100644
--- a/libsanitizer/ChangeLog
+++ b/libsanitizer/ChangeLog
@@ -1,3 +1,17 @@
+2016-11-16  Maxim Ostapenko  <m.ostapenko@samsung.com>
+
+	PR sanitizer/78307
+	* ubsan/ubsan_handlers.cc (__ubsan_handle_cfi_bad_icall): New function.
+	( __ubsan_handle_cfi_bad_icall_abort): Likewise. 
+	* ubsan/ubsan_handlers.h (struct CFIBadIcallData): New type.
+	* ubsan/ubsan_handlers_cxx.cc (__ubsan_handle_cfi_bad_type): New
+	function.
+	(__ubsan_handle_cfi_bad_type_abort): Likewise.
+	* ubsan/ubsan_handlers_cxx.h (struct CFIBadTypeData): New type.
+	(__ubsan_handle_cfi_bad_type): Export function.
+	(__ubsan_handle_cfi_bad_type_abort): Likewise.
+	* HOWTO_MERGE: Update documentation.
+
 2016-11-15  Matthias Klose  <doko@ubuntu.com>
 
 	* configure: Regenerate.
diff --git a/libsanitizer/HOWTO_MERGE b/libsanitizer/HOWTO_MERGE
index d0eca40..81121aa 100644
--- a/libsanitizer/HOWTO_MERGE
+++ b/libsanitizer/HOWTO_MERGE
@@ -11,7 +11,8 @@ general list of actions required to perform the merge:
   in corresponding CMakeLists.txt and config-ix.cmake files from compiler-rt source
   directory.
 * Apply all needed GCC-specific patches to libsanitizer (note that some of
-  them might be already included to upstream).
+  them might be already included to upstream).  The list of these patches is stored
+  into LOCAL_PATCHES file.
 * Apply all necessary compiler changes.  Be especially careful here, you must
   not break ABI between compiler and library.  You can reveal these changes by
   inspecting the history of AddressSanitizer.cpp and ThreadSanitizer.cpp files
@@ -37,3 +38,4 @@ general list of actions required to perform the merge:
   in libasan, configure/Makefile changes). The review process has O(N^2) complexity, so you
   would simplify and probably speed up the review process by doing this.
 * Send your patches for review to GCC Patches Mailing List (gcc-patches@gcc.gnu.org).
+* Update LOCAL_PATCHES file when you've committed the whole patch set with new revisions numbers.
diff --git a/libsanitizer/ubsan/ubsan_handlers.cc b/libsanitizer/ubsan/ubsan_handlers.cc
index 0e343d3..5631e45 100644
--- a/libsanitizer/ubsan/ubsan_handlers.cc
+++ b/libsanitizer/ubsan/ubsan_handlers.cc
@@ -558,6 +558,21 @@ static void HandleCFIBadType(CFICheckFailData *Data, ValueHandle Vtable,
 #endif
 }  // 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 ef741ca..394c9ea 100644
--- a/libsanitizer/ubsan/ubsan_handlers.h
+++ b/libsanitizer/ubsan/ubsan_handlers.h
@@ -156,12 +156,20 @@ enum CFITypeCheckKind : unsigned char {
   CFITCK_ICall,
 };
 
+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_handlers_cxx.cc b/libsanitizer/ubsan/ubsan_handlers_cxx.cc
index 015a9ff..007a1d6 100644
--- a/libsanitizer/ubsan/ubsan_handlers_cxx.cc
+++ b/libsanitizer/ubsan/ubsan_handlers_cxx.cc
@@ -142,4 +142,22 @@ void HandleCFIBadType(CFICheckFailData *Data, ValueHandle Vtable,
 }
 }  // namespace __ubsan
 
+void __ubsan::__ubsan_handle_cfi_bad_type(CFIBadTypeData *TypeData,
+                                          ValueHandle Vtable) {
+  GET_REPORT_OPTIONS(false);
+  CFITypeCheckKind TypeCheckKind
+    = static_cast<CFITypeCheckKind> (TypeData->TypeCheckKind);
+  CFICheckFailData Data = {TypeCheckKind, TypeData->Loc, TypeData->Type};
+  HandleCFIBadType(&Data, Vtable, false, Opts);
+}
+
+void __ubsan::__ubsan_handle_cfi_bad_type_abort(CFIBadTypeData *TypeData,
+                                                ValueHandle Vtable) {
+  GET_REPORT_OPTIONS(true);
+  CFITypeCheckKind TypeCheckKind
+    = static_cast<CFITypeCheckKind> (TypeData->TypeCheckKind);
+  CFICheckFailData Data = {TypeCheckKind, TypeData->Loc, TypeData->Type};
+  HandleCFIBadType(&Data, Vtable, false, Opts);
+}
+
 #endif // CAN_SANITIZE_UB
diff --git a/libsanitizer/ubsan/ubsan_handlers_cxx.h b/libsanitizer/ubsan/ubsan_handlers_cxx.h
index 3738235..6ace2b3 100644
--- a/libsanitizer/ubsan/ubsan_handlers_cxx.h
+++ b/libsanitizer/ubsan/ubsan_handlers_cxx.h
@@ -23,6 +23,12 @@ struct DynamicTypeCacheMissData {
   unsigned char TypeCheckKind;
 };
 
+struct CFIBadTypeData {
+  SourceLocation Loc;
+  const TypeDescriptor &Type;
+  unsigned char TypeCheckKind;
+};
+
 /// \brief Handle a runtime type check failure, caused by an incorrect vptr.
 /// When this handler is called, all we know is that the type was not in the
 /// cache; this does not necessarily imply the existence of a bug.
@@ -32,6 +38,13 @@ void __ubsan_handle_dynamic_type_cache_miss(
 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
 void __ubsan_handle_dynamic_type_cache_miss_abort(
   DynamicTypeCacheMissData *Data, ValueHandle Pointer, ValueHandle Hash);
+
+/// \brief Handle a control flow integrity check failure by printing a
+/// diagnostic.
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE void
+__ubsan_handle_cfi_bad_type(CFIBadTypeData *Data, ValueHandle Vtable);
+extern "C" SANITIZER_INTERFACE_ATTRIBUTE void
+__ubsan_handle_cfi_bad_type_abort(CFIBadTypeData *Data, ValueHandle Vtable);
 }
 
 #endif // UBSAN_HANDLERS_H