[PATCH] D54905: [AddressSanitizer] Add flag to disable linking with CXX runtime

[Eugene Leviant via Phabricator via cfe-commits]

evgeny777 created this revision.
evgeny777 added reviewers: kcc, samsonov.

This prevents link errors when operators new/delete are overridden by application.


https://reviews.llvm.org/D54905

Files:
  include/clang/Driver/Options.td
  lib/Driver/SanitizerArgs.cpp
  test/Driver/sanitizer-ld.c


Index: test/Driver/sanitizer-ld.c
===================================================================
--- test/Driver/sanitizer-ld.c
+++ test/Driver/sanitizer-ld.c
@@ -115,6 +115,12 @@
 // CHECK-ASAN-LINUX-CXX-STATIC: "--whole-archive" "{{.*}}libclang_rt.asan-i386.a" "--no-whole-archive"
 // CHECK-ASAN-LINUX-CXX-STATIC: stdc++
 
+// RUN: %clangxx -x c++ %s -### -o /dev/null -fsanitize=address -fno-sanitize-link-c++-runtime \
+// RUN:     -target i386-unknown-linux -fuse-ld=ld 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-ASAN-NO-LINK-CXX-RUNTIME %s
+//
+// CHECK-ASAN-NO-LINK-CXX-RUNTIME-NOT: asan_cxx
+
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target arm-linux-gnueabi -fuse-ld=ld -fsanitize=address \
 // RUN:     --sysroot=%S/Inputs/basic_android_tree/sysroot \
Index: lib/Driver/SanitizerArgs.cpp
===================================================================
--- lib/Driver/SanitizerArgs.cpp
+++ lib/Driver/SanitizerArgs.cpp
@@ -743,7 +743,8 @@
 
   // Parse -link-cxx-sanitizer flag.
   LinkCXXRuntimes =
-      Args.hasArg(options::OPT_fsanitize_link_cxx_runtime) || D.CCCIsCXX();
+      Args.hasFlag(options::OPT_fsanitize_link_cxx_runtime,
+                   options::OPT_fno_sanitize_link_cxx_runtime, D.CCCIsCXX());
 
   // Finally, initialize the set of available and recoverable sanitizers.
   Sanitizers.Mask |= Kinds;
Index: include/clang/Driver/Options.td
===================================================================
--- include/clang/Driver/Options.td
+++ include/clang/Driver/Options.td
@@ -1015,6 +1015,8 @@
                                         Group<f_clang_Group>;
 def fsanitize_link_cxx_runtime : Flag<["-"], "fsanitize-link-c++-runtime">,
                                  Group<f_clang_Group>;
+def fno_sanitize_link_cxx_runtime : Flag<["-"], "fno-sanitize-link-c++-runtime">,
+                                 Group<f_clang_Group>;
 def fsanitize_cfi_cross_dso : Flag<["-"], "fsanitize-cfi-cross-dso">,
                               Group<f_clang_Group>,
                               HelpText<"Enable control flow integrity (CFI) checks for cross-DSO calls.">;


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