Add top-level Clang flag -f(no-)sanitize-address-zero-base-shadow that makes AddressSanitizer use bottom of the address space for the shadow memory. On Linux it can be used with -fPIE/-pie to improve performance.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172974 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Frontend/CompilerInvocation.cpp b/lib/Frontend/CompilerInvocation.cpp
index 9329b3b..a16b822 100644
--- a/lib/Frontend/CompilerInvocation.cpp
+++ b/lib/Frontend/CompilerInvocation.cpp
@@ -404,8 +404,10 @@
Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
- Opts.MemorySanitizerTrackOrigins =
+ Opts.SanitizeMemoryTrackOrigins =
Args.hasArg(OPT_fsanitize_memory_track_origins);
+ Opts.SanitizeAddressZeroBaseShadow =
+ Args.hasArg(OPT_fsanitize_address_zero_base_shadow);
Opts.SSPBufferSize =
Args.getLastArgIntValue(OPT_stack_protector_buffer_size, 8, Diags);
Opts.StackRealignment = Args.hasArg(OPT_mstackrealign);