Add experimental clang/driver flag -fsanitize-address-field-padding=N
Summary:
This change adds an experimental flag -fsanitize-address-field-padding=N (0, 1, 2)
to clang and driver. With this flag ASAN will be able to detect some cases of
intra-object-overflow bugs,
see https://code.google.com/p/address-sanitizer/wiki/IntraObjectOverflow
There is no actual functionality here yet, just the flag parsing.
The functionality is being reviewed at http://reviews.llvm.org/D5687
Test Plan: Build and run SPEC, LLVM Bootstrap, Chrome with this flag.
Reviewers: samsonov
Reviewed By: samsonov
Subscribers: cfe-commits
Differential Revision: http://reviews.llvm.org/D5676
llvm-svn: 219417
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 043141a..25d444e 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1628,6 +1628,9 @@
break;
}
}
+ // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
+ Opts.Sanitize.SanitizeAddressFieldPadding =
+ getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
}
static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,