From 6d2b6f0a5f88cc27ee6d5e2d2744dee2a40bb457 Mon Sep 17 00:00:00 2001 From: Evgeniy Stepanov Date: Tue, 29 Aug 2017 20:03:51 +0000 Subject: Minimal runtime for UBSan. Summary: An implementation of ubsan runtime library suitable for use in production. Minimal attack surface. * No stack traces. * Definitely no C++ demangling. * No UBSAN_OPTIONS=log_file=/path (very suid-unfriendly). And no UBSAN_OPTIONS in general. * as simple as possible Minimal CPU and RAM overhead. * Source locations unnecessary in the presence of (split) debug info. * Values and types (as in A+B overflows T) can be reconstructed from register/stack dumps, once you know what type of error you are looking at. * above two items save 3% binary size. When UBSan is used with -ftrap-function=abort, sometimes it is hard to reason about failures. This library replaces abort with a slightly more informative message without much extra overhead. Since ubsan interface in not stable, this code must reside in compiler-rt. Reviewers: pcc, kcc Subscribers: srhines, mgorny, aprantl, krytarowski, llvm-commits Differential Revision: https://reviews.llvm.org/D36810 llvm-svn: 312029 --- clang/lib/Frontend/CompilerInvocation.cpp | 1 + 1 file changed, 1 insertion(+) (limited to 'clang/lib/Frontend/CompilerInvocation.cpp') diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp index abf6b0b302f..2cc93c1f13d 100644 --- a/clang/lib/Frontend/CompilerInvocation.cpp +++ b/clang/lib/Frontend/CompilerInvocation.cpp @@ -830,6 +830,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK, getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags); Opts.SanitizeMemoryUseAfterDtor = Args.hasArg(OPT_fsanitize_memory_use_after_dtor); + Opts.SanitizeMinimalRuntime = Args.hasArg(OPT_fsanitize_minimal_runtime); Opts.SanitizeCfiCrossDso = Args.hasArg(OPT_fsanitize_cfi_cross_dso); Opts.SanitizeStats = Args.hasArg(OPT_fsanitize_stats); if (Arg *A = Args.getLastArg(OPT_fsanitize_address_use_after_scope, -- cgit v1.2.3