1 # Copyright 2015 The Chromium Authors. All rights reserved.
2 # Use of this source code is governed by a BSD-style license that can be
3 # found in the LICENSE file.
6 # Compile for Address Sanitizer to find memory bugs.
9 # Compile for Leak Sanitizer to find leaks.
12 # Compile for Memory Sanitizer to find uninitialized reads.
15 # Compile for Thread Sanitizer to find threading bugs.
18 # Use libc++ (buildtools/third_party/libc++ and
19 # buildtools/third_party/libc++abi) instead of stdlibc++ as standard library.
20 # This is intended to be used for instrumented builds.
21 use_custom_libcxx = (is_asan && is_linux) || is_tsan || is_msan
23 # Track where uninitialized memory originates from. From fastest to slowest:
24 # 0 - no tracking, 1 - track only the initial allocation site, 2 - track the
25 # chain of stores leading from allocation site to use site.
26 msan_track_origins = 2
28 # Use dynamic libraries instrumented by one of the sanitizers instead of the
29 # standard system libraries. Set this flag to download prebuilt binaries from
31 use_prebuilt_instrumented_libraries = false
33 # Enable building with SyzyAsan which can find certain types of memory
34 # errors. Only works on Windows. See
35 # https://code.google.com/p/sawbuck/wiki/SyzyASanHowTo
38 # Compile with Control Flow Integrity to protect virtual calls and casts.
39 # See http://clang.llvm.org/docs/ControlFlowIntegrity.html
42 # By default, Control Flow Integrity will crash the program if it detects a
43 # violation. Set this to true to print detailed diagnostics instead.
47 # TODO(GYP) bug 527515: is_ubsan, is_ubsan_vptr
48 using_sanitizer = is_asan || is_lsan || is_tsan || is_msan
50 assert(!using_sanitizer || is_clang,
51 "Sanitizers (is_*san) require setting is_clang = true in 'gn args'")
53 # MSan only links Chrome properly in release builds (brettw -- 9/1/2015). The
54 # same is possibly true for the other non-ASan sanitizers. But regardless of
55 # whether it links, one would normally never run a sanitizer in debug mode.
56 # Running in debug mode probably indicates you forgot to set the "is_debug =
57 # false" flag in the build args. ASan seems to run fine in debug mode.
59 # If you find a use-case where you want to compile a sanitizer in debug mode
60 # and have verified it works, ask brettw and we can consider removing it from
61 # this condition. We may also be able to find another way to enable your case
62 # without having people accidentally get broken builds by compiling an
63 # unsupported or unadvisable configurations.
65 # For one-off testing, just comment this assertion out.
66 assert(!is_debug || !(is_msan || is_lsan || is_tsan),
67 "Sanitizers should generally be used in release (set is_debug=false).")