https://github.com/tru updated https://github.com/llvm/llvm-project/pull/151921
>From 16bd92cdca5e0f29e109898e53bd71c31ce7593b Mon Sep 17 00:00:00 2001
From: Konstantin Varlamov <varcons...@gmail.com>
Date: Thu, 31 Jul 2025 02:52:17 -0700
Subject: [PATCH] [libc++][hardening] Add a greppable prefix to assertion
messages. (#150560)
The current assertion failure messages produced by Hardening are not
very grep-friendly (the common part is rarther generic and requires
wildcards to match). While it's possible to use `__FILE__` for grepping,
it's easier and more straighforward to simply add a libc++-specific
prefix; this is especially important for the planned `observe` mode that
might produce many assertion failure messages over the course of the
program's execution that later need to be filtered and examined.
(cherry picked from commit 4ef92469ab341ac1bee39a9413ffaa845e307414)
---
libcxx/include/__assert | 4 ++--
libcxx/test/support/check_assertion.h | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/libcxx/include/__assert b/libcxx/include/__assert
index 90eaa6023587b..a9451daf47f2f 100644
--- a/libcxx/include/__assert
+++ b/libcxx/include/__assert
@@ -20,8 +20,8 @@
#define _LIBCPP_ASSERT(expression, message)
\
(__builtin_expect(static_cast<bool>(expression), 1)
\
? (void)0
\
- : _LIBCPP_ASSERTION_HANDLER(__FILE__ ":" _LIBCPP_TOSTRING(__LINE__) ":
assertion " _LIBCPP_TOSTRING( \
- expression) " failed: " message "\n"))
+ : _LIBCPP_ASSERTION_HANDLER(__FILE__ ":" _LIBCPP_TOSTRING(
\
+ __LINE__) ": libc++ Hardening assertion "
_LIBCPP_TOSTRING(expression) " failed: " message "\n"))
// WARNING: __builtin_assume can currently inhibit optimizations. Only add
assumptions with a clear
// optimization intent. See
https://discourse.llvm.org/t/llvm-assume-blocks-optimization/71609 for a
diff --git a/libcxx/test/support/check_assertion.h
b/libcxx/test/support/check_assertion.h
index a091043195345..8416de76cfd61 100644
--- a/libcxx/test/support/check_assertion.h
+++ b/libcxx/test/support/check_assertion.h
@@ -52,8 +52,8 @@ MatchResult MatchAssertionMessage(const std::string& text,
std::string_view expe
// library.
std::string assertion_format_string = [&] {
if (use_marker)
- return (".*###\\n(.*):(\\d+): assertion (.*) failed: (.*)\\n###");
- return ("(.*):(\\d+): assertion (.*) failed: (.*)\\n");
+ return (".*###\\n(.*):(\\d+): libc\\+\\+ Hardening assertion (.*)
failed: (.*)\\n###");
+ return ("(.*):(\\d+): libc\\+\\+ Hardening assertion (.*) failed:
(.*)\\n");
}();
std::regex assertion_format(assertion_format_string);
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