[llvm-branch-commits] [libc] [libc][stdlib][annex_k] Add ignore_handler_s. (PR #164090)

[Muhammad Bassiouni via llvm-branch-commits]

https://github.com/bassiounix updated https://github.com/llvm/llvm-project/pull/164090

>From e1fd65cb2ac1cafff80bffe88ffd2b6a295afcfa Mon Sep 17 00:00:00 2001
From: bassiounix <muhammad.m.bassiouni at gmail.com>
Date: Tue, 14 Oct 2025 06:20:42 +0300
Subject: [PATCH] [libc][stdlib][annex_k] Add ignore_handler_s.

---
 libc/config/linux/aarch64/entrypoints.txt |  1 +
 libc/config/linux/riscv/entrypoints.txt   |  1 +
 libc/config/linux/x86_64/entrypoints.txt  |  3 ++-
 libc/include/CMakeLists.txt               |  1 +
 libc/include/stdlib.yaml                  |  9 +++++++++
 libc/src/stdlib/CMakeLists.txt            | 13 +++++++++++++
 libc/src/stdlib/ignore_handler_s.cpp      | 16 ++++++++++++++++
 libc/src/stdlib/ignore_handler_s.h        | 22 ++++++++++++++++++++++
 8 files changed, 65 insertions(+), 1 deletion(-)
 create mode 100644 libc/src/stdlib/ignore_handler_s.cpp
 create mode 100644 libc/src/stdlib/ignore_handler_s.h

diff --git a/libc/config/linux/aarch64/entrypoints.txt b/libc/config/linux/aarch64/entrypoints.txt
index 91be2d1f535e0..ddee4a6a502f8 100644
--- a/libc/config/linux/aarch64/entrypoints.txt
+++ b/libc/config/linux/aarch64/entrypoints.txt
@@ -1114,6 +1114,7 @@ if(LLVM_LIBC_FULL_BUILD)
     libc.src.stdlib.atexit
     libc.src.stdlib.exit
     libc.src.stdlib.getenv
+    libc.src.stdlib.ignore_handler_s
     libc.src.stdlib.quick_exit
 
     # signal.h entrypoints
diff --git a/libc/config/linux/riscv/entrypoints.txt b/libc/config/linux/riscv/entrypoints.txt
index 0e56884e8c065..8c0d3f971a568 100644
--- a/libc/config/linux/riscv/entrypoints.txt
+++ b/libc/config/linux/riscv/entrypoints.txt
@@ -1243,6 +1243,7 @@ if(LLVM_LIBC_FULL_BUILD)
     libc.src.stdlib.atexit
     libc.src.stdlib.exit
     libc.src.stdlib.getenv
+    libc.src.stdlib.ignore_handler_s
     libc.src.stdlib.quick_exit
 
     # signal.h entrypoints
diff --git a/libc/config/linux/x86_64/entrypoints.txt b/libc/config/linux/x86_64/entrypoints.txt
index 3a5d1a1457ab1..1cfd1fc478c24 100644
--- a/libc/config/linux/x86_64/entrypoints.txt
+++ b/libc/config/linux/x86_64/entrypoints.txt
@@ -1301,6 +1301,7 @@ if(LLVM_LIBC_FULL_BUILD)
     libc.src.stdlib.atexit
     libc.src.stdlib.exit
     libc.src.stdlib.getenv
+    libc.src.stdlib.ignore_handler_s
     libc.src.stdlib.mbstowcs
     libc.src.stdlib.mbtowc
     libc.src.stdlib.quick_exit
@@ -1439,7 +1440,7 @@ if(LLVM_LIBC_FULL_BUILD)
     libc.src.wchar.wcsnrtombs
 
     # nl_types.h entrypoints
-    libc.src.nl_types.catopen 
+    libc.src.nl_types.catopen
     libc.src.nl_types.catclose
     libc.src.nl_types.catgets
   )
diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
index 41d541f475290..89378a6ebc47d 100644
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -400,6 +400,7 @@ add_header_macro(
   ../libc/include/stdlib.yaml
   stdlib.h
   DEPENDS
+    .llvm-libc-macros.annex_k_macros
     .llvm-libc-macros.null_macro
     .llvm-libc-macros.stdlib_macros
     .llvm-libc-types.__atexithandler_t
diff --git a/libc/include/stdlib.yaml b/libc/include/stdlib.yaml
index 80cb8abdf82e5..7dce8646d6111 100644
--- a/libc/include/stdlib.yaml
+++ b/libc/include/stdlib.yaml
@@ -118,6 +118,15 @@ functions:
     return_type: char *
     arguments:
       - type: const char *
+  - name: ignore_handler_s
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: const char *__restrict
+      - type: void *__restrict
+      - type: errno_t
+    guard: 'LIBC_HAS_ANNEX_K'
   - name: labs
     standards:
       - stdc
diff --git a/libc/src/stdlib/CMakeLists.txt b/libc/src/stdlib/CMakeLists.txt
index 1ff5fe35a5719..8c1377d36146b 100644
--- a/libc/src/stdlib/CMakeLists.txt
+++ b/libc/src/stdlib/CMakeLists.txt
@@ -747,3 +747,16 @@ add_entrypoint_object(
   DEPENDS
     .${LIBC_TARGET_OS}.system
 )
+
+add_entrypoint_object(
+  ignore_handler_s
+  HDRS
+    ignore_handler_s.h
+  SRCS
+    ignore_handler_s.cpp
+  DEPENDS
+    libc.hdr.types.errno_t
+    libc.src.__support.libc_errno
+    libc.src.__support.macros.config
+    libc.src.__support.macros.attributes
+)
diff --git a/libc/src/stdlib/ignore_handler_s.cpp b/libc/src/stdlib/ignore_handler_s.cpp
new file mode 100644
index 0000000000000..172b1bcdb7b30
--- /dev/null
+++ b/libc/src/stdlib/ignore_handler_s.cpp
@@ -0,0 +1,16 @@
+//===-- Implementation header for ignore_handler_s --------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "src/stdlib/ignore_handler_s.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+LLVM_LIBC_FUNCTION(void, ignore_handler_s,
+                   (const char *__restrict, void *__restrict, errno_t)) {}
+
+} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/stdlib/ignore_handler_s.h b/libc/src/stdlib/ignore_handler_s.h
new file mode 100644
index 0000000000000..07328d4be01ce
--- /dev/null
+++ b/libc/src/stdlib/ignore_handler_s.h
@@ -0,0 +1,22 @@
+//===-- Implementation header for ignore_handler_s --------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_STDLIB_IGNORE_HANDLER_S_H
+#define LLVM_LIBC_SRC_STDLIB_IGNORE_HANDLER_S_H
+
+#include "hdr/types/errno_t.h"
+#include "src/__support/common.h"
+
+namespace LIBC_NAMESPACE_DECL {
+
+void ignore_handler_s(const char *__restrict msg, void *__restrict ptr,
+                      errno_t error);
+
+} // namespace LIBC_NAMESPACE_DECL
+
+#endif // LLVM_LIBC_SRC_STDLIB_IGNORE_HANDLER_S_H