[glibc/azanella/clang] elf: Suppress unused function clang for __ifunc_resolver
Adhemerval Zanella
azanella@sourceware.org
Wed Aug 30 12:34:26 GMT 2023
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8b8dfbeabb6456486f7a6aae3989a6a38d6523cd
commit 8b8dfbeabb6456486f7a6aae3989a6a38d6523cd
Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Thu Aug 4 09:43:18 2022 -0300
elf: Suppress unused function clang for __ifunc_resolver
Diff:
---
elf/ifuncmain9.c | 4 ++++
elf/tst-ifunc-fault-lazy.c | 4 ++++
include/libc-symbols.h | 6 +++++-
3 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/elf/ifuncmain9.c b/elf/ifuncmain9.c
index cab26af75c..e37c391f02 100644
--- a/elf/ifuncmain9.c
+++ b/elf/ifuncmain9.c
@@ -22,6 +22,7 @@
# include <stdbool.h>
# include <stdio.h>
+# include <libc-diag.h>
/* Do not use the test framework, so that the process setup is not
disturbed. */
@@ -40,6 +41,8 @@ implementation (void)
return random_constant;
}
+DIAG_PUSH_NEEDS_COMMENT_CLANG;
+DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wunused-function");
static __typeof__ (implementation) *
inhibit_stack_protector
resolver (void)
@@ -47,6 +50,7 @@ resolver (void)
++resolver_called;
return implementation;
}
+DIAG_POP_NEEDS_COMMENT_CLANG;
static int magic (void) __attribute__ ((ifunc ("resolver")));
diff --git a/elf/tst-ifunc-fault-lazy.c b/elf/tst-ifunc-fault-lazy.c
index 33d60196da..57b0a28306 100644
--- a/elf/tst-ifunc-fault-lazy.c
+++ b/elf/tst-ifunc-fault-lazy.c
@@ -21,6 +21,7 @@
relocations. */
#include <config.h>
+#include <libc-diag.h>
#ifdef HAVE_GCC_IFUNC
@@ -34,6 +35,8 @@ implementation (void)
*p = 0;
}
+DIAG_PUSH_NEEDS_COMMENT_CLANG;
+DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wunused-function");
static __typeof__ (implementation) *
resolver (void)
{
@@ -42,6 +45,7 @@ resolver (void)
*p = 0;
return implementation;
}
+DIAG_POP_NEEDS_COMMENT_CLANG;
static void magic (void) __attribute__ ((ifunc ("resolver")));
diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 2184522c93..ad3b800ccd 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -86,6 +86,7 @@
/* Obtain the definition of symbol_version_reference. */
#include <libc-symver.h>
+#include <libc-diag.h>
/* When PIC is defined and SHARED isn't defined, we are building PIE
by default. */
@@ -683,7 +684,10 @@ for linking")
# define __ifunc(type_name, name, expr, arg, init) \
extern __typeof (type_name) name __attribute__ \
((ifunc (#name "_ifunc"))); \
- __ifunc_resolver (type_name, name, expr, arg, init, static)
+ DIAG_PUSH_NEEDS_COMMENT_CLANG; \
+ DIAG_IGNORE_NEEDS_COMMENT_CLANG (13, "-Wunused-function"); \
+ __ifunc_resolver (type_name, name, expr, arg, init, static); \
+ DIAG_POP_NEEDS_COMMENT_CLANG;
# define __ifunc_hidden(type_name, name, expr, arg, init) \
__ifunc (type_name, name, expr, arg, init)
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