* Re: [r14-1805 Regression] FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 45) on Linux/x86_64
2023-06-15 0:50 ` [r14-1805 Regression] FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 45) on Linux/x86_64 haochen.jiang
@ 2023-06-15 7:23 ` Thomas Schwinge
0 siblings, 0 replies; 2+ messages in thread
From: Thomas Schwinge @ 2023-06-15 7:23 UTC (permalink / raw)
To: gcc-patches
Cc: gcc-regression, haochen.jiang, Rainer Orth, Mike Stump, Martin Sebor
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Hi!
On 2023-06-15T08:50:59+0800, "haochen.jiang via Gcc-patches" <gcc-patches@gcc.gnu.org> wrote:
> On Linux/x86_64,
Actually: generally...
> 9c03391ba447ff86038d6a34c90ae737c3915b5f is the first bad commit
> commit 9c03391ba447ff86038d6a34c90ae737c3915b5f
> Author: Thomas Schwinge <thomas@codesourcery.com>
> Date: Wed Jun 7 16:24:26 2023 +0200
>
> Tighten 'dg-warning' alternatives in 'c-c++-common/Wfree-nonheap-object{,-2,-3}.c'
>
> caused
>
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++14 (test for excess errors)
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++14 (test for warnings, line 45)
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++17 (test for excess errors)
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++17 (test for warnings, line 45)
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++20 (test for excess errors)
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++20 (test for warnings, line 45)
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for excess errors)
> FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 45)
Indeed. Sorry -- not sure how that escaped my testing. I already did
have the fix in a different Git commit (but not in my testing build).
Pushed to master branch commit df071fbd467f0cb3711119ef41d74792fc5e6c8c
"Fix 'dg-warning' in 'c-c++-common/Wfree-nonheap-object-3.c' for C++",
see attached.
Grüße
Thomas
> with GCC configured with
>
> ../../gcc/configure --prefix=/export/users/haochenj/src/gcc-bisect/master/master/r14-1805/usr --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl --enable-libmpx x86_64-linux --disable-bootstrap
>
> To reproduce:
>
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=c-c++-common/Wfree-nonheap-object-3.c --target_board='unix{-m32}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=c-c++-common/Wfree-nonheap-object-3.c --target_board='unix{-m32\ -march=cascadelake}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=c-c++-common/Wfree-nonheap-object-3.c --target_board='unix{-m64}'"
> $ cd {build_dir}/gcc && make check RUNTESTFLAGS="dg.exp=c-c++-common/Wfree-nonheap-object-3.c --target_board='unix{-m64\ -march=cascadelake}'"
>
> (Please do not reply to this email, for question about this report, contact me at haochen dot jiang at intel.com)
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From df071fbd467f0cb3711119ef41d74792fc5e6c8c Mon Sep 17 00:00:00 2001
From: Thomas Schwinge <thomas@codesourcery.com>
Date: Wed, 7 Jun 2023 17:12:01 +0200
Subject: [PATCH] Fix 'dg-warning' in 'c-c++-common/Wfree-nonheap-object-3.c'
for C++
[...]/c-c++-common/Wfree-nonheap-object-3.c:57:24: warning: 'malloc (dealloc_float)' attribute ignored with deallocation functions declared 'inline' [-Wattributes]
[...]/c-c++-common/Wfree-nonheap-object-3.c:51:1: note: deallocation function declared here
[...]/c-c++-common/Wfree-nonheap-object-3.c: In function 'void test_nowarn_int(int)':
[...]/c-c++-common/Wfree-nonheap-object-3.c:25:20: warning: 'void __builtin_free(void*)' called on pointer 'p' with nonzero offset 4 [-Wfree-nonheap-object]
[...]/c-c++-common/Wfree-nonheap-object-3.c:24:24: note: returned from 'int* alloc_int(int)'
[...]/c-c++-common/Wfree-nonheap-object-3.c: In function 'void test_nowarn_long(int)':
[...]/c-c++-common/Wfree-nonheap-object-3.c:45:18: warning: 'void dealloc_long(long int*)' called on pointer '<unknown>' with nonzero offset 8 [-Wfree-nonheap-object]
[...]/c-c++-common/Wfree-nonheap-object-3.c:44:26: note: returned from 'long int* alloc_long(int)'
In function 'void dealloc_float(float*)',
inlined from 'void test_nowarn_float(int)' at [...]/c-c++-common/Wfree-nonheap-object-3.c:68:19:
[...]/c-c++-common/Wfree-nonheap-object-3.c:53:18: warning: 'void __builtin_free(void*)' called on pointer '<unknown>' with nonzero offset 8 [-Wfree-nonheap-object]
[...]/c-c++-common/Wfree-nonheap-object-3.c: In function 'void test_nowarn_float(int)':
[...]/c-c++-common/Wfree-nonheap-object-3.c:67:28: note: returned from 'float* alloc_float(int)'
PASS: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 25)
FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 45)
PASS: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 51)
PASS: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 53)
PASS: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for warnings, line 57)
FAIL: c-c++-common/Wfree-nonheap-object-3.c -std=gnu++98 (test for excess errors)
Excess errors:
[...]/c-c++-common/Wfree-nonheap-object-3.c:45:18: warning: 'void dealloc_long(long int*)' called on pointer '<unknown>' with nonzero offset 8 [-Wfree-nonheap-object]
..., that is: decorated 'void dealloc_long(long int*)' instead of plain
'dealloc_long' -- similar to how all the other 'dg-warning's allow for the
decorated function signature in addition to the plain one.
This issue was latent since the test case was added in
commit fe7f75cf16783589eedbab597e6d0b8d35d7e470
"Correct/improve maybe_emit_free_warning (PR middle-end/98166, PR c++/57111, PR middle-end/98160)",
and was finally exposed by my recent
commit 9c03391ba447ff86038d6a34c90ae737c3915b5f
"Tighten 'dg-warning' alternatives in 'c-c++-common/Wfree-nonheap-object{,-2,-3}.c'".
gcc/testsuite/
* c-c++-common/Wfree-nonheap-object-3.c: Fix 'dg-warning' for C++.
---
gcc/testsuite/c-c++-common/Wfree-nonheap-object-3.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gcc/testsuite/c-c++-common/Wfree-nonheap-object-3.c b/gcc/testsuite/c-c++-common/Wfree-nonheap-object-3.c
index 8f20de8455fa..23d89a31454e 100644
--- a/gcc/testsuite/c-c++-common/Wfree-nonheap-object-3.c
+++ b/gcc/testsuite/c-c++-common/Wfree-nonheap-object-3.c
@@ -42,7 +42,7 @@ void test_nowarn_long (int n)
{
long *p = alloc_long (n);
- dealloc_long (p + 1); // { dg-warning "'dealloc_long' called on pointer '(p|<unknown>)' with nonzero offset" }
+ dealloc_long (p + 1); // { dg-warning "'(dealloc_long|void dealloc_long\\(long int\\*\\))' called on pointer '(p|<unknown>)' with nonzero offset" }
}
}
--
2.39.2
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