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* [Bug tdep/27007] New: [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures
@ 2020-12-03 12:21 vries at gcc dot gnu.org
2020-12-03 12:21 ` [Bug tdep/27007] " vries at gcc dot gnu.org
` (4 more replies)
0 siblings, 5 replies; 6+ messages in thread
From: vries at gcc dot gnu.org @ 2020-12-03 12:21 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=27007
Bug ID: 27007
Summary: [-m32] FAIL: gdb.cp/many-args.exp: check passing many
structures
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: tdep
Assignee: unassigned at sourceware dot org
Reporter: vries at gcc dot gnu.org
Target Milestone: ---
In more detail:
...
(gdb) PASS: gdb.cp/many-args.exp: continue to breakpoint: break-here
p check_val (ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val,
ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val,
ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val,
ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val,
ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val, ref_val,
ref_val)^M
$1 = false^M
(gdb) FAIL: gdb.cp/many-args.exp: check passing many structures
...
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* [Bug tdep/27007] [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures
2020-12-03 12:21 [Bug tdep/27007] New: [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures vries at gcc dot gnu.org
@ 2020-12-03 12:21 ` vries at gcc dot gnu.org
2020-12-03 12:40 ` vries at gcc dot gnu.org
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: vries at gcc dot gnu.org @ 2020-12-03 12:21 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=27007
--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Minimal version:
...
$ cat gdb/testsuite/gdb.cp/many-args.cc
typedef int v4si __attribute__ ((vector_size (16)));
struct ss
{
static v4si static_field;
unsigned char aa;
};
bool
check_val (ss v1, ss v2)
{
return (v1.aa == 'a' && v2.aa == 'a');
}
int
main (void)
{
ss ref_val = { 'a' };
bool flag = check_val (ref_val, ref_val);
return (flag ? 0 : 1); /* break-here */
}
$ gcc -g gdb/testsuite/gdb.cp/many-args.cc -m32
$ ./a.out; echo $?
0
$ gdb -batch a.out -ex start -ex n -ex n -ex "p check_val (ref_val, ref_val)"
Temporary breakpoint 1 at 0x804842d: file gdb/testsuite/gdb.cp/many-args.cc,
line 18.
Temporary breakpoint 1, main () at gdb/testsuite/gdb.cp/many-args.cc:18
18 ss ref_val = { 'a' };
19 bool flag = check_val (ref_val, ref_val);
20 return (flag ? 0 : 1); /* break-here */
$1 = false
...
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* [Bug tdep/27007] [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures
2020-12-03 12:21 [Bug tdep/27007] New: [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures vries at gcc dot gnu.org
2020-12-03 12:21 ` [Bug tdep/27007] " vries at gcc dot gnu.org
@ 2020-12-03 12:40 ` vries at gcc dot gnu.org
2020-12-03 12:44 ` vries at gcc dot gnu.org
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: vries at gcc dot gnu.org @ 2020-12-03 12:40 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=27007
--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
Hmm, i386_16_byte_align_p triggers on the static field.
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* [Bug tdep/27007] [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures
2020-12-03 12:21 [Bug tdep/27007] New: [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures vries at gcc dot gnu.org
2020-12-03 12:21 ` [Bug tdep/27007] " vries at gcc dot gnu.org
2020-12-03 12:40 ` vries at gcc dot gnu.org
@ 2020-12-03 12:44 ` vries at gcc dot gnu.org
2020-12-04 12:37 ` cvs-commit at gcc dot gnu.org
2020-12-04 12:39 ` vries at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: vries at gcc dot gnu.org @ 2020-12-03 12:44 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=27007
--- Comment #3 from Tom de Vries <vries at gcc dot gnu.org> ---
Tentative patch:
...
diff --git a/gdb/i386-tdep.c b/gdb/i386-tdep.c
index 8b07ca67b5..6223066ce0 100644
--- a/gdb/i386-tdep.c
+++ b/gdb/i386-tdep.c
@@ -2666,6 +2666,8 @@ i386_16_byte_align_p (struct type *type)
int i;
for (i = 0; i < type->num_fields (); i++)
{
+ if (field_is_static (&type->field (i)))
+ continue;
if (i386_16_byte_align_p (type->field (i).type ()))
return 1;
}
...
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* [Bug tdep/27007] [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures
2020-12-03 12:21 [Bug tdep/27007] New: [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures vries at gcc dot gnu.org
` (2 preceding siblings ...)
2020-12-03 12:44 ` vries at gcc dot gnu.org
@ 2020-12-04 12:37 ` cvs-commit at gcc dot gnu.org
2020-12-04 12:39 ` vries at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: cvs-commit at gcc dot gnu.org @ 2020-12-04 12:37 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=27007
--- Comment #4 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom de Vries <vries@sourceware.org>:
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=b6a6aa07c5bd53d19c33db1f7c9645fc99b66e1b
commit b6a6aa07c5bd53d19c33db1f7c9645fc99b66e1b
Author: Tom de Vries <tdevries@suse.de>
Date: Fri Dec 4 13:36:48 2020 +0100
[gdb/tdep] Handle static field in i386_16_byte_align_p
When running test-case on gdb.cp/many-args.exp with target board unix/-m32,
I
run into:
...
(gdb) p check_val (ref_val, ref_val, ... , ref_val, ref_val)^M
$1 = false^M
(gdb) FAIL: gdb.cp/many-args.exp: check passing many structures
...
The test source contains struct ss:
...
typedef int v4si __attribute__ ((vector_size (16)));
struct ss
{
static v4si static_field;
unsigned char aa;
};
...
and i386_16_byte_align_p returns true for this type.
Fix this by skipping static fields in i386_16_byte_align_p.
Tested on x86_64-linux.
gdb/ChangeLog:
2020-12-04 Tom de Vries <tdevries@suse.de>
PR tdep/27007
* i386-tdep.c (i386_16_byte_align_p): Skip static fields.
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* [Bug tdep/27007] [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures
2020-12-03 12:21 [Bug tdep/27007] New: [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures vries at gcc dot gnu.org
` (3 preceding siblings ...)
2020-12-04 12:37 ` cvs-commit at gcc dot gnu.org
@ 2020-12-04 12:39 ` vries at gcc dot gnu.org
4 siblings, 0 replies; 6+ messages in thread
From: vries at gcc dot gnu.org @ 2020-12-04 12:39 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=27007
Tom de Vries <vries at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |11.1
Status|NEW |RESOLVED
Resolution|--- |FIXED
--- Comment #5 from Tom de Vries <vries at gcc dot gnu.org> ---
Patch with fix committed.
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2020-12-03 12:21 [Bug tdep/27007] New: [-m32] FAIL: gdb.cp/many-args.exp: check passing many structures vries at gcc dot gnu.org
2020-12-03 12:21 ` [Bug tdep/27007] " vries at gcc dot gnu.org
2020-12-03 12:40 ` vries at gcc dot gnu.org
2020-12-03 12:44 ` vries at gcc dot gnu.org
2020-12-04 12:37 ` cvs-commit at gcc dot gnu.org
2020-12-04 12:39 ` vries at gcc dot gnu.org
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