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* [Bug mi/14607] New: -var-list-children reports wrong numchild count
@ 2012-09-22 9:19 niko.sams at gmail dot com
2012-09-22 9:21 ` [Bug mi/14607] " niko.sams at gmail dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: niko.sams at gmail dot com @ 2012-09-22 9:19 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=14607
Bug #: 14607
Summary: -var-list-children reports wrong numchild count
Product: gdb
Version: 7.5
Status: NEW
Severity: normal
Priority: P2
Component: mi
AssignedTo: unassigned@sourceware.org
ReportedBy: niko.sams@gmail.com
Classification: Unclassified
To reproduce see this example debug session:
cat main.cpp
#include <vector>
int main()
{
struct {
std::vector<int> a;
} struct1;
struct1.a.push_back(10);
struct1.a.push_back(100);
return 0;
}
gdb --interpreter=mi2 testdebugee
-enable-pretty-printing
break main.cpp:12
-exec-run
-var-create struct1 @ struct1
-var-list-children --all-values struct1
^done,numchild="1",children=[child={name="struct1.public",exp="public",numchild="1",value="",thread-id="1"}],has_more="0"
-var-list-children --all-values struct1.public
^done,numchild="1",children=[child={name="struct1.public.a",exp="a",numchild="0",value="{...}",type="std::vector<int,
std::allocator<int>
>",thread-id="1",displayhint="array",dynamic="1"}],has_more="0"
^^^^ should be "2"
#correct:
-var-list-children --all-values struct1.public.a
^done,numchild="2",displayhint="array",children=[child={name="struct1.public.a.[0]",exp="[0]",numchild="0",value="10",type="int",thread-id="1"},child={name="struct1.public.a.[1]",exp="[1]",numchild="0",value="100",type="int",thread-id="1"}],ha
#correct:
-var-info-num-children struct1.public.a
^done,numchild="2"
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* [Bug mi/14607] -var-list-children reports wrong numchild count
2012-09-22 9:19 [Bug mi/14607] New: -var-list-children reports wrong numchild count niko.sams at gmail dot com
@ 2012-09-22 9:21 ` niko.sams at gmail dot com
2012-09-22 9:24 ` niko.sams at gmail dot com
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: niko.sams at gmail dot com @ 2012-09-22 9:21 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=14607
--- Comment #1 from Niko Sams <niko.sams at gmail dot com> 2012-09-22 09:21:48 UTC ---
ok the ^^^^ doesn't point where I wanted it to. To be more clear:
Current output:
{name="struct1.public.a",exp="a",numchild="0"
Expected output:
{name="struct1.public.a",exp="a",numchild="2"
(after -var-list-children --all-values struct1.public)
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* [Bug mi/14607] -var-list-children reports wrong numchild count
2012-09-22 9:19 [Bug mi/14607] New: -var-list-children reports wrong numchild count niko.sams at gmail dot com
2012-09-22 9:21 ` [Bug mi/14607] " niko.sams at gmail dot com
@ 2012-09-22 9:24 ` niko.sams at gmail dot com
2022-05-25 19:00 ` tromey at sourceware dot org
2023-08-31 17:29 ` tromey at sourceware dot org
3 siblings, 0 replies; 5+ messages in thread
From: niko.sams at gmail dot com @ 2012-09-22 9:24 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=14607
Niko Sams <niko.sams at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |niko.sams at gmail dot com
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* [Bug mi/14607] -var-list-children reports wrong numchild count
2012-09-22 9:19 [Bug mi/14607] New: -var-list-children reports wrong numchild count niko.sams at gmail dot com
2012-09-22 9:21 ` [Bug mi/14607] " niko.sams at gmail dot com
2012-09-22 9:24 ` niko.sams at gmail dot com
@ 2022-05-25 19:00 ` tromey at sourceware dot org
2023-08-31 17:29 ` tromey at sourceware dot org
3 siblings, 0 replies; 5+ messages in thread
From: tromey at sourceware dot org @ 2022-05-25 19:00 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14607
Tom Tromey <tromey at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tromey at sourceware dot org
--- Comment #2 from Tom Tromey <tromey at sourceware dot org> ---
'numchild' isn't reliable for a dynamic varobj.
This is documented in the MI docs:
'numchild'
The number of children of the varobj. This number is not
necessarily reliable for a dynamic varobj. Instead, you must
examine the 'has_more' attribute.
This is a little confusing because in this command:
-var-list-children --all-values struct1.public
^done,numchild="1",children=[child={name="struct1.public.a",exp="a",numchild="0",value="{...}",type="std::vector<int,
std::allocator<int> >",displayhint="array",dynamic="1"}],has_more="0"
... the has_more here refers to 'struct1.public' (which really only
does have one child), and 'a' doesn't have a has_more here.
Instead one must list the children of 'a' to find out.
So, I'm somewhat inclined to mark this as not a bug.
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* [Bug mi/14607] -var-list-children reports wrong numchild count
2012-09-22 9:19 [Bug mi/14607] New: -var-list-children reports wrong numchild count niko.sams at gmail dot com
` (2 preceding siblings ...)
2022-05-25 19:00 ` tromey at sourceware dot org
@ 2023-08-31 17:29 ` tromey at sourceware dot org
3 siblings, 0 replies; 5+ messages in thread
From: tromey at sourceware dot org @ 2023-08-31 17:29 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=14607
Tom Tromey <tromey at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |INVALID
Status|NEW |RESOLVED
--- Comment #3 from Tom Tromey <tromey at sourceware dot org> ---
Finally came back around to this.
I think it isn't a bug.
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2012-09-22 9:19 [Bug mi/14607] New: -var-list-children reports wrong numchild count niko.sams at gmail dot com
2012-09-22 9:21 ` [Bug mi/14607] " niko.sams at gmail dot com
2012-09-22 9:24 ` niko.sams at gmail dot com
2022-05-25 19:00 ` tromey at sourceware dot org
2023-08-31 17:29 ` tromey at sourceware dot org
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