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* [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero
@ 2020-05-07 7:10 andre.poenitz at qt dot io
2020-05-12 11:26 ` [Bug python/25936] " ssbssa at sourceware dot org
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: andre.poenitz at qt dot io @ 2020-05-07 7:10 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=25936
Bug ID: 25936
Summary: Sizeof value for arrays reported wrongly as zero
Product: gdb
Version: 9.1
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: python
Assignee: unassigned at sourceware dot org
Reporter: andre.poenitz at qt dot io
Target Milestone: ---
In the code below, the array data member reported to have a size zero.
The behavior depends on the actual types in the array, std::fstream and
std::strings are only examples, possibly it works for types that are completely
inlined.
#include <fstream>
#include <string>
struct S
{
std::fstream items[5]; // Does not work. Same for QObject, ...
// std::string items[5]; // Works. Same for int, ...
};
int main()
{
S s;
// Break here.
// py print(gdb.parse_and_eval('s').type.sizeof) yields 2640 // Good
// py print(gdb.parse_and_eval('s.items').type.sizeof) yields 0 // Bad
// py print(gdb.parse_and_eval('s').type.fields()[0].type.sizeof) yields 0
// Bad
return s.items[0].is_open();
// return int(s.items[0].size());
}
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* [Bug python/25936] Sizeof value for arrays reported wrongly as zero
2020-05-07 7:10 [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero andre.poenitz at qt dot io
@ 2020-05-12 11:26 ` ssbssa at sourceware dot org
2020-05-25 6:15 ` andre.poenitz at qt dot io
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ssbssa at sourceware dot org @ 2020-05-12 11:26 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=25936
Hannes Domani <ssbssa at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ssbssa at sourceware dot org
--- Comment #1 from Hannes Domani <ssbssa at sourceware dot org> ---
It's not really about python, the simple sizeof() also gives 0:
(gdb) p sizeof(s.items)
$1 = 0
(gdb) p sizeof(s.items[0])
$2 = 0
(gdb) p sizeof(std::fstream)
$3 = 0
It seems it doesn't have all the necessary debug information for std::fstream:
(gdb) pt s.items
type = class std::basic_fstream<char, std::char_traits<char> > {
<incomplete type>
} [5]
(gdb) pt std::fstream
type = class std::basic_fstream<char, std::char_traits<char> > {
<incomplete type>
}
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* [Bug python/25936] Sizeof value for arrays reported wrongly as zero
2020-05-07 7:10 [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero andre.poenitz at qt dot io
2020-05-12 11:26 ` [Bug python/25936] " ssbssa at sourceware dot org
@ 2020-05-25 6:15 ` andre.poenitz at qt dot io
2020-05-30 11:39 ` ssbssa at sourceware dot org
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: andre.poenitz at qt dot io @ 2020-05-25 6:15 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=25936
--- Comment #2 from Andre' <andre.poenitz at qt dot io> ---
What would be the right component? "symtab"?
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* [Bug python/25936] Sizeof value for arrays reported wrongly as zero
2020-05-07 7:10 [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero andre.poenitz at qt dot io
2020-05-12 11:26 ` [Bug python/25936] " ssbssa at sourceware dot org
2020-05-25 6:15 ` andre.poenitz at qt dot io
@ 2020-05-30 11:39 ` ssbssa at sourceware dot org
2020-05-30 12:47 ` [Bug symtab/25936] " andre.poenitz at qt dot io
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: ssbssa at sourceware dot org @ 2020-05-30 11:39 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=25936
--- Comment #3 from Hannes Domani <ssbssa at sourceware dot org> ---
(In reply to Andre' from comment #2)
> What would be the right component? "symtab"?
I think so, yes.
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* [Bug symtab/25936] Sizeof value for arrays reported wrongly as zero
2020-05-07 7:10 [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero andre.poenitz at qt dot io
` (2 preceding siblings ...)
2020-05-30 11:39 ` ssbssa at sourceware dot org
@ 2020-05-30 12:47 ` andre.poenitz at qt dot io
2020-05-30 12:47 ` andre.poenitz at qt dot io
2023-03-06 22:42 ` tromey at sourceware dot org
5 siblings, 0 replies; 7+ messages in thread
From: andre.poenitz at qt dot io @ 2020-05-30 12:47 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=25936
Andre' <andre.poenitz at qt dot io> changed:
What |Removed |Added
----------------------------------------------------------------------------
Component|python |symtab
--- Comment #4 from Andre' <andre.poenitz at qt dot io> ---
Ok, thanks.
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* [Bug symtab/25936] Sizeof value for arrays reported wrongly as zero
2020-05-07 7:10 [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero andre.poenitz at qt dot io
` (3 preceding siblings ...)
2020-05-30 12:47 ` [Bug symtab/25936] " andre.poenitz at qt dot io
@ 2020-05-30 12:47 ` andre.poenitz at qt dot io
2023-03-06 22:42 ` tromey at sourceware dot org
5 siblings, 0 replies; 7+ messages in thread
From: andre.poenitz at qt dot io @ 2020-05-30 12:47 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=25936
--- Comment #5 from Andre' <andre.poenitz at qt dot io> ---
Ok, thanks.
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* [Bug symtab/25936] Sizeof value for arrays reported wrongly as zero
2020-05-07 7:10 [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero andre.poenitz at qt dot io
` (4 preceding siblings ...)
2020-05-30 12:47 ` andre.poenitz at qt dot io
@ 2023-03-06 22:42 ` tromey at sourceware dot org
5 siblings, 0 replies; 7+ messages in thread
From: tromey at sourceware dot org @ 2023-03-06 22:42 UTC (permalink / raw)
To: gdb-prs
https://sourceware.org/bugzilla/show_bug.cgi?id=25936
Tom Tromey <tromey at sourceware dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |tromey at sourceware dot org
Status|UNCONFIRMED |NEW
Last reconfirmed| |2023-03-06
Ever confirmed|0 |1
--- Comment #6 from Tom Tromey <tromey at sourceware dot org> ---
Still buggy.
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end of thread, other threads:[~2023-03-06 22:42 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2020-05-07 7:10 [Bug python/25936] New: Sizeof value for arrays reported wrongly as zero andre.poenitz at qt dot io
2020-05-12 11:26 ` [Bug python/25936] " ssbssa at sourceware dot org
2020-05-25 6:15 ` andre.poenitz at qt dot io
2020-05-30 11:39 ` ssbssa at sourceware dot org
2020-05-30 12:47 ` [Bug symtab/25936] " andre.poenitz at qt dot io
2020-05-30 12:47 ` andre.poenitz at qt dot io
2023-03-06 22:42 ` tromey at sourceware dot org
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