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* [Bug exp/12355] New: GDB takes address of a bit-field. It should not.
@ 2010-12-29 12:06 jan.kratochvil at redhat dot com
2010-12-29 12:46 ` [Bug exp/12355] " schwab@linux-m68k.org
2010-12-30 3:25 ` jan.kratochvil at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: jan.kratochvil at redhat dot com @ 2010-12-29 12:06 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12355
Summary: GDB takes address of a bit-field. It should not.
Product: gdb
Version: HEAD
Status: NEW
Severity: normal
Priority: P2
Component: exp
AssignedTo: unassigned@sourceware.org
ReportedBy: jan.kratochvil@redhat.com
struct { unsigned b : 1; } v;
void *p = &v.b;
int main (void) { return 0; }
gcc (GCC) 4.6.0 20101227 (experimental)
1.c:2:1: error: cannot take address of bit-field ‘b’
GNU gdb (GDB) 7.2.50.20101228-cvs
(gdb) p &v.b
$1 = (unsigned int *) 0x600818
This is confusing for watchpoints etc. if one does not expect a bit-field.
(starting point: value_addr())
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* [Bug exp/12355] GDB takes address of a bit-field. It should not.
2010-12-29 12:06 [Bug exp/12355] New: GDB takes address of a bit-field. It should not jan.kratochvil at redhat dot com
@ 2010-12-29 12:46 ` schwab@linux-m68k.org
2010-12-30 3:25 ` jan.kratochvil at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: schwab@linux-m68k.org @ 2010-12-29 12:46 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12355
--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> 2010-12-29 12:06:30 UTC ---
GDB does a few things that are invalid in C, which is not necessarily a bad
thing.
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* [Bug exp/12355] GDB takes address of a bit-field. It should not.
2010-12-29 12:06 [Bug exp/12355] New: GDB takes address of a bit-field. It should not jan.kratochvil at redhat dot com
2010-12-29 12:46 ` [Bug exp/12355] " schwab@linux-m68k.org
@ 2010-12-30 3:25 ` jan.kratochvil at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: jan.kratochvil at redhat dot com @ 2010-12-30 3:25 UTC (permalink / raw)
To: gdb-prs
http://sourceware.org/bugzilla/show_bug.cgi?id=12355
--- Comment #2 from Jan Kratochvil <jan.kratochvil at redhat dot com> 2010-12-29 12:46:11 UTC ---
OK, understood. But there should be some new operator for it or a query() or
at least a watning().
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2010-12-29 12:06 [Bug exp/12355] New: GDB takes address of a bit-field. It should not jan.kratochvil at redhat dot com
2010-12-29 12:46 ` [Bug exp/12355] " schwab@linux-m68k.org
2010-12-30 3:25 ` jan.kratochvil at redhat dot com
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