Attached below is an update to the testcase file, to fix the scan-assembler
regexp comment character matching. This uses the same regexp element that H-P
Nilsson used in the fix to nested-3.C two days ago.
By the way, I ran check-g++ for dwarf2.exp on this change, no regressions.
Ok to commit?
paul
On Sep 17, 2012, at 5:24 PM, <paul_kon...@dell.com>
<paul_kon...@dell.com> wrote:
> If the only reference in a source file is to a static method of a class, then
> GCC would output debug information for the class name but not any of its
> members or base classes. The attached patch fixes this by having
> "prune_unused_types_mark" mark all of the parent's children if the parent DIE
> type is for a class.
>
> The associated new testcase verifies this, and also verifies this that
> references to a function in a namespace do *not* cause other parts of that
> namespace to be emitted as debug information, but that references to a method
> in a class (or struct or union) do emit the other information for that class.
>
> Ok to commit? This would close PR/54508.
>
> paul
>
> ChangeLog:
>
> 2012-09-17 Paul Koning <n...@arrl.net>
>
> * dwarf2out.c (prune_unused_types_mark): Mark all of parent's
> children if parent is a class.
>
> testsuite/ChangeLog:
>
> 2012-09-17 Paul Koning <n...@arrl.net>
>
> * g++.dg/debug/dwarf2/pr54508.C: New.
>
> Index: gcc/dwarf2out.c
> ===================================================================
> --- gcc/dwarf2out.c (revision 191408)
> +++ gcc/dwarf2out.c (working copy)
> @@ -21033,9 +21033,13 @@
> prune_unused_types_mark_generic_parms_dies (die);
>
> /* We also have to mark its parents as used.
> - (But we don't want to mark our parents' kids due to this.) */
> + (But we don't want to mark our parent's kids due to this,
> + unless it is a class.) */
> if (die->die_parent)
> - prune_unused_types_mark (die->die_parent, 0);
> + prune_unused_types_mark (die->die_parent,
> + (die->die_parent->die_tag == DW_TAG_class_type
> ||
> + die->die_parent->die_tag ==
> DW_TAG_structure_type ||
> + die->die_parent->die_tag ==
> DW_TAG_union_type));
>
> /* Mark any referenced nodes. */
> prune_unused_types_walk_attribs (die);
> Index: gcc/testsuite/g++.dg/debug/dwarf2/pr54508.C
> ===================================================================
> --- gcc/testsuite/g++.dg/debug/dwarf2/pr54508.C (revision 0)
> +++ gcc/testsuite/g++.dg/debug/dwarf2/pr54508.C (revision 0)
> @@ -0,0 +1,67 @@
> +// PR debug/54508
> +// { dg-do compile }
> +// { dg-options "-g2 -dA" }
> +
> +// { dg-final { scan-assembler "\"cbase\\\\0\"\[ \t\]+\#
> DW_AT_name\|DW_AT_name: \"cbase\"" } }
> +// { dg-final { scan-assembler "\"OPCODE\\\\0\"\[ \t\]+\#
> DW_AT_name\|DW_AT_name: \"OPCODE\"" } }
> +// { dg-final { scan-assembler "\"bi\\\\0\"\[ \t\]+\# DW_AT_name" } }
> +// { dg-final { scan-assembler "\"si\\\\0\"\[ \t\]+\# DW_AT_name" } }
> +// { dg-final { scan-assembler "\"f1\\\\0\"\[ \t\]+\# DW_AT_name" } }
> +// { dg-final { scan-assembler "\"f2\\\\0\"\[ \t\]+\# DW_AT_name" } }
> +// { dg-final { scan-assembler-not "\"nc\\\\0\"\[ \t\]+\#
> DW_AT_name\|DW_AT_name: \"nc\"" } }
> +...
// PR debug/54508
// { dg-do compile }
// { dg-options "-g2 -dA" }
// { dg-final { scan-assembler "\"cbase\\\\0\"\[ \t\]+\[#;/!|@\]+
DW_AT_name\|DW_AT_name: \"cbase\"" } }
// { dg-final { scan-assembler "\"OPCODE\\\\0\"\[ \t\]+\[#;/!|@\]+
DW_AT_name\|DW_AT_name: \"OPCODE\"" } }
// { dg-final { scan-assembler "\"bi\\\\0\"\[ \t\]+\[#;/!|@\]+ DW_AT_name" } }
// { dg-final { scan-assembler "\"si\\\\0\"\[ \t\]+\[#;/!|@\]+ DW_AT_name" } }
// { dg-final { scan-assembler "\"f1\\\\0\"\[ \t\]+\[#;/!|@\]+ DW_AT_name" } }
// { dg-final { scan-assembler "\"f2\\\\0\"\[ \t\]+\[#;/!|@\]+ DW_AT_name" } }
// { dg-final { scan-assembler-not "\"nc\\\\0\"\[ \t\]+\#
DW_AT_name\|DW_AT_name: \"nc\"" } }
class cbase
{
public:
static int si;
int bi;
};
class c : public cbase
{
public:
enum
{
OPCODE = 251
};
int i ;
static const char *testc (void) { return "foo"; }
};
struct s
{
int f1;
static const char *tests (void) { return "test"; }
};
union u
{
int f2;
double d;
static const char *testu (void) { return "test union"; }
};
namespace n
{
const char *ntest (void) { return "test n"; }
class nc
{
public:
int i;
static int sj;
};
}
extern void send (int, int, const void *, int);
void test (int src)
{
int cookie = 1;
send(src, c::OPCODE, c::testc (), cookie);
send(src, c::OPCODE, s::tests (), cookie);
send(src, c::OPCODE, u::testu (), cookie);
send(src, c::OPCODE, n::ntest (), cookie);
}
