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* dwarf2read.c (quirk_gcc_member_function_pointer): New.

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(read_structure_type): Call it.
This commit is contained in:
Daniel Jacobowitz 2006-08-18 04:10:30 +00:00
parent 0b999e72de
commit c0dd20ea15
2 changed files with 71 additions and 1 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2006-08-18 Daniel Jacobowitz <dan@codesourcery.com>
* dwarf2read.c (quirk_gcc_member_function_pointer): New.
(read_structure_type): Call it.
2006-08-16 Daniel Jacobowitz <dan@codesourcery.com>
* NEWS: Mention "set trust-readonly-sections" fix.

67
gdb/dwarf2read.c
View File

@ -3708,6 +3708,69 @@ is_vtable_name (const char *name, struct dwarf2_cu *cu)
return 0;
}
/* GCC outputs unnamed structures that are really pointers to member
functions, with the ABI-specified layout. If DIE (from CU) describes
such a structure, set its type, and return nonzero. Otherwise return
zero. */
static int
quirk_gcc_member_function_pointer (struct die_info *die, struct dwarf2_cu *cu)
{
struct objfile *objfile = cu->objfile;
struct type *type;
struct die_info *pfn_die, *delta_die;
struct attribute *pfn_name, *delta_name;
struct type *pfn_type, *domain_type;
/* Check for a structure with no name and two children. */
if (die->tag != DW_TAG_structure_type
|| dwarf2_attr (die, DW_AT_name, cu) != NULL
|| die->child == NULL
|| die->child->sibling == NULL
|| (die->child->sibling->sibling != NULL
&& die->child->sibling->sibling->tag != DW_TAG_padding))
return 0;
/* Check for __pfn and __delta members. */
pfn_die = die->child;
pfn_name = dwarf2_attr (pfn_die, DW_AT_name, cu);
if (pfn_die->tag != DW_TAG_member
|| pfn_name == NULL
|| DW_STRING (pfn_name) == NULL
|| strcmp ("__pfn", DW_STRING (pfn_name)) != 0)
return 0;
delta_die = pfn_die->sibling;
delta_name = dwarf2_attr (delta_die, DW_AT_name, cu);
if (delta_die->tag != DW_TAG_member
|| delta_name == NULL
|| DW_STRING (delta_name) == NULL
|| strcmp ("__delta", DW_STRING (delta_name)) != 0)
return 0;
/* Find the type of the method. */
pfn_type = die_type (pfn_die, cu);
if (pfn_type == NULL
|| TYPE_CODE (pfn_type) != TYPE_CODE_PTR
|| TYPE_CODE (TYPE_TARGET_TYPE (pfn_type)) != TYPE_CODE_FUNC)
return 0;
/* Look for the "this" argument. */
pfn_type = TYPE_TARGET_TYPE (pfn_type);
if (TYPE_NFIELDS (pfn_type) == 0
|| TYPE_CODE (TYPE_FIELD_TYPE (pfn_type, 0)) != TYPE_CODE_PTR)
return 0;
domain_type = TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (pfn_type, 0));
type = alloc_type (objfile);
smash_to_method_type (type, domain_type, TYPE_TARGET_TYPE (pfn_type),
TYPE_FIELDS (pfn_type), TYPE_NFIELDS (pfn_type),
TYPE_VARARGS (pfn_type));
type = lookup_pointer_type (type);
set_die_type (die, type, cu);
return 1;
}
/* Called when we find the DIE that starts a structure or union scope
(definition) to process all dies that define the members of the
@ -3737,8 +3800,10 @@ read_structure_type (struct die_info *die, struct dwarf2_cu *cu)
if (die->type)
return;
type = alloc_type (objfile);
if (quirk_gcc_member_function_pointer (die, cu))
return;
type = alloc_type (objfile);
INIT_CPLUS_SPECIFIC (type);
attr = dwarf2_attr (die, DW_AT_name, cu);
if (attr && DW_STRING (attr))