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c_value_print: Revert 'val' to a reference for TYPE_CODE_STRUCT 

Currently c_value_print will turn struct reference values into pointers before
doing a set of RTTI checks.  This was introduced as a fix to PR c++/15401.
If there's RTTI the pointer will be adjusted and converted back to a reference.
However, if there's no RTTI the value will still be treated as a pointer during
the remainder of the function.
This patch moves the conversion down so that it's always performed when needed.

Notice this currently has not user-visible effects, so can be seen as a small
code cleanup.  However, it'll be necessary for the bug-fix for handling
synthetic C++ references.  It causes no testsuite regressions.

gdb/ChangeLog:
2016-04-26  Martin Galvan  <martin.galvan@tallertechnologies.com>

	* c-valprint.c (c_value_print): Always convert val back to reference
	type if we converted it to a pointer type.
This commit is contained in:
Martin Galvan 2016-04-27 12:01:14 -03:00
parent 310cdbb651
commit 476350ba48
2 changed files with 14 additions and 8 deletions
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5
gdb/ChangeLog
View File

@ -1,3 +1,8 @@
2016-04-27 Martin Galvan <martin.galvan@tallertechnologies.com>
* c-valprint.c (c_value_print): Always convert val back to reference
type if we converted it to a pointer type.
2016-04-27 Andreas Arnez <arnez@linux.vnet.ibm.com>
* configure.ac: Enhance configure check for babeltrace to reject

17
gdb/c-valprint.c
View File

@ -611,7 +611,7 @@ c_value_print (struct value *val, struct ui_file *stream,
fprintf_filtered (stream, "(");
if (value_entirely_available (val))
{
{
real_type = value_rtti_indirect_type (val, &full, &top,
&using_enc);
if (real_type)
@ -623,18 +623,19 @@ c_value_print (struct value *val, struct ui_file *stream,
val = value_from_pointer (real_type,
value_as_address (val) - top);
if (is_ref)
{
val = value_ref (value_ind (val));
type = value_type (val);
}
/* Note: When we look up RTTI entries, we don't get
any information on const or volatile
attributes. */
}
}
type_print (type, "", stream, -1);
if (is_ref)
{
val = value_ref (value_ind (val));
type = value_type (val);
}
type_print (type, "", stream, -1);
fprintf_filtered (stream, ") ");
val_type = type;
}