[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[dodji at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

--- Comment #5 from Dodji Seketeli <dodji at gcc dot gnu.org> 2010-12-15 10:21:41 UTC ---
(In reply to comment #3)
> The ordinary cases work fine with svn trunk gcc.
> However, member pointers still don't have all the info emitted.
> Consider this test case:
> 
> struct S { int f; };
> template<int S::*MP> struct T { };
> T<&S::f> v;
> 
> For v's type, I just see:
> 
>  <2><4f>: Abbrev Number: 6 (DW_TAG_template_value_param)
>     <50>   DW_AT_name        : MP       
>     <53>   DW_AT_type        : <0x58>   
> 
> That is, this parameter has no value.

I have opened PR debug/46955 to track this as I believe the bug you describe is
slightly different from this one, even if they fall in the same category.

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[dodji at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

--- Comment #6 from Dodji Seketeli <dodji at gcc dot gnu.org> 2010-12-15 21:28:08 UTC ---
(In reply to comment #4)

> I don't see the right results for Base<long, ...>.  It is missing
> all the template parameters:

I think this problem is slightly different from what is happening in the
original bug as well. I have opened PR debug/46973 to analyse and track this
issue there.

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[dodji at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

--- Comment #7 from Dodji Seketeli <dodji at gcc dot gnu.org> 2011-06-09 21:50:01 UTC ---
Another instance of bug that resembles this one is PR debug/49348

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[dodji at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

--- Comment #8 from Dodji Seketeli <dodji at gcc dot gnu.org> 2011-06-09 21:53:22 UTC ---
Note that I am going to re-submit the fix to this bug now that I am about to
remove template arguments from DW_AT_name for template specializations (PR
debug/49312)

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[tromey at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

--- Comment #9 from Tom Tromey <tromey at gcc dot gnu.org> 2011-06-10 16:09:38 UTC ---
See PR 49366 as well.

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[tromey at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

--- Comment #10 from Tom Tromey <tromey at gcc dot gnu.org> ---
Today I noticed another case.  If you have a template like:

template<typename R, const char *&NAME, typename A>
[...]

... then NAME is not given a value in the instantiation:

 <2><65c5>: Abbrev Number: 51 (DW_TAG_template_type_param)
    <65c6>   DW_AT_name        : R      
    <65c8>   DW_AT_type        : <0x3042>       
 <2><65cc>: Abbrev Number: 122 (DW_TAG_template_value_param)
    <65cd>   DW_AT_name        : (indirect string, offset: 0x6768): NAME        
    <65d1>   DW_AT_type        : <0x66ac>       
 <2><65d5>: Abbrev Number: 51 (DW_TAG_template_type_param)
    <65d6>   DW_AT_name        : A1     
    <65d9>   DW_AT_type        : <0x30aa>

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[tromey at gcc dot gnu dot org]

------- Comment #4 from tromey at gcc dot gnu dot org  2010-08-31 18:33 -------
Created an attachment (id=21610)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=21610&action=view)
a simple test case

I'm attaching "temargs.cc", a simple test case from the gdb test suite.
I compiled this with today's svn trunk gcc.

When I dump the resulting DWARF I see good results for Base<double, ...>:

 <1><47>: Abbrev Number: 5 (DW_TAG_structure_type)
    <48>   DW_AT_name        : (indirect string, offset: 0x43): Base<double,
23, (& a_global), &S::f>   
    <4c>   DW_AT_byte_size   : 1        
    <4d>   DW_AT_decl_file   : 1        
    <4e>   DW_AT_decl_line   : 29       
    <4f>   DW_AT_sibling     : <0xb4>   
 <2><53>: Abbrev Number: 6 (DW_TAG_template_type_param)
    <54>   DW_AT_name        : T        
    <56>   DW_AT_type        : <0xb4>   
[...]


But I don't see the right results for Base<long, ...>.  It is missing
all the template parameters:

 <1><d0>: Abbrev Number: 5 (DW_TAG_structure_type)
    <d1>   DW_AT_name        : (indirect string, offset: 0x191): Base<long int,
47, (& a_global), &S::f>        
    <d5>   DW_AT_byte_size   : 1        
    <d6>   DW_AT_decl_file   : 1        
    <d7>   DW_AT_decl_line   : 29       
    <d8>   DW_AT_sibling     : <0x105>  
 <2><dc>: Abbrev Number: 16 (DW_TAG_structure_type)
    <dd>   DW_AT_name        : (indirect string, offset: 0x157): Inner<float>   
    <e1>   DW_AT_byte_size   : 1        
    <e2>   DW_AT_decl_file   : 1        
    <e3>   DW_AT_decl_line   : 32       
 <3><e4>: Abbrev Number: 6 (DW_TAG_template_type_param)
    <e5>   DW_AT_name        : Z        
    <e7>   DW_AT_type        : <0x10c>  
 <3><eb>: Abbrev Number: 12 (DW_TAG_subprogram)
    <ec>   DW_AT_external    : 1        
    <ed>   DW_AT_name        : (indirect string, offset: 0xa8): inner_m 
    <f1>   DW_AT_decl_file   : 1        
    <f2>   DW_AT_decl_line   : 34       
    <f3>   DW_AT_MIPS_linkage_name: (indirect string, offset: 0xb0):
_ZN4BaseIlLi47EXadL_Z8a_globalEEXadL_ZN1S1fEEEE5InnerIfE7inner_mEv 
    <f7>   DW_AT_declaration : 1        
    <f8>   DW_AT_object_pointer: <0xfc> 
 <4><fc>: Abbrev Number: 11 (DW_TAG_formal_parameter)
    <fd>   DW_AT_type        : <0x113>  
    <101>   DW_AT_artificial  : 1       


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[tromey at gcc dot gnu dot org]

------- Comment #3 from tromey at gcc dot gnu dot org  2010-07-21 15:19 -------
The ordinary cases work fine with svn trunk gcc.
However, member pointers still don't have all the info emitted.
Consider this test case:

struct S { int f; };
template<int S::*MP> struct T { };
T<&S::f> v;

For v's type, I just see:

 <2><4f>: Abbrev Number: 6 (DW_TAG_template_value_param)
    <50>   DW_AT_name        : MP       
    <53>   DW_AT_type        : <0x58>   

That is, this parameter has no value.


-- 

tromey at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at gcc dot gnu dot
                   |                            |org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[dodji at gcc dot gnu dot org]

------- Comment #2 from dodji at gcc dot gnu dot org  2009-10-21 13:10 -------
Created an attachment (id=18857)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18857&action=view)
Enhanced patch


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[dodji at gcc dot gnu dot org]

------- Comment #1 from dodji at gcc dot gnu dot org  2009-10-17 11:41 -------
Patch sent to http://gcc.gnu.org/ml/gcc-patches/2009-10/msg01126.html .


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736

[Bug debug/41736] missing DW_TAG_template_*_ in some cases

[dodji at gcc dot gnu dot org]

-- 

dodji at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |dodji at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-10-17 08:00:00
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41736