[Bug debug/41438] New: [4.5 Regression] VTA: libgomp build fails due to inconsistent debug info

[Bug debug/41438] New: [4.5 Regression] VTA: libgomp build fails due to inconsistent debug info

[sje at cup dot hp dot com]

If I compile the included two C files on IA64 HP-UX and then link them into
a shared library using the HP linker I get an error from the HP linker.

$ gcc -mlp64 -shared -fPIC -O2 -g x.c y.c
ld: Non TP-relative relocation for the thread local storage symbol
"gomp_tls_data"
1 errors.
collect2: ld returned 1 exit status

While I do not get this error on IA64 Linux the compiler does generate the same
debug information as on HP-UX, the linker just doesn't complain.

If I look at the generated assembly code for x.c and y.c the .debug_info
section of x.c contains:

        data8.ua        gomp_tls_data#+8

while the .debug_info section of y.c contains:

        data8.ua        @dtprel(gomp_tls_data#)

If I change x.s by hand to use dtprel then the HP linker does not complain.

Here are the two C files, x.c and y.c:

============ x.c =============

struct gomp_team_state { };
struct gomp_thread
{
  void (*fn) (void *data);
  struct gomp_team_state ts;
};
extern __thread struct gomp_thread gomp_tls_data;
inline struct gomp_thread *gomp_thread (void)
{
  return &gomp_tls_data;
}
GOMP_parallel_end (void)
{
  struct gomp_team_state *ts = &gomp_thread ()->ts;
}

========== y.c ===============

struct gomp_team_state { };
struct gomp_thread
{
  void (*fn) (void *data);
  struct gomp_team_state ts;
};

__thread struct gomp_thread gomp_tls_data;


-- 
           Summary: [4.5 Regression] VTA: libgomp build fails due to
                    inconsistent debug info
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
        AssignedTo: aoliva at gcc dot gnu dot org
        ReportedBy: sje at cup dot hp dot com
 GCC build triplet: ia64-hp-hpux11.23
  GCC host triplet: ia64-hp-hpux11.23
GCC target triplet: ia64-hp-hpux11.23


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41438

[Bug debug/41438] [4.5 Regression] VTA: libgomp build fails due to inconsistent debug info

[jakub at gcc dot gnu dot org]

------- Comment #1 from jakub at gcc dot gnu dot org  2009-09-29 14:40 -------
My http://gcc.gnu.org/ml/gcc-patches/2009-09/msg02070.html patch fixes this
too.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|aoliva at gcc dot gnu dot   |jakub at gcc dot gnu dot org
                   |org                         |
                URL|                            |http://gcc.gnu.org/ml/gcc-
                   |                            |patches/2009-
                   |                            |09/msg02070.html
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2009-09-29 14:40:29
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41438

[Bug debug/41438] [4.5 Regression] VTA: libgomp build fails due to inconsistent debug info

[jakub at gcc dot gnu dot org]

------- Comment #2 from jakub at gcc dot gnu dot org  2009-09-29 17:34 -------
Subject: Bug 41438

Author: jakub
Date: Tue Sep 29 17:33:58 2009
New Revision: 152282

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=152282
Log:
        PR debug/41438
        * dwarf2out.c (const_ok_for_output_1, const_ok_for_output): New
        functions.
        (mem_loc_descriptor, loc_descriptor, add_const_value_attribute): Bail
        out if !const_ok_for_output.

        PR debug/41474
        * dwarf2out.c (mem_loc_descriptor) <case CONCAT, case CONCATN,
        case VAR_LOCATION>: Remove gcc_unreachable ().

        * gcc.dg/debug/dwarf2/const-1.c: Add dg-require-visibility, make x
        hidden.
        * g++.dg/debug/dwarf2/const-1.C: Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/debug/dwarf2/const1.C
    trunk/gcc/testsuite/gcc.dg/debug/dwarf2/const-1.c


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41438

[Bug debug/41438] [4.5 Regression] VTA: libgomp build fails due to inconsistent debug info

[jakub at gcc dot gnu dot org]

------- Comment #3 from jakub at gcc dot gnu dot org  2009-09-29 17:39 -------
Fixed.


-- 

jakub at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41438