commit 81d24c396c66dde7db2d9b567451f99081a2eab7

Author: philippe <philippe@a5019735-40e9-0310-863c-91ae7b9d1cf9>

Date:   Wed Dec 5 21:08:24 2012 +0000

    fix 310424  --read-var-info does not properly describe static variables

    This patch changes the way static variables are

    recorded by readdwarf3.c (when giving --read-var-info=yes),

    improving the way such variables are described.

    Currently:

    A static variable does not have the DW_AT_external tag.

    So, readdwarf3.c does not consider it a global variable.

    It is rather considered a "local" variable.

    When it is recorded, it is associated to a range of program counters

    (the functions in the file where it is visible).

    However, even if the static variable is only visible

    in the source file where it is declared, it can in reality

    be used by any range of program counters, typically

    by having the address of the local variable passed

    to other functions.

    Such local variable can then only be described

    when the program counter is in the range of program

    counters for which it has been recorded.

    However, this (local) description is obtained

    by a kludge in debuginfo.c (around line 3285).

    This kludge then produces a strange description,

    telling that the variable has been declared in

    frame 0 of a thread (see second example below).

    The kludge is not always able to describe

    the address (if the IP of the tid is in another file than

    where the variable has been declared).

    I suspect the kludge can sometimes describe the var as being

    declared in an unrelated thread

    (e.g. if an error is triggered by tid 5, but tid1 is by

    luck in an IP corresponding to the recorded range).

    The patch changes the way a static variable is recorded:

    if DW_AT_external tag is found, a variable is marked as global.

    If a variable is not external, but is seen when level is 1,

    then we record the variable as a global variable (i.e.

    with a full IP range).

    This improves the way such static variable are described:

    * they are described even if being accessed by other files.

    * their description is not in an artificial "thread frame".

    First example:

    **************

    a variable cannot be described because it is

    accessed by a function in another file:

    with the trunk:

    ==20410== ----------------------------------------------------------------

    ==20410==

    ==20410== Possible data race during read of size 4 at 0x600F54 by thread #1

    ==20410== Locks held: none

    ==20410==    at 0x4007E4: a (abc.c:42)

    ==20410==    by 0x4006BC: main (mabc.c:24)

    ==20410==

    ==20410== This conflicts with a previous write of size 4 by thread #2

    ==20410== Locks held: none

    ==20410==    at 0x4007ED: a (abc.c:42)

    ==20410==    by 0x400651: brussels_fn (mabc.c:9)

    ==20410==    by 0x4C2B54E: mythread_wrapper (hg_intercepts.c:219)

    ==20410==    by 0x4E348C9: start_thread (pthread_create.c:300)

    ==20410==

    ==20410== ----------------------------------------------------------------

    with the patch:

    ==4515== ----------------------------------------------------------------

    ==4515==

    ==4515== Possible data race during read of size 4 at 0x600F54 by thread #1

    ==4515== Locks held: none

    ==4515==    at 0x4007E4: a (abc.c:42)

    ==4515==    by 0x4006BC: main (mabc.c:24)

    ==4515==

    ==4515== This conflicts with a previous write of size 4 by thread #2

    ==4515== Locks held: none

    ==4515==    at 0x4007ED: a (abc.c:42)

    ==4515==    by 0x400651: brussels_fn (mabc.c:9)

    ==4515==    by 0x4C2B54E: mythread_wrapper (hg_intercepts.c:219)

    ==4515==    by 0x4E348C9: start_thread (pthread_create.c:300)

    ==4515==

    ==4515== Location 0x600f54 is 0 bytes inside global var "static_global"

    ==4515== declared at mabc.c:4

    ==4515==

    ==4515== ----------------------------------------------------------------

    Second example:

    ***************

    When the kludge can describe the variable, it is strangely described

    as being declared in a frame of a thread, while for sure the declaration

    has nothing to do with a thread

    With the trunk:

    ==20410== Location 0x600f68 is 0 bytes inside local var "static_global_a"

    ==20410== declared at abc.c:3, in frame #0 of thread 1

    With the patch:

    ==4515== Location 0x600f68 is 0 bytes inside global var "static_global_a"

    ==4515== declared at abc.c:3

    #include <stdio.h>

    static int static_global_a = 0; //// <<<< this is abc.c:3

    git-svn-id: svn://svn.valgrind.org/valgrind/trunk@13153 a5019735-40e9-0310-863c-91ae7b9d1cf9

diff --git a/coregrind/m_debuginfo/debuginfo.c b/coregrind/m_debuginfo/debuginfo.c

index 59f920d..d3b8ef4 100644

--- a/coregrind/m_debuginfo/debuginfo.c

+++ b/coregrind/m_debuginfo/debuginfo.c

@@ -3282,28 +3282,6 @@ Bool VG_(get_data_description)(

       in the stacks of all the threads.  First try to figure out which

       thread's stack data_addr is in. */

-   /* --- KLUDGE --- Try examining the top frame of all thread stacks.

-      This finds variables which are not stack allocated but are not

-      globally visible either; specifically it appears to pick up

-      variables which are visible only within a compilation unit.

-      These will have the address range of the compilation unit and

-      tend to live at Scope level 1. */

-   VG_(thread_stack_reset_iter)(&tid;;

-   while ( VG_(thread_stack_next)(&tid, &stack_min, &stack_max) ) {

-      if (stack_min >= stack_max)

-         continue; /* ignore obviously stupid cases */

-      if (consider_vars_in_frame( dname1, dname2,

-                                  data_addr,

-                                  VG_(get_IP)(tid),

-                                  VG_(get_SP)(tid), 

-                                  VG_(get_FP)(tid), tid, 0 )) {

-         zterm_XA( dname1 );

-         zterm_XA( dname2 );

-         return True;

-      }

-   }

-   /* --- end KLUDGE --- */

-

    /* Perhaps it's on a thread's stack? */

    found = False;

    VG_(thread_stack_reset_iter)(&tid;;

@@ -3328,9 +3306,6 @@ Bool VG_(get_data_description)(

    n_frames = VG_(get_StackTrace)( tid, ips, N_FRAMES,

                                    sps, fps, 0/*first_ip_delta*/ );

-   /* As a result of KLUDGE above, starting the loop at j = 0

-      duplicates examination of the top frame and so isn't necessary.

-      Oh well. */

    vg_assert(n_frames >= 0 && n_frames <= N_FRAMES);

    for (j = 0; j < n_frames; j++) {

       if (consider_vars_in_frame( dname1, dname2,

diff --git a/drd/tests/annotate_ignore_rw.stderr.exp b/drd/tests/annotate_ignore_rw.stderr.exp

index 24684da..416be80 100644

--- a/drd/tests/annotate_ignore_rw.stderr.exp

+++ b/drd/tests/annotate_ignore_rw.stderr.exp

@@ -1,8 +1,8 @@

 Conflicting load by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_rw.c:?)

-Location 0x........ is 0 bytes inside local var "s_c"

-declared at annotate_ignore_rw.c:12, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_c"

+declared at annotate_ignore_rw.c:12

 Finished.

diff --git a/drd/tests/annotate_ignore_rw2.stderr.exp b/drd/tests/annotate_ignore_rw2.stderr.exp

index ffdb76f..4e96bf3 100644

--- a/drd/tests/annotate_ignore_rw2.stderr.exp

+++ b/drd/tests/annotate_ignore_rw2.stderr.exp

@@ -1,18 +1,18 @@

 Conflicting load by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_rw.c:?)

-Location 0x........ is 0 bytes inside local var "s_b"

-declared at annotate_ignore_rw.c:11, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_b"

+declared at annotate_ignore_rw.c:11

 Conflicting store by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_rw.c:?)

-Location 0x........ is 0 bytes inside local var "s_a"

-declared at annotate_ignore_rw.c:10, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_a"

+declared at annotate_ignore_rw.c:10

 Conflicting load by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_rw.c:?)

-Location 0x........ is 0 bytes inside local var "s_c"

-declared at annotate_ignore_rw.c:12, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_c"

+declared at annotate_ignore_rw.c:12

 Finished.

diff --git a/drd/tests/annotate_ignore_write.stderr.exp b/drd/tests/annotate_ignore_write.stderr.exp

index f26242e..2204d5b 100644

--- a/drd/tests/annotate_ignore_write.stderr.exp

+++ b/drd/tests/annotate_ignore_write.stderr.exp

@@ -1,18 +1,18 @@

 Conflicting load by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_write.c:?)

-Location 0x........ is 0 bytes inside local var "s_b"

-declared at annotate_ignore_write.c:11, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_b"

+declared at annotate_ignore_write.c:11

 Conflicting load by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_write.c:?)

-Location 0x........ is 0 bytes inside local var "s_c"

-declared at annotate_ignore_write.c:12, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_c"

+declared at annotate_ignore_write.c:12

 Conflicting store by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_write.c:?)

-Location 0x........ is 0 bytes inside local var "s_a"

-declared at annotate_ignore_write.c:10, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_a"

+declared at annotate_ignore_write.c:10

 Finished.

diff --git a/drd/tests/annotate_ignore_write2.stderr.exp b/drd/tests/annotate_ignore_write2.stderr.exp

index 03c7766..9b58325 100644

--- a/drd/tests/annotate_ignore_write2.stderr.exp

+++ b/drd/tests/annotate_ignore_write2.stderr.exp

@@ -1,23 +1,23 @@

 Conflicting load by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_write.c:?)

-Location 0x........ is 0 bytes inside local var "s_b"

-declared at annotate_ignore_write.c:11, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_b"

+declared at annotate_ignore_write.c:11

 Conflicting store by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_write.c:?)

-Location 0x........ is 0 bytes inside local var "s_a"

-declared at annotate_ignore_write.c:10, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_a"

+declared at annotate_ignore_write.c:10

 Conflicting load by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_write.c:?)

-Location 0x........ is 0 bytes inside local var "s_c"

-declared at annotate_ignore_write.c:12, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_c"

+declared at annotate_ignore_write.c:12

 Conflicting store by thread 1 at 0x........ size 1

    at 0x........: main (annotate_ignore_write.c:?)

-Location 0x........ is 0 bytes inside local var "s_a"

-declared at annotate_ignore_write.c:10, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_a"

+declared at annotate_ignore_write.c:10

 Finished.

diff --git a/drd/tests/atomic_var.stderr.exp b/drd/tests/atomic_var.stderr.exp

index 7fa1e0e..ad05687 100644

--- a/drd/tests/atomic_var.stderr.exp

+++ b/drd/tests/atomic_var.stderr.exp

@@ -3,8 +3,8 @@ Start of test.

 Conflicting load by thread x at 0x........ size 4

    at 0x........: thread_func_2 (atomic_var.c:?)

    by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?)

-Location 0x........ is 0 bytes inside local var "s_y"

-declared at atomic_var.c:35, in frame #? of thread x

+Location 0x........ is 0 bytes inside global var "s_y"

+declared at atomic_var.c:35

 y = 1

 Test finished.

diff --git a/drd/tests/fp_race.stderr.exp b/drd/tests/fp_race.stderr.exp

index 23873d2..68bd254 100644

--- a/drd/tests/fp_race.stderr.exp

+++ b/drd/tests/fp_race.stderr.exp

@@ -1,8 +1,8 @@

 Conflicting load by thread 1 at 0x........ size 8

    at 0x........: main (fp_race.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at fp_race.c:24, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at fp_race.c:24

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

@@ -10,8 +10,8 @@ Other segment end (thread 2)

 Conflicting store by thread 1 at 0x........ size 8

    at 0x........: main (fp_race.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at fp_race.c:24, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at fp_race.c:24

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

diff --git a/drd/tests/fp_race_xml.stderr.exp b/drd/tests/fp_race_xml.stderr.exp

index 73a530e..05ffe71 100644

--- a/drd/tests/fp_race_xml.stderr.exp

+++ b/drd/tests/fp_race_xml.stderr.exp

@@ -48,8 +48,8 @@

       <line>...</line>

     </frame>

   </stack>

-  <auxwhat>Location 0x........ is 0 bytes inside local var "s_d3"</auxwhat>

-  <xauxwhat><text>declared at fp_race.c:24, in frame #? of thread x</text> <file>fp_race.c</file> <line>...</line> </xauxwhat>

+  <auxwhat>Location 0x........ is 0 bytes inside global var "s_d3"</auxwhat>

+  <xauxwhat><text>declared at fp_race.c:24</text> <file>fp_race.c</file> <line>...</line> </xauxwhat>

   <other_segment_start>

   </other_segment_start>

   <other_segment_end>

@@ -71,8 +71,8 @@

       <line>...</line>

     </frame>

   </stack>

-  <auxwhat>Location 0x........ is 0 bytes inside local var "s_d3"</auxwhat>

-  <xauxwhat><text>declared at fp_race.c:24, in frame #? of thread x</text> <file>fp_race.c</file> <line>...</line> </xauxwhat>

+  <auxwhat>Location 0x........ is 0 bytes inside global var "s_d3"</auxwhat>

+  <xauxwhat><text>declared at fp_race.c:24</text> <file>fp_race.c</file> <line>...</line> </xauxwhat>

   <other_segment_start>

   </other_segment_start>

   <other_segment_end>

diff --git a/drd/tests/hg03_inherit.stderr.exp b/drd/tests/hg03_inherit.stderr.exp

index 62a8d5d..72eb236 100644

--- a/drd/tests/hg03_inherit.stderr.exp

+++ b/drd/tests/hg03_inherit.stderr.exp

@@ -4,13 +4,13 @@ Conflicting store by thread 3 at 0x........ size 4

    at 0x........: t2 (hg03_inherit.c:28)

    by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?)

 Location 0x........ is 0 bytes inside shared[1],

-declared at hg03_inherit.c:11, in frame #? of thread 3

+a global variable declared at hg03_inherit.c:11

 Conflicting store by thread 3 at 0x........ size 4

    at 0x........: t2 (hg03_inherit.c:29)

    by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?)

 Location 0x........ is 0 bytes inside shared[1],

-declared at hg03_inherit.c:11, in frame #? of thread 3

+a global variable declared at hg03_inherit.c:11

 ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)

diff --git a/drd/tests/hg04_race.stderr.exp b/drd/tests/hg04_race.stderr.exp

index 9ea3ccd..5b5969c 100644

--- a/drd/tests/hg04_race.stderr.exp

+++ b/drd/tests/hg04_race.stderr.exp

@@ -3,8 +3,8 @@ Thread 3:

 Conflicting load by thread 3 at 0x........ size 4

    at 0x........: th (hg04_race.c:10)

    by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?)

-Location 0x........ is 0 bytes inside local var "shared"

-declared at hg04_race.c:6, in frame #? of thread 2

+Location 0x........ is 0 bytes inside global var "shared"

+declared at hg04_race.c:6

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

@@ -13,8 +13,8 @@ Other segment end (thread 2)

 Conflicting store by thread 3 at 0x........ size 4

    at 0x........: th (hg04_race.c:10)

    by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?)

-Location 0x........ is 0 bytes inside local var "shared"

-declared at hg04_race.c:6, in frame #? of thread 2

+Location 0x........ is 0 bytes inside global var "shared"

+declared at hg04_race.c:6

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

diff --git a/drd/tests/rwlock_race.stderr.exp b/drd/tests/rwlock_race.stderr.exp

index 8350b50..d3e0b37 100644

--- a/drd/tests/rwlock_race.stderr.exp

+++ b/drd/tests/rwlock_race.stderr.exp

@@ -2,14 +2,14 @@

 Conflicting load by thread x at 0x........ size 4

    at 0x........: thread_func (rwlock_race.c:?)

    by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?)

-Location 0x........ is 0 bytes inside local var "s_racy"

-declared at rwlock_race.c:18, in frame #? of thread x

+Location 0x........ is 0 bytes inside global var "s_racy"

+declared at rwlock_race.c:18

 Conflicting store by thread x at 0x........ size 4

    at 0x........: thread_func (rwlock_race.c:?)

    by 0x........: vgDrd_thread_wrapper (drd_pthread_intercepts.c:?)

-Location 0x........ is 0 bytes inside local var "s_racy"

-declared at rwlock_race.c:18, in frame #? of thread x

+Location 0x........ is 0 bytes inside global var "s_racy"

+declared at rwlock_race.c:18

 Result: 2

diff --git a/drd/tests/sem_as_mutex.stderr.exp b/drd/tests/sem_as_mutex.stderr.exp

index 1646a6c..1fbd91a 100644

--- a/drd/tests/sem_as_mutex.stderr.exp

+++ b/drd/tests/sem_as_mutex.stderr.exp

@@ -1,8 +1,8 @@

 Conflicting load by thread 1 at 0x........ size 8

    at 0x........: main (sem_as_mutex.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at sem_as_mutex.c:25, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at sem_as_mutex.c:25

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

@@ -10,8 +10,8 @@ Other segment end (thread 2)

 Conflicting store by thread 1 at 0x........ size 8

    at 0x........: main (sem_as_mutex.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at sem_as_mutex.c:25, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at sem_as_mutex.c:25

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

diff --git a/drd/tests/sem_as_mutex3.stderr.exp b/drd/tests/sem_as_mutex3.stderr.exp

index 97b09a1..efd47ff 100644

--- a/drd/tests/sem_as_mutex3.stderr.exp

+++ b/drd/tests/sem_as_mutex3.stderr.exp

@@ -1,8 +1,8 @@

 Conflicting load by thread 1 at 0x........ size 8

    at 0x........: main (sem_as_mutex.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at sem_as_mutex.c:25, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at sem_as_mutex.c:25

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

diff --git a/drd/tests/sem_open.stderr.exp b/drd/tests/sem_open.stderr.exp

index 4e769e5..e926d05 100644

--- a/drd/tests/sem_open.stderr.exp

+++ b/drd/tests/sem_open.stderr.exp

@@ -1,8 +1,8 @@

 Conflicting load by thread 1 at 0x........ size 8

    at 0x........: main (sem_open.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at sem_open.c:25, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at sem_open.c:25

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

@@ -10,8 +10,8 @@ Other segment end (thread 2)

 Conflicting store by thread 1 at 0x........ size 8

    at 0x........: main (sem_open.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at sem_open.c:25, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at sem_open.c:25

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

diff --git a/drd/tests/sem_open3.stderr.exp b/drd/tests/sem_open3.stderr.exp

index 3c2d392..fb994f5 100644

--- a/drd/tests/sem_open3.stderr.exp

+++ b/drd/tests/sem_open3.stderr.exp

@@ -1,8 +1,8 @@

 Conflicting load by thread 1 at 0x........ size 8

    at 0x........: main (sem_open.c:?)

-Location 0x........ is 0 bytes inside local var "s_d3"

-declared at sem_open.c:25, in frame #? of thread 1

+Location 0x........ is 0 bytes inside global var "s_d3"

+declared at sem_open.c:25

 Other segment start (thread 2)

    (thread finished, call stack no longer available)

 Other segment end (thread 2)

diff --git a/helgrind/tests/hg03_inherit.stderr.exp b/helgrind/tests/hg03_inherit.stderr.exp

index 1c4a91e..ee21cf0 100644

--- a/helgrind/tests/hg03_inherit.stderr.exp

+++ b/helgrind/tests/hg03_inherit.stderr.exp

@@ -24,7 +24,7 @@ Locks held: none

    at 0x........: main (hg03_inherit.c:60)

 Location 0x........ is 0 bytes inside shared[1],

-declared at hg03_inherit.c:11, in frame #x of thread x

+a global variable declared at hg03_inherit.c:11

 ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)

diff --git a/helgrind/tests/hg04_race.stderr.exp b/helgrind/tests/hg04_race.stderr.exp

index 982f940..bf2a185 100644

--- a/helgrind/tests/hg04_race.stderr.exp

+++ b/helgrind/tests/hg04_race.stderr.exp

@@ -29,8 +29,8 @@ Locks held: none

    by 0x........: mythread_wrapper (hg_intercepts.c:...)

    ...

-Location 0x........ is 0 bytes inside local var "shared"

-declared at hg04_race.c:6, in frame #x of thread x

+Location 0x........ is 0 bytes inside global var "shared"

+declared at hg04_race.c:6

 ----------------------------------------------------------------

@@ -46,8 +46,8 @@ Locks held: none

    by 0x........: mythread_wrapper (hg_intercepts.c:...)

    ...

-Location 0x........ is 0 bytes inside local var "shared"

-declared at hg04_race.c:6, in frame #x of thread x

+Location 0x........ is 0 bytes inside global var "shared"

+declared at hg04_race.c:6

 ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)

diff --git a/helgrind/tests/rwlock_race.stderr.exp b/helgrind/tests/rwlock_race.stderr.exp

index 4a44713..47c3bd5 100644

--- a/helgrind/tests/rwlock_race.stderr.exp

+++ b/helgrind/tests/rwlock_race.stderr.exp

@@ -29,8 +29,8 @@ Locks held: none

    by 0x........: mythread_wrapper (hg_intercepts.c:...)

    ...

-Location 0x........ is 0 bytes inside local var "s_racy"

-declared at rwlock_race.c:18, in frame #x of thread x

+Location 0x........ is 0 bytes inside global var "s_racy"

+declared at rwlock_race.c:18

 Result: 2

diff --git a/helgrind/tests/tc21_pthonce.stderr.exp b/helgrind/tests/tc21_pthonce.stderr.exp

index 3e7d241..700b492 100644

--- a/helgrind/tests/tc21_pthonce.stderr.exp

+++ b/helgrind/tests/tc21_pthonce.stderr.exp

@@ -29,8 +29,8 @@ Locks held: none

    by 0x........: mythread_wrapper (hg_intercepts.c:...)

    ...

-Location 0x........ is 0 bytes inside local var "unprotected2"

-declared at tc21_pthonce.c:51, in frame #x of thread x

+Location 0x........ is 0 bytes inside global var "unprotected2"

+declared at tc21_pthonce.c:51

 ----------------------------------------------------------------

@@ -46,8 +46,8 @@ Locks held: none

    by 0x........: mythread_wrapper (hg_intercepts.c:...)

    ...

-Location 0x........ is 0 bytes inside local var "unprotected2"

-declared at tc21_pthonce.c:51, in frame #x of thread x

+Location 0x........ is 0 bytes inside global var "unprotected2"

+declared at tc21_pthonce.c:51

 ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)

diff --git a/memcheck/tests/varinfo3.stderr.exp b/memcheck/tests/varinfo3.stderr.exp

index d24ddb8..73130b7 100644

--- a/memcheck/tests/varinfo3.stderr.exp

+++ b/memcheck/tests/varinfo3.stderr.exp

@@ -3,7 +3,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: foo (varinfo3.c:54)

    by 0x........: main (varinfo3.c:66)

  Location 0x........ is 0 bytes inside static_global_def[1],

- declared at varinfo3.c:35, in frame #0 of thread 1

+ a global variable declared at varinfo3.c:35

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo3.c:28)

@@ -17,7 +17,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: foo (varinfo3.c:56)

    by 0x........: main (varinfo3.c:66)

  Location 0x........ is 0 bytes inside static_global_undef[3],

- declared at varinfo3.c:37, in frame #0 of thread 1

+ a global variable declared at varinfo3.c:37

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo3.c:28)

diff --git a/memcheck/tests/varinfo3.stderr.exp-ppc64 b/memcheck/tests/varinfo3.stderr.exp-ppc64

index e02a3c8..8dff370 100644

--- a/memcheck/tests/varinfo3.stderr.exp-ppc64

+++ b/memcheck/tests/varinfo3.stderr.exp-ppc64

@@ -3,7 +3,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: foo (varinfo3.c:54)

    by 0x........: main (varinfo3.c:66)

  Location 0x........ is 0 bytes inside static_global_def[1],

- declared at varinfo3.c:35, in frame #0 of thread 1

+ a global variable declared at varinfo3.c:35

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo3.c:29)

@@ -17,7 +17,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: foo (varinfo3.c:56)

    by 0x........: main (varinfo3.c:66)

  Location 0x........ is 0 bytes inside static_global_undef[3],

- declared at varinfo3.c:37, in frame #0 of thread 1

+ a global variable declared at varinfo3.c:37

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo3.c:29)

diff --git a/memcheck/tests/varinfo5.stderr.exp b/memcheck/tests/varinfo5.stderr.exp

index 3be0984..5fa9d97 100644

--- a/memcheck/tests/varinfo5.stderr.exp

+++ b/memcheck/tests/varinfo5.stderr.exp

@@ -83,7 +83,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: varinfo5_main (varinfo5so.c:156)

    by 0x........: main (varinfo5.c:5)

  Location 0x........ is 0 bytes inside static_global_def[1],

- declared at varinfo5so.c:87, in frame #0 of thread 1

+ a global variable declared at varinfo5so.c:87

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo5so.c:29)

@@ -101,7 +101,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: varinfo5_main (varinfo5so.c:156)

    by 0x........: main (varinfo5.c:5)

  Location 0x........ is 0 bytes inside static_global_undef[3],

- declared at varinfo5so.c:89, in frame #0 of thread 1

+ a global variable declared at varinfo5so.c:89

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo5so.c:29)

diff --git a/memcheck/tests/varinfo5.stderr.exp-ppc64 b/memcheck/tests/varinfo5.stderr.exp-ppc64

index db0c4fd..f5ebf0b 100644

--- a/memcheck/tests/varinfo5.stderr.exp-ppc64

+++ b/memcheck/tests/varinfo5.stderr.exp-ppc64

@@ -83,7 +83,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: varinfo5_main (varinfo5so.c:156)

    by 0x........: main (varinfo5.c:5)

  Location 0x........ is 0 bytes inside static_global_def[1],

- declared at varinfo5so.c:87, in frame #0 of thread 1

+ a global variable declared at varinfo5so.c:87

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo5so.c:30)

@@ -101,7 +101,7 @@ Uninitialised byte(s) found during client check request

    by 0x........: varinfo5_main (varinfo5so.c:156)

    by 0x........: main (varinfo5.c:5)

  Location 0x........ is 0 bytes inside static_global_undef[3],

- declared at varinfo5so.c:89, in frame #0 of thread 1

+ a global variable declared at varinfo5so.c:89

 Uninitialised byte(s) found during client check request

    at 0x........: croak (varinfo5so.c:30)

--- valgrind-3.8.1/coregrind/m_debuginfo/readdwarf3.c.orig	2012-08-17 08:59:56.000000000 +0200

+++ valgrind-3.8.1/coregrind/m_debuginfo/readdwarf3.c	2013-02-19 15:39:55.965382081 +0100

@@ -1853,7 +1853,7 @@

    if (dtag == DW_TAG_variable || dtag == DW_TAG_formal_parameter) {

       UChar* name        = NULL;

       UWord  typeR       = D3_INVALID_CUOFF;

-      Bool   external    = False;

+      Bool   global      = False;

       GExpr* gexpr       = NULL;

       Int    n_attrs     = 0;

       UWord  abs_ori     = (UWord)D3_INVALID_CUOFF;

@@ -1880,7 +1880,7 @@

             typeR = cook_die_using_form( cc, (UWord)cts, form );

          }

          if (attr == DW_AT_external && ctsSzB > 0 && cts > 0) {

-            external = True;

+            global = True;

          }

          if (attr == DW_AT_abstract_origin && ctsSzB > 0) {

             abs_ori = (UWord)cts;

@@ -1902,6 +1902,14 @@

             if (0) VG_(printf)("XXX filename = %s\n", fileName);

          }

       }

+      if (!global && dtag == DW_TAG_variable && level == 1) {

+         /* Case of a static variable. It is better to declare

+            it global as the variable is not really related to

+            a PC range, as its address can be used by program

+            counters outside of the ranges where it is visible . */

+         global = True;

+      }

+

       /* We'll collect it under if one of the following three

          conditions holds:

          (1) has location and type    -> completed

@@ -1927,7 +1935,7 @@

             this CU. */

          vg_assert(parser->sp >= 0);

-         /* If this is a local variable (non-external), try to find

+         /* If this is a local variable (non-global), try to find

             the GExpr for the DW_AT_frame_base of the containing

             function.  It should have been pushed on the stack at the

             time we encountered its DW_TAG_subprogram DIE, so the way

@@ -1939,7 +1947,7 @@

             if the containing DT_TAG_subprogram didn't supply a

             DW_AT_frame_base -- that's OK, but there must actually be

             a containing DW_TAG_subprogram. */

-         if (!external) {

+         if (!global) {

             Bool found = False;

             for (i = parser->sp; i >= 0; i--) {

                if (parser->isFunc[i]) {

@@ -1951,7 +1959,7 @@

             if (!found) {

                if (0 && VG_(clo_verbosity) >= 0) {

                   VG_(message)(Vg_DebugMsg, 

-                     "warning: parse_var_DIE: non-external variable "

+                     "warning: parse_var_DIE: non-global variable "

                      "outside DW_TAG_subprogram\n");

                }

                /* goto bad_DIE; */

@@ -1964,18 +1972,18 @@

             }

          }

-         /* re "external ? 0 : parser->sp" (twice), if the var is

-            marked 'external' then we must put it at the global scope,

+         /* re "global ? 0 : parser->sp" (twice), if the var is

+            marked 'global' then we must put it at the global scope,

             as only the global scope (level 0) covers the entire PC

             address space.  It is asserted elsewhere that level 0 

             always covers the entire address space. */

-         xa = parser->ranges[external ? 0 : parser->sp];

+         xa = parser->ranges[global ? 0 : parser->sp];

          nRanges = VG_(sizeXA)(xa);

          vg_assert(nRanges >= 0);

          tv = ML_(dinfo_zalloc)( "di.readdwarf3.pvD.1", sizeof(TempVar) );

          tv->name   = name;

-         tv->level  = external ? 0 : parser->sp;

+         tv->level  = global ? 0 : parser->sp;

          tv->typeR  = typeR;

          tv->gexpr  = gexpr;

          tv->fbGX   = fbGX;