gdb and binutils branch master updated. a594760181bc3859df1f19e3cca361ad7d031bd9

[sergiodj at sourceware dot org]

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=a594760181bc3859df1f19e3cca361ad7d031bd9

commit a594760181bc3859df1f19e3cca361ad7d031bd9
Author: Sergio Durigan Junior <sergiodj@redhat.com>
Date:   Tue Sep 16 22:54:03 2014 -0400

    Add test for global variable that is nested by another DSO
    
    This is just a testcase addition that I am proposing for upstream GDB.
    We have this in our internal tree, and the related RH bug is:
    
      <https://bugzilla.redhat.com/show_bug.cgi?id=809179>
    
    (You might not be able to see all the comments without privileges.)
    
    This bug is about a global variable that got incorrectly displayed by
    GDB.  This bug has already been fixed a long time ago by Joel's
    commit:
    
      commit 19630284f570790ebf6d50bfb43caa1f125ee88a
      Author: Joel Brobecker <brobecker@gnat.com>
      Date:   Tue Jun 5 13:50:50 2012 +0000
    
    But I think a testcase for it wouldn't hurt.
    
    So, consider the following scenario:
    
      $ cat solib1.c
      int test;
      void c_main (void)
      {
        test = 42;
      }
    
      $ cat solib2.c
      int test;
      void b_main (void)
      {
        test = 42;
      }
    
      $ cat main.c
      int main (int argc, char *argv[])
      {
        c_main ();
        b_main ();
        return 0;
      }
    
      $ gcc -g -fPIC -shared -o libSO1.so -c solib1.c
      $ gcc -g -fPIC -shared -o libSO2.so -c solib2.c
      $ gcc -g -o main -L$PWD -lSO1 -lSO2 main.c
      $ LD_LIBRARY_PATH=. gdb -q -batch -ex 'b c_main' -ex r -ex n -ex 'p test' ./main
      ...
      $1 = 0
    
    This happened with GDB before Joel's commit above.  Now, things work
    and GDB is able to correctly display the nested global variable:
    
      $ LD_LIBRARY_PATH=. gdb -q -batch -ex 'b c_main' -ex r -ex n -ex 'p test' ./main
      ...
      $1 = 42
    
    The testcase attached tests this behavior.
    
    gdb/testsuite/ChangeLog:
    2014-09-16  Sergio Durigan Junior  <sergiodj@redhat.com>
    
    	* gdb.base/global-var-nested-by-dso-solib1.c: New file.
    	* gdb.base/global-var-nested-by-dso-solib2.c: Likewise.
    	* gdb.base/global-var-nested-by-dso.c: Likewise.
    	* gdb.base/global-var-nested-by-dso.exp: Likewise.

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

Summary of changes:
 gdb/testsuite/ChangeLog                            |    7 +++
 .../gdb.base/global-var-nested-by-dso-solib1.c     |   24 +++++++++
 .../gdb.base/global-var-nested-by-dso-solib2.c     |   24 +++++++++
 gdb/testsuite/gdb.base/global-var-nested-by-dso.c  |   24 +++++++++
 .../gdb.base/global-var-nested-by-dso.exp          |   55 ++++++++++++++++++++
 5 files changed, 134 insertions(+), 0 deletions(-)
 create mode 100644 gdb/testsuite/gdb.base/global-var-nested-by-dso-solib1.c
 create mode 100644 gdb/testsuite/gdb.base/global-var-nested-by-dso-solib2.c
 create mode 100644 gdb/testsuite/gdb.base/global-var-nested-by-dso.c
 create mode 100644 gdb/testsuite/gdb.base/global-var-nested-by-dso.exp


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