[Bug gdb/18436] Can't print dynamically allocated global array

["stanton at haas dot berkeley.edu" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=18436

--- Comment #2 from stanton at haas dot berkeley.edu ---
Thanks for the response, Keith First, Iâm running OS X 10.10.3.

Test 1: MacPorts versions of gdb and gcc
gdb version = GNU gdb (GDB) 7.7.1
gcc version = gcc version 4.9.2 (MacPorts gcc49 4.9.2_1) 

(gdb) print vec[0]
cannot subscript something of type `<data variable, no debug info>'
(gdb) info var ^vec$
All variables matching regular expression "^vec$":

Non-debugging symbols:
0x0000000100001028  vec

Test 2: Same debugger, but Apple LLVM version 6.1.0 (clang-602.0.53) (based on
LLVM 3.6.0svn): same result.

Test 3: I just installed home-brew gdb 7.9 and tried the same test with the
Apple LLVM compiled code. Same result again.



> On May 20, 2015, at 9:34 AM, keiths at redhat dot com <sourceware-bugzilla@sourceware.org> wrote:
> 
> https://sourceware.org/bugzilla/show_bug.cgi?id=18436
> 
> Keith Seitz <keiths at redhat dot com> changed:
> 
>           What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                 CC|                            |keiths at redhat dot com
> 
> --- Comment #1 from Keith Seitz <keiths at redhat dot com> ---
> I tried your supplied test case on both the 7.9 branch and HEAD, and I was
> unable to reproduce it on Fedora 21, using the system compiler (4.9.2 20150212
> (Red Hat 4.9.2-6)).
> 
> What is your environment? gdb/gcc -v (or "show version" in gdb).
> What does "info var ^vec$" give?
> 
> For reference:
> 
> GNU gdb (GDB) 7.9
> Copyright (C) 2015 Free Software Foundation, Inc.
> [snip]
> Type "apropos word" to search for commands related to "word"...
> Reading symbols from /home/keiths/tmp/18436...done.
> (gdb) start
> Temporary breakpoint 1 at 0x4005d5: file /home/keiths/tmp/18436.c, line 10.
> Starting program: /home/keiths/tmp/18436 
> 
> Temporary breakpoint 1, main (argc=1, argv=0x7fffffffdb18)
>    at /home/keiths/tmp/18436.c:10
> 10          vec = (double *) malloc((unsigned) 10*sizeof(double));
> (gdb) n
> 12          for (i=0; i<10; i++) {
> (gdb) 
> 13              vec[i] = i;
> (gdb) 
> 14              printf("Item %d = %15.6g\n", i, vec[i]);
> (gdb) p vec[0]
> $1 = 0
> (gdb) info var ^vec$
> All variables matching regular expression "^vec$":
> 
> File /home/keiths/tmp/18436.c:
> double *vec;
> (gdb)
> 
> -- 
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