Add gdbinit to tools/ directory.

Add gdbinit to tools/ directory.

Suggested usage: echo "source /path/to/v8/tools/gdbinit" >> ~/.gdbinit

R=mstarzinger@chromium.org

Committed: https://code.google.com/p/v8/source/detail?r=22252

[Michael Starzinger, 2014-07-07 16:14:30]

LGTM with suggestions.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit
File tools/gdbinit (right):

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode4
tools/gdbinit:4: 
nit: I have this comment in my file, maybe it's helpful, your call.

# Additional V8 command: Print objects contents.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode12
tools/gdbinit:12: 
# Additional V8 command: Print code object containing given PC.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode20
tools/gdbinit:20: 
# Additional V8 command: Print stack trace.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode27
tools/gdbinit:27: end
nit: Maybe add an empty newline to separate the last two commands.

[Jakob Kummerow, 2014-07-07 16:21:19]

Thanks, landing.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit
File tools/gdbinit (right):

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode4
tools/gdbinit:4: 
On 2014/07/07 16:14:30, Michael Starzinger wrote:
> nit: I have this comment in my file, maybe it's helpful, your call.
> 
> # Additional V8 command: Print objects contents.

Done.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode12
tools/gdbinit:12: 
On 2014/07/07 16:14:30, Michael Starzinger wrote:
> # Additional V8 command: Print code object containing given PC.

Done.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode20
tools/gdbinit:20: 
On 2014/07/07 16:14:29, Michael Starzinger wrote:
> # Additional V8 command: Print stack trace.

Done.

https://codereview.chromium.org/375503009/diff/40001/tools/gdbinit#newcode27
tools/gdbinit:27: end
On 2014/07/07 16:14:30, Michael Starzinger wrote:
> nit: Maybe add an empty newline to separate the last two commands.

Done.

[Jakob Kummerow, 2014-07-07 16:21:41]

Committed patchset #3 manually as r22252 (presubmit successful).