darchons / android-gdb Goto Github PK

We have a fork that adds in Objective-C support (although a bit hacky in places) at https://github.com/apportable/gdb. Let me know if you'd like a pull request.

For example,

(gdb) call (int)getpid()

The native libs on the Nexus 9 appear to be 64-bit. Or at least some of them. And this confuses jimdb currently. When attaching, I get:

gdb.error: "/Users/snorp/source/jimdb-arm/lib/HT4BAJT01519/system/bin/app_process": not in executable format: File format not recognized
/Users/snorp/source/jimdb-arm/bin/../utils/gdbinit:136: Error in sourced command file:
Error occurred in Python command: "/Users/snorp/source/jimdb-arm/lib/HT4BAJT01519/system/bin/app_process": not in executable format: File format not recognized

And indeed, app_process is 64-bit.

$ file lib/HT4BAJT01519/system/bin/app_process
lib/HT4BAJT01519/system/bin/app_process: ELF 64-bit LSB shared object, version 1 (SYSV), dynamically linked (uses shared libs), stripped

Seems like not all target threads are stopped when gdbserver attaches. Need to investigate.

Sometimes when doing operations on symbols I get crashes in lookup_objfile_from_block() on symtab.c:1260

The BLOCKVECTOR on struct symtab *s is NULL which is presumably the cause of the crash.

The filename for the symtab in question is nsIRedirectChannelRegistrar.h

When I run moz-gdb/bin/gdb on my Ubuntu 12.04 machine, with a Galaxy S device connected, I get:

GNU gdb (GDB) 7.3-android-github.com/darchons
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=x86_64-unknown-linux-gnu --target=arm-elf-linux".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
New ADB device is "I897e057faf6"
Using device I897e057faf6
Using object directory: /hack/mozilla-central/obj-mobile-debug
Set sysroot to "/hack/moz-gdb/lib/I897e057faf6".
Updated solib-search-path.
Using package org.mozilla.fennec_bjacob.
Done
Attaching to parent (pid 5465)... as non-root... 

/hack/moz-gdb/bin/../utils/gdbinit:68: Error in sourced command file:
gdbserver exited unexpectedly

This line 68 in gdbinit is where we run feninit. Same problem when running gdbserver and feninit manually.

This problem was reproduced with the same phone on another PC. On the same PCs, other phones work fine with moz-gdb.

Also, this Galaxy S phone does have gdbserver, and running it manually seem to work fine by itself.