tree 9d57f566145dddc97b039b5191b6ad93a7b0abf6
parent 9949cc7ca2192941a340a8dc7218a19b93f0bc55
author Andrew Jeffery <andrew@aj.id.au> 1641877952 +1030
committer Andrew Jeffery <andrew@aj.id.au> 1641887117 +1030

bbdbg: Debug a target environment generated by bitbake

bbdbg does the legwork to give you a gdb instance tailored for a target
environment generated from a local bitbake build tree. This saves
the time otherwise spent by building and installing an SDK for the same.

Documentation:

```
3 15:52:42 andrew@mistburn:~/src/openbmc/openbmc-tools/bbdbg (bbdbg) $ ./bbdbg
./bbdbg: 26: 1: parameter not set
NAME
        bbdbg - debug applications in a target environment built by bitbake

SYNOPSIS
        bbdbg PATH FILE CORE PACKAGES

DESCRIPTION
        PATH is the path to the root of a bitbake build directory
        FILE is the absolute path to the binary of interest in the target environment
        CORE is an optional core file generated by FILE. Pass '-' for no core file
        PACKAGES will be used to populate a temporary rootfs for debugging FILE

EXAMPLE
        bbdbg ~/src/openbmc/openbmc/build/p10bmc \
                /usr/bin/nvmesensor - \
                dbus-sensors dbus-sensors-dbg
```

Example use:

```
3 15:50:40 andrew@mistburn:~/src/openbmc/openbmc-tools/bbdbg (bbdbg) $ ./bbdbg ~/src/openbmc/openbmc/build/p10bmc /usr/bin/nvmesensor obmcdump_3_1641877435/core.nvmesensor.0.db0e4de236a6448e9005e85a0dffb348.1554.1641877432000000 dbus-sensors dbus-sensors-dbg
+ bbdbg_opkg update
+ LD_LIBRARY_PATH=/home/andrew/src/openbmc/openbmc/build/p10bmc/tmp/sysroots-components/x86_64/libsolv-native/usr/lib /home/andrew/src/openbmc/openbmc/build/p10bmc/tmp/sysroots-components/x86_64/opkg-native/usr/bin/opkg -V0 -f /home/andrew/src/openbmc/openbmc/build/p10bmc/tmp/work/p10bmc-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/opkg.conf -o /tmp/bbdbg.375 update
+ bbdbg_opkg install dbus-sensors dbus-sensors-dbg
+ LD_LIBRARY_PATH=/home/andrew/src/openbmc/openbmc/build/p10bmc/tmp/sysroots-components/x86_64/libsolv-native/usr/lib /home/andrew/src/openbmc/openbmc/build/p10bmc/tmp/sysroots-components/x86_64/opkg-native/usr/bin/opkg -V0 -f /home/andrew/src/openbmc/openbmc/build/p10bmc/tmp/work/p10bmc-openbmc-linux-gnueabi/obmc-phosphor-image/1.0-r0/opkg.conf -o /tmp/bbdbg.375 install dbus-sensors dbus-sensors-dbg
+ [ - = obmcdump_3_1641877435/core.nvmesensor.0.db0e4de236a6448e9005e85a0dffb348.1554.1641877432000000 ]
+ echo obmcdump_3_1641877435/core.nvmesensor.0.db0e4de236a6448e9005e85a0dffb348.1554.1641877432000000
+ gdb-multiarch -q -iex set solib-absolute-prefix /tmp/bbdbg.375 -iex add-auto-load-safe-path /tmp/bbdbg.375 /tmp/bbdbg.375/usr/bin/nvmesensor obmcdump_3_1641877435/core.nvmesensor.0.db0e4de236a6448e9005e85a0dffb348.1554.1641877432000000
Reading symbols from /tmp/bbdbg.375/usr/bin/nvmesensor...
Reading symbols from /tmp/bbdbg.375/usr/bin/.debug/nvmesensor...
[New LWP 1554]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/bin/nvmesensor'.
Program terminated with signal SIGSEGV, Segmentation fault.
 #0  0x76b88f50 in epoll_wait (epfd=<optimised out>, events=0x7edf1478, maxevents=128, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
30      ../sysdeps/unix/sysv/linux/epoll_wait.c: No such file or directory.
(gdb) bt
 #0  0x76b88f50 in epoll_wait (epfd=<optimised out>, events=0x7edf1478, maxevents=128, timeout=-1) at ../sysdeps/unix/sysv/linux/epoll_wait.c:30
 #1  0x0044adf4 in boost::asio::detail::epoll_reactor::run (ops=..., usec=<optimised out>, this=<optimised out>) at /usr/include/boost/asio/detail/impl/epoll_reactor.ipp:501
 #2  boost::asio::detail::scheduler::do_run_one (ec=..., this_thread=..., lock=<synthetic pointer>..., this=0x17b1ea8) at /usr/include/boost/asio/detail/impl/scheduler.ipp:470
 #3  boost::asio::detail::scheduler::run (ec=..., this=0x17b1ea8) at /usr/include/boost/asio/detail/impl/scheduler.ipp:204
 #4  boost::asio::io_context::run (this=0x7edf1234, this=0x7edf1234) at /usr/include/boost/asio/impl/io_context.ipp:63
 #5  main () at ../../../../../../workspace/sources/dbus-sensors/src/NVMeSensorMain.cpp:274
(gdb) quit
+ set +x
3 15:51:10 andrew@mistburn:~/src/openbmc/openbmc-tools/bbdbg (bbdbg) $
```

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I82f5872742253351c7ac8d25b479ac8194e07afd