scripts: add 'qemu coroutine' command to qemu-gdb.py

Enterprise / Virtualization / QEMU - Stefan Hajnoczi [redhat.com] - 28 April 2015 08:36 UTC

The 'qemu coroutine ' GDB command prints the backtrace for a CoroutineUContext. This is useful for peeking inside yielded coroutines that are waiting for file descriptor events, timers, etc.

For example:

$ gdb tests/test-coroutine (gdb) b test_yield (gdb) r (gdb) b qemu_coroutine_enter (gdb) c (gdb) c Continuing.

Breakpoint 2, qemu_coroutine_enter (co=0x555555c66520, opaque=0x0) at qemu-coroutine.c:103 103 { (gdb) source scripts/qemu-gdb.py (gdb) qemu coroutine 0x555555c66520 #0 0x000055555557a740 in qemu_coroutine_switch (from_=, to_=0x7ffff7f90a70, action=COROUTINE_YIELD) at coroutine-ucontext.c:177 #1 0x0000555555566af9 in yield_5_times (opaque=0x7fffffffdbb7) at tests/test-coroutine.c:107 #2 0x000055555557a7aa in coroutine_trampoline (i0=, i1=) at coroutine-ucontext.c:80 #3 0x00007ffff08de000 in __start_context () at /lib64/libc.so.6

9eddd6a scripts: add 'qemu coroutine' command to qemu-gdb.py
scripts/qemu-gdb.py | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 75 insertions(+)

Upstream: git.qemu.org

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