Commit a201b0ff authored by Paolo Bonzini's avatar Paolo Bonzini Committed by Stefan Hajnoczi
Browse files

qemu-gdb: add $qemu_coroutine_sp and $qemu_coroutine_pc 



These can be useful to manually get a stack trace of a coroutine inside
a core dump.

Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Message-id: 1444636974-19950-4-git-send-email-pbonzini@redhat.com
Signed-off-by: default avatarStefan Hajnoczi <stefanha@redhat.com>
parent 80ab31b2

scripts/qemu-gdb.py

+3 −0
Original line number Diff line number Diff line
@@ -38,6 +38,9 @@ QemuCommand() 
coroutine.CoroutineCommand()

mtree.MtreeCommand()



coroutine.CoroutineSPFunction()

coroutine.CoroutinePCFunction()



# Default to silently passing through SIGUSR1, because QEMU sends it

# to itself a lot.

gdb.execute('handle SIGUSR1 pass noprint nostop')

scripts/qemugdb/coroutine.py

+16 −0
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@ 


import gdb



VOID_PTR = gdb.lookup_type('void').pointer()



def get_fs_base():

    '''Fetch %fs base value using arch_prctl(ARCH_GET_FS).  This is

       pthread_self().'''
@@ -101,3 +103,17 @@ class CoroutineCommand(gdb.Command): 
            return



        bt_jmpbuf(coroutine_to_jmpbuf(gdb.parse_and_eval(argv[0])))



class CoroutineSPFunction(gdb.Function):

    def __init__(self):

        gdb.Function.__init__(self, 'qemu_coroutine_sp')



    def invoke(self, addr):

        return get_jmpbuf_regs(coroutine_to_jmpbuf(addr))['rsp'].cast(VOID_PTR)



class CoroutinePCFunction(gdb.Function):

    def __init__(self):

        gdb.Function.__init__(self, 'qemu_coroutine_pc')



    def invoke(self, addr):

        return get_jmpbuf_regs(coroutine_to_jmpbuf(addr))['rip'].cast(VOID_PTR)