@@ -40,6 +40,7 @@ timers.TimersCommand()
coroutine.CoroutineSPFunction()
coroutine.CoroutinePCFunction()
+coroutine.CoroutineBt()
# Default to silently passing through SIGUSR1, because QEMU sends it
# to itself a lot.
@@ -88,8 +88,11 @@ def bt_jmpbuf(jmpbuf):
selected_frame.select()
+def co_cast(co):
+ return co.cast(gdb.lookup_type('CoroutineUContext').pointer())
+
def coroutine_to_jmpbuf(co):
- coroutine_pointer = co.cast(gdb.lookup_type('CoroutineUContext').pointer())
+ coroutine_pointer = co_cast(co)
return coroutine_pointer['env']['__jmpbuf']
@@ -107,6 +110,33 @@ class CoroutineCommand(gdb.Command):
bt_jmpbuf(coroutine_to_jmpbuf(gdb.parse_and_eval(argv[0])))
+class CoroutineBt(gdb.Command):
+ '''Display backtrace including coroutine switches'''
+ def __init__(self):
+ gdb.Command.__init__(self, 'qemu bt', gdb.COMMAND_STACK,
+ gdb.COMPLETE_NONE)
+
+ def invoke(self, arg, from_tty):
+
+ gdb.execute("bt")
+
+ thread = gdb.selected_thread()
+ if thread == None or not thread.is_stopped():
+ raise gdb.GdbError("No currrent thread")
+
+ if gdb.parse_and_eval("qemu_in_coroutine()") == False:
+ return
+
+ co_ptr = gdb.parse_and_eval("qemu_coroutine_self()")
+ gdb.write("Coroutine at " + str(co_ptr) + ":\n")
+
+ while True:
+ co = co_cast(co_ptr)
+ co_ptr = co["base"]["caller"]
+ if co_ptr == 0:
+ break
+ bt_jmpbuf(coroutine_to_jmpbuf(co_ptr))
+
class CoroutineSPFunction(gdb.Function):
def __init__(self):
gdb.Function.__init__(self, 'qemu_coroutine_sp')
This script first runs the regular gdb's 'bt' command, and then if we are in a coroutine it prints the coroutines backtraces in the order in which they were called. Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> --- scripts/qemu-gdb.py | 1 + scripts/qemugdb/coroutine.py | 32 +++++++++++++++++++++++++++++++- 2 files changed, 32 insertions(+), 1 deletion(-)