You only show one thread in your example. Did another thread have a valid stop reason? lldb shouldn’t be stopping for no reason anywhere…
Jim > On Mar 18, 2016, at 4:08 PM, Jeffrey Tan via lldb-dev > <lldb-dev@lists.llvm.org> wrote: > > Btw: the breakpoint I set is: > "b BigGrepMasterAsync.cpp:171" which is not in any of the stopped stack > frames. > > On Fri, Mar 18, 2016 at 3:47 PM, Jeffrey Tan <jeffrey.fu...@gmail.com > <mailto:jeffrey.fu...@gmail.com>> wrote: > Hi, > > Our IDE(wrapping lldb using python) works fine on Linux for simple hello > world cases. While trying a real world case, I found whenever we set a source > line breakpoint, then trigger the code path, lldb will send a stopped state > process event, with thread.GetStopReason() being None and with weird > callstack. Any ideas why do I get this stop stack(code is listed at the end)? > I have verified that if I do not set breakpoint and trigger the same code > path does not cause this stop event to generate. > > bt > * thread #1: tid = 952490, 0x00007fd7cb2daa83 libc.so.6`__GI_epoll_wait + 51, > name = 'biggrep_master_' > * frame #0: 0x00007fd7cb2daa83 libc.so.6`__GI_epoll_wait + 51 > frame #1: 0x000000000271189f > biggrep_master_server_async`epoll_dispatch(base=0x00007fd7ca970800, > arg=0x00007fd7ca62c1e0, tv=<unavailable>) + 127 at epoll.c:315 > frame #2: 0x000000000270f6d1 > biggrep_master_server_async`event_base_loop(base=0x00007fd7ca970800, > flags=<unavailable>) + 225 at event.c:524 > frame #3: 0x00000000025f9378 > biggrep_master_server_async`folly::EventBase::loopBody(this=0x00007fd7ca945180, > flags=0) + 834 at EventBase.cpp:335 > frame #4: 0x00000000025f900b > biggrep_master_server_async`folly::EventBase::loop(this=0x00007fd7ca945180) + > 29 at EventBase.cpp:287 > frame #5: 0x00000000025fa053 > biggrep_master_server_async`folly::EventBase::loopForever(this=0x00007fd7ca945180) > + 109 at EventBase.cpp:435 > frame #6: 0x0000000001e24b72 > biggrep_master_server_async`apache::thrift::ThriftServer::serve(this=0x00007fd7ca96d710) > + 110 at ThriftServer.cpp:365 > frame #7: 0x00000000004906bc > biggrep_master_server_async`facebook::services::ServiceFramework::startFramework(this=0x00007ffc06776140, > waitUntilStop=true) + 1942 at ServiceFramework.cpp:885 > frame #8: 0x000000000048fe6d > biggrep_master_server_async`facebook::services::ServiceFramework::go(this=0x00007ffc06776140, > waitUntilStop=true) + 35 at ServiceFramework.cpp:775 > frame #9: 0x00000000004219a7 biggrep_master_server_async`main(argc=1, > argv=0x00007ffc067769d8) + 2306 at BigGrepMasterServerAsync.cpp:134 > frame #10: 0x00007fd7cb1ed0f6 libc.so.6`__libc_start_main + 246 > frame #11: 0x0000000000420bfc biggrep_master_server_async`_start + 41 at > start.S:122 > > Here is the code snippet of handling code: > def _handle_process_event(self, event): > # Ignore non-stopping events. > if lldb.SBProcess.GetRestartedFromEvent(event): > log_debug('Non stopping event: %s' % str(event)) > return > > process = lldb.SBProcess.GetProcessFromEvent(event) > if process.state == lldb.eStateStopped: > self._send_paused_notification(process) > elif process.state == lldb.eStateExited: > exit_message = 'Process(%d) exited with: %u' % ( > process.GetProcessID(), > process.GetExitStatus()) > if process.GetExitDescription(): > exit_message += (', ' + process.GetExitDescription()) > self._send_user_output('log', exit_message) > self.should_quit = True > else: > self._send_notification('Debugger.resumed', None) > > event_type = event.GetType() > if event_type == lldb.SBProcess.eBroadcastBitSTDOUT: > # Read stdout from inferior. > process_output = '' > while True: > output_part = process.GetSTDOUT(1024) > if not output_part or len(output_part) == 0: > break > process_output += output_part > self._send_user_output('log', process_output) > > _______________________________________________ > lldb-dev mailing list > lldb-dev@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev
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