64f47c1e58
In certain occasions times, like when LLDB is initializing and evaluating the .lldbinit files, it tries to print to stderr and stdout directly. This confuses the IDE with malformed data, as it talks to lldb-vscode using stdin and stdout following the JSON RPC protocol. This ends up terminating the debug session with the user unaware of what's going on. There might be other situations in which this can happen, and they will be harder to debug than the .lldbinit case. After several discussions with @clayborg, @yinghuitan and @aadsm, we realized that the best course of action is to simply redirect stdout and stderr to the console, without modifying LLDB itself. This will prove to be resilient to future bugs or features. I made the simplest possible redirection logic I could come up with. It only works for POSIX, and to make it work with Windows should be merely changing pipe and dup2 for the windows equivalents like _pipe and _dup2. Sadly I don't have a Windows machine, so I'll do it later once my office reopens, or maybe someone else can do it. I'm intentionally not adding a stop-redirecting logic, as I don't see it useful for the lldb-vscode case (why would we want to do that, really?). I added a test. Note: this is a simpler version of D80659. I first tried to implement a RIIA version of it, but it was problematic to manage the state of the thread and reverting the redirection came with some non trivial complexities, like what to do with unflushed data after the debug session has finished on the IDE's side.
360 lines
16 KiB
Python
360 lines
16 KiB
Python
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from lldbsuite.test.lldbtest import *
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import os
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import vscode
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import time
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class VSCodeTestCaseBase(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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def create_debug_adaptor(self, lldbVSCodeEnv=None):
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'''Create the Visual Studio Code debug adaptor'''
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self.assertTrue(os.path.exists(self.lldbVSCodeExec),
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'lldb-vscode must exist')
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log_file_path = self.getBuildArtifact('vscode.txt')
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self.vscode = vscode.DebugAdaptor(
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executable=self.lldbVSCodeExec, init_commands=self.setUpCommands(),
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log_file=log_file_path, env=lldbVSCodeEnv)
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def build_and_create_debug_adaptor(self, lldbVSCodeEnv=None):
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self.build()
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self.create_debug_adaptor(lldbVSCodeEnv)
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def set_source_breakpoints(self, source_path, lines, condition=None,
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hitCondition=None):
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'''Sets source breakpoints and returns an array of strings containing
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the breakpoint IDs ("1", "2") for each breakpoint that was set.
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'''
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response = self.vscode.request_setBreakpoints(
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source_path, lines, condition=condition, hitCondition=hitCondition)
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if response is None:
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return []
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breakpoints = response['body']['breakpoints']
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breakpoint_ids = []
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for breakpoint in breakpoints:
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breakpoint_ids.append('%i' % (breakpoint['id']))
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return breakpoint_ids
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def set_function_breakpoints(self, functions, condition=None,
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hitCondition=None):
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'''Sets breakpoints by function name given an array of function names
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and returns an array of strings containing the breakpoint IDs
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("1", "2") for each breakpoint that was set.
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'''
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response = self.vscode.request_setFunctionBreakpoints(
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functions, condition=condition, hitCondition=hitCondition)
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if response is None:
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return []
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breakpoints = response['body']['breakpoints']
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breakpoint_ids = []
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for breakpoint in breakpoints:
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breakpoint_ids.append('%i' % (breakpoint['id']))
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return breakpoint_ids
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def waitUntil(self, condition_callback):
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for _ in range(20):
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if condition_callback():
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return True
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time.sleep(0.5)
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return False
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def verify_breakpoint_hit(self, breakpoint_ids):
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'''Wait for the process we are debugging to stop, and verify we hit
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any breakpoint location in the "breakpoint_ids" array.
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"breakpoint_ids" should be a list of breakpoint ID strings
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(["1", "2"]). The return value from self.set_source_breakpoints()
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or self.set_function_breakpoints() can be passed to this function'''
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stopped_events = self.vscode.wait_for_stopped()
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for stopped_event in stopped_events:
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if 'body' in stopped_event:
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body = stopped_event['body']
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if 'reason' not in body:
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continue
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if body['reason'] != 'breakpoint':
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continue
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if 'description' not in body:
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continue
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# Descriptions for breakpoints will be in the form
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# "breakpoint 1.1", so look for any description that matches
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# ("breakpoint 1.") in the description field as verification
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# that one of the breakpoint locations was hit. VSCode doesn't
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# allow breakpoints to have multiple locations, but LLDB does.
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# So when looking at the description we just want to make sure
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# the right breakpoint matches and not worry about the actual
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# location.
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description = body['description']
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print("description: %s" % (description))
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for breakpoint_id in breakpoint_ids:
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match_desc = 'breakpoint %s.' % (breakpoint_id)
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if match_desc in description:
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return
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self.assertTrue(False, "breakpoint not hit")
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def verify_exception_breakpoint_hit(self, filter_label):
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'''Wait for the process we are debugging to stop, and verify the stop
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reason is 'exception' and that the description matches
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'filter_label'
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'''
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stopped_events = self.vscode.wait_for_stopped()
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for stopped_event in stopped_events:
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if 'body' in stopped_event:
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body = stopped_event['body']
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if 'reason' not in body:
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continue
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if body['reason'] != 'exception':
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continue
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if 'description' not in body:
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continue
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description = body['description']
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if filter_label == description:
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return True
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return False
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def verify_commands(self, flavor, output, commands):
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self.assertTrue(output and len(output) > 0, "expect console output")
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lines = output.splitlines()
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prefix = '(lldb) '
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for cmd in commands:
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found = False
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for line in lines:
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if line.startswith(prefix) and cmd in line:
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found = True
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break
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self.assertTrue(found,
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"verify '%s' found in console output for '%s'" % (
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cmd, flavor))
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def get_dict_value(self, d, key_path):
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'''Verify each key in the key_path array is in contained in each
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dictionary within "d". Assert if any key isn't in the
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corresponding dictionary. This is handy for grabbing values from VS
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Code response dictionary like getting
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response['body']['stackFrames']
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'''
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value = d
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for key in key_path:
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if key in value:
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value = value[key]
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else:
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self.assertTrue(key in value,
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'key "%s" from key_path "%s" not in "%s"' % (
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key, key_path, d))
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return value
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def get_stackFrames_and_totalFramesCount(self, threadId=None, startFrame=None,
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levels=None, dump=False):
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response = self.vscode.request_stackTrace(threadId=threadId,
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startFrame=startFrame,
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levels=levels,
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dump=dump)
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if response:
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stackFrames = self.get_dict_value(response, ['body', 'stackFrames'])
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totalFrames = self.get_dict_value(response, ['body', 'totalFrames'])
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self.assertTrue(totalFrames > 0,
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'verify totalFrames count is provided by extension that supports '
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'async frames loading')
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return (stackFrames, totalFrames)
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return (None, 0)
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def get_stackFrames(self, threadId=None, startFrame=None, levels=None,
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dump=False):
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(stackFrames, totalFrames) = self.get_stackFrames_and_totalFramesCount(
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threadId=threadId,
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startFrame=startFrame,
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levels=levels,
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dump=dump)
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return stackFrames
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def get_source_and_line(self, threadId=None, frameIndex=0):
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stackFrames = self.get_stackFrames(threadId=threadId,
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startFrame=frameIndex,
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levels=1)
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if stackFrames is not None:
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stackFrame = stackFrames[0]
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['source', 'path']
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if 'source' in stackFrame:
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source = stackFrame['source']
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if 'path' in source:
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if 'line' in stackFrame:
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return (source['path'], stackFrame['line'])
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return ('', 0)
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def get_stdout(self, timeout=0.0):
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return self.vscode.get_output('stdout', timeout=timeout)
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def get_console(self, timeout=0.0):
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return self.vscode.get_output('console', timeout=timeout)
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def collect_console(self, duration):
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return self.vscode.collect_output('console', duration=duration)
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def get_local_as_int(self, name, threadId=None):
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value = self.vscode.get_local_variable_value(name, threadId=threadId)
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if value.startswith('0x'):
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return int(value, 16)
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elif value.startswith('0'):
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return int(value, 8)
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else:
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return int(value)
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def set_local(self, name, value, id=None):
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'''Set a top level local variable only.'''
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return self.vscode.request_setVariable(1, name, str(value), id=id)
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def set_global(self, name, value, id=None):
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'''Set a top level global variable only.'''
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return self.vscode.request_setVariable(2, name, str(value), id=id)
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def stepIn(self, threadId=None, waitForStop=True):
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self.vscode.request_stepIn(threadId=threadId)
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if waitForStop:
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return self.vscode.wait_for_stopped()
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return None
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def stepOver(self, threadId=None, waitForStop=True):
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self.vscode.request_next(threadId=threadId)
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if waitForStop:
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return self.vscode.wait_for_stopped()
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return None
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def stepOut(self, threadId=None, waitForStop=True):
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self.vscode.request_stepOut(threadId=threadId)
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if waitForStop:
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return self.vscode.wait_for_stopped()
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return None
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def continue_to_next_stop(self):
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self.vscode.request_continue()
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return self.vscode.wait_for_stopped()
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def continue_to_breakpoints(self, breakpoint_ids):
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self.vscode.request_continue()
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self.verify_breakpoint_hit(breakpoint_ids)
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def continue_to_exception_breakpoint(self, filter_label):
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self.vscode.request_continue()
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self.assertTrue(self.verify_exception_breakpoint_hit(filter_label),
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'verify we got "%s"' % (filter_label))
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def continue_to_exit(self, exitCode=0):
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self.vscode.request_continue()
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stopped_events = self.vscode.wait_for_stopped()
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self.assertEquals(len(stopped_events), 1,
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"stopped_events = {}".format(stopped_events))
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self.assertEquals(stopped_events[0]['event'], 'exited',
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'make sure program ran to completion')
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self.assertEquals(stopped_events[0]['body']['exitCode'], exitCode,
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'exitCode == %i' % (exitCode))
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def attach(self, program=None, pid=None, waitFor=None, trace=None,
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initCommands=None, preRunCommands=None, stopCommands=None,
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exitCommands=None, attachCommands=None, coreFile=None,
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disconnectAutomatically=True, terminateCommands=None,
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postRunCommands=None):
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'''Build the default Makefile target, create the VSCode debug adaptor,
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and attach to the process.
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'''
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# Make sure we disconnect and terminate the VSCode debug adaptor even
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# if we throw an exception during the test case.
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def cleanup():
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if disconnectAutomatically:
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self.vscode.request_disconnect(terminateDebuggee=True)
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self.vscode.terminate()
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# Execute the cleanup function during test case tear down.
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self.addTearDownHook(cleanup)
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# Initialize and launch the program
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self.vscode.request_initialize()
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response = self.vscode.request_attach(
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program=program, pid=pid, waitFor=waitFor, trace=trace,
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initCommands=initCommands, preRunCommands=preRunCommands,
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stopCommands=stopCommands, exitCommands=exitCommands,
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attachCommands=attachCommands, terminateCommands=terminateCommands,
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coreFile=coreFile, postRunCommands=postRunCommands)
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if not (response and response['success']):
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self.assertTrue(response['success'],
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'attach failed (%s)' % (response['message']))
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def launch(self, program=None, args=None, cwd=None, env=None,
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stopOnEntry=False, disableASLR=True,
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disableSTDIO=False, shellExpandArguments=False,
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trace=False, initCommands=None, preRunCommands=None,
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stopCommands=None, exitCommands=None, terminateCommands=None,
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sourcePath=None, debuggerRoot=None, launchCommands=None,
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sourceMap=None, disconnectAutomatically=True, runInTerminal=False,
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expectFailure=False, postRunCommands=None):
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'''Sending launch request to vscode
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'''
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# Make sure we disconnect and terminate the VSCode debug adapter,
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# if we throw an exception during the test case
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def cleanup():
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if disconnectAutomatically:
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self.vscode.request_disconnect(terminateDebuggee=True)
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self.vscode.terminate()
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# Execute the cleanup function during test case tear down.
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self.addTearDownHook(cleanup)
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# Initialize and launch the program
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self.vscode.request_initialize()
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response = self.vscode.request_launch(
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program,
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args=args,
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cwd=cwd,
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env=env,
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stopOnEntry=stopOnEntry,
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disableASLR=disableASLR,
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disableSTDIO=disableSTDIO,
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shellExpandArguments=shellExpandArguments,
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trace=trace,
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initCommands=initCommands,
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preRunCommands=preRunCommands,
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stopCommands=stopCommands,
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exitCommands=exitCommands,
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terminateCommands=terminateCommands,
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sourcePath=sourcePath,
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debuggerRoot=debuggerRoot,
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launchCommands=launchCommands,
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sourceMap=sourceMap,
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runInTerminal=runInTerminal,
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expectFailure=expectFailure,
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postRunCommands=postRunCommands)
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if expectFailure:
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return response
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if not (response and response['success']):
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self.assertTrue(response['success'],
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'launch failed (%s)' % (response['message']))
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# We need to trigger a request_configurationDone after we've successfully
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# attached a runInTerminal process to finish initialization.
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if runInTerminal:
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self.vscode.request_configurationDone()
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return response
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def build_and_launch(self, program, args=None, cwd=None, env=None,
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stopOnEntry=False, disableASLR=True,
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disableSTDIO=False, shellExpandArguments=False,
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trace=False, initCommands=None, preRunCommands=None,
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stopCommands=None, exitCommands=None,
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terminateCommands=None, sourcePath=None,
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debuggerRoot=None, runInTerminal=False,
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disconnectAutomatically=True, postRunCommands=None,
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lldbVSCodeEnv=None):
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'''Build the default Makefile target, create the VSCode debug adaptor,
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and launch the process.
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'''
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self.build_and_create_debug_adaptor(lldbVSCodeEnv)
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self.assertTrue(os.path.exists(program), 'executable must exist')
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return self.launch(program, args, cwd, env, stopOnEntry, disableASLR,
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disableSTDIO, shellExpandArguments, trace,
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initCommands, preRunCommands, stopCommands, exitCommands,
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terminateCommands, sourcePath, debuggerRoot, runInTerminal=runInTerminal,
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disconnectAutomatically=disconnectAutomatically,
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postRunCommands=postRunCommands)
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