forked from OSchip/llvm-project
285 lines
12 KiB
Python
285 lines
12 KiB
Python
"""
|
|
A stress-test of sorts for LLDB's handling of threads in the inferior.
|
|
|
|
This test sets a breakpoint in the main thread where test parameters (numbers of
|
|
threads) can be adjusted, runs the inferior to that point, and modifies the
|
|
locals that control the event thread counts. This test also sets a breakpoint in
|
|
breakpoint_func (the function executed by each 'breakpoint' thread) and a
|
|
watchpoint on a global modified in watchpoint_func. The inferior is continued
|
|
until exit or a crash takes place, and the number of events seen by LLDB is
|
|
verified to match the expected number of events.
|
|
"""
|
|
|
|
|
|
|
|
import unittest2
|
|
import lldb
|
|
from lldbsuite.test.decorators import *
|
|
from lldbsuite.test.lldbtest import *
|
|
from lldbsuite.test import lldbutil
|
|
|
|
|
|
class ConcurrentEventsBase(TestBase):
|
|
|
|
# Concurrency is the primary test factor here, not debug info variants.
|
|
NO_DEBUG_INFO_TESTCASE = True
|
|
|
|
def setUp(self):
|
|
# Call super's setUp().
|
|
super(ConcurrentEventsBase, self).setUp()
|
|
# Find the line number for our breakpoint.
|
|
self.filename = 'main.cpp'
|
|
self.thread_breakpoint_line = line_number(
|
|
self.filename, '// Set breakpoint here')
|
|
self.setup_breakpoint_line = line_number(
|
|
self.filename, '// Break here and adjust num')
|
|
self.finish_breakpoint_line = line_number(
|
|
self.filename, '// Break here and verify one thread is active')
|
|
|
|
def describe_threads(self):
|
|
ret = []
|
|
for x in self.inferior_process:
|
|
id = x.GetIndexID()
|
|
reason = x.GetStopReason()
|
|
status = "stopped" if x.IsStopped() else "running"
|
|
reason_str = lldbutil.stop_reason_to_str(reason)
|
|
if reason == lldb.eStopReasonBreakpoint:
|
|
bpid = x.GetStopReasonDataAtIndex(0)
|
|
bp = self.inferior_target.FindBreakpointByID(bpid)
|
|
reason_str = "%s hit %d times" % (
|
|
lldbutil.get_description(bp), bp.GetHitCount())
|
|
elif reason == lldb.eStopReasonWatchpoint:
|
|
watchid = x.GetStopReasonDataAtIndex(0)
|
|
watch = self.inferior_target.FindWatchpointByID(watchid)
|
|
reason_str = "%s hit %d times" % (
|
|
lldbutil.get_description(watch), watch.GetHitCount())
|
|
elif reason == lldb.eStopReasonSignal:
|
|
signals = self.inferior_process.GetUnixSignals()
|
|
signal_name = signals.GetSignalAsCString(
|
|
x.GetStopReasonDataAtIndex(0))
|
|
reason_str = "signal %s" % signal_name
|
|
|
|
location = "\t".join([lldbutil.get_description(
|
|
x.GetFrameAtIndex(i)) for i in range(x.GetNumFrames())])
|
|
ret.append(
|
|
"thread %d %s due to %s at\n\t%s" %
|
|
(id, status, reason_str, location))
|
|
return ret
|
|
|
|
def add_breakpoint(self, line, descriptions):
|
|
""" Adds a breakpoint at self.filename:line and appends its description to descriptions, and
|
|
returns the LLDB SBBreakpoint object.
|
|
"""
|
|
|
|
bpno = lldbutil.run_break_set_by_file_and_line(
|
|
self, self.filename, line, num_expected_locations=-1)
|
|
bp = self.inferior_target.FindBreakpointByID(bpno)
|
|
descriptions.append(
|
|
": file = 'main.cpp', line = %d" %
|
|
self.finish_breakpoint_line)
|
|
return bp
|
|
|
|
def inferior_done(self):
|
|
""" Returns true if the inferior is done executing all the event threads (and is stopped at self.finish_breakpoint,
|
|
or has terminated execution.
|
|
"""
|
|
return self.finish_breakpoint.GetHitCount() > 0 or \
|
|
self.crash_count > 0 or \
|
|
self.inferior_process.GetState() == lldb.eStateExited
|
|
|
|
def count_signaled_threads(self):
|
|
count = 0
|
|
for thread in self.inferior_process:
|
|
if thread.GetStopReason() == lldb.eStopReasonSignal and thread.GetStopReasonDataAtIndex(
|
|
0) == self.inferior_process.GetUnixSignals().GetSignalNumberFromName('SIGUSR1'):
|
|
count += 1
|
|
return count
|
|
|
|
def do_thread_actions(self,
|
|
num_breakpoint_threads=0,
|
|
num_signal_threads=0,
|
|
num_watchpoint_threads=0,
|
|
num_crash_threads=0,
|
|
num_delay_breakpoint_threads=0,
|
|
num_delay_signal_threads=0,
|
|
num_delay_watchpoint_threads=0,
|
|
num_delay_crash_threads=0):
|
|
""" Sets a breakpoint in the main thread where test parameters (numbers of threads) can be adjusted, runs the inferior
|
|
to that point, and modifies the locals that control the event thread counts. Also sets a breakpoint in
|
|
breakpoint_func (the function executed by each 'breakpoint' thread) and a watchpoint on a global modified in
|
|
watchpoint_func. The inferior is continued until exit or a crash takes place, and the number of events seen by LLDB
|
|
is verified to match the expected number of events.
|
|
"""
|
|
exe = self.getBuildArtifact("a.out")
|
|
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
|
|
|
|
# Get the target
|
|
self.inferior_target = self.dbg.GetSelectedTarget()
|
|
|
|
expected_bps = []
|
|
|
|
# Initialize all the breakpoints (main thread/aux thread)
|
|
self.setup_breakpoint = self.add_breakpoint(
|
|
self.setup_breakpoint_line, expected_bps)
|
|
self.finish_breakpoint = self.add_breakpoint(
|
|
self.finish_breakpoint_line, expected_bps)
|
|
|
|
# Set the thread breakpoint
|
|
if num_breakpoint_threads + num_delay_breakpoint_threads > 0:
|
|
self.thread_breakpoint = self.add_breakpoint(
|
|
self.thread_breakpoint_line, expected_bps)
|
|
|
|
# Verify breakpoints
|
|
self.expect(
|
|
"breakpoint list -f",
|
|
"Breakpoint locations shown correctly",
|
|
substrs=expected_bps)
|
|
|
|
# Run the program.
|
|
self.runCmd("run", RUN_SUCCEEDED)
|
|
|
|
# Check we are at line self.setup_breakpoint
|
|
self.expect("thread backtrace", STOPPED_DUE_TO_BREAKPOINT,
|
|
substrs=["stop reason = breakpoint 1."])
|
|
|
|
# Initialize the (single) watchpoint on the global variable (g_watchme)
|
|
if num_watchpoint_threads + num_delay_watchpoint_threads > 0:
|
|
self.runCmd("watchpoint set variable g_watchme")
|
|
for w in self.inferior_target.watchpoint_iter():
|
|
self.thread_watchpoint = w
|
|
self.assertTrue(
|
|
"g_watchme" in str(
|
|
self.thread_watchpoint),
|
|
"Watchpoint location not shown correctly")
|
|
|
|
# Get the process
|
|
self.inferior_process = self.inferior_target.GetProcess()
|
|
|
|
# We should be stopped at the setup site where we can set the number of
|
|
# threads doing each action (break/crash/signal/watch)
|
|
self.assertEqual(
|
|
self.inferior_process.GetNumThreads(),
|
|
1,
|
|
'Expected to stop before any additional threads are spawned.')
|
|
|
|
self.runCmd("expr num_breakpoint_threads=%d" % num_breakpoint_threads)
|
|
self.runCmd("expr num_crash_threads=%d" % num_crash_threads)
|
|
self.runCmd("expr num_signal_threads=%d" % num_signal_threads)
|
|
self.runCmd("expr num_watchpoint_threads=%d" % num_watchpoint_threads)
|
|
|
|
self.runCmd(
|
|
"expr num_delay_breakpoint_threads=%d" %
|
|
num_delay_breakpoint_threads)
|
|
self.runCmd(
|
|
"expr num_delay_crash_threads=%d" %
|
|
num_delay_crash_threads)
|
|
self.runCmd(
|
|
"expr num_delay_signal_threads=%d" %
|
|
num_delay_signal_threads)
|
|
self.runCmd(
|
|
"expr num_delay_watchpoint_threads=%d" %
|
|
num_delay_watchpoint_threads)
|
|
|
|
# Continue the inferior so threads are spawned
|
|
self.runCmd("continue")
|
|
|
|
# Make sure we see all the threads. The inferior program's threads all synchronize with a pseudo-barrier; that is,
|
|
# the inferior program ensures all threads are started and running
|
|
# before any thread triggers its 'event'.
|
|
num_threads = self.inferior_process.GetNumThreads()
|
|
expected_num_threads = num_breakpoint_threads + num_delay_breakpoint_threads \
|
|
+ num_signal_threads + num_delay_signal_threads \
|
|
+ num_watchpoint_threads + num_delay_watchpoint_threads \
|
|
+ num_crash_threads + num_delay_crash_threads + 1
|
|
self.assertEqual(
|
|
num_threads,
|
|
expected_num_threads,
|
|
'Expected to see %d threads, but seeing %d. Details:\n%s' %
|
|
(expected_num_threads,
|
|
num_threads,
|
|
"\n\t".join(
|
|
self.describe_threads())))
|
|
|
|
self.signal_count = self.count_signaled_threads()
|
|
self.crash_count = len(
|
|
lldbutil.get_crashed_threads(
|
|
self, self.inferior_process))
|
|
|
|
# Run to completion (or crash)
|
|
while not self.inferior_done():
|
|
if self.TraceOn():
|
|
self.runCmd("thread backtrace all")
|
|
self.runCmd("continue")
|
|
self.signal_count += self.count_signaled_threads()
|
|
self.crash_count += len(
|
|
lldbutil.get_crashed_threads(
|
|
self, self.inferior_process))
|
|
|
|
if num_crash_threads > 0 or num_delay_crash_threads > 0:
|
|
# Expecting a crash
|
|
self.assertTrue(
|
|
self.crash_count > 0,
|
|
"Expecting at least one thread to crash. Details: %s" %
|
|
"\t\n".join(
|
|
self.describe_threads()))
|
|
|
|
# Ensure the zombie process is reaped
|
|
self.runCmd("process kill")
|
|
|
|
elif num_crash_threads == 0 and num_delay_crash_threads == 0:
|
|
# There should be a single active thread (the main one) which hit
|
|
# the breakpoint after joining
|
|
self.assertEqual(
|
|
1,
|
|
self.finish_breakpoint.GetHitCount(),
|
|
"Expected main thread (finish) breakpoint to be hit once")
|
|
|
|
num_threads = self.inferior_process.GetNumThreads()
|
|
self.assertEqual(
|
|
1,
|
|
num_threads,
|
|
"Expecting 1 thread but seeing %d. Details:%s" %
|
|
(num_threads,
|
|
"\n\t".join(
|
|
self.describe_threads())))
|
|
self.runCmd("continue")
|
|
|
|
# The inferior process should have exited without crashing
|
|
self.assertEqual(
|
|
0,
|
|
self.crash_count,
|
|
"Unexpected thread(s) in crashed state")
|
|
self.assertEqual(
|
|
self.inferior_process.GetState(),
|
|
lldb.eStateExited,
|
|
PROCESS_EXITED)
|
|
|
|
# Verify the number of actions took place matches expected numbers
|
|
expected_breakpoint_threads = num_delay_breakpoint_threads + num_breakpoint_threads
|
|
breakpoint_hit_count = self.thread_breakpoint.GetHitCount(
|
|
) if expected_breakpoint_threads > 0 else 0
|
|
self.assertEqual(
|
|
expected_breakpoint_threads,
|
|
breakpoint_hit_count,
|
|
"Expected %d breakpoint hits, but got %d" %
|
|
(expected_breakpoint_threads,
|
|
breakpoint_hit_count))
|
|
|
|
expected_signal_threads = num_delay_signal_threads + num_signal_threads
|
|
self.assertEqual(
|
|
expected_signal_threads,
|
|
self.signal_count,
|
|
"Expected %d stops due to signal delivery, but got %d" %
|
|
(expected_signal_threads,
|
|
self.signal_count))
|
|
|
|
expected_watchpoint_threads = num_delay_watchpoint_threads + num_watchpoint_threads
|
|
watchpoint_hit_count = self.thread_watchpoint.GetHitCount(
|
|
) if expected_watchpoint_threads > 0 else 0
|
|
self.assertEqual(
|
|
expected_watchpoint_threads,
|
|
watchpoint_hit_count,
|
|
"Expected %d watchpoint hits, got %d" %
|
|
(expected_watchpoint_threads,
|
|
watchpoint_hit_count))
|