diff options
Diffstat (limited to 'packages/Python/lldbsuite/test/functionalities/thread/exit_during_break')
3 files changed, 216 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/Makefile b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/Makefile new file mode 100644 index 0000000..67aa166 --- /dev/null +++ b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/Makefile @@ -0,0 +1,5 @@ +LEVEL = ../../../make + +CXX_SOURCES := main.cpp +ENABLE_THREADS := YES +include $(LEVEL)/Makefile.rules diff --git a/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py new file mode 100644 index 0000000..f999ffe --- /dev/null +++ b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/TestExitDuringBreak.py @@ -0,0 +1,81 @@ +""" +Test number of threads. +""" + +from __future__ import print_function + + + +import os, time +import lldb +from lldbsuite.test.lldbtest import * +import lldbsuite.test.lldbutil as lldbutil + +class ExitDuringBreakpointTestCase(TestBase): + + mydir = TestBase.compute_mydir(__file__) + + def setUp(self): + # Call super's setUp(). + TestBase.setUp(self) + # Find the line number for our breakpoint. + self.breakpoint = line_number('main.cpp', '// Set breakpoint here') + + @expectedFailureDarwin("llvm.org/pr15824") # thread states not properly maintained + @expectedFailureFreeBSD("llvm.org/pr18190") # thread states not properly maintained + @expectedFailureLinux("llvm.org/pr15824") # thread states not properly maintained + @expectedFailureWindows("llvm.org/pr24668") # Breakpoints not resolved correctly + def test(self): + """Test thread exit during breakpoint handling.""" + self.build(dictionary=self.getBuildFlags()) + exe = os.path.join(os.getcwd(), "a.out") + self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET) + + # This should create a breakpoint in the main thread. + lldbutil.run_break_set_by_file_and_line (self, "main.cpp", self.breakpoint, num_expected_locations=1) + + # The breakpoint list should show 1 location. + self.expect("breakpoint list -f", "Breakpoint location shown correctly", + substrs = ["1: file = 'main.cpp', line = %d, locations = 1" % self.breakpoint]) + + # Run the program. + self.runCmd("run", RUN_SUCCEEDED) + + # The stop reason of the thread should be breakpoint. + self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, + substrs = ['stopped', + 'stop reason = breakpoint']) + + # Get the target process + target = self.dbg.GetSelectedTarget() + process = target.GetProcess() + + # The exit probably occurred during breakpoint handling, but it isn't + # guaranteed. The main thing we're testing here is that the debugger + # handles this cleanly is some way. + + # Get the number of threads + num_threads = process.GetNumThreads() + + # Make sure we see at least five threads + self.assertTrue(num_threads >= 5, 'Number of expected threads and actual threads do not match.') + + # Get the thread objects + thread1 = process.GetThreadAtIndex(0) + thread2 = process.GetThreadAtIndex(1) + thread3 = process.GetThreadAtIndex(2) + thread4 = process.GetThreadAtIndex(3) + thread5 = process.GetThreadAtIndex(4) + + # Make sure all threads are stopped + self.assertTrue(thread1.IsStopped(), "Thread 1 didn't stop during breakpoint") + self.assertTrue(thread2.IsStopped(), "Thread 2 didn't stop during breakpoint") + self.assertTrue(thread3.IsStopped(), "Thread 3 didn't stop during breakpoint") + self.assertTrue(thread4.IsStopped(), "Thread 4 didn't stop during breakpoint") + self.assertTrue(thread5.IsStopped(), "Thread 5 didn't stop during breakpoint") + + # Run to completion + self.runCmd("continue") + + # At this point, the inferior process should have exited. + self.assertTrue(process.GetState() == lldb.eStateExited, PROCESS_EXITED) diff --git a/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/main.cpp b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/main.cpp new file mode 100644 index 0000000..3570637 --- /dev/null +++ b/packages/Python/lldbsuite/test/functionalities/thread/exit_during_break/main.cpp @@ -0,0 +1,130 @@ +//===-- main.cpp ------------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// This test is intended to create a situation in which one thread will exit +// while a breakpoint is being handled in another thread. This may not always +// happen because it's possible that the exiting thread will exit before the +// breakpoint is hit. The test case should be flexible enough to treat that +// as success. + +#include <atomic> +#include <chrono> +#include <thread> + +volatile int g_test = 0; + +// Note that although hogging the CPU while waiting for a variable to change +// would be terrible in production code, it's great for testing since it +// avoids a lot of messy context switching to get multiple threads synchronized. +#define do_nothing() + +#define pseudo_barrier_wait(bar) \ + --bar; \ + while (bar > 0) \ + do_nothing(); + +#define pseudo_barrier_init(bar, count) (bar = count) + +// A barrier to synchronize all the threads except the one that will exit. +std::atomic_int g_barrier1; + +// A barrier to synchronize all the threads including the one that will exit. +std::atomic_int g_barrier2; + +// A barrier to keep the first group of threads from exiting until after the +// breakpoint has been passed. +std::atomic_int g_barrier3; + +void * +break_thread_func () +{ + // Wait until the entire first group of threads is running + pseudo_barrier_wait(g_barrier1); + + // Wait for the exiting thread to start + pseudo_barrier_wait(g_barrier2); + + // Do something + g_test++; // Set breakpoint here + + // Synchronize after the breakpoint + pseudo_barrier_wait(g_barrier3); + + // Return + return NULL; +} + +void * +wait_thread_func () +{ + // Wait until the entire first group of threads is running + pseudo_barrier_wait(g_barrier1); + + // Wait for the exiting thread to start + pseudo_barrier_wait(g_barrier2); + + // Wait until the breakpoint has been passed + pseudo_barrier_wait(g_barrier3); + + // Return + return NULL; +} + +void * +exit_thread_func () +{ + // Sync up with the rest of the threads. + pseudo_barrier_wait(g_barrier2); + + // Try to make sure this thread doesn't exit until the breakpoint is hit. + std::this_thread::sleep_for(std::chrono::microseconds(1)); + + // Return + return NULL; +} + +int main () +{ + + // The first barrier waits for the non-exiting threads to start. + // This thread will also participate in that barrier. + // The idea here is to guarantee that the exiting thread will be + // last in the internal list maintained by the debugger. + pseudo_barrier_init(g_barrier1, 5); + + // The second break synchronyizes thread exection with the breakpoint. + pseudo_barrier_init(g_barrier2, 5); + + // The third barrier keeps the waiting threads around until the breakpoint + // has been passed. + pseudo_barrier_init(g_barrier3, 4); + + // Create a thread to hit the breakpoint + std::thread thread_1(break_thread_func); + + // Create more threads to slow the debugger down during processing. + std::thread thread_2(wait_thread_func); + std::thread thread_3(wait_thread_func); + std::thread thread_4(wait_thread_func); + + // Wait for all these threads to get started. + pseudo_barrier_wait(g_barrier1); + + // Create a thread to exit during the breakpoint + std::thread thread_5(exit_thread_func); + + // Wait for the threads to finish + thread_5.join(); + thread_4.join(); + thread_3.join(); + thread_2.join(); + thread_1.join(); + + return 0; +} |
