diff options
Diffstat (limited to 'packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads')
3 files changed, 226 insertions, 0 deletions
diff --git a/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/Makefile b/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/Makefile new file mode 100644 index 0000000..8817fff --- /dev/null +++ b/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/Makefile @@ -0,0 +1,6 @@ +LEVEL = ../../../make + +ENABLE_THREADS := YES +CXX_SOURCES := main.cpp + +include $(LEVEL)/Makefile.rules diff --git a/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py b/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py new file mode 100644 index 0000000..2318214 --- /dev/null +++ b/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/TestWatchpointMultipleThreads.py @@ -0,0 +1,137 @@ +""" +Test that lldb watchpoint works for multiple threads. +""" + +from __future__ import print_function + + + +import os, time +import re +import lldb +from lldbsuite.test.lldbtest import * +import lldbsuite.test.lldbutil as lldbutil + +class WatchpointForMultipleThreadsTestCase(TestBase): + + mydir = TestBase.compute_mydir(__file__) + + @expectedFailureAndroid(archs=['arm', 'aarch64']) # Watchpoints not supported + @expectedFailureWindows("llvm.org/pr24446") # WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows + def test_watchpoint_multiple_threads(self): + """Test that lldb watchpoint works for multiple threads.""" + self.build() + self.setTearDownCleanup() + self.hello_multiple_threads() + + @expectedFailureAndroid(archs=['arm', 'aarch64']) # Watchpoints not supported + @expectedFailureWindows("llvm.org/pr24446") # WINDOWS XFAIL TRIAGE - Watchpoints not supported on Windows + def test_watchpoint_multiple_threads_wp_set_and_then_delete(self): + """Test that lldb watchpoint works for multiple threads, and after the watchpoint is deleted, the watchpoint event should no longer fires.""" + self.build() + self.setTearDownCleanup() + self.hello_multiple_threads_wp_set_and_then_delete() + + def setUp(self): + # Call super's setUp(). + TestBase.setUp(self) + # Our simple source filename. + self.source = 'main.cpp' + # Find the line number to break inside main(). + self.first_stop = line_number(self.source, '// Set break point at this line') + + def hello_multiple_threads(self): + """Test that lldb watchpoint works for multiple threads.""" + self.runCmd("file %s" % os.path.join(os.getcwd(), 'a.out'), CURRENT_EXECUTABLE_SET) + + # Add a breakpoint to set a watchpoint when stopped on the breakpoint. + lldbutil.run_break_set_by_file_and_line (self, None, self.first_stop, num_expected_locations=1) + + # Run the program. + self.runCmd("run", RUN_SUCCEEDED) + + # We should be stopped again due to the breakpoint. + # The stop reason of the thread should be breakpoint. + self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, + substrs = ['stopped', + 'stop reason = breakpoint']) + + # Now let's set a write-type watchpoint for variable 'g_val'. + # The main.cpp, by design, misbehaves by not following the agreed upon + # protocol of using a mutex while accessing the global pool and by not + # writing to the variable. + self.expect("watchpoint set variable -w write g_val", WATCHPOINT_CREATED, + substrs = ['Watchpoint created', 'size = 4', 'type = w']) + + # Use the '-v' option to do verbose listing of the watchpoint. + # The hit count should be 0 initially. + self.expect("watchpoint list -v", + substrs = ['hit_count = 0']) + + while True: + self.runCmd("process continue") + + self.runCmd("thread list") + if "stop reason = watchpoint" in self.res.GetOutput(): + # Good, we verified that the watchpoint works! + self.runCmd("thread backtrace all") + break + else: + self.fail("The stop reason should be either break or watchpoint") + + # Use the '-v' option to do verbose listing of the watchpoint. + # The hit count should now be 1. + self.expect("watchpoint list -v", + substrs = ['hit_count = 1']) + + def hello_multiple_threads_wp_set_and_then_delete(self): + """Test that lldb watchpoint works for multiple threads, and after the watchpoint is deleted, the watchpoint event should no longer fires.""" + self.runCmd("file %s" % os.path.join(os.getcwd(), 'a.out'), CURRENT_EXECUTABLE_SET) + + # Add a breakpoint to set a watchpoint when stopped on the breakpoint. + lldbutil.run_break_set_by_file_and_line (self, None, self.first_stop, num_expected_locations=1) + + # Run the program. + self.runCmd("run", RUN_SUCCEEDED) + + # We should be stopped again due to the breakpoint. + # The stop reason of the thread should be breakpoint. + self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT, + substrs = ['stopped', + 'stop reason = breakpoint']) + + # Now let's set a write-type watchpoint for variable 'g_val'. + # The main.cpp, by design, misbehaves by not following the agreed upon + # protocol of using a mutex while accessing the global pool and by not + # writing to the variable. + self.expect("watchpoint set variable -w write g_val", WATCHPOINT_CREATED, + substrs = ['Watchpoint created', 'size = 4', 'type = w']) + + # Use the '-v' option to do verbose listing of the watchpoint. + # The hit count should be 0 initially. + self.expect("watchpoint list -v", + substrs = ['hit_count = 0']) + + watchpoint_stops = 0 + while True: + self.runCmd("process continue") + self.runCmd("process status") + if re.search("Process .* exited", self.res.GetOutput()): + # Great, we are done with this test! + break + + self.runCmd("thread list") + if "stop reason = watchpoint" in self.res.GetOutput(): + self.runCmd("thread backtrace all") + watchpoint_stops += 1 + if watchpoint_stops > 1: + self.fail("Watchpoint hits not supposed to exceed 1 by design!") + # Good, we verified that the watchpoint works! Now delete the watchpoint. + if self.TraceOn(): + print("watchpoint_stops=%d at the moment we delete the watchpoint" % watchpoint_stops) + self.runCmd("watchpoint delete 1") + self.expect("watchpoint list -v", + substrs = ['No watchpoints currently set.']) + continue + else: + self.fail("The stop reason should be either break or watchpoint") diff --git a/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/main.cpp b/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/main.cpp new file mode 100644 index 0000000..8a31041 --- /dev/null +++ b/packages/Python/lldbsuite/test/functionalities/watchpoint/multiple_threads/main.cpp @@ -0,0 +1,83 @@ +//===-- main.cpp ------------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include <chrono> +#include <cstdio> +#include <mutex> +#include <random> +#include <thread> + +std::default_random_engine g_random_engine{std::random_device{}()}; +std::uniform_int_distribution<> g_distribution{0, 3000000}; + +uint32_t g_val = 0; + + +uint32_t +access_pool (bool flag = false) +{ + static std::mutex g_access_mutex; + if (!flag) + g_access_mutex.lock(); + + uint32_t old_val = g_val; + if (flag) + { + printf("changing g_val to %d...\n", old_val + 1); + g_val = old_val + 1; + } + + if (!flag) + g_access_mutex.unlock(); + return g_val; +} + +void +thread_func (uint32_t thread_index) +{ + // Break here in order to allow the thread + // to inherit the global watchpoint state. + printf ("%s (thread index = %u) startng...\n", __FUNCTION__, thread_index); + + uint32_t count = 0; + uint32_t val; + while (count++ < 15) + { + // random micro second sleep from zero to 3 seconds + int usec = g_distribution(g_random_engine); + printf ("%s (thread = %u) doing a usleep (%d)...\n", __FUNCTION__, thread_index, usec); + std::this_thread::sleep_for(std::chrono::microseconds{usec}); + + if (count < 7) + val = access_pool (); + else + val = access_pool (true); + + printf ("%s (thread = %u) after usleep access_pool returns %d (count=%d)...\n", __FUNCTION__, thread_index, val, count); + } + printf ("%s (thread index = %u) exiting...\n", __FUNCTION__, thread_index); +} + + +int main (int argc, char const *argv[]) +{ + std::thread threads[3]; + + printf ("Before turning all three threads loose...\n"); // Set break point at this line, + // in order to set our watchpoint. + // Create 3 threads + for (auto &thread : threads) + thread = std::thread{thread_func, std::distance(threads, &thread)}; + + // Join all of our threads + for (auto &thread : threads) + thread.join(); + + return 0; +} |
