Vendor import of lldb trunk r256945:

https://llvm.org/svn/llvm-project/lldb/trunk@256945

9 files changed, 511 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/functionalities/signal/Makefile b/packages/Python/lldbsuite/test/functionalities/signal/Makefile
new file mode 100644
index 0000000..0d70f25
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/Makefile
@@ -0,0 +1,5 @@
+LEVEL = ../../make
+
+C_SOURCES := main.c
+
+include $(LEVEL)/Makefile.rules
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/TestSendSignal.py b/packages/Python/lldbsuite/test/functionalities/signal/TestSendSignal.py
new file mode 100644
index 0000000..971b82a
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/TestSendSignal.py
@@ -0,0 +1,105 @@
+"""Test that lldb command 'process signal SIGUSR1' to send a signal to the inferior works."""
+
+from __future__ import print_function
+
+
+
+import os, time, signal
+import lldb
+from lldbsuite.test.lldbtest import *
+import lldbsuite.test.lldbutil as lldbutil
+
+
+class SendSignalTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # Find the line number to break inside main().
+        self.line = line_number('main.c', 'Put breakpoint here')
+
+    @expectedFailureFreeBSD("llvm.org/pr23318: does not report running state")
+    @skipIfWindows # Windows does not support signals
+    def test_with_run_command(self):
+        """Test that lldb command 'process signal SIGUSR1' sends a signal to the inferior process."""
+        self.build()
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        # Now create a breakpoint on main.c by name 'c'.
+        breakpoint = target.BreakpointCreateByLocation('main.c', self.line)
+        self.assertTrue(breakpoint and
+                        breakpoint.GetNumLocations() == 1,
+                        VALID_BREAKPOINT)
+
+        # Get the breakpoint location from breakpoint after we verified that,
+        # indeed, it has one location.
+        location = breakpoint.GetLocationAtIndex(0)
+        self.assertTrue(location and
+                        location.IsEnabled(),
+                        VALID_BREAKPOINT_LOCATION)
+
+        # Now launch the process, no arguments & do not stop at entry point.
+        launch_info = lldb.SBLaunchInfo([exe])
+        launch_info.SetWorkingDirectory(self.get_process_working_directory())
+
+        process_listener = lldb.SBListener("signal_test_listener")
+        launch_info.SetListener(process_listener)
+        error = lldb.SBError()
+        process = target.Launch(launch_info, error)
+        self.assertTrue(process, PROCESS_IS_VALID)
+
+        self.runCmd("process handle -n False -p True -s True SIGUSR1")
+
+        thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
+        self.assertTrue(thread.IsValid(), "We hit the first breakpoint.")
+
+        # After resuming the process, send it a SIGUSR1 signal.
+
+        self.setAsync(True)
+
+        self.assertTrue(process_listener.IsValid(), "Got a good process listener")
+
+        # Disable our breakpoint, we don't want to hit it anymore...
+        breakpoint.SetEnabled(False)
+
+        # Now continue:
+        process.Continue()
+
+        # If running remote test, there should be a connected event
+        if lldb.remote_platform:
+            self.match_state(process_listener, lldb.eStateConnected)
+
+        self.match_state(process_listener, lldb.eStateRunning)
+
+        # Now signal the process, and make sure it stops:
+        process.Signal(lldbutil.get_signal_number('SIGUSR1'))
+
+        self.match_state(process_listener, lldb.eStateStopped)
+
+        # Now make sure the thread was stopped with a SIGUSR1:
+        threads = lldbutil.get_stopped_threads(process, lldb.eStopReasonSignal)
+        self.assertTrue(len(threads) == 1, "One thread stopped for a signal.")
+        thread = threads[0]
+
+        self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
+        self.assertTrue(thread.GetStopReasonDataAtIndex(0) == lldbutil.get_signal_number('SIGUSR1'),
+                "The stop signal was SIGUSR1")
+
+    def match_state(self, process_listener, expected_state):
+        num_seconds = 5
+        broadcaster = self.process().GetBroadcaster()
+        event_type_mask = lldb.SBProcess.eBroadcastBitStateChanged
+        event = lldb.SBEvent()
+        got_event = process_listener.WaitForEventForBroadcasterWithType(
+            num_seconds, broadcaster, event_type_mask, event)
+        self.assertTrue(got_event, "Got an event")
+        state = lldb.SBProcess.GetStateFromEvent(event)
+        self.assertTrue(state == expected_state,
+                        "It was the %s state." %
+                        lldb.SBDebugger_StateAsCString(expected_state))
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/Makefile b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/Makefile
new file mode 100644
index 0000000..b09a579
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/Makefile
@@ -0,0 +1,5 @@
+LEVEL = ../../../make
+
+C_SOURCES := main.c
+
+include $(LEVEL)/Makefile.rules
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/TestHandleSegv.py b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/TestHandleSegv.py
new file mode 100644
index 0000000..feed5bf
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/TestHandleSegv.py
@@ -0,0 +1,43 @@
+"""Test that we can debug inferiors that handle SIGSEGV by themselves"""
+
+from __future__ import print_function
+
+
+
+import os
+import lldb
+from lldbsuite.test.lldbtest import *
+import lldbsuite.test.lldbutil as lldbutil
+import re
+
+
+class HandleSegvTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipIfWindows # signals do not exist on Windows
+    @skipIfDarwin
+    @expectedFailureFreeBSD("llvm.org/pr23699 SIGSEGV is reported as exception, not signal")
+    def test_inferior_handle_sigsegv(self):
+        self.build()
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        # launch
+        process = target.LaunchSimple(None, None, self.get_process_working_directory())
+        self.assertTrue(process, PROCESS_IS_VALID)
+        self.assertEqual(process.GetState(), lldb.eStateStopped)
+        signo = process.GetUnixSignals().GetSignalNumberFromName("SIGSEGV")
+
+        thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
+        self.assertTrue(thread and thread.IsValid(), "Thread should be stopped due to a signal")
+        self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
+        self.assertEqual(thread.GetStopReasonDataAtIndex(0), signo, "The stop signal was SIGSEGV")
+
+        # Continue until we exit.
+        process.Continue()
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), 0)
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c
new file mode 100644
index 0000000..27d9b8e
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/handle-segv/main.c
@@ -0,0 +1,58 @@
+#include <sys/mman.h>
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+
+enum {
+    kMmapSize = 0x1000,
+    kMagicValue = 47,
+};
+
+void *address;
+volatile sig_atomic_t signaled = 0;
+
+void handler(int sig)
+{
+    signaled = 1;
+    if (munmap(address, kMmapSize) != 0)
+    {
+        perror("munmap");
+        _exit(5);
+    }
+
+    void* newaddr = mmap(address, kMmapSize, PROT_READ | PROT_WRITE,
+            MAP_ANON | MAP_FIXED | MAP_PRIVATE, -1, 0);
+    if (newaddr != address)
+    {
+        fprintf(stderr, "Newly mmaped address (%p) does not equal old address (%p).\n",
+                newaddr, address);
+        _exit(6);
+    }
+    *(int*)newaddr = kMagicValue;
+}
+
+int main()
+{
+    if (signal(SIGSEGV, handler) == SIG_ERR)
+    {
+        perror("signal");
+        return 1;
+    }
+
+    address = mmap(NULL, kMmapSize, PROT_NONE, MAP_ANON | MAP_PRIVATE, -1, 0);
+    if (address == MAP_FAILED)
+    {
+        perror("mmap");
+        return 2;
+    }
+
+    // This should first trigger a segfault. Our handler will make the memory readable and write
+    // the magic value into memory.
+    if (*(int*)address != kMagicValue)
+        return 3;
+
+    if (! signaled)
+        return 4;
+
+    return 0;
+}
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/main.c b/packages/Python/lldbsuite/test/functionalities/signal/main.c
new file mode 100644
index 0000000..77e7605
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/main.c
@@ -0,0 +1,27 @@
+#include <signal.h>
+#include <stdio.h>
+#include <unistd.h>
+
+void handler_usr1 (int i)
+{
+  puts ("got signal usr1");
+}
+
+void handler_alrm (int i)
+{
+  puts ("got signal ALRM");
+}
+
+int main ()
+{
+  int i = 0;
+
+  signal (SIGUSR1, handler_usr1);
+  signal (SIGALRM, handler_alrm);
+
+  puts ("Put breakpoint here");
+
+  while (i++ < 20)
+     sleep (1);
+}
+
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/raise/Makefile b/packages/Python/lldbsuite/test/functionalities/signal/raise/Makefile
new file mode 100644
index 0000000..b09a579
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/raise/Makefile
@@ -0,0 +1,5 @@
+LEVEL = ../../../make
+
+C_SOURCES := main.c
+
+include $(LEVEL)/Makefile.rules
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/raise/TestRaise.py b/packages/Python/lldbsuite/test/functionalities/signal/raise/TestRaise.py
new file mode 100644
index 0000000..39e7753
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/raise/TestRaise.py
@@ -0,0 +1,221 @@
+"""Test that we handle inferiors that send signals to themselves"""
+
+from __future__ import print_function
+
+
+
+import os
+import lldb
+from lldbsuite.test.lldbtest import *
+import lldbsuite.test.lldbutil as lldbutil
+import re
+
+
+@skipIfWindows # signals do not exist on Windows
+class RaiseTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def test_sigstop(self):
+        self.build()
+        self.signal_test('SIGSTOP', False)
+        # passing of SIGSTOP is not correctly handled, so not testing that scenario: https://llvm.org/bugs/show_bug.cgi?id=23574
+
+    @skipIfDarwin # darwin does not support real time signals
+    @skipIfTargetAndroid()
+    def test_sigsigrtmin(self):
+        self.build()
+        self.signal_test('SIGRTMIN', True)
+
+    def launch(self, target, signal):
+        # launch the process, do not stop at entry point.
+        process = target.LaunchSimple([signal], None, self.get_process_working_directory())
+        self.assertTrue(process, PROCESS_IS_VALID)
+        self.assertEqual(process.GetState(), lldb.eStateStopped)
+        thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
+        self.assertTrue(thread.IsValid(), "Thread should be stopped due to a breakpoint")
+        return process
+
+    def set_handle(self, signal, pass_signal, stop_at_signal, notify_signal):
+        return_obj = lldb.SBCommandReturnObject()
+        self.dbg.GetCommandInterpreter().HandleCommand(
+                "process handle %s -p %s -s %s -n %s" % (signal, pass_signal, stop_at_signal, notify_signal),
+                return_obj)
+        self.assertTrue (return_obj.Succeeded() == True, "Setting signal handling failed")
+
+
+    def signal_test(self, signal, test_passing):
+        """Test that we handle inferior raising signals"""
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+        lldbutil.run_break_set_by_symbol(self, "main")
+
+        # launch
+        process = self.launch(target, signal)
+        signo = process.GetUnixSignals().GetSignalNumberFromName(signal)
+
+        # retrieve default signal disposition
+        return_obj = lldb.SBCommandReturnObject()
+        self.dbg.GetCommandInterpreter().HandleCommand("process handle %s " % signal, return_obj)
+        match = re.match('NAME *PASS *STOP *NOTIFY.*(false|true) *(false|true) *(false|true)',
+                return_obj.GetOutput(), re.IGNORECASE | re.DOTALL)
+        if not match:
+            self.fail('Unable to retrieve default signal disposition.')
+        default_pass = match.group(1)
+        default_stop = match.group(2)
+        default_notify = match.group(3)
+
+        # Make sure we stop at the signal
+        self.set_handle(signal, "false", "true", "true")
+        process.Continue()
+        self.assertEqual(process.GetState(), lldb.eStateStopped)
+        thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
+        self.assertTrue(thread.IsValid(), "Thread should be stopped due to a signal")
+        self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
+        self.assertEqual(thread.GetStopReasonDataAtIndex(0), signo,
+                "The stop signal was %s" % signal)
+
+        # Continue until we exit.
+        process.Continue()
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), 0)
+
+        # launch again
+        process = self.launch(target, signal)
+
+        # Make sure we do not stop at the signal. We should still get the notification.
+        self.set_handle(signal, "false", "false", "true")
+        self.expect("process continue", substrs=["stopped and restarted", signal])
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), 0)
+
+        # launch again
+        process = self.launch(target, signal)
+
+        # Make sure we do not stop at the signal, and we do not get the notification.
+        self.set_handle(signal, "false", "false", "false")
+        self.expect("process continue", substrs=["stopped and restarted"], matching=False)
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), 0)
+
+        if not test_passing:
+            # reset signal handling to default
+            self.set_handle(signal, default_pass, default_stop, default_notify)
+            return
+
+        # launch again
+        process = self.launch(target, signal)
+
+        # Make sure we stop at the signal
+        self.set_handle(signal, "true", "true", "true")
+        process.Continue()
+        self.assertEqual(process.GetState(), lldb.eStateStopped)
+        thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
+        self.assertTrue(thread.IsValid(), "Thread should be stopped due to a signal")
+        self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
+        self.assertEqual(thread.GetStopReasonDataAtIndex(0),
+                process.GetUnixSignals().GetSignalNumberFromName(signal),
+                "The stop signal was %s" % signal)
+
+        # Continue until we exit. The process should receive the signal.
+        process.Continue()
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), signo)
+
+        # launch again
+        process = self.launch(target, signal)
+
+        # Make sure we do not stop at the signal. We should still get the notification. Process
+        # should receive the signal.
+        self.set_handle(signal, "true", "false", "true")
+        self.expect("process continue", substrs=["stopped and restarted", signal])
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), signo)
+
+        # launch again
+        process = self.launch(target, signal)
+
+        # Make sure we do not stop at the signal, and we do not get the notification. Process
+        # should receive the signal.
+        self.set_handle(signal, "true", "false", "false")
+        self.expect("process continue", substrs=["stopped and restarted"], matching=False)
+        self.assertEqual(process.GetState(), lldb.eStateExited)
+        self.assertEqual(process.GetExitStatus(), signo)
+
+        # reset signal handling to default
+        self.set_handle(signal, default_pass, default_stop, default_notify)
+
+    @expectedFailureLinux("llvm.org/pr24530") # the signal the inferior generates gets lost
+    @expectedFailureDarwin("llvm.org/pr24530") # the signal the inferior generates gets lost
+    def test_restart_bug(self):
+        """Test that we catch a signal in the edge case where the process receives it while we are
+        about to interrupt it"""
+        self.build()
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        # Create a target by the debugger.
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+        bkpt = target.BreakpointCreateByName("main")
+        self.assertTrue(bkpt.IsValid(), VALID_BREAKPOINT)
+
+        # launch the inferior and don't wait for it to stop
+        self.dbg.SetAsync(True)
+        error = lldb.SBError()
+        listener = lldb.SBListener("my listener")
+        process = target.Launch (listener,
+                ["SIGSTOP"], # argv
+                None,        # envp
+                None,        # stdin_path
+                None,        # stdout_path
+                None,        # stderr_path
+                None,        # working directory
+                0,           # launch flags
+                False,       # Stop at entry
+                error)       # error
+
+        self.assertTrue(process and process.IsValid(), PROCESS_IS_VALID)
+
+        event = lldb.SBEvent()
+
+        # Give the child enough time to reach the breakpoint,
+        # while clearing out all the pending events.
+        # The last WaitForEvent call will time out after 2 seconds.
+        while listener.WaitForEvent(2, event):
+            if self.TraceOn():
+                print("Process changing state to:", self.dbg.StateAsCString(process.GetStateFromEvent(event)))
+
+        # now the process should be stopped
+        self.assertEqual(process.GetState(), lldb.eStateStopped, PROCESS_STOPPED)
+        self.assertEqual(len(lldbutil.get_threads_stopped_at_breakpoint(process, bkpt)), 1,
+                "A thread should be stopped at breakpoint")
+
+        # Remove all breakpoints. This makes sure we don't have to single-step over them when we
+        # resume the process below
+        target.DeleteAllBreakpoints()
+
+        # resume the process and immediately try to set another breakpoint. When using the remote
+        # stub, this will trigger a request to stop the process just as it is about to stop
+        # naturally due to a SIGSTOP signal it raises. Make sure we do not lose this signal.
+        process.Continue()
+        self.assertTrue(target.BreakpointCreateByName("handler").IsValid(), VALID_BREAKPOINT)
+
+        # Clear the events again
+        while listener.WaitForEvent(2, event):
+            if self.TraceOn():
+                print("Process changing state to:", self.dbg.StateAsCString(process.GetStateFromEvent(event)))
+
+        # The process should be stopped due to a signal
+        self.assertEqual(process.GetState(), lldb.eStateStopped)
+        thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
+        self.assertTrue(thread.IsValid(), "Thread should be stopped due to a signal")
+        self.assertTrue(thread.GetStopReasonDataCount() >= 1, "There was data in the event.")
+        signo = process.GetUnixSignals().GetSignalNumberFromName("SIGSTOP")
+        self.assertEqual(thread.GetStopReasonDataAtIndex(0), signo,
+                "The stop signal was %s" % signal)
+
+        # We are done
+        process.Kill()
diff --git a/packages/Python/lldbsuite/test/functionalities/signal/raise/main.c b/packages/Python/lldbsuite/test/functionalities/signal/raise/main.c
new file mode 100644
index 0000000..8827174
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/signal/raise/main.c
@@ -0,0 +1,42 @@
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+void handler(int signo)
+{
+    _exit(signo);
+}
+
+int main (int argc, char *argv[])
+{
+#ifndef __APPLE__
+    // Real time signals not supported on apple platforms.
+    if (signal(SIGRTMIN, handler) == SIG_ERR)
+    {
+        perror("signal(SIGRTMIN)");
+        return 1;
+    }
+#endif
+
+    if (argc < 2)
+    {
+        puts("Please specify a signal to raise");
+        return 1;
+    }
+
+    if (strcmp(argv[1], "SIGSTOP") == 0)
+        raise(SIGSTOP);
+#ifndef __APPLE__
+    else if (strcmp(argv[1], "SIGRTMIN") == 0)
+        raise(SIGRTMIN);
+#endif
+    else
+    {
+        printf("Unknown signal: %s\n", argv[1]);
+        return 1;
+    }
+
+    return 0;
+}
+