Vendor import of lldb trunk r256945:

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

3 files changed, 130 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/functionalities/attach_resume/Makefile b/packages/Python/lldbsuite/test/functionalities/attach_resume/Makefile
new file mode 100644
index 0000000..13d40a1
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/attach_resume/Makefile
@@ -0,0 +1,7 @@
+LEVEL = ../../make
+
+CXX_SOURCES := main.cpp
+ENABLE_THREADS := YES
+EXE := AttachResume
+
+include $(LEVEL)/Makefile.rules
diff --git a/packages/Python/lldbsuite/test/functionalities/attach_resume/TestAttachResume.py b/packages/Python/lldbsuite/test/functionalities/attach_resume/TestAttachResume.py
new file mode 100644
index 0000000..693c0a7
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/attach_resume/TestAttachResume.py
@@ -0,0 +1,73 @@
+"""
+Test process attach/resume.
+"""
+
+from __future__ import print_function
+
+
+
+import os, time
+import lldb
+from lldbsuite.test.lldbtest import *
+import lldbsuite.test.lldbutil as lldbutil
+
+exe_name = "AttachResume"  # Must match Makefile
+
+class AttachResumeTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @skipIfRemote
+    @expectedFailureFreeBSD('llvm.org/pr19310')
+    @expectedFailureWindows("llvm.org/pr24778")
+    def test_attach_continue_interrupt_detach(self):
+        """Test attach/continue/interrupt/detach"""
+        self.build()
+        self.process_attach_continue_interrupt_detach()
+
+    def process_attach_continue_interrupt_detach(self):
+        """Test attach/continue/interrupt/detach"""
+
+        exe = os.path.join(os.getcwd(), exe_name)
+
+        popen = self.spawnSubprocess(exe)
+        self.addTearDownHook(self.cleanupSubprocesses)
+
+        self.runCmd("process attach -p " + str(popen.pid))
+
+        self.setAsync(True)
+        listener = self.dbg.GetListener()
+
+        self.runCmd("c")
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning])
+
+        self.runCmd("process interrupt")
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateStopped])
+
+        # be sure to continue/interrupt/continue (r204504)
+        self.runCmd("c")
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning])
+
+        self.runCmd("process interrupt")
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateStopped])
+
+        # Second interrupt should have no effect.
+        self.expect("process interrupt", patterns=["Process is not running"], error=True)
+
+        # check that this breakpoint is auto-cleared on detach (r204752)
+        self.runCmd("br set -f main.cpp -l %u" % (line_number('main.cpp', '// Set breakpoint here')))
+
+        self.runCmd("c")
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning, lldb.eStateStopped])
+        self.expect('br list', 'Breakpoint not hit',
+            substrs = ['hit count = 1'])
+
+        # Make sure the breakpoint is not hit again.
+        self.expect("expr debugger_flag = false", substrs=[" = false"]);
+
+        self.runCmd("c")
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateRunning])
+
+        # make sure to detach while in running state (r204759)
+        self.runCmd("detach")
+        lldbutil.expect_state_changes(self, listener, [lldb.eStateDetached])
diff --git a/packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp b/packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp
new file mode 100644
index 0000000..7cf3602
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/attach_resume/main.cpp
@@ -0,0 +1,50 @@
+#include <stdio.h>
+#include <fcntl.h>
+
+#include <chrono>
+#include <thread>
+
+#if defined(__linux__)
+#include <sys/prctl.h>
+#endif
+
+volatile bool debugger_flag = true; // The debugger will flip this to false
+
+void *start(void *data)
+{
+    int i;
+    size_t idx = (size_t)data;
+    for (i=0; i<30; i++)
+    {
+        if ( idx == 0 && debugger_flag)
+            std::this_thread::sleep_for(std::chrono::microseconds(1)); // Set breakpoint here
+        std::this_thread::sleep_for(std::chrono::seconds(1));
+    }
+    return 0;
+}
+
+int main(int argc, char const *argv[])
+{
+#if defined(__linux__)
+    // Immediately enable any ptracer so that we can allow the stub attach
+    // operation to succeed.  Some Linux kernels are locked down so that
+    // only an ancestor process can be a ptracer of a process.  This disables that
+    // restriction.  Without it, attach-related stub tests will fail.
+#if defined(PR_SET_PTRACER) && defined(PR_SET_PTRACER_ANY)
+    // For now we execute on best effort basis.  If this fails for
+    // some reason, so be it.
+    const int prctl_result = prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);
+    static_cast<void> (prctl_result);
+#endif
+#endif
+
+    static const size_t nthreads = 16;
+    std::thread threads[nthreads];
+    size_t i;
+
+    for (i=0; i<nthreads; i++)
+        threads[i] = std::move(std::thread(start, (void*)i));
+
+    for (i=0; i<nthreads; i++)
+        threads[i].join();
+}