Implement -target-attach and -target-detach

Summary:
This changes add -target-attach and -target-detach. 

-target-attach allows lldb-mi to attach to an existing process by it's process id, matching gdb mi's syntax of '-target-attach <pid'. Additionally, support has been added for attaching to a process by name using '-target-attach -n <name>'. Combining this with --waitfor will allow lldb mi to attach to a process by name when the process starts. 

-target-detach simply detaches from the current process

Patch from chuckr@microsoft.com

Test Plan: I have added three tests, one each for -target-attach <pid>, -target-attach -n <name>, and -target-attach -n <name> --waitfor

Reviewers: paulmaybee, abidh, ChuckR

Subscribers: greggm, lldb-commits

Differential Revision: http://reviews.llvm.org/D9484

llvm-svn: 236705

1 files changed, 125 insertions, 0 deletions

diff --git a/lldb/test/tools/lldb-mi/target/TestMiTarget.py b/lldb/test/tools/lldb-mi/target/TestMiTarget.py
new file mode 100644
index 00000000000..427d32a63ae
--- /dev/null
+++ b/lldb/test/tools/lldb-mi/target/TestMiTarget.py
@@ -0,0 +1,125 @@
+"""
+Test lldb-mi -target-xxx commands.
+"""
+
+import lldbmi_testcase
+from lldbtest import *
+import unittest2
+
+class MiTargetTestCase(lldbmi_testcase.MiTestCaseBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @lldbmi_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    @skipIfFreeBSD # llvm.org/pr22411: Failure presumably due to known thread races
+    @skipIfLinux # cannot attach to process on linux
+    def test_lldbmi_target_attach_wait_for(self):
+        """Test that 'lldb-mi --interpreter' works for -target-attach -n <name> --waitfor."""
+           
+        # Build target executable with unique name
+        exeName = self.testMethodName
+        d = {'EXE': exeName}
+        self.buildProgram("test_attach.cpp", exeName)
+        self.addTearDownCleanup(dictionary=d)
+        
+        self.spawnLldbMi(args = None)
+        
+        # Load executable
+        # FIXME: -file-exec-and-sybmols is not required for target attach, but the test will not pass without this
+        self.runCmd("-file-exec-and-symbols %s" % exeName)
+        self.expect("\^done")
+        
+        # Set up attach
+        self.runCmd("-target-attach -n %s --waitfor" % exeName)
+        time.sleep(4) # Give attach time to setup
+              
+        # Start target process
+        self.spawnSubprocess(os.path.join(os.path.dirname(__file__), exeName));
+        self.addTearDownHook(self.cleanupSubprocesses)
+        self.expect("\^done")
+        
+        # Set breakpoint on printf
+        line = line_number('test_attach.cpp', '// BP_i++')
+        self.runCmd("-break-insert -f test_attach.cpp:%d" % line)
+        self.expect("\^done,bkpt={number=\"1\"")
+        
+        # Continue to breakpoint
+        self.runCmd("-exec-continue")
+        self.expect("\*stopped,reason=\"breakpoint-hit\"")
+        
+        # Detach
+        self.runCmd("-target-detach")
+        self.expect("\^done")
+        
+    @lldbmi_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    @skipIfFreeBSD # llvm.org/pr22411: Failure presumably due to known thread races
+    @skipIfLinux # cannot attach to process on linux
+    def test_lldbmi_target_attach_name(self):
+        """Test that 'lldb-mi --interpreter' works for -target-attach -n <name>."""
+           
+        # Build target executable with unique name
+        exeName = self.testMethodName
+        d = {'EXE': exeName}
+        self.buildProgram("test_attach.cpp", exeName)
+        self.addTearDownCleanup(dictionary=d)
+        
+        # Start target process
+        targetProcess = self.spawnSubprocess(os.path.join(os.path.dirname(__file__), exeName));
+        self.addTearDownHook(self.cleanupSubprocesses)
+        
+        self.spawnLldbMi(args = None)
+        
+        # Set up atatch
+        self.runCmd("-target-attach -n %s" % exeName)
+        self.expect("\^done")
+        
+        # Set breakpoint on printf
+        line = line_number('test_attach.cpp', '// BP_i++')
+        self.runCmd("-break-insert -f test_attach.cpp:%d" % line)
+        self.expect("\^done,bkpt={number=\"1\"")
+        
+        # Continue to breakpoint
+        self.runCmd("-exec-continue")
+        self.expect("\*stopped,reason=\"breakpoint-hit\"")
+        
+        # Detach
+        self.runCmd("-target-detach")
+        self.expect("\^done")
+        
+    @lldbmi_test
+    @expectedFailureWindows("llvm.org/pr22274: need a pexpect replacement for windows")
+    @skipIfFreeBSD # llvm.org/pr22411: Failure presumably due to known thread races
+    @skipIfLinux # cannot attach to process on linux
+    def test_lldbmi_target_attach_pid(self):
+        """Test that 'lldb-mi --interpreter' works for -target-attach <pid>."""
+           
+        # Build target executable with unique name
+        exeName = self.testMethodName
+        d = {'EXE': exeName}
+        self.buildProgram("test_attach.cpp", exeName)
+        self.addTearDownCleanup(dictionary=d)
+        
+        # Start target process
+        targetProcess = self.spawnSubprocess(os.path.join(os.path.dirname(__file__), exeName));
+        self.addTearDownHook(self.cleanupSubprocesses)
+        
+        self.spawnLldbMi(args = None)
+        
+        # Set up atatch
+        self.runCmd("-target-attach %d" % targetProcess.pid)
+        self.expect("\^done")
+        
+        # Set breakpoint on printf
+        line = line_number('test_attach.cpp', '// BP_i++')
+        self.runCmd("-break-insert -f test_attach.cpp:%d" % line)
+        self.expect("\^done,bkpt={number=\"1\"")
+        
+        # Continue to breakpoint
+        self.runCmd("-exec-continue")
+        self.expect("\*stopped,reason=\"breakpoint-hit\"")
+        
+        # Detach
+        self.runCmd("-target-detach")
+        self.expect("\^done")