Vendor import of lldb trunk r256945:

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

3 files changed, 166 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/lang/objc/print-obj/Makefile b/packages/Python/lldbsuite/test/lang/objc/print-obj/Makefile
new file mode 100644
index 0000000..dba1065
--- /dev/null
+++ b/packages/Python/lldbsuite/test/lang/objc/print-obj/Makefile
@@ -0,0 +1,6 @@
+LEVEL = ../../../make
+
+OBJC_SOURCES := blocked.m
+LDFLAGS = $(CFLAGS) -lobjc -framework Foundation
+
+include $(LEVEL)/Makefile.rules
diff --git a/packages/Python/lldbsuite/test/lang/objc/print-obj/TestPrintObj.py b/packages/Python/lldbsuite/test/lang/objc/print-obj/TestPrintObj.py
new file mode 100644
index 0000000..5c52cc0
--- /dev/null
+++ b/packages/Python/lldbsuite/test/lang/objc/print-obj/TestPrintObj.py
@@ -0,0 +1,87 @@
+"""
+Test "print object" where another thread blocks the print object from making progress.
+"""
+
+from __future__ import print_function
+
+
+
+import os, time
+import lldb
+from lldbsuite.test.lldbtest import *
+
+@skipUnlessDarwin
+class PrintObjTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    def setUp(self):
+        # Call super's setUp().
+        TestBase.setUp(self)
+        # My source program.
+        self.source = "blocked.m"
+        # Find the line numbers to break at.
+        self.line = line_number(self.source, '// Set a breakpoint here.')
+
+    def test_print_obj(self):
+        """
+        Test "print object" where another thread blocks the print object from making progress.
+
+        Set a breakpoint on the line in my_pthread_routine.  Then switch threads
+        to the main thread, and do print the lock_me object.  Since that will
+        try to get the lock already gotten by my_pthread_routime thread, it will
+        have to switch to running all threads, and that should then succeed.
+        """
+        d = {'EXE': 'b.out'}
+        self.build(dictionary=d)
+        self.setTearDownCleanup(dictionary=d)
+        exe = os.path.join(os.getcwd(), 'b.out')
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        breakpoint = target.BreakpointCreateByLocation(self.source, self.line)
+        self.assertTrue(breakpoint, VALID_BREAKPOINT)
+        self.runCmd("breakpoint list")
+
+        # Launch the process, and do not stop at the entry point.
+        process = target.LaunchSimple (None, None, self.get_process_working_directory())
+
+        self.runCmd("thread backtrace all")
+
+        # Let's get the current stopped thread.  We'd like to switch to the
+        # other thread to issue our 'po lock_me' command.
+        import lldbsuite.test.lldbutil as lldbutil
+        this_thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonBreakpoint)
+        self.assertTrue(this_thread)
+
+        # Find the other thread.  The iteration protocol of SBProcess and the
+        # rich comparison methods (__eq__/__ne__) of SBThread come in handy.
+        other_thread = None
+        for t in process:
+            if t != this_thread:
+                other_thread = t
+                break
+
+        # Set the other thread as the selected thread to issue our 'po' command.other
+        self.assertTrue(other_thread)
+        process.SetSelectedThread(other_thread)
+        if self.TraceOn():
+            print("selected thread:" + lldbutil.get_description(other_thread))
+        self.runCmd("thread backtrace")
+
+        # We want to traverse the frame to the one corresponding to blocked.m to
+        # issue our 'po lock_me' command.
+
+        depth = other_thread.GetNumFrames()
+        for i in range(depth):
+            frame = other_thread.GetFrameAtIndex(i)
+            name = frame.GetFunctionName()
+            if name == 'main':
+                other_thread.SetSelectedFrame(i)
+                if self.TraceOn():
+                    print("selected frame:" + lldbutil.get_description(frame))
+                break
+
+        self.expect("po lock_me", OBJECT_PRINTED_CORRECTLY,
+            substrs = ['I am pretty special.'])
diff --git a/packages/Python/lldbsuite/test/lang/objc/print-obj/blocked.m b/packages/Python/lldbsuite/test/lang/objc/print-obj/blocked.m
new file mode 100644
index 0000000..ba24975
--- /dev/null
+++ b/packages/Python/lldbsuite/test/lang/objc/print-obj/blocked.m
@@ -0,0 +1,73 @@
+//===-- blocked.m --------------------------------------------------*- ObjC -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// This file is for testing running "print object" in a case where another thread
+// blocks the print object from making progress.  Set a breakpoint on the line in 
+// my_pthread_routine as indicated.  Then switch threads to the main thread, and
+// do print the lock_me object.  Since that will try to get the lock already gotten
+// by my_pthread_routime thread, it will have to switch to running all threads, and
+// that should then succeed.
+//
+
+#include <Foundation/Foundation.h>
+#include <pthread.h>
+
+static pthread_mutex_t test_mutex;
+
+static void Mutex_Init (void)
+{
+    pthread_mutexattr_t tmp_mutex_attr;
+    pthread_mutexattr_init(&tmp_mutex_attr);
+    pthread_mutex_init(&test_mutex, &tmp_mutex_attr);
+}
+
+@interface LockMe :NSObject
+{
+  
+}
+- (NSString *) description;
+@end
+
+@implementation LockMe 
+- (NSString *) description
+{
+    printf ("LockMe trying to get the lock.\n");
+    pthread_mutex_lock(&test_mutex);
+    printf ("LockMe got the lock.\n");
+    pthread_mutex_unlock(&test_mutex);
+    return @"I am pretty special.\n";
+}
+@end
+
+void *
+my_pthread_routine (void *data)
+{
+    printf ("my_pthread_routine about to enter.\n");  
+    pthread_mutex_lock(&test_mutex);
+    printf ("Releasing Lock.\n"); // Set a breakpoint here.
+    pthread_mutex_unlock(&test_mutex);
+    return NULL;
+}
+
+int
+main ()
+{
+  pthread_attr_t tmp_attr;
+  pthread_attr_init (&tmp_attr);
+  pthread_t my_pthread;
+
+  Mutex_Init ();
+
+  LockMe *lock_me = [[LockMe alloc] init];
+  pthread_create (&my_pthread, &tmp_attr, my_pthread_routine, NULL);
+
+  pthread_join (my_pthread, NULL);
+
+  return 0;
+}