Vendor import of lldb trunk r256945:

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

1 files changed, 133 insertions, 0 deletions

diff --git a/packages/Python/lldbsuite/test/functionalities/conditional_break/TestConditionalBreak.py b/packages/Python/lldbsuite/test/functionalities/conditional_break/TestConditionalBreak.py
new file mode 100644
index 0000000..3ae7a20
--- /dev/null
+++ b/packages/Python/lldbsuite/test/functionalities/conditional_break/TestConditionalBreak.py
@@ -0,0 +1,133 @@
+"""
+Test conditionally break on a function and inspect its variables.
+"""
+
+from __future__ import print_function
+
+
+
+import os, time
+import re
+import lldb
+import lldbsuite.test.lldbutil as lldbutil
+from lldbsuite.test.lldbtest import *
+
+# rdar://problem/8532131
+# lldb not able to digest the clang-generated debug info correctly with respect to function name
+#
+# This class currently fails for clang as well as llvm-gcc.
+
+class ConditionalBreakTestCase(TestBase):
+
+    mydir = TestBase.compute_mydir(__file__)
+
+    @add_test_categories(['pyapi'])
+    def test_with_python(self):
+        """Exercise some thread and frame APIs to break if c() is called by a()."""
+        self.build()
+        self.do_conditional_break()
+
+    def test_with_command(self):
+        """Simulate a user using lldb commands to break on c() if called from a()."""
+        self.build()
+        self.simulate_conditional_break_by_user()
+
+    def do_conditional_break(self):
+        """Exercise some thread and frame APIs to break if c() is called by a()."""
+        exe = os.path.join(os.getcwd(), "a.out")
+
+        target = self.dbg.CreateTarget(exe)
+        self.assertTrue(target, VALID_TARGET)
+
+        breakpoint = target.BreakpointCreateByName("c", exe)
+        self.assertTrue(breakpoint, VALID_BREAKPOINT)
+
+        # Now launch the process, and do not stop at entry point.
+        process = target.LaunchSimple (None, None, self.get_process_working_directory())
+
+        self.assertTrue(process, PROCESS_IS_VALID)
+
+        # The stop reason of the thread should be breakpoint.
+        self.assertTrue(process.GetState() == lldb.eStateStopped,
+                        STOPPED_DUE_TO_BREAKPOINT)
+
+        # Find the line number where a's parent frame function is c.
+        line = line_number('main.c',
+            "// Find the line number where c's parent frame is a here.")
+
+        # Suppose we are only interested in the call scenario where c()'s
+        # immediate caller is a() and we want to find out the value passed from
+        # a().
+        #
+        # The 10 in range(10) is just an arbitrary number, which means we would
+        # like to try for at most 10 times.
+        for j in range(10):
+            if self.TraceOn():
+                print("j is: ", j)
+            thread = process.GetThreadAtIndex(0)
+            
+            if thread.GetNumFrames() >= 2:
+                frame0 = thread.GetFrameAtIndex(0)
+                name0 = frame0.GetFunction().GetName()
+                frame1 = thread.GetFrameAtIndex(1)
+                name1 = frame1.GetFunction().GetName()
+                #lldbutil.print_stacktrace(thread)
+                self.assertTrue(name0 == "c", "Break on function c()")
+                if (name1 == "a"):
+                    # By design, we know that a() calls c() only from main.c:27.
+                    # In reality, similar logic can be used to find out the call
+                    # site.
+                    self.assertTrue(frame1.GetLineEntry().GetLine() == line,
+                                    "Immediate caller a() at main.c:%d" % line)
+
+                    # And the local variable 'val' should have a value of (int) 3.
+                    val = frame1.FindVariable("val")
+                    self.assertTrue(val.GetTypeName() == "int", "'val' has int type")
+                    self.assertTrue(val.GetValue() == "3", "'val' has a value of 3")
+                    break
+
+            process.Continue()
+
+    def simulate_conditional_break_by_user(self):
+        """Simulate a user using lldb commands to break on c() if called from a()."""
+
+        # Sourcing .lldb in the current working directory, which sets the main
+        # executable, sets the breakpoint on c(), and adds the callback for the
+        # breakpoint such that lldb only stops when the caller of c() is a().
+        # the "my" package that defines the date() function.
+        if self.TraceOn():
+            print("About to source .lldb")
+
+        if not self.TraceOn():
+            self.HideStdout()
+
+        # Separate out the "file a.out" command from .lldb file, for the sake of
+        # remote testsuite.
+        self.runCmd("file a.out")
+        self.runCmd("command source .lldb")
+
+        self.runCmd ("break list")
+
+        if self.TraceOn():
+            print("About to run.")
+        self.runCmd("run", RUN_SUCCEEDED)
+
+        self.runCmd ("break list")
+
+        if self.TraceOn():
+            print("Done running")
+
+        # The stop reason of the thread should be breakpoint.
+        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
+            substrs = ['stopped', 'stop reason = breakpoint'])
+
+        # The frame info for frame #0 points to a.out`c and its immediate caller
+        # (frame #1) points to a.out`a.
+
+        self.expect("frame info", "We should stop at c()",
+            substrs = ["a.out`c"])
+
+        # Select our parent frame as the current frame.
+        self.runCmd("frame select 1")
+        self.expect("frame info", "The immediate caller should be a()",
+            substrs = ["a.out`a"])