1e566f6b47
Add the skipIfReproducer decorator to the remaining tests that fail to replay because the GDB remote packets diverge during replay. This is *not* expected and should be fixed, but figuring out exactly what caused the divergence has proven pretty difficult to track down. I've marked these tests as skipped for now so we can get clean results and detect new regressions. I have no evidence to believe that these failures have the same root cause, so I've not assigned them a PR.
140 lines
5.2 KiB
Python
140 lines
5.2 KiB
Python
"""
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Test conditionally break on a function and inspect its variables.
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"""
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from __future__ import print_function
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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# rdar://problem/8532131
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# lldb not able to digest the clang-generated debug info correctly with respect to function name
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#
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# This class currently fails for clang as well as llvm-gcc.
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class ConditionalBreakTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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@add_test_categories(['pyapi'])
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def test_with_python(self):
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"""Exercise some thread and frame APIs to break if c() is called by a()."""
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self.build()
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self.do_conditional_break()
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@skipIfReproducer # Unexpected packet during replay
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def test_with_command(self):
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"""Simulate a user using lldb commands to break on c() if called from a()."""
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self.build()
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self.simulate_conditional_break_by_user()
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def do_conditional_break(self):
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"""Exercise some thread and frame APIs to break if c() is called by a()."""
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exe = self.getBuildArtifact("a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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breakpoint = target.BreakpointCreateByName("c", exe)
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self.assertTrue(breakpoint, VALID_BREAKPOINT)
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# Now launch the process, and do not stop at entry point.
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process = target.LaunchSimple(
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None, None, self.get_process_working_directory())
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self.assertTrue(process, PROCESS_IS_VALID)
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# The stop reason of the thread should be breakpoint.
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self.assertTrue(process.GetState() == lldb.eStateStopped,
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STOPPED_DUE_TO_BREAKPOINT)
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# Find the line number where a's parent frame function is c.
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line = line_number(
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'main.c',
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"// Find the line number where c's parent frame is a here.")
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# Suppose we are only interested in the call scenario where c()'s
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# immediate caller is a() and we want to find out the value passed from
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# a().
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#
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# The 10 in range(10) is just an arbitrary number, which means we would
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# like to try for at most 10 times.
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for j in range(10):
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if self.TraceOn():
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print("j is: ", j)
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thread = lldbutil.get_one_thread_stopped_at_breakpoint(
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process, breakpoint)
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self.assertIsNotNone(
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thread, "Expected one thread to be stopped at the breakpoint")
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if thread.GetNumFrames() >= 2:
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frame0 = thread.GetFrameAtIndex(0)
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name0 = frame0.GetFunction().GetName()
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frame1 = thread.GetFrameAtIndex(1)
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name1 = frame1.GetFunction().GetName()
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# lldbutil.print_stacktrace(thread)
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self.assertTrue(name0 == "c", "Break on function c()")
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if (name1 == "a"):
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# By design, we know that a() calls c() only from main.c:27.
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# In reality, similar logic can be used to find out the call
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# site.
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self.assertTrue(frame1.GetLineEntry().GetLine() == line,
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"Immediate caller a() at main.c:%d" % line)
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# And the local variable 'val' should have a value of (int)
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# 3.
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val = frame1.FindVariable("val")
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self.assertEqual("int", val.GetTypeName())
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self.assertEqual("3", val.GetValue())
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break
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process.Continue()
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def simulate_conditional_break_by_user(self):
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"""Simulate a user using lldb commands to break on c() if called from a()."""
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# Sourcing .lldb in the current working directory, which sets the main
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# executable, sets the breakpoint on c(), and adds the callback for the
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# breakpoint such that lldb only stops when the caller of c() is a().
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# the "my" package that defines the date() function.
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if self.TraceOn():
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print("About to source .lldb")
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if not self.TraceOn():
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self.HideStdout()
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# Separate out the "file " + self.getBuildArtifact("a.out") command from .lldb file, for the sake of
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# remote testsuite.
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self.runCmd("file " + self.getBuildArtifact("a.out"))
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self.runCmd("command source .lldb")
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self.runCmd("break list")
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if self.TraceOn():
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print("About to run.")
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self.runCmd("run", RUN_SUCCEEDED)
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self.runCmd("break list")
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if self.TraceOn():
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print("Done running")
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# The stop reason of the thread should be breakpoint.
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs=['stopped', 'stop reason = breakpoint'])
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# The frame info for frame #0 points to a.out`c and its immediate caller
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# (frame #1) points to a.out`a.
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self.expect("frame info", "We should stop at c()",
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substrs=["a.out`c"])
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# Select our parent frame as the current frame.
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self.runCmd("frame select 1")
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self.expect("frame info", "The immediate caller should be a()",
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substrs=["a.out`a"])
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