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"""Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""
from __future__ import print_function
import os, time
import lldb
import lldbsuite.test.lldbutil as lldbutil
from lldbsuite.test.lldbtest import *
class TestCStepping(TestBase):
mydir = TestBase.compute_mydir(__file__)
def getCategories(self):
return ['basic_process']
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line numbers that we will step to in main:
self.main_source = "main.c"
@expectedFailureFreeBSD('llvm.org/pr17932')
@expectedFailureLinux # llvm.org/pr14437
@expectedFailureWindows("llvm.org/pr24777")
@add_test_categories(['pyapi'])
def test_and_python_api(self):
"""Test stepping over vrs. hitting breakpoints & subsequent stepping in various forms."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
self.main_source_spec = lldb.SBFileSpec (self.main_source)
breakpoints_to_disable = []
break_1_in_main = target.BreakpointCreateBySourceRegex ('// frame select 2, thread step-out while stopped at .c.1..', self.main_source_spec)
self.assertTrue(break_1_in_main, VALID_BREAKPOINT)
breakpoints_to_disable.append (break_1_in_main)
break_in_a = target.BreakpointCreateBySourceRegex ('// break here to stop in a before calling b', self.main_source_spec)
self.assertTrue(break_in_a, VALID_BREAKPOINT)
breakpoints_to_disable.append (break_in_a)
break_in_b = target.BreakpointCreateBySourceRegex ('// thread step-out while stopped at .c.2..', self.main_source_spec)
self.assertTrue(break_in_b, VALID_BREAKPOINT)
breakpoints_to_disable.append (break_in_b)
break_in_c = target.BreakpointCreateBySourceRegex ('// Find the line number of function .c. here.', self.main_source_spec)
self.assertTrue(break_in_c, VALID_BREAKPOINT)
breakpoints_to_disable.append (break_in_c)
# 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.
threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_1_in_main)
if len(threads) != 1:
self.fail ("Failed to stop at first breakpoint in main.")
thread = threads[0]
# Get the stop id and for fun make sure it increases:
old_stop_id = process.GetStopID()
# Now step over, which should cause us to hit the breakpoint in "a"
thread.StepOver()
# The stop reason of the thread should be breakpoint.
threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_a)
if len(threads) != 1:
self.fail ("Failed to stop at breakpoint in a.")
# Check that the stop ID increases:
new_stop_id = process.GetStopID()
self.assertTrue(new_stop_id > old_stop_id, "Stop ID increases monotonically.")
thread = threads[0]
# Step over, and we should hit the breakpoint in b:
thread.StepOver()
threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_b)
if len(threads) != 1:
self.fail ("Failed to stop at breakpoint in b.")
thread = threads[0]
# Now try running some function, and make sure that we still end up in the same place
# and with the same stop reason.
frame = thread.GetFrameAtIndex(0)
current_line = frame.GetLineEntry().GetLine()
current_file = frame.GetLineEntry().GetFileSpec()
current_bp = []
current_bp.append(thread.GetStopReasonDataAtIndex(0))
current_bp.append(thread.GetStopReasonDataAtIndex(1))
stop_id_before_expression = process.GetStopID()
stop_id_before_including_expressions = process.GetStopID(True)
frame.EvaluateExpression ("(int) printf (print_string)")
frame = thread.GetFrameAtIndex(0)
self.assertTrue (current_line == frame.GetLineEntry().GetLine(), "The line stayed the same after expression.")
self.assertTrue (current_file == frame.GetLineEntry().GetFileSpec(), "The file stayed the same after expression.")
self.assertTrue (thread.GetStopReason() == lldb.eStopReasonBreakpoint, "We still say we stopped for a breakpoint.")
self.assertTrue (thread.GetStopReasonDataAtIndex(0) == current_bp[0] and thread.GetStopReasonDataAtIndex(1) == current_bp[1], "And it is the same breakpoint.")
# Also make sure running the expression didn't change the public stop id
# but did change if we are asking for expression stops as well.
stop_id_after_expression = process.GetStopID()
stop_id_after_including_expressions = process.GetStopID(True)
self.assertTrue (stop_id_before_expression == stop_id_after_expression, "Expression calling doesn't change stop ID")
self.assertTrue (stop_id_after_including_expressions > stop_id_before_including_expressions, "Stop ID including expressions increments over expression call.")
# Do the same thing with an expression that's going to crash, and make sure we are still unchanged.
frame.EvaluateExpression ("((char *) 0)[0] = 'a'")
frame = thread.GetFrameAtIndex(0)
self.assertTrue (current_line == frame.GetLineEntry().GetLine(), "The line stayed the same after expression.")
self.assertTrue (current_file == frame.GetLineEntry().GetFileSpec(), "The file stayed the same after expression.")
self.assertTrue (thread.GetStopReason() == lldb.eStopReasonBreakpoint, "We still say we stopped for a breakpoint.")
self.assertTrue (thread.GetStopReasonDataAtIndex(0) == current_bp[0] and thread.GetStopReasonDataAtIndex(1) == current_bp[1], "And it is the same breakpoint.")
# Now continue and make sure we just complete the step:
# Disable all our breakpoints first - sometimes the compiler puts two line table entries in for the
# breakpoint a "b" and we don't want to hit that.
for bkpt in breakpoints_to_disable:
bkpt.SetEnabled(False)
process.Continue()
self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "a")
self.assertTrue (thread.GetStopReason() == lldb.eStopReasonPlanComplete)
# And one more time should get us back to main:
process.Continue()
self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "main")
self.assertTrue (thread.GetStopReason() == lldb.eStopReasonPlanComplete)
# Now make sure we can call a function, break in the called function, then have "continue" get us back out again:
frame = thread.GetFrameAtIndex(0)
frame = thread.GetFrameAtIndex(0)
current_line = frame.GetLineEntry().GetLine()
current_file = frame.GetLineEntry().GetFileSpec()
break_in_b.SetEnabled(True)
frame.EvaluateExpression ("b (4)", lldb.eNoDynamicValues, False)
threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_b)
if len(threads) != 1:
self.fail ("Failed to stop at breakpoint in b when calling b.")
thread = threads[0]
# So do a step over here to make sure we can still do that:
thread.StepOver()
# See that we are still in b:
func_name = thread.GetFrameAtIndex(0).GetFunctionName()
self.assertTrue (func_name == "b", "Should be in 'b', were in %s"%(func_name))
# Okay, now if we continue, we will finish off our function call and we should end up back in "a" as if nothing had happened:
process.Continue ()
self.assertTrue (thread.GetFrameAtIndex(0).GetLineEntry().GetLine() == current_line)
self.assertTrue (thread.GetFrameAtIndex(0).GetLineEntry().GetFileSpec() == current_file)
# Now we are going to test step in targeting a function:
break_in_b.SetEnabled (False)
break_before_complex_1 = target.BreakpointCreateBySourceRegex ('// Stop here to try step in targeting b.', self.main_source_spec)
self.assertTrue(break_before_complex_1, VALID_BREAKPOINT)
break_before_complex_2 = target.BreakpointCreateBySourceRegex ('// Stop here to try step in targeting complex.', self.main_source_spec)
self.assertTrue(break_before_complex_2, VALID_BREAKPOINT)
break_before_complex_3 = target.BreakpointCreateBySourceRegex ('// Stop here to step targeting b and hitting breakpoint.', self.main_source_spec)
self.assertTrue(break_before_complex_3, VALID_BREAKPOINT)
break_before_complex_4 = target.BreakpointCreateBySourceRegex ('// Stop here to make sure bogus target steps over.', self.main_source_spec)
self.assertTrue(break_before_complex_4, VALID_BREAKPOINT)
threads = lldbutil.continue_to_breakpoint(process, break_before_complex_1)
self.assertTrue (len(threads) == 1)
thread = threads[0]
break_before_complex_1.SetEnabled(False)
thread.StepInto ("b")
self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "b")
# Now continue out and stop at the next call to complex. This time step all the way into complex:
threads = lldbutil.continue_to_breakpoint (process, break_before_complex_2)
self.assertTrue (len(threads) == 1)
thread = threads[0]
break_before_complex_2.SetEnabled(False)
thread.StepInto ("complex")
self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "complex")
# Now continue out and stop at the next call to complex. This time enable breakpoints in a and c and then step targeting b:
threads = lldbutil.continue_to_breakpoint (process, break_before_complex_3)
self.assertTrue (len(threads) == 1)
thread = threads[0]
break_before_complex_3.SetEnabled(False)
break_at_start_of_a = target.BreakpointCreateByName ('a')
break_at_start_of_c = target.BreakpointCreateByName ('c')
thread.StepInto ("b")
threads = lldbutil.get_stopped_threads(process, lldb.eStopReasonBreakpoint);
self.assertTrue (len(threads) == 1)
thread = threads[0]
stop_break_id = thread.GetStopReasonDataAtIndex(0)
self.assertTrue(stop_break_id == break_at_start_of_a.GetID() or stop_break_id == break_at_start_of_c.GetID())
break_at_start_of_a.SetEnabled(False)
break_at_start_of_c.SetEnabled(False)
process.Continue()
self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "b")
# Now continue out and stop at the next call to complex. This time enable breakpoints in a and c and then step targeting b:
threads = lldbutil.continue_to_breakpoint (process, break_before_complex_4)
self.assertTrue (len(threads) == 1)
thread = threads[0]
break_before_complex_4.SetEnabled(False)
thread.StepInto("NoSuchFunction")
self.assertTrue (thread.GetFrameAtIndex(0).GetFunctionName() == "main")
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