9749587498
A common debugging pattern is to set a breakpoint that only stops after
a number of hits is recorded. The current implementation never resets
the hit count of breakpoints; as such, if a user re-`run`s their
program, the debugger will never stop on such a breakpoint again.
This behavior is arguably undesirable, as it renders such breakpoints
ineffective on all but the first run. This commit changes the
implementation of the `Will{Launch, Attach}` methods so that they reset
the _target's_ breakpoint hitcounts.
Differential Revision: https://reviews.llvm.org/D133858
88 lines
3.0 KiB
Python
88 lines
3.0 KiB
Python
"""
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Test address breakpoints set with shared library of SBAddress work correctly.
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"""
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import lldb
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import lldbsuite.test.lldbutil as lldbutil
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from lldbsuite.test.lldbtest import *
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class AddressBreakpointTestCase(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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def test_address_breakpoints(self):
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"""Test address breakpoints set with shared library of SBAddress work correctly."""
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self.build()
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self.address_breakpoints()
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def address_breakpoints(self):
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"""Test address breakpoints set with shared library of SBAddress work correctly."""
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target = self.createTestTarget()
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# Now create a breakpoint on main.c by name 'c'.
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breakpoint = target.BreakpointCreateBySourceRegex(
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"Set a breakpoint here", lldb.SBFileSpec("main.c"))
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self.assertTrue(breakpoint and
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breakpoint.GetNumLocations() >= 1,
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VALID_BREAKPOINT)
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# Get the breakpoint location from breakpoint after we verified that,
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# indeed, it has one location.
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location = breakpoint.GetLocationAtIndex(0)
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self.assertTrue(location and
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location.IsEnabled(),
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VALID_BREAKPOINT_LOCATION)
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# Next get the address from the location, and create an address breakpoint using
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# that address:
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address = location.GetAddress()
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target.BreakpointDelete(breakpoint.GetID())
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breakpoint = target.BreakpointCreateBySBAddress(address)
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# Disable ASLR. This will allow us to actually test (on platforms that support this flag)
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# that the breakpoint was able to track the module.
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launch_info = lldb.SBLaunchInfo(None)
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flags = launch_info.GetLaunchFlags()
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flags &= ~lldb.eLaunchFlagDisableASLR
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flags &= lldb.eLaunchFlagInheritTCCFromParent
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launch_info.SetLaunchFlags(flags)
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error = lldb.SBError()
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process = target.Launch(launch_info, error)
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self.assertTrue(process, PROCESS_IS_VALID)
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# Did we hit our breakpoint?
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from lldbsuite.test.lldbutil import get_threads_stopped_at_breakpoint
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threads = get_threads_stopped_at_breakpoint(process, breakpoint)
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self.assertEqual(
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len(threads), 1,
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"There should be a thread stopped at our breakpoint")
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# The hit count for the breakpoint should be 1.
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self.assertEquals(breakpoint.GetHitCount(), 1)
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process.Kill()
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# Now re-launch and see that we hit the breakpoint again:
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launch_info.Clear()
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launch_info.SetLaunchFlags(flags)
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process = target.Launch(launch_info, error)
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self.assertTrue(process, PROCESS_IS_VALID)
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thread = get_threads_stopped_at_breakpoint(process, breakpoint)
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self.assertEqual(
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len(threads), 1,
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"There should be a thread stopped at our breakpoint")
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# The hit count for the breakpoint should be 1, since we reset counts
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# for each run.
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self.assertEquals(breakpoint.GetHitCount(), 1)
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