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"""
Test specific to MIPS
"""
import re
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class AvoidBreakpointInDelaySlotAPITestCase(TestBase):
@skipIf(archs=no_match(re.compile("mips*")))
def test(self):
self.build()
exe = self.getBuildArtifact("a.out")
self.expect("file " + exe, patterns=["Current executable set to .*a.out.*"])
# Create a target by the debugger.
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
breakpoint = target.BreakpointCreateByName("main", "a.out")
self.assertTrue(
breakpoint and breakpoint.GetNumLocations() == 1, 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)
list = target.FindFunctions("foo", lldb.eFunctionNameTypeAuto)
self.assertEqual(list.GetSize(), 1)
sc = list.GetContextAtIndex(0)
self.assertEqual(sc.GetSymbol().GetName(), "foo")
function = sc.GetFunction()
self.assertTrue(function)
self.function(function, target)
def function(self, function, target):
"""Iterate over instructions in function and place a breakpoint on delay slot instruction"""
# Get the list of all instructions in the function
insts = function.GetInstructions(target)
print(insts)
i = 0
for inst in insts:
if inst.HasDelaySlot():
# Remember the address of branch instruction.
branchinstaddress = inst.GetAddress().GetLoadAddress(target)
# Get next instruction i.e delay slot instruction.
delayinst = insts.GetInstructionAtIndex(i + 1)
delayinstaddr = delayinst.GetAddress().GetLoadAddress(target)
# Set breakpoint on delay slot instruction
breakpoint = target.BreakpointCreateByAddress(delayinstaddr)
# Verify the breakpoint.
self.assertTrue(
breakpoint and breakpoint.GetNumLocations() == 1, VALID_BREAKPOINT
)
# Get the location from breakpoint
location = breakpoint.GetLocationAtIndex(0)
# Get the address where breakpoint is actually set.
bpaddr = location.GetLoadAddress()
# Breakpoint address should be adjusted to the address of
# branch instruction.
self.assertEqual(branchinstaddress, bpaddr)
i += 1
else:
i += 1
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