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"""
Test the IR interpreter
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class IRInterpreterTestCase(TestBase):
NO_DEBUG_INFO_TESTCASE = True
def time_expression(self, expr, options):
start = time.time()
res = self.target.EvaluateExpression(expr, options)
return res, time.time() - start
def test_interpreter_timeout(self):
"""Test the timeout logic in the IRInterpreter."""
self.build()
self.target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
self.assertTrue(self.target, VALID_TARGET)
# A non-trivial infinite loop.
inf_loop = "for (unsigned i = 0; i < 100; ++i) --i; 1"
timeout_error = "Reached timeout while interpreting expression"
options = lldb.SBExpressionOptions()
# This is an IRInterpreter specific test, so disable the JIT.
options.SetAllowJIT(False)
# We use a 500ms timeout.
options.SetTimeoutInMicroSeconds(500000)
res, duration_sec = self.time_expression(inf_loop, options)
self.assertIn(timeout_error, str(res.GetError()))
# Depending on the machine load the expression might take quite some
# time, so give the time a generous upper bound.
self.assertLess(duration_sec, 15)
# Try a simple one second timeout.
options.SetTimeoutInMicroSeconds(1000000)
res, duration_sec = self.time_expression(inf_loop, options)
self.assertIn(timeout_error, str(res.GetError()))
# Anything within 5% of 1s is fine, to account for machine differences.
self.assertGreaterEqual(duration_sec, 0.95)
self.assertLess(duration_sec, 30)
def test_interpreter_interrupt(self):
"""Test interrupting the IRInterpreter."""
self.build()
self.target = self.dbg.CreateTarget(self.getBuildArtifact("a.out"))
self.assertTrue(self.target, VALID_TARGET)
# A non-trivial infinite loop.
inf_loop = "for (unsigned i = 0; i < 100; ++i) --i; 1"
options = lldb.SBExpressionOptions()
# This is an IRInterpreter specific test, so disable the JIT.
options.SetAllowJIT(False)
# Make sure we have a pretty long (10s) timeout so we have a chance to
# interrupt the interpreted expression.
options.SetTimeoutInMicroSeconds(10000000)
self.dbg.RequestInterrupt()
self.dbg.SetAsync(True)
res = self.target.EvaluateExpression(inf_loop, options)
self.dbg.SetAsync(False)
# Be sure to turn this off again:
def cleanup():
if self.dbg.InterruptRequested():
self.dbg.CancelInterruptRequest()
self.addTearDownHook(cleanup)
interrupt_error = "Interrupted while interpreting expression"
self.assertIn(interrupt_error, str(res.GetError()))
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break for main.c.
self.line = line_number("main.c", "// Set breakpoint here")
# Disable confirmation prompt to avoid infinite wait
self.runCmd("settings set auto-confirm true")
self.addTearDownHook(lambda: self.runCmd("settings clear auto-confirm"))
def build_and_run(self):
"""Test the IR interpreter"""
self.build()
self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
lldbutil.run_break_set_by_file_and_line(
self, "main.c", self.line, num_expected_locations=1, loc_exact=False
)
self.runCmd("run", RUN_SUCCEEDED)
@expectedFailureAll(
oslist=["windows"],
bugnumber="llvm.org/pr21765",
)
@add_test_categories(["pyapi"])
def test_ir_interpreter(self):
self.build_and_run()
options = lldb.SBExpressionOptions()
options.SetLanguage(lldb.eLanguageTypeC_plus_plus)
set_up_expressions = [
"int $i = 9",
"int $j = 3",
"int $k = 5",
"unsigned long long $ull = -1",
"unsigned $u = -1",
]
expressions = [
"$i + $j",
"$i - $j",
"$i * $j",
"$i / $j",
"$i % $k",
"$i << $j",
"$i & $j",
"$i | $j",
"$i ^ $j",
"($ull & -1) == $u",
]
for expression in set_up_expressions:
self.frame().EvaluateExpression(expression, options)
func_call = "(int)getpid()"
if lldbplatformutil.getPlatform() == "windows":
func_call = "(int)GetCurrentProcessId()"
for expression in expressions:
interp_expression = expression
jit_expression = func_call + "; " + expression
for expression in expressions:
interp_expression = expression
jit_expression = "(int)getpid(); " + expression
interp_result = (
self.frame()
.EvaluateExpression(interp_expression, options)
.GetValueAsSigned()
)
jit_result = (
self.frame()
.EvaluateExpression(jit_expression, options)
.GetValueAsSigned()
)
self.assertEqual(
interp_result, jit_result, "While evaluating " + expression
)
def test_type_conversions(self):
target = self.dbg.GetDummyTarget()
short_val = target.EvaluateExpression("(short)-1")
self.assertEqual(short_val.GetValueAsSigned(), -1)
long_val = target.EvaluateExpression("(long) " + short_val.GetName())
self.assertEqual(long_val.GetValueAsSigned(), -1)
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