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"""
Test many basic expression commands and SBFrame.EvaluateExpression() API.
Test cases:
o test_many_expr_commands:
Test many basic expression commands.
o test_evaluate_expression_python:
Use Python APIs (SBFrame.EvaluateExpression()) to evaluate expressions.
o test_expr_commands_can_handle_quotes:
Throw some expression commands with quotes at lldb.
"""
from __future__ import print_function
import unittest2
import os
import time
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class BasicExprCommandsTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line number to break for main.c.
self.line = line_number(
'main.cpp',
'// Please test many expressions while stopped at this line:')
# 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):
"""These basic expression commands should work as expected."""
self.build()
self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
lldbutil.run_break_set_by_file_and_line(
self, "main.cpp", self.line, num_expected_locations=1, loc_exact=False)
self.runCmd("run", RUN_SUCCEEDED)
@unittest2.expectedFailure(
"llvm.org/pr17135 <rdar://problem/14874559> APFloat::toString does not identify the correct (i.e. least) precision.")
def test_floating_point_expr_commands(self):
self.build_and_run()
self.expect("expression 2.234f",
patterns=["\(float\) \$.* = 2\.234"])
# (float) $2 = 2.234
def test_many_expr_commands(self):
self.build_and_run()
self.expect("expression 2",
patterns=["\(int\) \$.* = 2"])
# (int) $0 = 1
self.expect("expression 2ull",
patterns=["\(unsigned long long\) \$.* = 2"])
# (unsigned long long) $1 = 2
self.expect("expression 0.5f",
patterns=["\(float\) \$.* = 0\.5"])
# (float) $2 = 0.5
self.expect("expression 2.234",
patterns=["\(double\) \$.* = 2\.234"])
# (double) $3 = 2.234
self.expect("expression 2+3",
patterns=["\(int\) \$.* = 5"])
# (int) $4 = 5
self.expect("expression argc",
patterns=["\(int\) \$.* = 1"])
# (int) $5 = 1
self.expect("expression argc + 22",
patterns=["\(int\) \$.* = 23"])
# (int) $6 = 23
self.expect("expression argv",
patterns=["\(const char \*\*\) \$.* = 0x"])
# (const char *) $7 = ...
self.expect("expression argv[0]",
substrs=["(const char *)",
"a.out"])
# (const char *) $8 = 0x... "/Volumes/data/lldb/svn/trunk/test/expression_command/test/a.out"
@add_test_categories(['pyapi'])
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr21765")
def test_evaluate_expression_python(self):
"""Test SBFrame.EvaluateExpression() API for evaluating an expression."""
self.build()
exe = os.path.join(os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
# Create the breakpoint.
filespec = lldb.SBFileSpec("main.cpp", False)
breakpoint = target.BreakpointCreateByLocation(filespec, self.line)
self.assertTrue(breakpoint, VALID_BREAKPOINT)
# Verify the breakpoint just created.
self.expect(str(breakpoint), BREAKPOINT_CREATED, exe=False,
substrs=['main.cpp',
str(self.line)])
# Launch the process, and do not stop at the entry point.
# Pass 'X Y Z' as the args, which makes argc == 4.
process = target.LaunchSimple(
['X', 'Y', 'Z'], None, self.get_process_working_directory())
if not process:
self.fail("SBTarget.LaunchProcess() failed")
if process.GetState() != lldb.eStateStopped:
self.fail("Process should be in the 'stopped' state, "
"instead the actual state is: '%s'" %
lldbutil.state_type_to_str(process.GetState()))
thread = lldbutil.get_one_thread_stopped_at_breakpoint(
process, breakpoint)
self.assertIsNotNone(
thread, "Expected one thread to be stopped at the breakpoint")
# The filename of frame #0 should be 'main.cpp' and function is main.
self.expect(lldbutil.get_filenames(thread)[0],
"Break correctly at main.cpp", exe=False,
startstr="main.cpp")
self.expect(lldbutil.get_function_names(thread)[0],
"Break correctly at main()", exe=False,
startstr="main")
# We should be stopped on the breakpoint with a hit count of 1.
self.assertTrue(breakpoint.GetHitCount() == 1, BREAKPOINT_HIT_ONCE)
#
# Use Python API to evaluate expressions while stopped in a stack frame.
#
frame = thread.GetFrameAtIndex(0)
val = frame.EvaluateExpression("2.234")
self.expect(val.GetValue(), "2.345 evaluated correctly", exe=False,
startstr="2.234")
self.expect(val.GetTypeName(), "2.345 evaluated correctly", exe=False,
startstr="double")
self.DebugSBValue(val)
val = frame.EvaluateExpression("argc")
self.expect(val.GetValue(), "Argc evaluated correctly", exe=False,
startstr="4")
self.DebugSBValue(val)
val = frame.EvaluateExpression("*argv[1]")
self.expect(val.GetValue(), "Argv[1] evaluated correctly", exe=False,
startstr="'X'")
self.DebugSBValue(val)
val = frame.EvaluateExpression("*argv[2]")
self.expect(val.GetValue(), "Argv[2] evaluated correctly", exe=False,
startstr="'Y'")
self.DebugSBValue(val)
val = frame.EvaluateExpression("*argv[3]")
self.expect(val.GetValue(), "Argv[3] evaluated correctly", exe=False,
startstr="'Z'")
self.DebugSBValue(val)
callee_break = target.BreakpointCreateByName(
"a_function_to_call", None)
self.assertTrue(callee_break.GetNumLocations() > 0)
# Make sure ignoring breakpoints works from the command line:
self.expect("expression -i true -- a_function_to_call()",
substrs=['(int) $', ' 1'])
self.assertTrue(callee_break.GetHitCount() == 1)
# Now try ignoring breakpoints using the SB API's:
options = lldb.SBExpressionOptions()
options.SetIgnoreBreakpoints(True)
value = frame.EvaluateExpression('a_function_to_call()', options)
self.assertTrue(value.IsValid())
self.assertTrue(value.GetValueAsSigned(0) == 2)
self.assertTrue(callee_break.GetHitCount() == 2)
# rdar://problem/8686536
# CommandInterpreter::HandleCommand is stripping \'s from input for
# WantsRawCommand commands
@expectedFailureAll(oslist=["windows"], bugnumber="llvm.org/pr21765")
def test_expr_commands_can_handle_quotes(self):
"""Throw some expression commands with quotes at lldb."""
self.build()
self.runCmd("file a.out", CURRENT_EXECUTABLE_SET)
lldbutil.run_break_set_by_file_and_line(
self, "main.cpp", self.line, num_expected_locations=1, loc_exact=False)
self.runCmd("run", RUN_SUCCEEDED)
# runCmd: expression 'a'
# output: (char) $0 = 'a'
self.expect("expression 'a'",
substrs=['(char) $',
"'a'"])
# runCmd: expression (int) printf ("\n\n\tHello there!\n")
# output: (int) $1 = 16
self.expect(r'''expression (int) printf ("\n\n\tHello there!\n")''',
substrs=['(int) $',
'16'])
# runCmd: expression (int) printf("\t\x68\n")
# output: (int) $2 = 3
self.expect(r'''expression (int) printf("\t\x68\n")''',
substrs=['(int) $',
'3'])
# runCmd: expression (int) printf("\"\n")
# output: (int) $3 = 2
self.expect(r'''expression (int) printf("\"\n")''',
substrs=['(int) $',
'2'])
# runCmd: expression (int) printf("'\n")
# output: (int) $4 = 2
self.expect(r'''expression (int) printf("'\n")''',
substrs=['(int) $',
'2'])
# runCmd: command alias print_hi expression (int) printf ("\n\tHi!\n")
# output:
self.runCmd(
r'''command alias print_hi expression (int) printf ("\n\tHi!\n")''')
# This fails currently.
self.expect('print_hi',
substrs=['(int) $',
'6'])
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