TestMemoryRead.py   [plain text]

"""
Test the 'memory read' command.
"""

import os, time
import re
import unittest2
import lldb
from lldbtest import *

class MemoryReadTestCase(TestBase):

    mydir = os.path.join("functionalities", "memory", "read")

    @unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
    @dsym_test
    def test_memory_read_with_dsym(self):
        """Test the 'memory read' command with plain and vector formats."""
        self.buildDsym()
        self.memory_read_command()

    @dwarf_test
    def test_memory_read_with_dwarf(self):
        """Test the 'memory read' command with plain and vector formats."""
        self.buildDwarf()
        self.memory_read_command()

    def setUp(self):
        # Call super's setUp().
        TestBase.setUp(self)
        # Find the line number to break inside main().
        self.line = line_number('main.cpp', '// Set break point at this line.')

    def memory_read_command(self):
        """Test the 'memory read' command with plain and vector formats."""
        exe = os.path.join(os.getcwd(), "a.out")
        self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)

        # Break in main() aftre the variables are assigned values.
        self.expect("breakpoint set -f main.cpp -l %d" % self.line,
                    BREAKPOINT_CREATED,
            startstr = "Breakpoint created: 1: file ='main.cpp', line = %d, locations = 1" %
                        self.line)

        self.runCmd("run", RUN_SUCCEEDED)

        # The stop reason of the thread should be breakpoint.
        self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
            substrs = ['stopped', 'stop reason = breakpoint'])

        # The breakpoint should have a hit count of 1.
        self.expect("breakpoint list -f", BREAKPOINT_HIT_ONCE,
            substrs = [' resolved, hit count = 1'])

        # Test the memory read commands.

        # (lldb) memory read -f d -c 1 `&argc`
        # 0x7fff5fbff9a0: 1
        self.runCmd("memory read -f d -c 1 `&argc`")

        # Find the starting address for variable 'argc' to verify later that the
        # '--format uint32_t[] --size 4 --count 4' option increments the address
        # correctly.
        line = self.res.GetOutput().splitlines()[0]
        items = line.split(':')
        address = int(items[0], 0)
        argc = int(items[1], 0)
        self.assertTrue(address > 0 and argc == 1)

        # (lldb) memory read --format uint32_t[] --size 4 --count 4 `&argc`
        # 0x7fff5fbff9a0: {0x00000001}
        # 0x7fff5fbff9a4: {0x00000000}
        # 0x7fff5fbff9a8: {0x0ec0bf27}
        # 0x7fff5fbff9ac: {0x215db505}
        self.runCmd("memory read --format uint32_t[] --size 4 --count 4 `&argc`")
        lines = self.res.GetOutput().splitlines()
        for i in range(4):
            if i == 0:
                # Verify that the printout for argc is correct.
                self.assertTrue(argc == int(lines[i].split(':')[1].strip(' {}'), 0))
            addr = int(lines[i].split(':')[0], 0)
            # Verify that the printout for addr is incremented correctly.
            self.assertTrue(addr == (address + i*4))

        # (lldb) memory read --format char[] --size 7 --count 1 `&my_string`
        # 0x7fff5fbff990: {abcdefg}
        self.expect("memory read --format char[] --size 7 --count 1 `&my_string`",
            substrs = ['abcdefg'])

        # (lldb) memory read --format 'hex float' --size 16 `&argc`
        # 0x7fff5fbff5b0: error: unsupported byte size (16) for hex float format
        self.expect("memory read --format 'hex float' --size 16 `&argc`",
            substrs = ['unsupported byte size (16) for hex float format'])

        self.expect("memory read --format 'float' --count 1 --size 8 `&my_double`",
            substrs = ['1234.'])

        # (lldb) memory read --format 'float' --count 1 --size 20 `&my_double`
        # 0x7fff5fbff598: error: unsupported byte size (20) for float format
        self.expect("memory read --format 'float' --count 1 --size 20 `&my_double`",
            substrs = ['unsupported byte size (20) for float format'])


if __name__ == '__main__':
    import atexit
    lldb.SBDebugger.Initialize()
    atexit.register(lambda: lldb.SBDebugger.Terminate())
    unittest2.main()