TestMemoryRead.py
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"""
Test the 'memory read' command.
"""
import lldb
from lldbsuite.test.lldbtest import *
import lldbsuite.test.lldbutil as lldbutil
class MemoryReadTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
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 test_memory_read(self):
"""Test the 'memory read' command with plain and vector formats."""
self.build()
exe = self.getBuildArtifact("a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Break in main() after the variables are assigned values.
lldbutil.run_break_set_by_file_and_line(
self, "main.cpp", self.line, num_expected_locations=1, loc_exact=True)
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.assertGreater(address, 0)
self.assertEquals(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.assertEquals(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'])
self.expect('memory read --type int --count 5 `&my_ints[0]`',
substrs=['(int) 0x', '2', '4', '6', '8', '10'])
self.expect(
'memory read --type int --count 5 --format hex `&my_ints[0]`',
substrs=[
'(int) 0x',
'0x',
'0a'])
self.expect(
'memory read --type int --count 5 --offset 5 `&my_ints[0]`',
substrs=[
'(int) 0x',
'12',
'14',
'16',
'18',
'20'])
# the gdb format specifier and the size in characters for
# the returned values including the 0x prefix.
variations = [['b', 4], ['h', 6], ['w', 10], ['g', 18]]
for v in variations:
formatter = v[0]
expected_object_length = v[1]
self.runCmd(
"memory read --gdb-format 4%s &my_uint64s" % formatter)
lines = self.res.GetOutput().splitlines()
objects_read = []
for l in lines:
objects_read.extend(l.split(':')[1].split())
# Check that we got back 4 0x0000 etc bytes
for o in objects_read:
self.assertTrue (len(o) == expected_object_length)
self.assertEquals(len(objects_read), 4)