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"""
Test the 'memory region' command.
"""
import lldb
from lldbsuite.test.decorators import *
from lldbsuite.test.lldbtest import *
from lldbsuite.test import lldbutil
class MemoryCommandRegion(TestBase):
NO_DEBUG_INFO_TESTCASE = True
def setUp(self):
TestBase.setUp(self)
# Find the line number to break for main.c.
self.line = line_number(
'main.cpp',
'// Run here before printing memory regions')
def test_help(self):
""" Test that help shows you must have one of address or --all, not both."""
self.expect("help memory region",
substrs=["memory region <address-expression>",
"memory region -a"])
def setup_program(self):
self.build()
# Set breakpoint in main and run
self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
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)
def test_command(self):
self.setup_program()
interp = self.dbg.GetCommandInterpreter()
result = lldb.SBCommandReturnObject()
# Test that the first 'memory region' command prints the usage.
interp.HandleCommand("memory region", result)
self.assertFalse(result.Succeeded())
self.assertEqual(result.GetError(),
"error: 'memory region' takes one argument or \"--all\" option:\n"
"Usage: memory region <address-expression> (or --all)\n")
# We allow --all or an address argument, not both
interp.HandleCommand("memory region --all 0", result)
self.assertFalse(result.Succeeded())
self.assertRegexpMatches(result.GetError(),
"The \"--all\" option cannot be used when an address argument is given")
# Test that when the address fails to parse, we show an error and do not continue
interp.HandleCommand("memory region not_an_address", result)
self.assertFalse(result.Succeeded())
self.assertEqual(result.GetError(),
"error: invalid address argument \"not_an_address\": address expression \"not_an_address\" evaluation failed\n")
# Accumulate the results to compare with the --all output
all_regions = ""
# Now let's print the memory region starting at 0 which should always work.
interp.HandleCommand("memory region 0x0", result)
self.assertTrue(result.Succeeded())
self.assertRegexpMatches(result.GetOutput(), "\\[0x0+-")
all_regions += result.GetOutput()
# Keep printing memory regions until we printed all of them.
while True:
interp.HandleCommand("memory region", result)
if not result.Succeeded():
break
all_regions += result.GetOutput()
# Now that we reached the end, 'memory region' should again print the usage.
interp.HandleCommand("memory region", result)
self.assertFalse(result.Succeeded())
self.assertRegexpMatches(result.GetError(), "Usage: memory region <address\-expression> \(or \-\-all\)")
# --all should match what repeating the command gives you
interp.HandleCommand("memory region --all", result)
self.assertTrue(result.Succeeded())
self.assertEqual(result.GetOutput(), all_regions)
def test_no_overlapping_regions(self):
# In the past on Windows we were recording AllocationBase as the base address
# of the current region, not BaseAddress. So if a range of pages was split
# into regions you would see several regions with the same base address.
# This checks that this no longer happens (and it shouldn't happen on any
# other OS either).
self.setup_program()
regions = self.process().GetMemoryRegions()
num_regions = regions.GetSize()
if num_regions:
region = lldb.SBMemoryRegionInfo()
regions.GetMemoryRegionAtIndex(0, region)
previous_base = region.GetRegionBase()
previous_end = region.GetRegionEnd()
for idx in range(1, regions.GetSize()):
regions.GetMemoryRegionAtIndex(idx, region)
# Check that it does not overlap the previous region.
# This could happen if we got the base addresses or size wrong.
# Also catches the base addresses being the same.
region_base = region.GetRegionBase()
region_end = region.GetRegionEnd()
self.assertFalse(
(region_base < previous_end) and (previous_base < region_end),
"Unexpected overlapping memory region found.")
previous_base = region_base
previous_end = region_end
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