f3d43eca34
As suggested in post-commit review on https://reviews.llvm.org/D129272. * Rename the test case. * Simplify the overlap check. * Correct assertion.
122 lines
4.8 KiB
Python
122 lines
4.8 KiB
Python
"""
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Test the 'memory region' command.
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"""
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import lldb
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from lldbsuite.test.decorators import *
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test import lldbutil
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class MemoryCommandRegion(TestBase):
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NO_DEBUG_INFO_TESTCASE = True
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def setUp(self):
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TestBase.setUp(self)
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# Find the line number to break for main.c.
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self.line = line_number(
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'main.cpp',
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'// Run here before printing memory regions')
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def test_help(self):
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""" Test that help shows you must have one of address or --all, not both."""
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self.expect("help memory region",
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substrs=["memory region <address-expression>",
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"memory region -a"])
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def setup_program(self):
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self.build()
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# Set breakpoint in main and run
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self.runCmd("file " + self.getBuildArtifact("a.out"), CURRENT_EXECUTABLE_SET)
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lldbutil.run_break_set_by_file_and_line(
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self, "main.cpp", self.line, num_expected_locations=-1, loc_exact=True)
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self.runCmd("run", RUN_SUCCEEDED)
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def test_command(self):
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self.setup_program()
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interp = self.dbg.GetCommandInterpreter()
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result = lldb.SBCommandReturnObject()
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# Test that the first 'memory region' command prints the usage.
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interp.HandleCommand("memory region", result)
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self.assertFalse(result.Succeeded())
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self.assertEqual(result.GetError(),
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"error: 'memory region' takes one argument or \"--all\" option:\n"
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"Usage: memory region <address-expression> (or --all)\n")
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# We allow --all or an address argument, not both
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interp.HandleCommand("memory region --all 0", result)
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self.assertFalse(result.Succeeded())
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self.assertRegexpMatches(result.GetError(),
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"The \"--all\" option cannot be used when an address argument is given")
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# Test that when the address fails to parse, we show an error and do not continue
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interp.HandleCommand("memory region not_an_address", result)
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self.assertFalse(result.Succeeded())
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self.assertEqual(result.GetError(),
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"error: invalid address argument \"not_an_address\": address expression \"not_an_address\" evaluation failed\n")
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# Accumulate the results to compare with the --all output
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all_regions = ""
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# Now let's print the memory region starting at 0 which should always work.
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interp.HandleCommand("memory region 0x0", result)
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self.assertTrue(result.Succeeded())
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self.assertRegexpMatches(result.GetOutput(), "\\[0x0+-")
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all_regions += result.GetOutput()
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# Keep printing memory regions until we printed all of them.
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while True:
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interp.HandleCommand("memory region", result)
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if not result.Succeeded():
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break
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all_regions += result.GetOutput()
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# Now that we reached the end, 'memory region' should again print the usage.
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interp.HandleCommand("memory region", result)
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self.assertFalse(result.Succeeded())
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self.assertRegexpMatches(result.GetError(), "Usage: memory region <address\-expression> \(or \-\-all\)")
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# --all should match what repeating the command gives you
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interp.HandleCommand("memory region --all", result)
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self.assertTrue(result.Succeeded())
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self.assertEqual(result.GetOutput(), all_regions)
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def test_no_overlapping_regions(self):
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# In the past on Windows we were recording AllocationBase as the base address
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# of the current region, not BaseAddress. So if a range of pages was split
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# into regions you would see several regions with the same base address.
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# This checks that this no longer happens (and it shouldn't happen on any
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# other OS either).
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self.setup_program()
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regions = self.process().GetMemoryRegions()
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num_regions = regions.GetSize()
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if num_regions:
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region = lldb.SBMemoryRegionInfo()
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regions.GetMemoryRegionAtIndex(0, region)
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previous_base = region.GetRegionBase()
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previous_end = region.GetRegionEnd()
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for idx in range(1, regions.GetSize()):
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regions.GetMemoryRegionAtIndex(idx, region)
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# Check that it does not overlap the previous region.
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# This could happen if we got the base addresses or size wrong.
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# Also catches the base addresses being the same.
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region_base = region.GetRegionBase()
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region_end = region.GetRegionEnd()
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self.assertFalse(
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(region_base < previous_end) and (previous_base < region_end),
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"Unexpected overlapping memory region found.")
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previous_base = region_base
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previous_end = region_end |