2568f45939
Specifically, allows the unwinder to handle the case where sc.function gets resolved with a pc that is one past the address range of the function (consistent with a tail call). However, there is no matching symbol. Adds eSymbolContextTailCall to provide callers with control over the scope of symbol resolution and to allow ResolveSymbolContextForAddress to handle tail calls since this routine is common to unwind and disassembly. llvm-svn: 191102
252 lines
10 KiB
Python
252 lines
10 KiB
Python
"""Test that lldb functions correctly after the inferior has asserted."""
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import os, time
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import unittest2
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import lldb, lldbutil
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from lldbtest import *
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class AssertingInferiorTestCase(TestBase):
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mydir = os.path.join("functionalities", "inferior-assert")
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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def test_inferior_asserting_dsym(self):
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"""Test that lldb reliably catches the inferior asserting (command)."""
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self.buildDsym()
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self.inferior_asserting()
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def test_inferior_asserting_dwarf(self):
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"""Test that lldb reliably catches the inferior asserting (command)."""
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self.buildDwarf()
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self.inferior_asserting()
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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def test_inferior_asserting_registers_dsym(self):
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"""Test that lldb reliably reads registers from the inferior after asserting (command)."""
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self.buildDsym()
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self.inferior_asserting_registers()
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@expectedFailureFreeBSD('llvm.org/pr17184')
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def test_inferior_asserting_register_dwarf(self):
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"""Test that lldb reliably reads registers from the inferior after asserting (command)."""
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self.buildDwarf()
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self.inferior_asserting_registers()
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@skipIfGcc # Avoid xpasses as the verion of libc used on the gcc buildbot has the required function symbols.
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@expectedFailureFreeBSD # ResolveSymbolContextForAddress can fail using ELF with stripped function symbols.
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@expectedFailureLinux # ResolveSymbolContextForAddress can fail using ELF with stripped function symbols.
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def test_inferior_asserting_disassemble(self):
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"""Test that lldb reliably disassembles frames after asserting (command)."""
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self.buildDefault()
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self.inferior_asserting_disassemble()
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@python_api_test
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def test_inferior_asserting_python(self):
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"""Test that lldb reliably catches the inferior asserting (Python API)."""
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self.buildDefault()
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self.inferior_asserting_python()
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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def test_inferior_asserting_expr(self):
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"""Test that the lldb expression interpreter can read from the inferior after asserting (command)."""
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self.buildDsym()
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self.inferior_asserting_expr()
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def test_inferior_asserting_expr(self):
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"""Test that the lldb expression interpreter can read from the inferior after asserting (command)."""
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self.buildDwarf()
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self.inferior_asserting_expr()
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@unittest2.skipUnless(sys.platform.startswith("darwin"), "requires Darwin")
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def test_inferior_asserting_step(self):
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"""Test that lldb functions correctly after stepping through a call to assert()."""
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self.buildDsym()
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self.inferior_asserting_step()
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def test_inferior_asserting_step(self):
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"""Test that lldb functions correctly after stepping through a call to assert()."""
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self.buildDwarf()
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self.inferior_asserting_step()
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def set_breakpoint(self, line):
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lldbutil.run_break_set_by_file_and_line (self, "main.c", line, num_expected_locations=1, loc_exact=True)
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def check_stop_reason(self):
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stop_reason = 'stop reason = signal SIGABRT'
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# The stop reason of the thread should be an abort signal or exception.
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self.expect("thread list", STOPPED_DUE_TO_ASSERT,
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substrs = ['stopped',
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stop_reason])
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return stop_reason
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def setUp(self):
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# Call super's setUp().
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TestBase.setUp(self)
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# Find the line number of the call to assert.
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self.line = line_number('main.c', '// Assert here.')
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def inferior_asserting(self):
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"""Inferior asserts upon launching; lldb should catch the event and stop."""
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exe = os.path.join(os.getcwd(), "a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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self.runCmd("run", RUN_SUCCEEDED)
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stop_reason = self.check_stop_reason()
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# And it should report a backtrace that includes the assert site.
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self.expect("thread backtrace all",
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substrs = [stop_reason, 'main', 'argc', 'argv'])
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# And it should report the correct line number.
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self.expect("thread backtrace all",
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substrs = [stop_reason,
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'main.c:%d' % self.line])
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def inferior_asserting_python(self):
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"""Inferior asserts upon launching; lldb should catch the event and stop."""
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exe = os.path.join(os.getcwd(), "a.out")
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Now launch the process, and do not stop at entry point.
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# Both argv and envp are null.
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process = target.LaunchSimple(None, None, os.getcwd())
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if process.GetState() != lldb.eStateStopped:
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self.fail("Process should be in the 'stopped' state, "
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"instead the actual state is: '%s'" %
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lldbutil.state_type_to_str(process.GetState()))
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thread = lldbutil.get_stopped_thread(process, lldb.eStopReasonSignal)
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if not thread:
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self.fail("Fail to stop the thread upon assert")
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if self.TraceOn():
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lldbutil.print_stacktrace(thread)
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def inferior_asserting_registers(self):
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"""Test that lldb can read registers after asserting."""
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exe = os.path.join(os.getcwd(), "a.out")
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self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
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self.runCmd("run", RUN_SUCCEEDED)
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self.check_stop_reason()
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# lldb should be able to read from registers from the inferior after asserting.
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self.expect("register read eax",
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substrs = ['eax = 0x'])
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def inferior_asserting_disassemble(self):
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"""Test that lldb can disassemble frames after asserting."""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Launch the process, and do not stop at the entry point.
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target.LaunchSimple(None, None, os.getcwd())
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self.check_stop_reason()
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process = target.GetProcess()
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self.assertTrue(process.IsValid(), "current process is valid")
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thread = process.GetThreadAtIndex(0)
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self.assertTrue(thread.IsValid(), "current thread is valid")
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# lldb should be able to disassemble frames from the inferior after asserting.
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for frame in thread:
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self.assertTrue(frame.IsValid(), "current frame is valid")
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self.runCmd("frame select " + str(frame.GetFrameID()), RUN_SUCCEEDED)
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self.expect("disassemble -a %s" % frame.GetPC(),
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substrs = ['->', frame.GetFunctionName()])
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def check_expr_in_main(self, thread):
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depth = thread.GetNumFrames()
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for i in range(depth):
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frame = thread.GetFrameAtIndex(i)
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self.assertTrue(frame.IsValid(), "current frame is valid")
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if self.TraceOn():
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print "Checking if function %s is main" % frame.GetFunctionName()
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if 'main' == frame.GetFunctionName():
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frame_id = frame.GetFrameID()
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self.runCmd("frame select " + str(frame_id), RUN_SUCCEEDED)
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self.expect("p argc", substrs = ['(int)', ' = 1'])
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self.expect("p hello_world", substrs = ['Hello'])
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self.expect("p argv[0]", substrs = ['a.out'])
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self.expect("p null_ptr", substrs = ['= 0x0'])
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return True
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return False
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def inferior_asserting_expr(self):
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"""Test that the lldb expression interpreter can read symbols after asserting."""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Launch the process, and do not stop at the entry point.
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target.LaunchSimple(None, None, os.getcwd())
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self.check_stop_reason()
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process = target.GetProcess()
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self.assertTrue(process.IsValid(), "current process is valid")
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thread = process.GetThreadAtIndex(0)
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self.assertTrue(thread.IsValid(), "current thread is valid")
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# The lldb expression interpreter should be able to read from addresses of the inferior after a call to assert().
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self.assertTrue(self.check_expr_in_main(thread), "cannot find 'main' in the backtrace")
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def inferior_asserting_step(self):
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"""Test that lldb functions correctly after stepping through a call to assert()."""
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exe = os.path.join(os.getcwd(), "a.out")
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# Create a target by the debugger.
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target = self.dbg.CreateTarget(exe)
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self.assertTrue(target, VALID_TARGET)
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# Launch the process, and do not stop at the entry point.
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self.set_breakpoint(self.line)
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target.LaunchSimple(None, None, os.getcwd())
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self.expect("thread list", STOPPED_DUE_TO_BREAKPOINT,
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substrs = ['main.c:%d' % self.line,
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'stop reason = breakpoint'])
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self.runCmd("next")
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stop_reason = self.check_stop_reason()
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# lldb should be able to read from registers from the inferior after asserting.
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if "x86_64" in self.getArchitecture():
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self.expect("register read rbp", substrs = ['rbp = 0x'])
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if "i386" in self.getArchitecture():
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self.expect("register read ebp", substrs = ['ebp = 0x'])
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process = target.GetProcess()
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self.assertTrue(process.IsValid(), "current process is valid")
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thread = process.GetThreadAtIndex(0)
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self.assertTrue(thread.IsValid(), "current thread is valid")
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# The lldb expression interpreter should be able to read from addresses of the inferior after a call to assert().
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self.assertTrue(self.check_expr_in_main(thread), "cannot find 'main' in the backtrace")
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# And it should report the correct line number.
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self.expect("thread backtrace all",
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substrs = [stop_reason,
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'main.c:%d' % self.line])
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if __name__ == '__main__':
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import atexit
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lldb.SBDebugger.Initialize()
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atexit.register(lambda: lldb.SBDebugger.Terminate())
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unittest2.main()
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