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"""Test that anonymous structs/unions are transparent to member access"""
import os, time
import unittest2
import lldb
from lldbtest import *
import lldbutil
class AnonymousTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
@dsym_test
def test_expr_nest_with_dsym(self):
self.buildDsym()
self.expr_nest()
@dsym_test
def test_expr_child_with_dsym(self):
self.buildDsym()
self.expr_child()
@dsym_test
def test_expr_grandchild_with_dsym(self):
self.buildDsym()
self.expr_grandchild()
@dsym_test
def test_expr_parent(self):
self.buildDsym()
self.expr_parent()
@unittest2.expectedFailure # llvm.org/pr15591
@dsym_test
def test_expr_null(self):
self.buildDsym()
self.expr_null()
@dsym_test
def test_child_by_name(self):
self.buildDsym()
self.child_by_name()
@skipIfGcc # llvm.org/pr15036: LLDB generates an incorrect AST layout for an anonymous struct when DWARF is generated by GCC
@skipIfIcc # llvm.org/pr15036: LLDB generates an incorrect AST layout for an anonymous struct when DWARF is generated by ICC
@dwarf_test
def test_expr_nest_with_dwarf(self):
self.buildDwarf()
self.expr_nest()
@dwarf_test
def test_expr_child_with_dwarf(self):
self.skipTest("Skipped because LLDB asserts due to an incorrect AST layout for an anonymous struct: see llvm.org/pr15036")
self.buildDwarf()
self.expr_child()
@skipIfGcc # llvm.org/pr15036: This particular regression was introduced by r181498
@skipIfIcc # llvm.org/pr15036: This particular regression was introduced by r181498
@dwarf_test
def test_expr_grandchild_with_dwarf(self):
self.buildDwarf()
self.expr_grandchild()
@dwarf_test
def test_expr_parent(self):
self.buildDwarf()
self.expr_parent()
@unittest2.expectedFailure # llvm.org/pr15591
@dwarf_test
def test_expr_null(self):
self.buildDwarf()
self.expr_null()
@dwarf_test
def test_child_by_name_with_dwarf(self):
self.buildDwarf()
self.child_by_name()
def setUp(self):
# Call super's setUp().
TestBase.setUp(self)
# Find the line numbers to break in main.c.
self.line0 = line_number('main.c', '// Set breakpoint 0 here.')
self.line1 = line_number('main.c', '// Set breakpoint 1 here.')
self.line2 = line_number('main.c', '// Set breakpoint 2 here.')
def common_setup(self, line):
exe = os.path.join(os.getcwd(), "a.out")
self.runCmd("file " + exe, CURRENT_EXECUTABLE_SET)
# Set breakpoints inside and outside methods that take pointers to the containing struct.
lldbutil.run_break_set_by_file_and_line (self, "main.c", 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'])
def expr_nest(self):
self.common_setup(self.line0)
# These should display correctly.
self.expect("expression n->foo.d", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["= 4"])
self.expect("expression n->b", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["= 2"])
def expr_child(self):
self.common_setup(self.line1)
# These should display correctly.
self.expect("expression c->foo.d", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["= 4"])
self.expect("expression c->grandchild.b", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["= 2"])
def expr_grandchild(self):
self.common_setup(self.line2)
# These should display correctly.
self.expect("expression g.child.foo.d", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["= 4"])
self.expect("expression g.child.b", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["= 2"])
def expr_parent(self):
if "clang" in self.getCompiler() and "3.4" in self.getCompilerVersion():
self.skipTest("llvm.org/pr16214 -- clang emits partial DWARF for structures referenced via typedef")
self.common_setup(self.line2)
# These should display correctly.
self.expect("expression pz", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["(type_z *) $", " = 0x0000"])
self.expect("expression z.y", VARIABLES_DISPLAYED_CORRECTLY,
substrs = ["(type_y) $", "dummy = 2"])
def expr_null(self):
self.common_setup(self.line2)
# This should fail because pz is 0, but it succeeds on OS/X.
# This fails on Linux with an upstream error "Couldn't dematerialize struct", as does "p *n" with "int *n = 0".
# Note that this can also trigger llvm.org/pr15036 when run interactively at the lldb command prompt.
self.expect("expression *(type_z *)pz",
substrs = ["Cannot access memory at address 0x0"], error = True)
def child_by_name(self):
exe = os.path.join (os.getcwd(), "a.out")
target = self.dbg.CreateTarget(exe)
self.assertTrue(target, VALID_TARGET)
break_in_main = target.BreakpointCreateBySourceRegex ('// Set breakpoint 2 here.', lldb.SBFileSpec("main.c"))
self.assertTrue(break_in_main, VALID_BREAKPOINT)
process = target.LaunchSimple (None, None, self.get_process_working_directory())
self.assertTrue (process, PROCESS_IS_VALID)
threads = lldbutil.get_threads_stopped_at_breakpoint (process, break_in_main)
if len(threads) != 1:
self.fail ("Failed to stop at breakpoint in main.")
thread = threads[0]
frame = thread.frames[0]
if not frame.IsValid():
self.fail ("Failed to get frame 0.")
var_n = frame.FindVariable("n")
if not var_n.IsValid():
self.fail ("Failed to get the variable 'n'")
elem_a = var_n.GetChildMemberWithName("a")
if not elem_a.IsValid():
self.fail ("Failed to get the element a in n")
error = lldb.SBError()
value = elem_a.GetValueAsSigned(error, 1000)
if not error.Success() or value != 0:
self.fail ("failed to get the correct value for element a in n")
if __name__ == '__main__':
import atexit
lldb.SBDebugger.Initialize()
atexit.register(lambda: lldb.SBDebugger.Terminate())
unittest2.main()
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