71536fd031
Right now when running `expr --top-level -- void foo() {}`, LLDB just prints a cryptic
`error: Couldn't find $__lldb_expr() in the module` error. The reason for that is
that if we don't have a running process, we try to set our execution policy to always use the
IR interpreter (ExecutionPolicyNever) which works even without a process. However
that code didn't consider the special ExecutionPolicyTopLevel which we use for
top-level expressions. By changing the execution policy to ExecutionPolicyNever,
LLDB thinks we're actually trying to interpret a normal expression inside our
`$__lldb_expr` function and then fails when looking for it.
This just adds an exception for top-level expressions to that code and a bunch of tests.
Reviewed By: shafik
Differential Revision: https://reviews.llvm.org/D91723
105 lines
3.4 KiB
Python
105 lines
3.4 KiB
Python
"""
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Test top-level expressions.
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"""
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import unittest2
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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 TopLevelExpressionsTestCase(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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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 to break for main.c.
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self.line = line_number('main.cpp',
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'// Set breakpoint here')
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self.dummy_line = line_number('dummy.cpp',
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'// Set breakpoint here')
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# Disable confirmation prompt to avoid infinite wait
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self.runCmd("settings set auto-confirm true")
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self.addTearDownHook(
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lambda: self.runCmd("settings clear auto-confirm"))
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def build_and_run(self):
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"""Test top-level expressions."""
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self.build()
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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=False)
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self.runCmd("run", RUN_SUCCEEDED)
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def run_dummy(self):
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self.runCmd("file " + self.getBuildArtifact("dummy"),
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CURRENT_EXECUTABLE_SET)
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lldbutil.run_break_set_by_file_and_line(
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self,
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"dummy.cpp",
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self.dummy_line,
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num_expected_locations=1,
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loc_exact=False)
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self.runCmd("run", RUN_SUCCEEDED)
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@add_test_categories(['pyapi'])
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@skipIf(debug_info="gmodules") # not relevant
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@skipIf(oslist=["windows"]) # Error in record layout on Windows
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def test_top_level_expressions(self):
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self.build_and_run()
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resultFromCode = self.frame().EvaluateExpression("doTest()").GetValueAsUnsigned()
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self.runCmd("kill")
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self.run_dummy()
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codeFile = open('test.cpp', 'r')
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expressions = []
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current_expression = ""
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for line in codeFile:
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if line.startswith("// --"):
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expressions.append(current_expression)
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current_expression = ""
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else:
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current_expression += line
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options = lldb.SBExpressionOptions()
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options.SetLanguage(lldb.eLanguageTypeC_plus_plus)
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options.SetTopLevel(True)
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for expression in expressions:
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self.frame().EvaluateExpression(expression, options)
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resultFromTopLevel = self.frame().EvaluateExpression("doTest()")
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self.assertTrue(resultFromTopLevel.IsValid())
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self.assertEqual(
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resultFromCode,
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resultFromTopLevel.GetValueAsUnsigned())
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def test_top_level_expression_without_target(self):
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self.expect("expr --top-level -- void func() {}", error=True,
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substrs=["Top-level code needs to be inserted into a runnable target"])
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# FIXME: This doesn't actually generate any code, so LLDB should probably
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# allow these expressions.
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self.expect("expr --top-level -- template<typename T> struct StructT { T m; };", error=True,
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substrs=["Top-level code needs to be inserted into a runnable target"])
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self.expect("expr --top-level -- struct Struct { int i; };", error=True,
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substrs=["Top-level code needs to be inserted into a runnable target"])
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