d616a6bd10
The `--allow-jit` flag allows the user to force the IR interpreter to run the provided expression. The `--top-level` flag parses and injects the code as if its in the top level scope of a source file. Both flags just change the ExecutionPolicy of the expression: * `--allow-jit true` -> doesn't change anything (its the default) * `--allow-jit false` -> ExecutionPolicyNever * `--top-level` -> ExecutionPolicyTopLevel Passing `--allow-jit false` and `--top-level` currently causes the `--top-level` to silently overwrite the ExecutionPolicy value that was set by `--allow-jit false`. There isn't any ExecutionPolicy value that says "top-level but only interpret", so I would say we reject this combination of flags until someone finds time to refactor top-level feature out of the ExecutionPolicy enum. The SBExpressionOptions suffer from a similar symptom as `SetTopLevel` and `SetAllowJIT` just silently disable each other. But those functions don't have any error handling, so not a lot we can do about this in the meantime. Reviewed By: labath, kastiglione Differential Revision: https://reviews.llvm.org/D91780
96 lines
4.0 KiB
Python
96 lines
4.0 KiB
Python
"""
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Test that --allow-jit=false does disallow JITting:
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"""
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import lldb
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import lldbsuite.test.lldbutil as lldbutil
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from lldbsuite.test.lldbtest import *
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from lldbsuite.test.decorators import *
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class TestAllowJIT(TestBase):
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mydir = TestBase.compute_mydir(__file__)
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# If your test case doesn't stress debug info, the
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# set this to true. That way it won't be run once for
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# each debug info format.
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NO_DEBUG_INFO_TESTCASE = True
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def test_allow_jit_expr_command(self):
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"""Test the --allow-jit command line flag"""
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self.build()
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self.main_source_file = lldb.SBFileSpec("main.c")
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self.expr_cmd_test()
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def test_allow_jit_options(self):
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"""Test the SetAllowJIT SBExpressionOption setting"""
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self.build()
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self.main_source_file = lldb.SBFileSpec("main.c")
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self.expr_options_test()
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def expr_cmd_test(self):
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(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self,
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"Set a breakpoint here", self.main_source_file)
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frame = thread.GetFrameAtIndex(0)
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# First make sure we can call the function with
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interp = self.dbg.GetCommandInterpreter()
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self.expect("expr --allow-jit 1 -- call_me(10)",
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substrs = ["(int) $", "= 18"])
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# Now make sure it fails with the "can't IR interpret message" if allow-jit is false:
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self.expect("expr --allow-jit 0 -- call_me(10)",
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error=True,
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substrs = ["Can't evaluate the expression without a running target"])
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def expr_options_test(self):
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(target, process, thread, bkpt) = lldbutil.run_to_source_breakpoint(self,
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"Set a breakpoint here", self.main_source_file)
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frame = thread.GetFrameAtIndex(0)
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# First make sure we can call the function with the default option set.
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options = lldb.SBExpressionOptions()
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# Check that the default is to allow JIT:
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self.assertEqual(options.GetAllowJIT(), True, "Default is true")
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# Now use the options:
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result = frame.EvaluateExpression("call_me(10)", options)
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self.assertSuccess(result.GetError())
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self.assertEqual(result.GetValueAsSigned(), 18, "got the right value.")
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# Now disallow JIT and make sure it fails:
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options.SetAllowJIT(False)
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# Check that we got the right value:
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self.assertEqual(options.GetAllowJIT(), False, "Got False after setting to False")
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# Again use it and ensure we fail:
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result = frame.EvaluateExpression("call_me(10)", options)
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self.assertTrue(result.GetError().Fail(), "expression failed with no JIT")
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self.assertIn("Can't evaluate the expression without a running target", result.GetError().GetCString(), "Got right error")
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# Finally set the allow JIT value back to true and make sure that works:
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options.SetAllowJIT(True)
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self.assertEqual(options.GetAllowJIT(), True, "Set back to True correctly")
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# And again, make sure this works:
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result = frame.EvaluateExpression("call_me(10)", options)
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self.assertSuccess(result.GetError())
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self.assertEqual(result.GetValueAsSigned(), 18, "got the right value.")
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def test_allow_jit_with_top_level(self):
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"""Test combined --allow-jit and --top-level flags"""
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# Can't force interpreting for top-level expressions which are always
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# injected.
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self.expect("expr --allow-jit false --top-level -- int i;", error=True,
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substrs=["Can't disable JIT compilation for top-level expressions."])
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self.build()
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lldbutil.run_to_source_breakpoint(self, "Set a breakpoint here", lldb.SBFileSpec("main.c"))
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# Allowing JITing for top-level expressions is redundant but should work.
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self.expect("expr --allow-jit true --top-level -- int top_level_f() { return 2; }")
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# Make sure we actually declared a working top-level function.
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self.expect_expr("top_level_f()", result_value="2")
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