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[lldb] Fix error : unknown error while starting lldb's C/C++ repl #153560

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Merged
merged 5 commits into from
Aug 19, 2025
Merged

[lldb] Fix error : unknown error while starting lldb's C/C++ repl #153560

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6e75646
Fix unknown error while starting lldb's C/C++ repl
anutosh491 Aug 14, 2025
22f6e4d
formatting
anutosh491 Aug 14, 2025
0bd1ee6
Add tests to trigger correct warning
anutosh491 Aug 18, 2025
0a5ffd0
Merge branch 'main' into lldb-repl-unknown-error
anutosh491 Aug 18, 2025
e313d97
Merge branch 'main' into lldb-repl-unknown-error
anutosh491 Aug 19, 2025
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6 changes: 6 additions & 0 deletions lldb/source/Commands/CommandObjectExpression.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -640,9 +640,15 @@ void CommandObjectExpression::DoExecute(llvm::StringRef command,
repl_sp->SetValueObjectDisplayOptions(m_varobj_options);
}

if (!expr.empty()) {
result.GetOutputStream().Printf(
"Warning: trailing input is ignored in --repl mode\n");
}

IOHandlerSP io_handler_sp(repl_sp->GetIOHandler());
io_handler_sp->SetIsDone(false);
debugger.RunIOHandlerAsync(io_handler_sp);
return;
} else {
repl_error = Status::FromErrorStringWithFormat(
"Couldn't create a REPL for %s",
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10 changes: 10 additions & 0 deletions lldb/test/API/repl/clang/TestClangREPL.py
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Original file line number Diff line number Diff line change
Expand Up @@ -56,6 +56,16 @@ def test_basic_completion(self):

self.quit()

# Re-enter the REPL with trailing input to trigger warning.
self.child.send("expression --repl -l c -- 3 + 3\n")
self.child.expect_exact("Warning: trailing input is ignored in --repl mode\n")
self.child.expect_exact("1>")

# Evaluate another expression after warning.
self.expect_repl("4 + 4", substrs=["(int) $3 = 8"])

self.quit()

# PExpect uses many timeouts internally and doesn't play well
# under ASAN on a loaded machine..
@skipIfAsan
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