Jonas Devlieghere 1a216fb15a [lldb] Don't print script output twice in HandleCommand
When executing a script command in HandleCommand(s) we currently print
its output twice
You can see this issue in action when adding a breakpoint command:

(lldb) b main
Breakpoint 1: where = main.out`main + 13 at main.cpp:2:3, address = 0x0000000100003fad
(lldb) break command add 1 -o "script print(\"Hey!\")"
(lldb) r
Process 76041 launched: '/tmp/main.out' (x86_64)
Hey!
(lldb)  script print("Hey!")
Hey!
Process 76041 stopped

The issue is caused by HandleCommands using a temporary
CommandReturnObject and one of the commands (`script` in this case)
setting an immediate output stream. This causes the result to be printed
twice: once directly to the immediate output stream and once when
printing the result of HandleCommands.

This patch fixes the issue by introducing a new option to suppress
immediate output for temporary CommandReturnObjects.

Differential revision: https://reviews.llvm.org/D103349
2021-06-08 13:57:39 -07:00

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# REQUIRES: lua
# RUN: mkdir -p %t
# RUN: echo "int main() { return 0; }" | %clang_host -x c - -o %t/foo
# RUN: echo "int main() { return 0; }" | %clang_host -x c - -o %t/bar
# RUN: %lldb --script-language lua -o "file %t/bar" -o "file %t/foo" -s %S/Inputs/nested_sessions.in -s %S/Inputs/nested_sessions_2.in 2>&1 | FileCheck %s
# CHECK: script
# CHECK-NEXT: foo foo
# CHECK-NEXT: foo bar
# CHECK-NEXT: foo bar
# CHECK: script
# CHECK-NEXT: bar bar