[lldb-dev] Failing LIT-based lldb-mi tests

[Adrian Prantl via lldb-dev]

> On Aug 14, 2018, at 12:11 PM, Александр Поляков <polyakov.alx at gmail.com> wrote:
> 
> It seems that the real problem is that sometimes lldb-mi can't launch a process:
> 
> build/bin/lldb-mi --synchronous a.out < llvm/tools/lldb/lit/tools/lldb-mi/exec/exec-step-instruction.test 
> (gdb)
> -file-exec-and-symbols "a.out"
> ^done
> (gdb)
> ^done
> (gdb)
> =library-loaded,id="/home/alexander/workspace/gsoc/a.out",target-name="/home/alexander/workspace/gsoc/a.out",host-name="/home/alexander/workspace/gsoc/a.out",symbols-loaded="0",loaded_addr="-",size="0"
> ^done
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^done,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="0x00000000004004df",func="main",file="main.c",fullname="/home/alexander/workspace/gsoc/llvm/tools/lldb/lit/tools/lldb-mi/exec/inputs/main.c",line="6",times="0",original-location="main"}
> (gdb)
> =breakpoint-modified,bkpt={number="1",type="breakpoint",disp="keep",enabled="y",addr="0x00000000004004df",func="main",file="main.c",fullname="/home/alexander/workspace/gsoc/llvm/tools/lldb/lit/tools/lldb-mi/exec/inputs/main.c",line="6",times="0",original-location="main"}
> (gdb)
> ^done
> (gdb)
> ^error,msg="process launch failed: 'A' packet returned an error: -1"

Do you think you might be able to improve the error message here and get at the underlying failure?

-- adrian

> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^error,msg="Command 'exec-step-instruction'. Thread ID invalid"
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^error,msg="Command 'exec-next-instruction'. Thread ID invalid"
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^error,msg="this SBThread object is invalid"
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> ^done
> (gdb)
> 
> exec-run executes fine in synchronous mode(the only bad thing here is that lldb-mi doesn't react to any external events like SIGSTOP - ctrl+C, while lldb does). All previous logs were made in asynchronous mode and are wrong.
> 
> On Tue, Aug 14, 2018 at 2:36 AM Adrian Prantl <aprantl at apple.com <mailto:aprantl at apple.com>> wrote:
> 
> 
>> On Aug 13, 2018, at 4:19 PM, Александр Поляков <polyakov.alx at gmail.com <mailto:polyakov.alx at gmail.com>> wrote:
>> 
>> Yes, I do, I'm able to pass any command to lldb-mi before the breakpoint is hit. I guess that making exec-run to block the control until the process stops might be the solution we are looking for.
> 
> Right. I believe that it should (in synchronous mode) behave like "run" in the normal lldb command interpreter and block until the process has stopped. You could look at differences in the implementation of -exec-run and "run" in the command interpreter first.
> 
> -- adrian
> 
> 
> 
> -- 
> Alexander

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