[swift-lldb-dev] Cannot use swift REPL from stand alone lldb build

[Todd Fiala]

Hi Rex,



On Thu, Oct 6, 2016 at 5:22 PM, Rex Fenley via swift-lldb-dev <
swift-lldb-dev at swift.org> wrote:

> Hi!
>
> I run lldb, platform select ios-simulator, connect to the right simulator
> and attach to my app and when trying to try to do anything in the repl I
> get the following kind of error at the bottom for an Abort, please help!
> The repl works fine in Xcode, not sure why it wouldn't work in this case.
>
> (lldb) process attach -n <App Name> --waitfor
>
> Process 27857 stopped
>
> * thread #1: tid = 0x1eadf9, 0x00007fff6d4ca5e2 dyld`pread + 10, stop
> reason = signal SIGSTOP
>
>     frame #0: 0x00007fff6d4ca5e2 dyld`pread + 10
>
> dyld`pread:
>
> ->  0x7fff6d4ca5e2 <+10>: jae    0x7fff6d4ca5ec            ; <+20>
>
>     0x7fff6d4ca5e4 <+12>: movq   %rax, %rdi
>
>     0x7fff6d4ca5e7 <+15>: jmp    0x7fff6d4c9c01            ; cerror
>
>     0x7fff6d4ca5ec <+20>: retq
>
>
> Executable module set to "/Users/Rex/Library/Developer/
> CoreSimulator/Devices/ACC5BC4E-C7B1-4635-A591-
> 6BE65F05B7EC/data/Containers/Bundle/Application/ECA295A8-
> DB79-4A4A-8ADE-0E616CAB0093/<App Name>.app/<App Name>".
>
> Architecture set to: x86_64h-apple-ios.
>
> (lldb) continue
>
> Process 27857 resuming
>
> (lldb) process interrupt
>
> Process 27857 stopped
>
> * thread #1: tid = 0x1eadf9, 0x0000000115929f72
> libsystem_kernel.dylib`mach_msg_trap + 10, stop reason = signal SIGSTOP
>
>     frame #0: 0x0000000115929f72 libsystem_kernel.dylib`mach_msg_trap + 10
>
> libsystem_kernel.dylib`mach_msg_trap:
>
> ->  0x115929f72 <+10>: retq
>
>     0x115929f73 <+11>: nop
>
>
> libsystem_kernel.dylib`mach_msg_overwrite_trap:
>
>     0x115929f74 <+0>:  movq   %rcx, %r10
>
>     0x115929f77 <+3>:  movl   $0x1000020, %eax          ; imm = 0x1000020
>
> (lldb) repl
>
>   1> import Foundation
>
> warning: Swift error in module <App Name>.
>
> Debug info from this module will be unavailable in the debugger.
>
>
>
This part looks suspicious.  I'm assuming <App Name> is really something
else on your end.  If you do have a space in the name, you might want to
try without a space as something in the toolchain might be mishandling
spaces in pathnames.


> Assertion failed: (!HasFatalErrors()), function GetNumModuleSearchPaths,
> file /Users/Rex/Documents/projects/swift-lldb/lldb/source/Symbol/SwiftASTContext.cpp,
> line 3587.
>
> Abort trap: 6
>
>
>
This bit above definitely means something is wrong.  I suspect it's a
cascading error for the debugger not being able to find debug info.

There are a couple members of the team that will likely have some thoughts
on what to try.  I'll make sure they see this tomorrow.

Thanks for passing that along,
Todd


> --
>
> Rex Fenley  |  IOS DEVELOPER
>
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>


-- 
-Todd
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