[swift-dev] Debugger (lldb or gdb) does not show variable value in swift code

[Sam Ding]

Hi Alex,

Tested the master branch, which has the same behavior as V4.0 branch.
Just wonder how to debug the compiler swift code if the debugger is not
able to show the values.


Thanks,

Sam Ding,
Linux on z Systems  Open Source Ecosystem
IBM Toronto Lab,
email: samding at ca.ibm.com
phone: (905)413-2947



From:	Alex Blewitt <alblue at apple.com>
To:	Sam Ding <samding at ca.ibm.com>
Cc:	swift-dev <swift-dev at swift.org>
Date:	10/07/2017 11:33 AM
Subject:	Re: [swift-dev] Debugger (lldb or gdb) does not show variable
            value in swift code
Sent by:	alblue at apple.com



Do you see the same issue if you build from master?

Alex

      On 7 Oct 2017, at 00:30, Sam Ding via swift-dev <swift-dev at swift.org>
      wrote:



      Hi,

      I build swift compiler (v4.0) with debug mode ("-d"), however when
      debugging compiler swift code, it can not
      show the variable value. Here is an example:


                  frame #0: 0x00007ffff761d50c
                  libswiftCore.so`_allocateUninitializedArray<A>
                  (builtinCount=1) at Arrays.swift:3347
                  3344 func _allocateUninitializedArray<Element>(_
                  builtinCount: Builtin.Word)
                  3345 -> (Array<Element>, Builtin.RawPointer) {
                  3346 let count = Int(builtinCount)
                  -> 3347 if count > 0 {
                  3348 // Doing the actual buffer allocation outside of the
                  array.uninitialized
                  3349 // semantics function enables stack propagation of
                  the buffer.
                  3350 let bufferObject = Builtin.allocWithTailElems_1(
                  Target 0: (ww) stopped.
                  (lldb) p count
                  error: in auto-import:
                  failed to get module 'Builtin' from AST context
                  (lldb)

      This happens on both x86_64 and s390x platforms.
      Is there any way to make the debugger show the variable values?

      Thanks,

      Sam Ding,
      Linux on z Systems Open Source Ecosystem
      IBM Toronto Lab,
      email: samding at ca.ibm.com
      phone: (905)413-2947
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