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[SR-8374] Swift 4.2 lldb po failures #4364

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keith opened this issue Jul 26, 2018 · 8 comments
Closed

[SR-8374] Swift 4.2 lldb po failures #4364

keith opened this issue Jul 26, 2018 · 8 comments
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@dcci
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bug Something isn't working LLDB for Swift

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@keith
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keith commented Jul 26, 2018

Previous ID SR-8374
Radar rdar://problem/42626690
Original Reporter @keith
Type Bug
Status Closed
Resolution Cannot Reproduce
Environment

Xcode 10 beta 4

Additional Detail from JIRA
Votes 0
Component/s LLDB for Swift
Labels Bug
Assignee @dcci
Priority Medium

md5: 1666c5c21076e977fc2aa5be2cb95d0f

Issue Description:

If you compile this code with Xcode 10b4 with:

swiftc -g foo.swift -sdk `xcrun --show-sdk-path -sdk macosx`

import CoreFoundation
import Foundation

let a: CFString = "hi" as NSString
let b = a as String

print("hi")

In lldb if you run:

lldb -- ./foo
(lldb) br set -f foo.swift -l 7
(lldb) r
(lldb) fr v
(lldb) po a

You get these errors:

(lldb) po a
error: in auto-import:
failed to get module 'foo' from AST context
(lldb) po b
error: in auto-import:
failed to get module 'foo' from AST context
(lldb) fr v # no output
@belkadan
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@swift-ci create

@dcci
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Mannequin

dcci mannequin commented Jul 26, 2018

Looking at this.

@dcci
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Mannequin

dcci mannequin commented Jul 26, 2018

Cannot reproduce on ToT on Mojave.

(lldb) po a
hi

(lldb) frame var a
(NSTaggedPointerString) a = 0x8c712a44ee9f9df3 "hi"
(lldb) frame var b
(String) b = "hi"
(lldb) p a
(NSTaggedPointerString) $R2 = 0x8c712a44ee9f9df3 "hi"
(lldb) p b
(String) $R4 = "hi"
(lldb) frame var b
(String) b = "hi"

Can you try updating your source? I think this might be a mismatch between lldb and swift, but I'm not sure.

@dcci
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Mannequin

dcci mannequin commented Jul 26, 2018

Just to make sure, this is where I'm at:

locals-Mac-Pro:bin davide$ ./swiftc --version
Swift version 4.2-dev (LLVM a4d539e482, Clang 773ac0251a, Swift 31f2c75bb7)
locals-Mac-Pro:bin davide$ lldb 
locals-Mac-Pro:bin davide$ ../../lldb-macosx-x86_64/bin/lldb --version
lldb version 6.0.0 (https://github.com/apple/swift-lldb.git revision 873a338b5d8b74ed504c5e02e52d6972fe9bc513)
  Swift-4.2 (revision 31f2c75bb7928042bce90195b6473dbfe0188387)
  clang revision 773ac0251a7ea94c0b58d96353d4210a7eb2aeef
  llvm revision a4d539e482ca76290f3db6b775203ae230b34d42

(swift -> master branch / lldb -> stable branch)

@keith
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keith commented Jul 26, 2018

Sorry I must have built / tested with different versions, I didn't think that was the case, but I can't reproduce anymore with Xcode 10b4's Swift and lldb

@dcci
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Mannequin

dcci mannequin commented Jul 26, 2018

Also tried within Xcode beta 4 and I get the same.

@dcci
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Mannequin

dcci mannequin commented Jul 26, 2018

yay. Thanks.

@keith
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keith commented Jul 26, 2018

Sorry about that!

@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
@shahmishal shahmishal transferred this issue from apple/swift May 5, 2022
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@keith @belkadan