=backtrace #61 make use of swift-backtrace

[ktoso]

With removal of fault handling in #51 we need something to print backtraces

Motivation:

• we need backtraces to keep sane ¯\(ツ)/¯
• We should rely on and help improve swift-backtrace.

Modifications:

Use the Backtrace library.

Result:

Nice backtraces.

Fatal error: Failing on purpose: file /code/Tests/DistributedActorsTests/ActorDeferTests.swift, line 54
Current stack trace:
0    libswiftCore.so                    0x00007f7027fa43c0 swift_reportError + 50
1    libswiftCore.so                    0x00007f70280150b0 _swift_stdlib_reportFatalErrorInFile + 115
2    libswiftCore.so                    0x00007f7027f3951e <unavailable> + 3515678
3    libswiftCore.so                    0x00007f7027f39697 <unavailable> + 3516055
4    libswiftCore.so                    0x00007f7027d2ee3d <unavailable> + 1375805
5    libswiftCore.so                    0x00007f7027f10478 <unavailable> + 3347576
6    libswiftCore.so                    0x00007f7027d2e1d9 <unavailable> + 1372633
7    swift-distributed-actorsPackageTests.xctest 0x00005605c639bb49 <unavailable> + 6896457
8    swift-distributed-actorsPackageTests.xctest 0x00005605c639be49 <unavailable> + 6897225
9    swift-distributed-actorsPackageTests.xctest 0x00005605c632d6bc <unavailable> + 6444732
10   swift-distributed-actorsPackageTests.xctest 0x00005605c639c2f4 <unavailable> + 6898420
11   swift-distributed-actorsPackageTests.xctest 0x00005605c603270e <unavailable> + 3319566
12   swift-distributed-actorsPackageTests.xctest 0x00005605c62c70a5 <unavailable> + 6025381
13   swift-distributed-actorsPackageTests.xctest 0x00005605c62c5c11 <unavailable> + 6020113
14   swift-distributed-actorsPackageTests.xctest 0x00005605c62c5861 <unavailable> + 6019169
15   swift-distributed-actorsPackageTests.xctest 0x00005605c5ffaf08 <unavailable> + 3092232
16   swift-distributed-actorsPackageTests.xctest 0x00005605c61cf0fd <unavailable> + 5009661
17   swift-distributed-actorsPackageTests.xctest 0x00005605c61cf4bf <unavailable> + 5010623
18   swift-distributed-actorsPackageTests.xctest 0x00005605c61cd8fa <unavailable> + 5003514
19   swift-distributed-actorsPackageTests.xctest 0x00005605c61cd5cd <unavailable> + 5002701
20   swift-distributed-actorsPackageTests.xctest 0x00005605c61cdbc9 <unavailable> + 5004233
21   swift-distributed-actorsPackageTests.xctest 0x00005605c5e01ef4 <unavailable> + 1023732
22   swift-distributed-actorsPackageTests.xctest 0x00005605c61d3e78 <unavailable> + 5029496
23   swift-distributed-actorsPackageTests.xctest 0x00005605c602c5cc <unavailable> + 3294668
24   swift-distributed-actorsPackageTests.xctest 0x00005605c61c23f1 <unavailable> + 4957169
25   swift-distributed-actorsPackageTests.xctest 0x00005605c602c9cc <unavailable> + 3295692
26   swift-distributed-actorsPackageTests.xctest 0x00005605c61c1e71 <unavailable> + 4955761
27   swift-distributed-actorsPackageTests.xctest 0x00005605c62da327 <unavailable> + 6103847
28   swift-distributed-actorsPackageTests.xctest 0x00005605c62dafd8 <unavailable> + 6107096
29   swift-distributed-actorsPackageTests.xctest 0x00005605c62db089 <unavailable> + 6107273
30   libpthread.so.0                    0x00007f70279c96ba <unavailable> + 30394
31   libc.so.6                          0x00007f7025fd83b0 clone + 109
0x5605c5ddabc9, closure #1 (Swift.Int32) -> () in static Backtrace.Backtrace.install() -> () at /code/.build/checkouts/swift-backtrace/Sources/Backtrace/Backtrace.swift:53
0x5605c5ddabe8, @objc closure #1 (Swift.Int32) -> () in static Backtrace.Backtrace.install() -> () at /code/<compiler-generated>:0
0x7f70279d338f
0x7f7027f10485
0x7f7027d2e1d8
0x5605c639bb48, closure #1 (DistributedActors.ActorContext<Swift.String>, Swift.String) throws -> DistributedActors.Behavior<Swift.String> in DistributedActorsTests.ActorDeferTests.receiveDeferBehavior(_: DistributedActors.ActorRef<Swift.String>, deferUntil: DistributedActors.DeferUntilWhen, whenActor: DistributedActorsTests.ActorDeferTests.ReductionReaction) -> DistributedActors.Behavior<Swift.String> at /code/Tests/DistributedActorsTests/ActorDeferTests.swift:54
0x5605c639be48, partial apply forwarder for closure #1 (DistributedActors.ActorContext<Swift.String>, Swift.String) throws -> DistributedActors.Behavior<Swift.String> in DistributedActorsTests.ActorDeferTests.receiveDeferBehavior(_: DistributedActors.ActorRef<Swift.String>, deferUntil: DistributedActors.DeferUntilWhen, whenActor: DistributedActorsTests.ActorDeferTests.ReductionReaction) -> DistributedActors.Behavior<Swift.String> at /code/<compiler-generated>:0
0x5605c632d6bb, reabstraction thunk helper from @escaping @callee_guaranteed (@guaranteed DistributedActors.ActorContext<Swift.String>, @guaranteed Swift.String) -> (@owned DistributedActors.Behavior<Swift.String>, @error @owned Swift.Error) to @escaping @callee_guaranteed (@guaranteed DistributedActors.ActorContext<Swift.String>, @in_guaranteed Swift.String) -> (@owned DistributedActors.Behavior<Swift.String>, @error @owned Swift.Error) at /code/<compiler-generated>:0
0x5605c639c2f3, partial apply forwarder for reabstraction thunk helper from @escaping @callee_guaranteed (@guaranteed DistributedActors.ActorContext<Swift.String>, @guaranteed Swift.String) -> (@owned DistributedActors.Behavior<Swift.String>, @error @owned Swift.Error) to @escaping @callee_guaranteed (@guaranteed DistributedActors.ActorContext<Swift.String>, @in_guaranteed Swift.String) -> (@owned DistributedActors.Behavior<Swift.String>, @error @owned Swift.Error) at /code/<compiler-generated>:0
0x5605c603270d, DistributedActors.Behavior.interpretMessage(context: DistributedActors.ActorContext<A>, message: A, file: Swift.StaticString, line: Swift.UInt) throws -> DistributedActors.Behavior<A> at /code/Sources/DistributedActors/Behaviors.swift:499
0x5605c62c70a4, DistributedActors.Supervisor.interpretSupervised0(target: DistributedActors.Behavior<A>, context: DistributedActors.ActorContext<A>, processingAction: DistributedActors.ProcessingAction<A>, nFoldFailureDepth: Swift.Int) throws -> DistributedActors.Behavior<A> at /code/Sources/DistributedActors/Supervision.swift:434
0x5605c62c5c10, DistributedActors.Supervisor.interpretSupervised0(target: DistributedActors.Behavior<A>, context: DistributedActors.ActorContext<A>, processingAction: DistributedActors.ProcessingAction<A>) throws -> DistributedActors.Behavior<A> at /code/Sources/DistributedActors/Supervision.swift:423
0x5605c62c5860, DistributedActors.Supervisor.interpretSupervised(target: DistributedActors.Behavior<A>, context: DistributedActors.ActorContext<A>, message: A) throws -> DistributedActors.Behavior<A> at /code/Sources/DistributedActors/Supervision.swift:393
0x5605c5ffaf07, DistributedActors.ActorShell.interpretMessage(message: A) throws -> __C.SActActorRunResult at /code/Sources/DistributedActors/ActorShell.swift:260
0x5605c61cf0fc, closure #4 (Swift.UnsafeMutableRawPointer, Swift.UnsafeMutableRawPointer, __C.SActMailboxRunPhase) throws -> __C.SActActorRunResult in DistributedActors.Mailbox.init(shell: DistributedActors.ActorShell<A>, capacity: Swift.UInt32, maxRunLength: Swift.UInt32) -> DistributedActors.Mailbox<A> at /code/Sources/DistributedActors/Mailbox.swift:205
0x5605c61cf4be, partial apply forwarder for closure #4 (Swift.UnsafeMutableRawPointer, Swift.UnsafeMutableRawPointer, __C.SActMailboxRunPhase) throws -> __C.SActActorRunResult in DistributedActors.Mailbox.init(shell: DistributedActors.ActorShell<A>, capacity: Swift.UInt32, maxRunLength: Swift.UInt32) -> DistributedActors.Mailbox<A> at /code/<compiler-generated>:0
0x5605c61cd8f9, DistributedActors.(InterpretMessageClosureContext in _F5A1B51A24FD9930199EBF91BB3C2562).exec(cellPtr: Swift.UnsafeMutableRawPointer, messagePtr: Swift.UnsafeMutableRawPointer, runPhase: __C.SActMailboxRunPhase) throws -> __C.SActActorRunResult at /code/Sources/DistributedActors/Mailbox.swift:638
0x5605c61cd5cc, closure #1 (Swift.Optional<Swift.UnsafeMutableRawPointer>, Swift.Optional<Swift.UnsafeMutableRawPointer>, Swift.Optional<Swift.UnsafeMutableRawPointer>, __C.SActMailboxRunPhase) -> __C.SActActorRunResult in DistributedActors.Mailbox.init(shell: DistributedActors.ActorShell<A>, capacity: Swift.UInt32, maxRunLength: Swift.UInt32) -> DistributedActors.Mailbox<A> at /code/Sources/DistributedActors/Mailbox.swift:139
0x5605c61cdbc8, @objc closure #1 (Swift.Optional<Swift.UnsafeMutableRawPointer>, Swift.Optional<Swift.UnsafeMutableRawPointer>, Swift.Optional<Swift.UnsafeMutableRawPointer>, __C.SActMailboxRunPhase) -> __C.SActActorRunResult in DistributedActors.Mailbox.init(shell: DistributedActors.ActorShell<A>, capacity: Swift.UInt32, maxRunLength: Swift.UInt32) -> DistributedActors.Mailbox<A> at /code/<compiler-generated>:0
0x5605c5e01ef3, cmailbox_run at Sources/CDistributedActorsMailbox/c_mailbox.c:380
0x5605c61d3e77, DistributedActors.Mailbox.run() -> () at /code/Sources/DistributedActors/Mailbox.swift:476
0x5605c602c5cb, reabstraction thunk helper from @escaping @callee_guaranteed () -> () to @escaping @callee_guaranteed () -> (@out ()) at /code/<compiler-generated>:0
0x5605c61c23f0, partial apply forwarder for reabstraction thunk helper from @escaping @callee_guaranteed () -> () to @escaping @callee_guaranteed () -> (@out ()) at /code/<compiler-generated>:0
0x5605c602c9cb, reabstraction thunk helper from @escaping @callee_guaranteed () -> (@out ()) to @escaping @callee_guaranteed () -> () at /code/<compiler-generated>:0
0x5605c61c1e70, closure #1 () -> () in DistributedActors.FixedThreadPool.init(Swift.Int) throws -> DistributedActors.FixedThreadPool at /code/Sources/DistributedActors/FixedThreadPool.swift:75
0x5605c62da326, closure #1 () -> () in DistributedActors.Thread.init(() -> ()) throws -> DistributedActors.Thread at /code/Sources/DistributedActors/Thread.swift:53
0x5605c62dafd7, closure #1 (Swift.Optional<Swift.UnsafeMutableRawPointer>) -> Swift.Optional<Swift.UnsafeMutableRawPointer> in static DistributedActors.Thread.runnerCallback.getter : (Swift.Optional<Swift.UnsafeMutableRawPointer>) -> Swift.Optional<Swift.UnsafeMutableRawPointer> at /code/Sources/DistributedActors/Thread.swift:132
0x5605c62db088, @objc closure #1 (Swift.Optional<Swift.UnsafeMutableRawPointer>) -> Swift.Optional<Swift.UnsafeMutableRawPointer> in static DistributedActors.Thread.runnerCallback.getter : (Swift.Optional<Swift.UnsafeMutableRawPointer>) -> Swift.Optional<Swift.UnsafeMutableRawPointer> at /code/<compiler-generated>:0
0x7f70279c96b9
0x7f7025fd841c
0xffffffffffffffff
Exited with signal code 4

[ktoso]

Merge after #51 please.

[ktoso]

The failure is expected -- it hijacked a fault-ing on purpose test.

[ktoso]

Rebasing...

[ktoso]

As we don't have fault tests anymore this should now pass 👍