Re: [swift-users] Swift 4.0 LLDBFrontend Crash

[Michael Gottesman via swift-users]

I just added a section to ./docs/DebuggingTheCompiler.rst on how to get enable 
logging from LLDB.

Can you enable the logging there and add file an SR?

Michael

> On Oct 7, 2017, at 11:27 AM, Edward Connell  wrote:
> 
> Hi Michael,
> No I am not evaluating an expression or anything. This all worked fine in 
> past builds.
> 
> I simply set a breakpoint in a function and after stopping while gathering 
> values for the debugger view, it crashes.
> 
> It doesn't crash in all functions, but it does crash when trying to stop in 
> many different functions.
> An example function signature where it crashes is (DataView is a concrete 
> struct):
> 
> public func setupForward(mode: EvaluationMode, inData: DataView, labels: 
> DataView?,
>outData: inout DataView, backData: 
> inout DataView?) throws { ... }
> 
> Before calling the function, all of the parameters have valid values that I 
> can examine. But as soon as I step into this function, LLDB crashes with that 
> message. It behaves the same way with other functions that have different 
> signatures.
> 
> I tried to create a very simple repro case using this signature, but it 
> didn't crash. My project is on GitHub and this can be easily reproduced. The 
> only pain is installing my project on your test machine.
> 
> Ubuntu 16.04
> Swift 4.0 release
> NVidia gpu
> Netlib https://github.com/ewconnell/Netlib/wiki#installation 
> 
> CLion IDE with Swift plugin
> 
> 1) do a debug build
> 2) set a breakpoint at CudaSoftmax.swift:44  or any line in the function
> 3) run
> 4) when it stops LLDBFrontend crashes
> 
> LLDBFrontend: 
> /home/buildnode/jenkins/workspace/oss-swift-4.0-package-linux-ubuntu-16_04/swift/lib/SILOptimizer/Mandatory/AccessEnforcementSelection.cpp:613:
>  (anonymous namespace)::SourceAccess (anonymous 
> namespace)::AccessEnforcementSelection::getSourceAccess(swift::SILValue): 
> Assertion `isa(address) || isa(address)' failed.
> Stack dump:
> 0.While running pass #10 SILModuleTransform ""Access Enforcement 
> Selection"".
> 
> 
> Using the LLDB CLI I am able to stop there. If I try "fr var -O" with 
> mode, inData, and labels, it prints their values no problem
> outData and backData gives me a segmentation violation
> The visible difference is the "inout"
> 
> Not sure what the problem is. It worked fine in the past.
> 
> If you can think of an experiment I can try to create a simple repro case, 
> please let me know.
> 
> Thanks, Ed
> 
> On Fri, Oct 6, 2017 at 4:34 PM, Michael Gottesman  > wrote:
> It looks like this is failing during guaranteed optimization. Are you running 
> an expression in the debugger and we are crashing there?
> 
> Michael
> 
>> On Oct 6, 2017, at 11:53 AM, Edward Connell via swift-users 
>> > wrote:
>> 
>> While trying to debug a Netlib function, LLDB is crashing
>> 
>> I'm not sure what this assert means.
>> 
>> LLDBFrontend: 
>> /home/buildnode/jenkins/workspace/oss-swift-4.0-package-linux-ubuntu-16_04/swift/lib/SILOptimizer/Mandatory/AccessEnforcementSelection.cpp:613:
>>  (anonymous namespace)::SourceAccess (anonymous 
>> namespace)::AccessEnforcementSelection::getSourceAccess(swift::SILValue): 
>> Assertion `isa(address) || isa(address)' failed.
>> Stack dump:
>> 0.   While running pass #10 SILModuleTransform ""Access Enforcement 
>> Selection"".
>> 
>> It fails every time and the same way in several functions, but not all 
>> functions.
>> I tried to create a simple repro with the same function signature, but I 
>> can't get the simple case to fail.
>> A debug build isn't doing whole-module-optimization, so that's not it
>> 
>> Ideas anyone?
>> 
>> Who owns the LLDBFrontend?
>> 
>> Thanks, Ed
>> ___
>> swift-users mailing list
>> swift-users@swift.org 
>> https://lists.swift.org/mailman/listinfo/swift-users 
>> 
> 
> 

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[swift-users] file input

[Madhava Paliyam via swift-users]

Hi, 

I created a new file on swift playgrounds with data in it, the file type was an 
empty file. How should I access the file through my playground?

Thanks.

Madhava
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Re: [swift-users] Package Manager: Link to a static library.

[Fred Appelman via swift-users]

If it is just the library that cannot be found you may try to pass the 
directory where the library can be found to xcode. E.g.:

swift build -Xlinker "-L/usr/local/lib"
Regards,
-- 
Fred 


From: Evtim Papushev via swift-users 
Reply: Evtim Papushev 
Date: 11 October 2017 at 12:00:24
To: swift-users@swift.org 
Subject:  [swift-users] Package Manager: Link to a static library.  

Hi everyone,

I’m trying to achieve something relatively simple:

I have a C wrapper around C++ code that is built with CMake. So, I have a set 
of static libraries (.a files) and one header file.

I’m trying to create a Swift Package that contains those files, so I can 
include them in a project.

I made a module.modulemap:
module FinBar {
    header "fin_bar.h"
    link finbar
    export *
}

swift build fails as it cannot find the library to link it.

Any suggestions?

Thanks,
Evtim
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Re: [swift-users] Why does the withUnsafeMutableBufferPointer closure take an inout parameter?

[Guillaume Lessard via swift-users]

It’s not a bug-fix and it is an API change, so it seems it would have to go 
through evolution.

Guillaume Lessard

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