Get error: "failed to get reply to handshake packet" when running app in lldb
Hi @Adrian_Prantl , sorry to bother you, I built the lldb using tag swift-5.6.1-RELEASE, but when I launch lldb I built, and using process launch to run the app, I get the error says "failed to get...
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Nil variables inside @synchronized block in release mode
Hey everyone, I was debugging an objc code today from a binary objc framework that was built in release mode and noticed that lldb was giving a nil for variables inside the method that has an...
View ArticleXctoolchain compiled by build-script, cannot be debug
I compiled the xctoolchain by using build-script, then import the xctoolchain into Xcode. When I used it to debug the app, the launch storyboard is always stuck，and Xcode console has no message...
View ArticleXcode 14.1 debugger: "error: Couldn't realize type of self"
I recently added Swift to my existing objective-c static library project and encountering issues when debugging Swift code. When code stops at a breakpoint and I enter a po command, such as: po title,...
View ArticlePartition the reflection metadata to Runtime and Debug categories
During the review of the Opt-In Reflection Metadata proposal, @Adrian_Prantl raised a concern regarding the preservation of debugging capabilities while implementing the support of Opt-in reflection...
View Article[SOLVED] LLDB failed when I connected my c++ lib
I connected C++ library to my executable SPM project and set -enable-experimental-cxx-interop to swift settings, and when I try to debug with LLDB, I received the next error messages (lldb) po self...
View ArticleDebugging SIL in LLDB
Has anyone ever tried debugging SIL code in LLDB as mentioned here? If yes, is there a way I can print a SIL value such as, %1 in LLDB? 2 posts - 2 participants Read full topic
View ArticleVersion of LLVM used by Swift
Hi, How do I tell which branch of llvm-project is used to build the Swift compiler? In particular which branch is being used to build the Swift 5.9 release. 22 posts - 5 participants Read full topic
View ArticleBuilding LLDB
The instructions to build LLDB don't seem to work. I have built a full macOS toolchain and would now like to just build LLDB. The README in the lldb folder says I can build it using...
View ArticleLldb-rpc-server crashes when running SwiftUI applications
Hello! I'm on a fresh install of Ventura 13.6 with Xcode 14.3.1. If I create a new macOS SwiftUI application and run it, the application itself starts and runs without problems. However...
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LLDB: Print valued returned by a function
LLDB supports printing the return value of a function. Here's an example in Xcode, on a simple C project: It appears that this behaviour isn't available in Swift. I wasn't able to find any related...
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Xcode 15: po self error when i debug a framework!
I have a framework and .dsym file, and I have a source code in my computer. when i hit a breakpoint, i run po self, it shows error below(other commands such as v self, i works well): po self error:...
View ArticleLLDB support for Swift async frames for Windows x86_64
Hi, LLDB currently has special extended frame support for Swift async frames for x86_64 and arm64. Unfortunately, it doesn't work correctly with windows x86_64 frame layout, as it makes an assumption...
View Article[Pitch] Include lldb-dap in Swift toolchain
I would like to propose that lldb-dap (The LLDB debug adapter from the llvm-project) be included in the Swift toolchain. It is currently included in the Swift Windows toolchain but not in the Linux...
View ArticleSymbolFileDWARF::FindTypes is called too many times (apparently)
I was debugging slow expression evaluation in lldb in my project and noticed that most of the time is spent on calling the functions SymbolFileDWARF::FindTypes and SymbolFileDWARF::FindFunctions. And...
View ArticleLocation-based error breakpoints (feature request)
I've found the break-on-Swift-error to be almost useless at this point, because so many libraries routinely throw errors. You have to place a breakpoint, enable the error breakpoint, then resume. I...
View ArticleLldb: Unable to bind generic parameters in context with weakly captured self
Hello, I have opened an issue regarding LLDB, see lldb: Unable to bind generic parameters in context with weakly captured self · Issue #9194 · swiftlang/llvm-project · GitHub . TL;DR: If you capture...
View ArticleTrouble building lib/liblldb.so.17.0.0 on 6.0.1 using manually built 5.10.1
I hope this is the correct category to post. I have successfully (I think?) built the 5.10.1 based on these instructions here: Building the Swift Project on Linux with lld instead of gold - #24 by...
View ArticleLLDB-RPC-Server Playgrounds Crash
For some reason the following crashes on Xcode 16.1 RC Playgrounds Platforms iOS, Swift 6. No issues on Swift 5 import Cocoa protocol VirtualPaksProtocol { associatedtype Base var base: Base { get } }...
View ArticleLLDB Negative Cache
In Xcode, the LLDB variables view always beachballs for a bit when debugging a Swift file with type aliases referencing other typealiases. Here’s the relevant source code: open class...
View ArticleOdd, persistent LLDB message about class methods
I regularly get this error when evaluating expressions in LLDB: error: <EXPR>:4:20: class methods are only allowed within classes; use 'static' to declare a static method final class func...
View ArticleSwift LLDB and Diff Patch Model Context Protocol Server
Hi Swift community, I've gotten quite used to needing AI-enabled code editors like Cursor and Windsurf. But I've noticed that often the LLM while debugging has to write a lot of print statements...
View ArticleLLDB Stuck in llvm::vfs:: Loop
We’re experiencing an issue where LLDB freezes when debugging certain AST contexts. The sampled stack trace suggests that LLDB is stuck in an infinite loop with the following calls involved:...
View ArticleLLDB Slow Breakpoints Despite Disabling Swift C++ Interop
We’re running into a performance issue with LLDB when hitting a breakpoint in a specific file. The function(in lldb-rpc-server sample) takes around ~10 seconds when a breakpoint is triggered...
View ArticleLLDB prints wrong UUID value
LLDB prints the wrong UUID value when unwrapping it as an associated value within a switch‑case statement. let's consider following example: enum MyEnum { case firstCase(UUID) } let myEnum =...
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