Skifary

#import <Foundation/Foundation.h>

#import "ffi.h"

NSMutableArray *g_allocations;
ffi_cif g_cif;
ffi_closure *g_closure;
void *g_replacement_invoke;
void *g_origin_invoke;

Skifary

#import <Foundation/Foundation.h>

typedef struct __block_impl {
    void *isa;
    int Flags;
    int Reserved;
    void *FuncPtr;
}__block_impl;

typedef void(^GlobalBlock)(void);

nzatsepilov

START_DATE=$(date +"%s")

SWIFT_LINT=/usr/local/bin/swiftlint

# Run SwiftLint for given filename
run_swiftlint() {
    local filename="${1}"
    if [[ "${filename##*.}" == "swift" ]]; then
    ${SWIFT_LINT} lint --path "${filename}"
    fi

steipete

# The trick is to link the DeviceSupport folder from the beta to the stable version.
# sudo needed if you run the Mac App Store version. Always download the dmg instead... you'll thank me later :)

# Support iOS 15 devices (Xcode 13.0) with Xcode 12.5:
sudo ln -s /Applications/Xcode-beta.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport/15.0 /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/DeviceSupport

# Then restart Xcode and reconnect your devices. You will need to do that for every beta of future iOS versions

# (A similar approach works for older versions too, just change the version number after DeviceSupport)

tkersey

Quick access

• The Dao of Functional Programming

2026

June

• Apple Internals: Swift in the Kernel

  After WWDC, I saw Devon Maloney posted a slide saying Apple has “started writing parts of the core operating system kernel in Swift” for the 27 releases. First steps toward a memory-safe kernel. What does this even mean?!

> Naturally I dropped what I was doing and went grepping through the iOS 27 kernelcache. Alas, nothing came of it. All is not lost though: I found the Embedded Swift runtime in macOS 27, sitting in com.apple.kec.pthread of all places. Then I went poking around the root filesystem and it turns out Apple gave the whole effort a name: KernelKit.

steipete

PSPDF_EXTERN BOOL PSPDFIsBlock(id _Nullable block) {
    static Class blockClass;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        blockClass = [^{} class];
        while ([blockClass superclass] != NSObject.class) {
            blockClass = [blockClass superclass];
        }
    });