repro-segfault-nix-osx-IOKit

build-native.sh

#!/bin/bash
set -e
echo ================ build
"/nix/store/71lbsnxpbnqkhndcxg1fcwxvjxmviqlg-clang-7.1.0/bin/clang-7" \
  -cc1 \
  -triple x86_64-apple-macosx10.12.0 \
  -Wdeprecated-objc-isa-usage \
  -Werror=deprecated-objc-isa-usage \
  -emit-obj \
  -disable-free \
  -disable-llvm-verifier \
  -discard-value-names \
  -main-file-name test.c \
  -mrelocation-model pic \
  -pic-level 2 \
  -mthread-model posix \
  -mdisable-fp-elim \
  -masm-verbose \
  -munwind-tables \
  -faligned-alloc-unavailable \
  -target-cpu penryn \
  -dwarf-column-info \
  -debug-info-kind=standalone \
  -dwarf-version=4 \
  -debugger-tuning=lldb \
  -target-linker-version 274.2 \
  -nostdsysteminc \
  -resource-dir /nix/store/h7nk6lxk93y23rlnm7z97ss93y893qs5-clang-wrapper-7.1.0/resource-root \
  -idirafter /nix/store/kjzhj2m110xg8by1q1iajsihj2q9lmfs-Libsystem-osx-10.12.6/include \
  -isystem /nix/store/4a3mw3kg40zafd54f84h53chb0m5wlsy-libc++-7.1.0/include \
  -isystem /nix/store/xq93z05cjp3224ff2swi3jhl8z3m45r3-libc++abi-7.1.0/include \
  -isystem /nix/store/ipgnljj7gvwm0pd8mdfhdrcrhisjbxkv-compiler-rt-7.1.0-dev/include \
  -iframework /nix/store/adrcq37kv1j0s4dskaxzh6xj52j5qg1y-IOKit-osx-10.11.6/Library/Frameworks \
  -iframework /nix/store/m45lr9xhns0g65f79n55xrwsqbrrxjfy-swift-corefoundation/Library/Frameworks \
  -isystem /nix/store/4a3mw3kg40zafd54f84h53chb0m5wlsy-libc++-7.1.0/include \
  -isystem /nix/store/xq93z05cjp3224ff2swi3jhl8z3m45r3-libc++abi-7.1.0/include \
  -isystem /nix/store/ipgnljj7gvwm0pd8mdfhdrcrhisjbxkv-compiler-rt-7.1.0-dev/include \
  -iframework /nix/store/adrcq37kv1j0s4dskaxzh6xj52j5qg1y-IOKit-osx-10.11.6/Library/Frameworks \
  -iframework /nix/store/m45lr9xhns0g65f79n55xrwsqbrrxjfy-swift-corefoundation/Library/Frameworks \
  -D _FORTIFY_SOURCE=2 \
  -O2 \
  -Wformat \
  -Wformat-security \
  -Werror=format-security \
  -Wall \
  -fdebug-compilation-dir /Users/gosha/Documents/git/private-nixpkgs/bashtop \
  -ferror-limit 19 \
  -fmessage-length 303 \
  -fwrapv \
  -stack-protector 2 \
  -stack-protector-buffer-size 4 \
  -fblocks \
  -fencode-extended-block-signature \
  -fregister-global-dtors-with-atexit \
  -fobjc-runtime=macosx-10.12.0 \
  -fmax-type-align=16 \
  -fdiagnostics-show-option \
  -fcolor-diagnostics \
  -vectorize-loops \
  -vectorize-slp \
  -o test.o \
  -x c test.c

# export NIX_COREFOUNDATION_RPATH="/nix/store/m45lr9xhns0g65f79n55xrwsqbrrxjfy-swift-corefoundation/Library/Frameworks"
# This makes it segfault! ⤴
export NIX_COREFOUNDATION_RPATH=

echo ================ link
"/nix/store/h7nk6lxk93y23rlnm7z97ss93y893qs5-clang-wrapper-7.1.0/bin/ld" \
  -demangle \
  -whyload \
  -whatsloaded \
  -order_file_statistics \
  -lto_library /nix/store/71lbsnxpbnqkhndcxg1fcwxvjxmviqlg-clang-7.1.0/lib/libLTO.dylib \
  -dynamic \
  -arch x86_64 \
  -macosx_version_min 10.12.0 \
  -o test \
  -L/nix/store/4a3mw3kg40zafd54f84h53chb0m5wlsy-libc++-7.1.0/lib \
  -L/nix/store/xq93z05cjp3224ff2swi3jhl8z3m45r3-libc++abi-7.1.0/lib \
  -L/nix/store/3mp7dzda0aqcfw6p3kkbbd3dq9xi0zyp-compiler-rt-7.1.0/lib \
  -L/nix/store/4a3mw3kg40zafd54f84h53chb0m5wlsy-libc++-7.1.0/lib \
  -L/nix/store/xq93z05cjp3224ff2swi3jhl8z3m45r3-libc++abi-7.1.0/lib \
  -L/nix/store/3mp7dzda0aqcfw6p3kkbbd3dq9xi0zyp-compiler-rt-7.1.0/lib \
  -L/nix/store/kjzhj2m110xg8by1q1iajsihj2q9lmfs-Libsystem-osx-10.12.6/lib \
  -L/nix/store/yhl75s64pcrjq6d7j4sk572xh07jf9il-clang-7.1.0-lib/lib \
  -L/nix/store/4a3mw3kg40zafd54f84h53chb0m5wlsy-libc++-7.1.0/lib \
  -macosx_version_min 10.12 \
  -sdk_version 10.12 \
  -no_uuid test.o \
  -framework IOKit \
  -framework CoreFoundation \
  -lSystem /nix/store/h7nk6lxk93y23rlnm7z97ss93y893qs5-clang-wrapper-7.1.0/resource-root/lib/darwin/libclang_rt.osx.a \
  -F/nix/store/adrcq37kv1j0s4dskaxzh6xj52j5qg1y-IOKit-osx-10.11.6/Library/Frameworks \
  -F/nix/store/m45lr9xhns0g65f79n55xrwsqbrrxjfy-swift-corefoundation/Library/Frameworks \
  -F/nix/store/adrcq37kv1j0s4dskaxzh6xj52j5qg1y-IOKit-osx-10.11.6/Library/Frameworks \
  -F/nix/store/m45lr9xhns0g65f79n55xrwsqbrrxjfy-swift-corefoundation/Library/Frameworks

echo ================ dsym
"/nix/store/xwwgqz0v1h7pfvj0a12sw5yqp2418gdv-cctools-binutils-darwin-927.0.2/bin/dsymutil" \
  -o test.dSYM test

test-clang.nix

{ pkgs ? import (fetchTarball {
  url =
    "https://github.com/NixOS/nixpkgs-channels/archive/2cd2e7267e5b9a960c2997756cb30e86f0958a6b.tar.gz";
  sha256 = "0ir3rk776wldyjz6l6y5c5fs8lqk95gsik6w45wxgk6zdpsvhrn5";
}) { }, stdenv ? pkgs.stdenv }:
stdenv.mkDerivation {
  name = "test";
  buildInputs = [ pkgs.darwin.IOKit ];
}

test.c

#include <stdbool.h>
#include <stdlib.h>
#include <stdio.h>
#include <CoreFoundation/CoreFoundation.h>
#include <IOKit/IOKitLib.h>
#include <IOKit/storage/IOBlockStorageDriver.h>
#include <IOKit/storage/IOMedia.h>
#include <IOKit/IOBSD.h>

int main()
{
    CFDictionaryRef parent_dict;
    CFDictionaryRef props_dict;
    CFDictionaryRef stats_dict;
    io_registry_entry_t parent;
    io_registry_entry_t disk;
    io_iterator_t disk_list;

    printf("Start\n");

    // Get list of disks
    if (IOServiceGetMatchingServices(kIOMasterPortDefault,
                                     IOServiceMatching(kIOMediaClass),
                                     &disk_list) != kIOReturnSuccess)
    {
        printf("unable to get the list of disks.\n");
        goto error;
    }

    // Iterate over disks
    while ((disk = IOIteratorNext(disk_list)) != 0)
    {
        parent_dict = NULL;
        props_dict = NULL;
        stats_dict = NULL;

        if (IORegistryEntryGetParentEntry(disk, kIOServicePlane, &parent) != kIOReturnSuccess)
        {
            printf("unable to get the disk's parent.\n");
            IOObjectRelease(disk);
            goto error;
        }

        if (IOObjectConformsTo(parent, "IOBlockStorageDriver"))
        {
            printf("Found IOBlockStorageDriver\n");

            if (IORegistryEntryCreateCFProperties(
                    disk,
                    (CFMutableDictionaryRef *)&parent_dict,
                    kCFAllocatorDefault,
                    kNilOptions) != kIOReturnSuccess)
            {
                printf("unable to get the parent's properties.\n");
                IOObjectRelease(disk);
                IOObjectRelease(parent);
                goto error;
            }
            if (IORegistryEntryCreateCFProperties(
                    parent,
                    (CFMutableDictionaryRef *)&props_dict,
                    kCFAllocatorDefault,
                    kNilOptions) != kIOReturnSuccess)
            {
                printf("unable to get the disk properties\n");
                CFRelease(props_dict);
                IOObjectRelease(disk);
                IOObjectRelease(parent);
                goto error;
            }

            const int kMaxDiskNameSize = 64;
            CFStringRef disk_name_ref = (CFStringRef)CFDictionaryGetValue(parent_dict, CFSTR(kIOBSDNameKey));
            char disk_name[kMaxDiskNameSize];

            CFStringGetCString(disk_name_ref,
                               disk_name,
                               kMaxDiskNameSize,
                               CFStringGetSystemEncoding());

            stats_dict = (CFDictionaryRef)CFDictionaryGetValue(props_dict, CFSTR(kIOBlockStorageDriverStatisticsKey));

            if (stats_dict == NULL)
            {
                printf("Unable to get disk stats.");
                goto error;
            }

            CFNumberRef number;
            int64_t reads = 0;
            // int64_t writes = 0;
            // int64_t read_bytes = 0;
            // int64_t write_bytes = 0;
            // int64_t read_time = 0;
            // int64_t write_time = 0;

            // Get disk reads/writes

            if ((number = (CFNumberRef)CFDictionaryGetValue(
                     stats_dict,
                     // "It has an OSNumber value"
                     CFSTR(kIOBlockStorageDriverStatisticsReadsKey))))
            {
                printf("kIOBlockStorageDriverStatisticsReadsKey: %s\n", kIOBlockStorageDriverStatisticsReadsKey);
                printf("                                 number: %p\n", number);
                CFNumberGetValue(number, kCFNumberSInt64Type, &reads);
                printf("Never gets here because of segfault\n");
            }
        }
    }
    return 0;
error:
    return 1;
}

test.sh

#!/bin/bash
nix-shell test-clang.nix --run "bash build-native.sh && ./test"