Merge pull request #3518 from laytan/sysinfo-arm-additions

sys/info: add arm feature detection, fix Linux implementation, show more CPU info on Darwin

core/sys/darwin/xnu_system_call_wrappers.odin

@@ -337,7 +337,7 @@ syscall_ftruncate :: #force_inline proc "contextless" (fd: c.int, length: off_t)
 	return cast(c.int)intrinsics.syscall(unix_offset_syscall(.ftruncate), uintptr(fd), uintptr(length))
 }
 
-syscall_sysctl :: #force_inline proc "contextless" (name: ^c.int, namelen: c.uint, oldp: rawptr, oldlenp: ^i64, newp: ^i8, newlen: i64) -> c.int {
+syscall_sysctl :: #force_inline proc "contextless" (name: [^]c.int, namelen: c.size_t, oldp: rawptr, oldlenp: ^c.size_t, newp: rawptr, newlen: c.size_t) -> c.int {
 	return cast(c.int)intrinsics.syscall(unix_offset_syscall(.sysctl), uintptr(name), uintptr(namelen), uintptr(oldp), uintptr(oldlenp), uintptr(newp), uintptr(newlen))
 }
 
@@ -390,8 +390,8 @@ syscall_adjtime :: #force_inline proc "contextless" (delta: ^timeval, old_delta:
 	return cast(c.int)intrinsics.syscall(unix_offset_syscall(.adjtime), uintptr(delta), uintptr(old_delta))
 }
 
-syscall_sysctlbyname :: #force_inline proc "contextless" (name: cstring, oldp: rawptr, oldlenp: ^i64, newp: rawptr, newlen: i64) -> c.int {
-	return cast(c.int)intrinsics.syscall(unix_offset_syscall(.sysctlbyname), transmute(uintptr)name, uintptr(oldp), uintptr(oldlenp), uintptr(newp), uintptr(newlen))
+syscall_sysctlbyname :: #force_inline proc "contextless" (name: string, oldp: rawptr, oldlenp: ^c.size_t, newp: rawptr, newlen: c.size_t) -> c.int {
+	return cast(c.int)intrinsics.syscall(unix_offset_syscall(.sysctlbyname), uintptr(raw_data(name)), uintptr(len(name)), uintptr(oldp), uintptr(oldlenp), uintptr(newp), uintptr(newlen))
 }
 
 syscall_proc_info :: #force_inline proc "contextless" (num: c.int, pid: u32, flavor: c.int, arg: u64, buffer: rawptr, buffer_size: c.int) -> c.int {

core/sys/info/cpu_arm.odin

@@ -1,26 +1,70 @@
 //+build arm32, arm64
 package sysinfo
 
-// TODO: Set up an enum with the ARM equivalent of the above.
-CPU_Feature :: enum u64 {}
+import "core:sys/unix"
 
-cpu_features: Maybe(CPU_Feature)
-cpu_name:     Maybe(string)
+_ :: unix
 
-@(init, private)
-init_cpu_features :: proc "c" () {
+CPU_Feature :: enum u64 {
+	// Advanced SIMD & floating-point capabilities:
+	asimd,         // General support for Advanced SIMD instructions/neon.
+	floatingpoint, // General support for floating-point instructions.
+	asimdhp,       // Advanced SIMD half-precision conversion instructions.
+	bf16,          // Storage and arithmetic instructions of the Brain Floating Point (BFloat16) data type.
+	fcma,          // Floating-point complex number instructions.
+	fhm,           // Floating-point half-precision multiplication instructions.
+	fp16,          // General half-precision floating-point data processing instructions.
+	frint,         // Floating-point to integral valued floating-point number rounding instructions.
+	i8mm,          // Advanced SIMD int8 matrix multiplication instructions.
+	jscvt,         // JavaScript conversion instruction.
+	rdm,           // Advanced SIMD rounding double multiply accumulate instructions.
+
+	flagm,  // Condition flag manipulation instructions.
+	flagm2, // Enhancements to condition flag manipulation instructions.
+	crc32,  // CRC32 instructions.
+
+	lse,    // Atomic instructions to support large systems.
+	lse2,   // Changes to single-copy atomicity and alignment requirements for loads and stores for large systems.
+	lrcpc,  // Load-acquire Release Consistency processor consistent (RCpc) instructions.
+	lrcpc2, // Load-acquire Release Consistency processor consistent (RCpc) instructions version 2.
+
+	aes,
+	pmull,
+	sha1,
+	sha256,
+	sha512,
+	sha3,
+
+	sb,   // Barrier instruction to control speculation.
+	ssbs, // Instructions to control speculation of loads and stores.
 }
 
+CPU_Features :: distinct bit_set[CPU_Feature; u64]
+
+cpu_features: Maybe(CPU_Features)
+cpu_name: Maybe(string)
+
 @(private)
-_cpu_name_buf: [72]u8
+cpu_name_buf: [128]byte
 
 @(init, private)
-init_cpu_name :: proc "c" () {
-	when ODIN_ARCH == .arm32 {
-		copy(_cpu_name_buf[:], "ARM")
-		cpu_name = string(_cpu_name_buf[:3])
-	} else {
-		copy(_cpu_name_buf[:], "ARM64")
-		cpu_name = string(_cpu_name_buf[:5])
+init_cpu_name :: proc "contextless" () {
+	generic := true
+
+	when ODIN_OS == .Darwin {
+		if unix.sysctlbyname("machdep.cpu.brand_string", &cpu_name_buf) {
+			cpu_name = string(cstring(rawptr(&cpu_name_buf)))
+			generic = false
+		}
 	}
-}
+
+	if generic {
+		when ODIN_ARCH == .arm64 {
+			copy(cpu_name_buf[:], "ARM64")
+			cpu_name = string(cpu_name_buf[:len("ARM64")])
+		} else {
+			copy(cpu_name_buf[:], "ARM")
+			cpu_name = string(cpu_name_buf[:len("ARM")])
+		}
+	}
+}

core/sys/info/cpu_darwin_arm64.odin

@@ -0,0 +1,98 @@
+package sysinfo
+
+import "core:sys/unix"
+
+@(init, private)
+init_cpu_features :: proc "contextless" () {
+	@(static) features: CPU_Features
+	defer cpu_features = features
+
+	try_set :: proc "contextless" (name: string, feature: CPU_Feature) -> (ok: bool) {
+		support: b32
+		if ok = unix.sysctlbyname(name, &support); ok && support {
+			features += { feature }
+		}
+		return
+	}
+
+	// Docs from Apple: https://developer.apple.com/documentation/kernel/1387446-sysctlbyname/determining_instruction_set_characteristics
+	// Features from there that do not have (or I didn't find) an equivalent on Linux are commented out below.
+
+	// Advanced SIMD & floating-point capabilities:
+	{
+		if !try_set("hw.optional.AdvSIMD", .asimd) {
+			try_set("hw.optional.neon", .asimd)
+		}
+
+		try_set("hw.optional.floatingpoint", .floatingpoint)
+
+		if !try_set("hw.optional.AdvSIMD_HPFPCvt", .asimdhp) {
+			try_set("hw.optional.neon_hpfp", .asimdhp)
+		}
+
+		try_set("hw.optional.arm.FEAT_BF16", .bf16)
+		// try_set("hw.optional.arm.FEAT_DotProd", .dotprod)
+
+		if !try_set("hw.optional.arm.FEAT_FCMA", .fcma) {
+			try_set("hw.optional.armv8_3_compnum", .fcma)
+		}
+
+		if !try_set("hw.optional.arm.FEAT_FHM", .fhm) {
+			try_set("hw.optional.armv8_2_fhm", .fhm)
+		}
+
+		if !try_set("hw.optional.arm.FEAT_FP16", .fp16) {
+			try_set("hw.optional.neon_fp16", .fp16)
+		}
+
+		try_set("hw.optional.arm.FEAT_FRINTTS", .frint)
+		try_set("hw.optional.arm.FEAT_I8MM", .i8mm)
+		try_set("hw.optional.arm.FEAT_JSCVT", .jscvt)
+		try_set("hw.optional.arm.FEAT_RDM", .rdm)
+	}
+
+	// Integer capabilities:
+	{
+		try_set("hw.optional.arm.FEAT_FlagM", .flagm)
+		try_set("hw.optional.arm.FEAT_FlagM2", .flagm2)
+		try_set("hw.optional.armv8_crc32", .crc32)
+	}
+
+	// Atomic and memory ordering instruction capabilities:
+	{
+		try_set("hw.optional.arm.FEAT_LRCPC", .lrcpc)
+		try_set("hw.optional.arm.FEAT_LRCPC2", .lrcpc2)
+
+		if !try_set("hw.optional.arm.FEAT_LSE", .lse) {
+			try_set("hw.optional.armv8_1_atomics", .lse)
+		}
+
+		// try_set("hw.optional.arm.FEAT_LSE2", .lse2)
+	}
+
+	// Encryption capabilities:
+	{
+		try_set("hw.optional.arm.FEAT_AES", .aes)
+		try_set("hw.optional.arm.FEAT_PMULL", .pmull)
+		try_set("hw.optional.arm.FEAT_SHA1", .sha1)
+		try_set("hw.optional.arm.FEAT_SHA256", .sha256)
+
+		if !try_set("hw.optional.arm.FEAT_SHA512", .sha512) {
+			try_set("hw.optional.armv8_2_sha512", .sha512)
+		}
+
+		if !try_set("hw.optional.arm.FEAT_SHA3", .sha3) {
+			try_set("hw.optional.armv8_2_sha3", .sha3)
+		}
+	}
+
+	// General capabilities:
+	{
+		// try_set("hw.optional.arm.FEAT_BTI", .bti)
+		// try_set("hw.optional.arm.FEAT_DPB", .dpb)
+		// try_set("hw.optional.arm.FEAT_DPB2", .dpb2)
+		// try_set("hw.optional.arm.FEAT_ECV", .ecv)
+		try_set("hw.optional.arm.FEAT_SB", .sb)
+		try_set("hw.optional.arm.FEAT_SSBS", .ssbs)
+	}
+}

core/sys/info/cpu_linux_arm.odin

@@ -0,0 +1,65 @@
+//+build arm32, arm64
+//+build linux
+package sysinfo
+
+import "core:sys/linux"
+import "core:strings"
+
+@(init, private)
+init_cpu_features :: proc() {
+	fd, err := linux.open("/proc/cpuinfo", {})
+	if err != .NONE { return }
+	defer linux.close(fd)
+
+	// This is probably enough right?
+	buf: [4096]byte
+	n, rerr := linux.read(fd, buf[:])
+	if rerr != .NONE || n == 0 { return }
+
+	features: CPU_Features
+	defer cpu_features = features
+
+	str := string(buf[:n])
+	for line in strings.split_lines_iterator(&str) {
+		key, _, value := strings.partition(line, ":")
+		key   = strings.trim_space(key)
+		value = strings.trim_space(value)
+
+		if key != "Features" { continue }
+
+		for feature in strings.split_by_byte_iterator(&value, ' ') {
+			switch feature {
+			case "asimd", "neon": features += { .asimd }
+			case "fp":            features += { .floatingpoint }
+			case "asimdhp":       features += { .asimdhp }
+			case "asimdbf16":     features += { .bf16 }
+			case "fcma":          features += { .fcma }
+			case "asimdfhm":      features += { .fhm }
+			case "fphp", "half":  features += { .fp16 }
+			case "frint":         features += { .frint }
+			case "i8mm":          features += { .i8mm }
+			case "jscvt":         features += { .jscvt }
+			case "asimdrdm":      features += { .rdm }
+
+			case "flagm":  features += { .flagm }
+			case "flagm2": features += { .flagm2 }
+			case "crc32":  features += { .crc32 }
+
+			case "atomics": features += { .lse }
+			case "lrcpc":   features += { .lrcpc }
+			case "ilrcpc":  features += { .lrcpc2 }
+
+			case "aes":    features += { .aes }
+			case "pmull":  features += { .pmull }
+			case "sha1":   features += { .sha1 }
+			case "sha2":   features += { .sha256 }
+			case "sha3":   features += { .sha3 }
+			case "sha512": features += { .sha512 }
+
+			case "sb":   features += { .sb }
+			case "ssbs": features += { .ssbs }
+			}
+		}
+		break
+	}
+}

core/sys/info/doc.odin

@@ -19,18 +19,21 @@ Example:
 	import si "core:sys/info"
 
 	main :: proc() {
-		fmt.printf("Odin:  %v\n",     ODIN_VERSION)
-		fmt.printf("OS:    %v\n",     si.os_version.as_string)
-		fmt.printf("OS:    %#v\n",    si.os_version)
-		fmt.printf("CPU:   %v\n",     si.cpu_name)
-		fmt.printf("RAM:   %v MiB\n", si.ram.total_ram / 1024 / 1024)
+		fmt.printfln("Odin:  %v",    ODIN_VERSION)
+		fmt.printfln("OS:    %v",    si.os_version.as_string)
+		fmt.printfln("OS:    %#v",   si.os_version)
+		fmt.printfln("CPU:   %v",    si.cpu_name)
+		fmt.printfln("RAM:   %#.1M", si.ram.total_ram)
+
+		// fmt.printfln("Features: %v",      si.cpu_features)
+		// fmt.printfln("MacOS version: %v", si.macos_version)
 
 		fmt.println()
 		for gpu, i in si.gpus {
-			fmt.printf("GPU #%v:\n", i)
-			fmt.printf("\tVendor: %v\n",     gpu.vendor_name)
-			fmt.printf("\tModel:  %v\n",     gpu.model_name)
-			fmt.printf("\tVRAM:   %v MiB\n", gpu.total_ram / 1024 / 1024)
+			fmt.printfln("GPU #%v:", i)
+			fmt.printfln("\tVendor: %v",    gpu.vendor_name)
+			fmt.printfln("\tModel:  %v",    gpu.model_name)
+			fmt.printfln("\tVRAM:   %#.1M", gpu.total_ram)
 		}
 	}
 
@@ -51,11 +54,11 @@ Example:
 		as_string = "Windows 10 Professional (version: 20H2), build: 19042.1466",
 	}
 	CPU:   AMD Ryzen 7 1800X Eight-Core Processor
-	RAM:   65469 MiB
+	RAM:   64.0 GiB
 	GPU #0:
 		Vendor: Advanced Micro Devices, Inc.
 		Model:  Radeon RX Vega
-		VRAM:   8176 MiB
+		VRAM:   8.0 GiB
 
 - Example macOS output:
 
@@ -73,6 +76,6 @@ Example:
 			as_string = "macOS Monterey 12.4 (build 21F79, kernel 21.5.0)",
 	}
 	CPU:  Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
-	RAM:  8192 MiB
+	RAM:  8.0 GiB
 */
 package sysinfo

core/sys/info/platform_darwin.odin

@@ -1,4 +1,3 @@
-// +build darwin
 package sysinfo
 
 import sys "core:sys/unix"
@@ -76,6 +75,8 @@ init_os_version :: proc () {
 	os_version.minor = rel.darwin.y
 	os_version.patch = rel.darwin.z
 
+	macos_version = transmute(Version)rel.release.version
+
 	strings.write_string(&b, rel.os_name)
 	if match == .Exact || match == .Nearest {
 		strings.write_rune(&b, ' ')
@@ -113,7 +114,7 @@ init_os_version :: proc () {
 	os_version.as_string = strings.to_string(b)
 }
 
-@(init)
+@(init, private)
 init_ram :: proc() {
 	// Retrieve RAM info using `sysctl`
 

core/sys/info/platform_freebsd.odin

@@ -1,4 +1,3 @@
-// +build freebsd
 package sysinfo
 
 import sys "core:sys/unix"
@@ -68,7 +67,7 @@ init_os_version :: proc () {
 	}
 }
 
-@(init)
+@(init, private)
 init_ram :: proc() {
 	// Retrieve RAM info using `sysctl`
 	mib := []i32{sys.CTL_HW, sys.HW_PHYSMEM}

core/sys/info/platform_linux.odin

@@ -1,11 +1,9 @@
-// +build linux
 package sysinfo
 
 import "base:intrinsics"
-import "base:runtime"
-import "core:strings"
-import "core:strconv"
 
+import "core:strconv"
+import "core:strings"
 import "core:sys/linux"
 
 @(private)
@@ -14,32 +12,37 @@ version_string_buf: [1024]u8
 @(init, private)
 init_os_version :: proc () {
 	os_version.platform = .Linux
-	// Try to parse `/etc/os-release` for `PRETTY_NAME="Ubuntu 20.04.3 LTS`
-	fd, errno := linux.open("/etc/os-release", {.RDONLY}, {})
-	assert(errno == .NONE, "Failed to read /etc/os-release")
-	defer {
-		cerrno := linux.close(fd)
-		assert(cerrno == .NONE, "Failed to close the file descriptor")
-	}
-	os_release_buf: [2048]u8
-	n, read_errno := linux.read(fd, os_release_buf[:])
-	assert(read_errno == .NONE, "Failed to read data from /etc/os-release")
-	release := string(os_release_buf[:n])
-	// Search the line in the file until we find "PRETTY_NAME="
-	NEEDLE :: "PRETTY_NAME=\""
-	pretty_start := strings.index(release, NEEDLE)
+
 	b := strings.builder_from_bytes(version_string_buf[:])
-	if pretty_start > 0 {
-		for r, i in release[pretty_start + len(NEEDLE):] {
-			if r == '"' {
-				strings.write_string(&b, release[pretty_start + len(NEEDLE):][:i])
-				break
-			} else if r == '\r' || r == '\n' {
-				strings.write_string(&b, "Unknown Linux Distro")
-				break
+
+	// Try to parse `/etc/os-release` for `PRETTY_NAME="Ubuntu 20.04.3 LTS`
+	{
+		fd, errno := linux.open("/etc/os-release", {})
+		assert(errno == .NONE, "Failed to read /etc/os-release")
+		defer {
+			cerrno := linux.close(fd)
+			assert(cerrno == .NONE, "Failed to close the file descriptor")
+		}
+
+		os_release_buf: [2048]u8
+		n, read_errno := linux.read(fd, os_release_buf[:])
+		assert(read_errno == .NONE, "Failed to read data from /etc/os-release")
+		release := string(os_release_buf[:n])
+
+		// Search the line in the file until we find "PRETTY_NAME="
+		NEEDLE :: "PRETTY_NAME=\""
+		_, _, post := strings.partition(release, NEEDLE)
+		if len(post) > 0 {
+			end := strings.index_any(post, "\"\n")
+			if end > -1 && post[end] == '"' {
+				strings.write_string(&b, post[:end])
 			}
 		}
+		if strings.builder_len(b) == 0 {
+			strings.write_string(&b, "Unknown Linux Distro")
+		}
 	}
+
 	// Grab kernel info using `uname()` syscall, https://linux.die.net/man/2/uname
 	uts: linux.UTS_Name
 	uname_errno := linux.uname(&uts)
@@ -48,31 +51,39 @@ init_os_version :: proc () {
 	strings.write_string(&b, ", ")
 	strings.write_string(&b, string(cstring(&uts.sysname[0])))
 	strings.write_rune(&b, ' ')
-	l := strings.builder_len(b)
+
+	release_i := strings.builder_len(b)
 	strings.write_string(&b, string(cstring(&uts.release[0])))
-	// Parse kernel version, as substrings of the version info in `version_string_buf`
-	runtime.DEFAULT_TEMP_ALLOCATOR_TEMP_GUARD()
-	version_bits := strings.split_n(strings.to_string(b)[l:], "-", 2, context.temp_allocator)
-	if len(version_bits) > 1 {
-		os_version.version = version_bits[1]
-	}
-	// Parse major, minor, patch from release info
-	triplet := strings.split(version_bits[0], ".", context.temp_allocator)
-	if len(triplet) == 3 {
-		major, major_ok := strconv.parse_int(triplet[0])
-		minor, minor_ok := strconv.parse_int(triplet[1])
-		patch, patch_ok := strconv.parse_int(triplet[2])
-		if major_ok && minor_ok && patch_ok {
-			os_version.major = major
-			os_version.minor = minor
-			os_version.patch = patch
+	release_str := string(b.buf[release_i:])
+
+	os_version.as_string = strings.to_string(b)
+
+	// Parse the Linux version out of the release string
+	{
+		version_num, _, version_suffix := strings.partition(release_str, "-")
+		os_version.version = version_suffix
+
+		i: int
+		for part in strings.split_iterator(&version_num, ".") {
+			defer i += 1
+
+			dst: ^int
+			switch i {
+			case 0: dst = &os_version.major
+			case 1: dst = &os_version.minor
+			case 2: dst = &os_version.patch
+			case:   break
+			}
+
+			num, ok := strconv.parse_int(part)
+			if !ok { break }
+
+			dst^ = num
 		}
 	}
-	// Finish the string
-	os_version.as_string = strings.to_string(b)
 }
 
-@(init)
+@(init, private)
 init_ram :: proc() {
 	// Retrieve RAM info using `sysinfo`
 	sys_info: linux.Sys_Info
@@ -84,4 +95,4 @@ init_ram :: proc() {
 		total_swap = int(sys_info.totalswap) * int(sys_info.mem_unit),
 		free_swap  = int(sys_info.freeswap)  * int(sys_info.mem_unit),
 	}
-}
+}

core/sys/info/platform_openbsd.odin

@@ -1,4 +1,3 @@
-// +build openbsd
 package sysinfo
 
 import sys "core:sys/unix"
@@ -61,7 +60,7 @@ init_os_version :: proc () {
 	os_version.as_string = strings.to_string(b)
 }
 
-@(init)
+@(init, private)
 init_ram :: proc() {
 	// Retrieve RAM info using `sysctl`
 	mib := []i32{sys.CTL_HW, sys.HW_PHYSMEM64}

core/sys/info/platform_windows.odin

@@ -1,4 +1,3 @@
-// +build windows
 package sysinfo
 
 import sys "core:sys/windows"
@@ -259,7 +258,7 @@ init_os_version :: proc () {
 	}
 }
 
-@(init)
+@(init, private)
 init_ram :: proc() {
 	state: sys.MEMORYSTATUSEX
 

core/sys/info/sysinfo.odin

@@ -8,6 +8,9 @@ os_version: OS_Version
 ram:        RAM
 gpus:       []GPU
 
+// Only on MacOS, contains the actual MacOS version, while the `os_version` contains the kernel version.
+macos_version: Version
+
 OS_Version_Platform :: enum {
 	Unknown,
 	Windows,
@@ -19,12 +22,14 @@ OS_Version_Platform :: enum {
 	NetBSD,
 }
 
+Version :: struct {
+	major, minor, patch: int,
+}
+
 OS_Version :: struct {
 	platform: OS_Version_Platform,
 
-	major:     int,
-	minor:     int,
-	patch:     int,
+	using _:   Version,
 	build:     [2]int,
 	version:   string,
 
@@ -42,4 +47,4 @@ GPU :: struct {
 	vendor_name: string,
 	model_name:  string,
 	total_ram:   int,
-}
+}

core/sys/unix/sysctl_darwin.odin

@@ -1,20 +1,29 @@
 //+build darwin
 package unix
 
-import "core:sys/darwin"
 import "base:intrinsics"
 
+import "core:c"
+import "core:sys/darwin"
+
 _ :: darwin
 
-sysctl :: proc(mib: []i32, val: ^$T) -> (ok: bool) {
-	mib := mib
-	result_size := i64(size_of(T))
+sysctl :: proc "contextless" (mib: []i32, val: ^$T) -> (ok: bool) {
+	result_size := c.size_t(size_of(T))
+	res := darwin.syscall_sysctl(
+		raw_data(mib), len(mib),
+		val, &result_size,
+		nil, 0,
+	)
+	return res == 0
+}
 
-	res := intrinsics.syscall(
-		darwin.unix_offset_syscall(.sysctl),
-		uintptr(raw_data(mib)), uintptr(len(mib)),
-		uintptr(val), uintptr(&result_size),
-		uintptr(0), uintptr(0),
+sysctlbyname :: proc "contextless" (name: string, val: ^$T) -> (ok: bool) {
+	result_size := c.size_t(size_of(T))
+	res := darwin.syscall_sysctlbyname(
+		name,
+		val, &result_size,
+		nil, 0,
 	)
 	return res == 0
 }

core/time/tsc_darwin.odin

@@ -1,21 +1,10 @@
 //+private
-//+build darwin
 package time
 
-import "core:c"
+import "core:sys/unix"
 
-foreign import libc "system:System.framework"
-foreign libc {
-	@(link_name="sysctlbyname") _sysctlbyname    :: proc(path: cstring, oldp: rawptr, oldlenp: rawptr, newp: rawptr, newlen: int) -> c.int ---
-}
-
-_get_tsc_frequency :: proc "contextless" () -> (u64, bool) {
-	tmp_freq : u64 = 0
-	tmp_size : i64 = size_of(tmp_freq)
-	ret := _sysctlbyname("machdep.tsc.frequency", &tmp_freq, &tmp_size, nil, 0)
-	if ret < 0 {
-		return 0, false
-	}
-
-	return tmp_freq, true
+_get_tsc_frequency :: proc "contextless" () -> (freq: u64, ok: bool) {
+	unix.sysctlbyname("machdep.tsc.frequency", &freq) or_return
+	ok = true
+	return
 }

src/bug_report.cpp

@@ -204,14 +204,27 @@ gb_internal void report_cpu_info() {
 	}
 
 	#elif defined(GB_CPU_ARM)
-		/*
-			TODO(Jeroen): On *nix, perhaps query `/proc/cpuinfo`.
-		*/
-		#if defined(GB_ARCH_64_BIT)
-			gb_printf("ARM64\n");
-		#else
-			gb_printf("ARM\n");
+		bool generic = true;
+
+		#if defined(GB_SYSTEM_OSX)
+			char cpu_name[128] = {};	
+			size_t cpu_name_size = 128;
+			if (sysctlbyname("machdep.cpu.brand_string", &cpu_name, &cpu_name_size, nullptr, 0) == 0) {
+				generic = false;
+				gb_printf("%s\n", (char *)&cpu_name[0]);
+			}
 		#endif
+
+		if (generic) {
+			/*
+				TODO(Jeroen): On *nix, perhaps query `/proc/cpuinfo`.
+			*/
+			#if defined(GB_ARCH_64_BIT)
+				gb_printf("ARM64\n");
+			#else
+				gb_printf("ARM\n");
+			#endif
+		}
 	#else
 		gb_printf("Unknown\n");
 	#endif