meta: add clang-format and reformat managarm sysdeps

.clang-format

@@ -0,0 +1,36 @@
+---
+BasedOnStyle: LLVM
+Language: Cpp
+
+ColumnLimit: 100
+IndentWidth: 4
+TabWidth: 4
+UseTab: ForIndentation
+
+ContinuationIndentWidth: 4
+ConstructorInitializerIndentWidth: 0
+IndentCaseLabels: true
+# Do not indent "public", "private", etc.
+AccessModifierOffset: -4
+
+AlignAfterOpenBracket: BlockIndent
+
+# Put template<> on its own line.
+BreakTemplateDeclarations: Yes
+# Put long return types on their own line.
+BreakAfterReturnType: Automatic
+# Put binary operators at the start of the line.
+BreakBeforeBinaryOperators: NonAssignment
+
+# Put all initializers onto their own lines.
+PackConstructorInitializers: CurrentLine
+
+# Put all function arguments on their own lines.
+BinPackArguments: false
+BinPackParameters: false
+
+# Format braces as {1, 2, 3}, not as { 1, 2, 3 }.
+Cpp11BracedListStyle: true
+
+# Force \n at EOF.
+InsertNewlineAtEOF: true

.github/workflows/pre-commit.yml

@@ -0,0 +1,21 @@
+name: pre-commit
+
+on: [merge_group, pull_request]
+
+jobs:
+  pre-commit:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    # Check .clang-format is up to date
+    - uses: actions/checkout@v4
+      with:
+        repository: 'managarm/common-config'
+        path: common-config
+    - run: 'cmp .clang-format common-config/.clang-format'
+      name: 'Check .clang-format is up to date'
+
+    # Check formatting
+    - uses: actions/setup-python@v3
+    - uses: pre-commit/[email protected]

.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+fail_fast: false
+repos:
+  - repo: https://github.com/pocc/pre-commit-hooks
+    rev: 336fdd7c3cab698ead0b1c95157b9e74d3906b62
+    hooks:
+      - id: clang-format
+        additional_dependencies: [clang-format==19.1.3]
+        args: ["-i"]
+        exclude: >
+          (?x)^(
+            options/ansi/musl-generic-math/.*|
+            options/ansi/generic/complex/.*|
+            options/posix/musl-generic-regex/.*
+          )
+        # Only enable on Managarm sysdeps for now.
+        files:
+          sysdeps/managarm/

README.md

@@ -49,6 +49,10 @@ The type of library to be built (static, shared, or both) is controlled by meson
 
 We also support building with `-Db_sanitize=undefined` to use UBSan inside mlibc. Note that this does not enable UBSan for external applications which link against `libc.so`, but it can be useful during development to detect internal bugs (e.g when adding new sysdeps).
 
+## Running pre-commit hooks
+
+To format your code before submitting a PR, you should install [`pre-commit`](https://pre-commit.com/). Then do `pre-commit install` to install the git hook which runs each time you commit. Alternatively, you can do `pre-commit run -a` to manually format all files.
+
 ## Running Tests
 
 The `mlibc` test suite can be run under a Linux host. To do this, first install a set of kernel headers (as described [here](https://docs.kernel.org/kbuild/headers_install.html)), then run from the project root:

options/ansi/generic/stdio.cpp

@@ -349,8 +349,8 @@ static void store_int(void *dest, unsigned int size, unsigned long long i) {
 
 template<typename H>
 static int do_scanf(H &handler, const char *fmt, __builtin_va_list args) {
-	#define NOMATCH_CHECK(cond) if(cond) return match_count // if cond is true, matching error
-	#define EOF_CHECK(cond) if(cond) return match_count ? match_count : EOF // if cond is true, no more data to read
+	#define NOMATCH_CHECK(cond) ({ if(cond) return match_count; }) // if cond is true, matching error
+	#define EOF_CHECK(cond) ({ if(cond) return match_count ? match_count : EOF; }) // if cond is true, no more data to read
 	int match_count = 0;
 	for (; *fmt; fmt++) {
 		if (isspace(*fmt)) {
@@ -891,20 +891,20 @@ int vsscanf(const char *__restrict buffer, const char *__restrict format, __buil
 	return result;
 }
 
-int fwprintf(FILE *__restrict, const wchar_t *__restrict, ...) MLIBC_STUB_BODY
-int fwscanf(FILE *__restrict, const wchar_t *__restrict, ...) MLIBC_STUB_BODY
-int vfwprintf(FILE *__restrict, const wchar_t *__restrict, __builtin_va_list) MLIBC_STUB_BODY
-int vfwscanf(FILE *__restrict, const wchar_t *__restrict, __builtin_va_list) MLIBC_STUB_BODY
+int fwprintf(FILE *__restrict, const wchar_t *__restrict, ...) { MLIBC_STUB_BODY; }
+int fwscanf(FILE *__restrict, const wchar_t *__restrict, ...) { MLIBC_STUB_BODY; }
+int vfwprintf(FILE *__restrict, const wchar_t *__restrict, __builtin_va_list) { MLIBC_STUB_BODY; }
+int vfwscanf(FILE *__restrict, const wchar_t *__restrict, __builtin_va_list) { MLIBC_STUB_BODY; }
 
-int swprintf(wchar_t *__restrict, size_t, const wchar_t *__restrict, ...) MLIBC_STUB_BODY
-int swscanf(wchar_t *__restrict, const wchar_t *__restrict, ...) MLIBC_STUB_BODY
-int vswprintf(wchar_t *__restrict, size_t, const wchar_t *__restrict, __builtin_va_list) MLIBC_STUB_BODY
-int vswscanf(wchar_t *__restrict, const wchar_t *__restrict, __builtin_va_list) MLIBC_STUB_BODY
+int swprintf(wchar_t *__restrict, size_t, const wchar_t *__restrict, ...) { MLIBC_STUB_BODY; }
+int swscanf(wchar_t *__restrict, const wchar_t *__restrict, ...) { MLIBC_STUB_BODY; }
+int vswprintf(wchar_t *__restrict, size_t, const wchar_t *__restrict, __builtin_va_list) { MLIBC_STUB_BODY; }
+int vswscanf(wchar_t *__restrict, const wchar_t *__restrict, __builtin_va_list) { MLIBC_STUB_BODY; }
 
-int wprintf(const wchar_t *__restrict, ...) MLIBC_STUB_BODY
-int wscanf(const wchar_t *__restrict, ...) MLIBC_STUB_BODY
-int vwprintf(const wchar_t *__restrict, __builtin_va_list) MLIBC_STUB_BODY
-int vwscanf(const wchar_t *__restrict, __builtin_va_list) MLIBC_STUB_BODY
+int wprintf(const wchar_t *__restrict, ...) { MLIBC_STUB_BODY; }
+int wscanf(const wchar_t *__restrict, ...) { MLIBC_STUB_BODY; }
+int vwprintf(const wchar_t *__restrict, __builtin_va_list) { MLIBC_STUB_BODY; }
+int vwscanf(const wchar_t *__restrict, __builtin_va_list) { MLIBC_STUB_BODY; }
 
 int fgetc(FILE *stream) {
 	char c;
@@ -1014,16 +1014,16 @@ int puts(const char *string) {
 	return 1;
 }
 
-wint_t fgetwc(FILE *) MLIBC_STUB_BODY
-wchar_t *fgetws(wchar_t *__restrict, int, FILE *__restrict) MLIBC_STUB_BODY
-wint_t fputwc(wchar_t, FILE *) MLIBC_STUB_BODY
-int fputws(const wchar_t *__restrict, FILE *__restrict) MLIBC_STUB_BODY
-int fwide(FILE *, int) MLIBC_STUB_BODY
-wint_t getwc(FILE *) MLIBC_STUB_BODY
-wint_t getwchar(void) MLIBC_STUB_BODY
-wint_t putwc(wchar_t, FILE *) MLIBC_STUB_BODY
-wint_t putwchar(wchar_t) MLIBC_STUB_BODY
-wint_t ungetwc(wint_t, FILE *) MLIBC_STUB_BODY
+wint_t fgetwc(FILE *) { MLIBC_STUB_BODY; }
+wchar_t *fgetws(wchar_t *__restrict, int, FILE *__restrict) { MLIBC_STUB_BODY; }
+wint_t fputwc(wchar_t, FILE *) { MLIBC_STUB_BODY; }
+int fputws(const wchar_t *__restrict, FILE *__restrict) { MLIBC_STUB_BODY; }
+int fwide(FILE *, int) { MLIBC_STUB_BODY; }
+wint_t getwc(FILE *) { MLIBC_STUB_BODY; }
+wint_t getwchar(void) { MLIBC_STUB_BODY; }
+wint_t putwc(wchar_t, FILE *) { MLIBC_STUB_BODY; }
+wint_t putwchar(wchar_t) { MLIBC_STUB_BODY; }
+wint_t ungetwc(wint_t, FILE *) { MLIBC_STUB_BODY; }
 
 size_t fread(void *buffer, size_t size, size_t count, FILE *file_base) {
 	auto file = static_cast<mlibc::abstract_file *>(file_base);

options/ansi/generic/string.cpp

@@ -231,9 +231,9 @@ char *strchrnul(const char *s, int c) {
 	return const_cast<char *>(s + i);
 }
 
-double wcstod(const wchar_t *__restrict, wchar_t **__restrict) MLIBC_STUB_BODY
-float wcstof(const wchar_t *__restrict, wchar_t **__restrict) MLIBC_STUB_BODY
-long double wcstold(const wchar_t *__restrict, wchar_t **__restrict) MLIBC_STUB_BODY
+double wcstod(const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
+float wcstof(const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
+long double wcstold(const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
 
 long wcstol(const wchar_t *__restrict nptr, wchar_t **__restrict endptr, int base)  {
 	return mlibc::stringToInteger<long, wchar_t>(nptr, endptr, base);
@@ -277,16 +277,16 @@ wchar_t *wcscat(wchar_t *__restrict dest, const wchar_t *__restrict src) {
 	return dest;
 }
 
-wchar_t *wcsncat(wchar_t *__restrict, const wchar_t *__restrict, size_t) MLIBC_STUB_BODY
+wchar_t *wcsncat(wchar_t *__restrict, const wchar_t *__restrict, size_t) { MLIBC_STUB_BODY; }
 
 int wcscmp(const wchar_t *l, const wchar_t *r) {
 	for(; *l == *r && *l && *r; l++, r++);
 	return *l - *r;
 }
 
-int wcscoll(const wchar_t *, const wchar_t *) MLIBC_STUB_BODY
-int wcsncmp(const wchar_t *, const wchar_t *, size_t) MLIBC_STUB_BODY
-int wcsxfrm(wchar_t *__restrict, const wchar_t *__restrict, size_t) MLIBC_STUB_BODY
+int wcscoll(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
+int wcsncmp(const wchar_t *, const wchar_t *, size_t) { MLIBC_STUB_BODY; }
+int wcsxfrm(wchar_t *__restrict, const wchar_t *__restrict, size_t) { MLIBC_STUB_BODY; }
 
 int wmemcmp(const wchar_t *a, const wchar_t *b, size_t size) {
 	for(size_t i = 0; i < size; i++) {
@@ -307,18 +307,18 @@ wchar_t *wcschr(const wchar_t *s, wchar_t c) {
 	return *s ? (wchar_t *)s : 0;
 }
 
-size_t wcscspn(const wchar_t *, const wchar_t *) MLIBC_STUB_BODY
-wchar_t *wcspbrk(const wchar_t *, const wchar_t *) MLIBC_STUB_BODY
+size_t wcscspn(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
+wchar_t *wcspbrk(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
 
 wchar_t *wcsrchr(const wchar_t *s, wchar_t c) {
 	const wchar_t *p;
 	for(p = s + wcslen(s); p >= s && *p != c; p--);
 	return p >= s ? (wchar_t *)p : 0;
 }
 
-size_t wcsspn(const wchar_t *, const wchar_t *) MLIBC_STUB_BODY
-wchar_t *wcsstr(const wchar_t *, const wchar_t *) MLIBC_STUB_BODY
-wchar_t *wcstok(wchar_t *__restrict, const wchar_t *__restrict, wchar_t **__restrict) MLIBC_STUB_BODY
+size_t wcsspn(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
+wchar_t *wcsstr(const wchar_t *, const wchar_t *) { MLIBC_STUB_BODY; }
+wchar_t *wcstok(wchar_t *__restrict, const wchar_t *__restrict, wchar_t **__restrict) { MLIBC_STUB_BODY; }
 
 wchar_t *wmemchr(const wchar_t *s, wchar_t c, size_t size) {
 	auto s_bytes = s;

options/ansi/generic/uchar.cpp

@@ -2,7 +2,7 @@
 #include <uchar.h>
 #include <wchar.h>
 
-size_t c32rtomb(char *, char32_t, mbstate_t *) MLIBC_STUB_BODY
+size_t c32rtomb(char *, char32_t, mbstate_t *) { MLIBC_STUB_BODY; }
 
 size_t mbrtoc32(char32_t *__restrict pc32, const char *__restrict pmb, size_t max, mbstate_t *__restrict ps) {
 	static mbstate_t internal_state;

options/ansi/generic/wctype.cpp

@@ -4,6 +4,6 @@
 #include <mlibc/debug.hpp>
 #include <frg/string.hpp>
 
-wctrans_t wctrans(const char *) MLIBC_STUB_BODY
-wint_t towctrans(wint_t, wctrans_t) MLIBC_STUB_BODY
+wctrans_t wctrans(const char *) { MLIBC_STUB_BODY; }
+wint_t towctrans(wint_t, wctrans_t) { MLIBC_STUB_BODY; }
 

options/internal/include/bits/ensure.h

@@ -35,7 +35,7 @@ void __ensure_warn(const char *assertion, const char *file, unsigned int line,
 			sysdep; \
 		})
 
-#define MLIBC_STUB_BODY { MLIBC_UNIMPLEMENTED(); __builtin_unreachable(); }
+#define MLIBC_STUB_BODY ({ MLIBC_UNIMPLEMENTED(); __builtin_unreachable(); })
 
 #ifdef __cplusplus
 }

options/rtld/include/mlibc/rtld-abi.hpp

@@ -1,7 +1,7 @@
 #ifndef MLIBC_RTLD_ABI
 #define MLIBC_RTLD_ABI
 
-#include <stdint.h>
+#include <stddef.h>
 
 #if defined(__x86_64__) || defined(__aarch64__) || defined(__i386__) || defined(__riscv) || defined (__m68k__)
 

sysdeps/aero/.clang-format

@@ -0,0 +1,2 @@
+---
+DisableFormat: true

sysdeps/astral/.clang-format

@@ -0,0 +1,2 @@
+---
+DisableFormat: true

sysdeps/dripos/.clang-format

@@ -0,0 +1,2 @@
+---
+DisableFormat: true

sysdeps/ironclad/.clang-format

@@ -0,0 +1,2 @@
+---
+DisableFormat: true

sysdeps/keyronex/.clang-format

@@ -0,0 +1,2 @@
+---
+DisableFormat: true

sysdeps/lemon/.clang-format

@@ -0,0 +1,2 @@
+---
+DisableFormat: true

sysdeps/linux/include/sys/syscall.h

@@ -6,7 +6,9 @@
  * (linux-headers, or an autogenerated stub while building), and an
  * autogenerated file containing SYS_ defines.
  */
+/* clang-format off */
 #include <linux/unistd.h>
 #include <bits/syscall_aliases.h>
+/* clang-format on */
 
 #endif /* _SYS_SYSCALL_H */

sysdeps/lyre/.clang-format

@@ -0,0 +1,2 @@
+---
+DisableFormat: true

sysdeps/managarm/aarch64/thread.cpp

@@ -1,18 +1,18 @@
-#include <mlibc/thread-entry.hpp>
-#include <mlibc/all-sysdeps.hpp>
-#include <mlibc/tcb.hpp>
 #include <bits/ensure.h>
-#include <sys/mman.h>
 #include <errno.h>
-#include <stdint.h>
+#include <mlibc/all-sysdeps.hpp>
+#include <mlibc/tcb.hpp>
+#include <mlibc/thread-entry.hpp>
 #include <stddef.h>
+#include <stdint.h>
+#include <sys/mman.h>
 
 extern "C" void __mlibc_enter_thread(void *entry, void *user_arg, Tcb *tcb) {
 	// Wait until our parent sets up the TID.
-	while(!__atomic_load_n(&tcb->tid, __ATOMIC_RELAXED))
+	while (!__atomic_load_n(&tcb->tid, __ATOMIC_RELAXED))
 		mlibc::sys_futex_wait(&tcb->tid, 0, nullptr);
 
-	if(mlibc::sys_tcb_set(tcb))
+	if (mlibc::sys_tcb_set(tcb))
 		__ensure(!"sys_tcb_set() failed");
 
 	tcb->invokeThreadFunc(entry, user_arg);
@@ -29,28 +29,37 @@ namespace mlibc {
 
 static constexpr size_t default_stacksize = 0x200000;
 
-int sys_prepare_stack(void **stack, void *entry, void *user_arg, void *tcb, size_t *stack_size, size_t *guard_size, void **stack_base) {
+int sys_prepare_stack(
+    void **stack,
+    void *entry,
+    void *user_arg,
+    void *tcb,
+    size_t *stack_size,
+    size_t *guard_size,
+    void **stack_base
+) {
 	if (!*stack_size)
 		*stack_size = default_stacksize;
 	*guard_size = 0;
 
 	if (*stack) {
 		*stack_base = *stack;
 	} else {
-		*stack_base = mmap(nullptr, *stack_size, PROT_READ | PROT_WRITE,
-						MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
-		if(*stack_base == MAP_FAILED) {
+		*stack_base =
+		    mmap(nullptr, *stack_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
+		if (*stack_base == MAP_FAILED) {
 			return errno;
 		}
 	}
-
-	uintptr_t *sp = reinterpret_cast<uintptr_t *>(reinterpret_cast<uintptr_t>(*stack_base) + *stack_size);
+
+	uintptr_t *sp =
+	    reinterpret_cast<uintptr_t *>(reinterpret_cast<uintptr_t>(*stack_base) + *stack_size);
 
 	*--sp = reinterpret_cast<uintptr_t>(tcb);
 	*--sp = reinterpret_cast<uintptr_t>(user_arg);
 	*--sp = reinterpret_cast<uintptr_t>(entry);
-	*stack = reinterpret_cast<void*>(sp);
+	*stack = reinterpret_cast<void *>(sp);
 	return 0;
 }
 
-} //namespace mlibc
+} // namespace mlibc