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12 | 12 | use StaticPHP\Attribute\Artifact\CustomBinaryCheckUpdate; |
13 | 13 | use StaticPHP\Exception\DownloaderException; |
14 | 14 | use StaticPHP\Runtime\SystemTarget; |
| 15 | +use StaticPHP\Util\FileSystem; |
15 | 16 |
|
16 | 17 | class zig |
17 | 18 | { |
@@ -131,5 +132,151 @@ public function postExtractZig(string $target_path): void |
131 | 132 | chmod("{$target_path}/zig-ld.lld", 0755); |
132 | 133 | chmod("{$target_path}/zig-ranlib", 0755); |
133 | 134 | chmod("{$target_path}/zig-objcopy", 0755); |
| 135 | + |
| 136 | + // Build the clang runtime bits zig 0.15+ doesn't ship: profile runtime |
| 137 | + // (so -fprofile-generate actually emits .profraw) and crtbegin/crtend |
| 138 | + // (so shared libs get __dso_handle and the __cxa_finalize atexit hook). |
| 139 | + // These get auto-linked by the zig-cc wrapper when the right flags fly past. |
| 140 | + $this->buildClangRuntimeBits($target_path); |
| 141 | + } |
| 142 | + |
| 143 | + /** |
| 144 | + * Detect the bundled clang version and build the missing clang runtime |
| 145 | + * archives into `<zig>/lib/`. Compiles from a 2 MB compiler-rt-<llvm>.src |
| 146 | + * tarball — far cheaper than fetching the 2 GB prebuilt LLVM tarball. |
| 147 | + */ |
| 148 | + private function buildClangRuntimeBits(string $zig_bin_dir): void |
| 149 | + { |
| 150 | + if (PHP_OS_FAMILY !== 'Linux') { |
| 151 | + return; |
| 152 | + } |
| 153 | + $libDir = "{$zig_bin_dir}/lib"; |
| 154 | + $profileLib = "{$libDir}/libclang_rt.profile.a"; |
| 155 | + $crtBegin = "{$libDir}/clang_rt.crtbegin.o"; |
| 156 | + $crtEnd = "{$libDir}/clang_rt.crtend.o"; |
| 157 | + if (file_exists($profileLib) && file_exists($crtBegin) && file_exists($crtEnd)) { |
| 158 | + return; |
| 159 | + } |
| 160 | + |
| 161 | + $zig = "{$zig_bin_dir}/zig"; |
| 162 | + $verLine = trim((string) shell_exec(escapeshellarg($zig) . ' cc --version 2>/dev/null')); |
| 163 | + if (!preg_match('/clang version (\d+\.\d+\.\d+)/', $verLine, $m)) { |
| 164 | + logger()->warning('[zig] could not detect bundled clang version; skipping runtime bit build (PGO + shared libs without __dso_handle will fail to link)'); |
| 165 | + return; |
| 166 | + } |
| 167 | + $llvmVersion = $m[1]; |
| 168 | + logger()->info("Building clang runtime bits for LLVM {$llvmVersion} (zig's bundled clang)"); |
| 169 | + |
| 170 | + $srcRoot = $this->fetchCompilerRtSource($llvmVersion); |
| 171 | + if ($srcRoot === null) { |
| 172 | + return; |
| 173 | + } |
| 174 | + |
| 175 | + f_mkdir($libDir, recursive: true); |
| 176 | + if (!file_exists($profileLib)) { |
| 177 | + $this->buildProfileRuntime($zig, $srcRoot, $profileLib); |
| 178 | + } |
| 179 | + if (!file_exists($crtBegin) || !file_exists($crtEnd)) { |
| 180 | + $this->buildCrtObjects($zig, $srcRoot, $crtBegin, $crtEnd); |
| 181 | + } |
| 182 | + FileSystem::removeDir($srcRoot); |
| 183 | + } |
| 184 | + |
| 185 | + private function fetchCompilerRtSource(string $llvmVersion): ?string |
| 186 | + { |
| 187 | + $tarball = "compiler-rt-{$llvmVersion}.src.tar.xz"; |
| 188 | + $url = "https://github.com/llvm/llvm-project/releases/download/llvmorg-{$llvmVersion}/{$tarball}"; |
| 189 | + $tarballPath = DOWNLOAD_PATH . '/' . $tarball; |
| 190 | + if (!file_exists($tarballPath)) { |
| 191 | + try { |
| 192 | + default_shell()->executeCurlDownload($url, $tarballPath); |
| 193 | + } catch (\Throwable $e) { |
| 194 | + logger()->warning("[zig] failed to download {$tarball}: {$e->getMessage()}"); |
| 195 | + return null; |
| 196 | + } |
| 197 | + } |
| 198 | + $srcRoot = PKG_ROOT_PATH . "/compiler-rt-src-{$llvmVersion}"; |
| 199 | + FileSystem::removeDir($srcRoot); |
| 200 | + FileSystem::createDir($srcRoot); |
| 201 | + try { |
| 202 | + default_shell()->executeTarExtract($tarballPath, $srcRoot, 'xz'); |
| 203 | + } catch (\Throwable $e) { |
| 204 | + logger()->warning("[zig] failed to extract {$tarball}: {$e->getMessage()}"); |
| 205 | + return null; |
| 206 | + } |
| 207 | + return $srcRoot; |
| 208 | + } |
| 209 | + |
| 210 | + private function buildProfileRuntime(string $zig, string $srcRoot, string $libPath): void |
| 211 | + { |
| 212 | + $profileSrc = "{$srcRoot}/lib/profile"; |
| 213 | + $profileInc = "{$srcRoot}/include"; |
| 214 | + if (!is_dir($profileSrc)) { |
| 215 | + logger()->warning("[zig] profile src dir missing at {$profileSrc} — PGO will not work"); |
| 216 | + return; |
| 217 | + } |
| 218 | + $sources = array_merge( |
| 219 | + glob("{$profileSrc}/*.c") ?: [], |
| 220 | + glob("{$profileSrc}/*.cpp") ?: [] |
| 221 | + ); |
| 222 | + // Keep Linux-only compilation units; the others bring in OS-specific headers |
| 223 | + // we can't satisfy without their respective SDKs. |
| 224 | + $skip = ['/PlatformAIX', '/PlatformDarwin', '/PlatformFuchsia', '/PlatformOther', '/PlatformWindows', '/WindowsMMap']; |
| 225 | + $sources = array_filter($sources, function ($f) use ($skip) { |
| 226 | + foreach ($skip as $s) { |
| 227 | + if (str_contains($f, $s)) { |
| 228 | + return false; |
| 229 | + } |
| 230 | + } |
| 231 | + return true; |
| 232 | + }); |
| 233 | + |
| 234 | + $objDir = "{$srcRoot}/obj-profile"; |
| 235 | + f_mkdir($objDir, recursive: true); |
| 236 | + $cflags = '-c -O2 -fPIC -fvisibility=hidden ' . |
| 237 | + '-I' . escapeshellarg($profileInc) . ' ' . |
| 238 | + '-DCOMPILER_RT_HAS_ATOMICS=1 -DCOMPILER_RT_HAS_FCNTL_LCK=1 -DCOMPILER_RT_HAS_UNAME=1'; |
| 239 | + $objs = []; |
| 240 | + foreach ($sources as $src) { |
| 241 | + $obj = $objDir . '/' . pathinfo($src, PATHINFO_FILENAME) . '.o'; |
| 242 | + $cmd = escapeshellarg($zig) . ' cc ' . $cflags . ' -o ' . escapeshellarg($obj) . ' ' . escapeshellarg($src) . ' 2>&1'; |
| 243 | + if (!$this->runZigCmd($cmd, $obj, "failed to compile {$src}")) { |
| 244 | + return; |
| 245 | + } |
| 246 | + $objs[] = $obj; |
| 247 | + } |
| 248 | + $arCmd = escapeshellarg($zig) . ' ar rcs ' . escapeshellarg($libPath) . ' ' . implode(' ', array_map('escapeshellarg', $objs)) . ' 2>&1'; |
| 249 | + if (!$this->runZigCmd($arCmd, $libPath, 'zig ar failed')) { |
| 250 | + return; |
| 251 | + } |
| 252 | + logger()->info('[zig] libclang_rt.profile.a installed (' . filesize($libPath) . ' bytes)'); |
| 253 | + } |
| 254 | + |
| 255 | + private function buildCrtObjects(string $zig, string $srcRoot, string $crtBegin, string $crtEnd): void |
| 256 | + { |
| 257 | + $beginSrc = "{$srcRoot}/lib/builtins/crtbegin.c"; |
| 258 | + $endSrc = "{$srcRoot}/lib/builtins/crtend.c"; |
| 259 | + if (!is_file($beginSrc) || !is_file($endSrc)) { |
| 260 | + logger()->error("[zig] crtbegin/crtend source missing under {$srcRoot}/lib/builtins — shared libs will lack __dso_handle"); |
| 261 | + return; |
| 262 | + } |
| 263 | + $cflags = '-c -O2 -fPIC -fvisibility=hidden -DCRT_HAS_INITFINI_ARRAY'; |
| 264 | + foreach ([[$beginSrc, $crtBegin], [$endSrc, $crtEnd]] as [$src, $dst]) { |
| 265 | + $cmd = escapeshellarg($zig) . ' cc ' . $cflags . ' -o ' . escapeshellarg($dst) . ' ' . escapeshellarg($src) . ' 2>&1'; |
| 266 | + if (!$this->runZigCmd($cmd, $dst, "failed to compile {$src}")) { |
| 267 | + return; |
| 268 | + } |
| 269 | + } |
| 270 | + logger()->info('[zig] clang_rt.crtbegin.o + clang_rt.crtend.o installed (' . filesize($crtBegin) . ' + ' . filesize($crtEnd) . ' bytes)'); |
| 271 | + } |
| 272 | + |
| 273 | + private function runZigCmd(string $cmd, string $dst, string $errPrefix): bool |
| 274 | + { |
| 275 | + exec($cmd, $out, $rc); |
| 276 | + if ($rc !== 0 || !is_file($dst)) { |
| 277 | + logger()->warning("[zig] {$errPrefix}: " . implode("\n", $out)); |
| 278 | + return false; |
| 279 | + } |
| 280 | + return true; |
134 | 281 | } |
135 | 282 | } |
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