git.m6w6.name Git - m6w6/ext-psi/blob - src/libjit.c

   1 #ifdef HAVE_CONFIG_H
   2 # include "config.h"
   3 #endif
   4
   5 #include "php.h"
   6
   7 #ifdef HAVE_LIBJIT
   8
   9 #include "php_psi.h"
  10 #include "libjit.h"
  11
  12 #include <jit/jit.h>
  13
  14 static void psi_jit_handler(jit_type_t _sig, void *result, void **_args, void *_data);
  15 static inline jit_type_t psi_jit_decl_arg_type(decl_arg *darg);
  16
  17 static inline jit_abi_t psi_jit_abi(const char *convention) {
  18         return jit_abi_cdecl;
  19 }
  20 static inline jit_type_t psi_jit_token_type(token_t t) {
  21         switch (t) {
  22         default:
  23                 ZEND_ASSERT(0);
  24                 /* no break */
  25         case PSI_T_VOID:
  26                 return jit_type_void;
  27         case PSI_T_INT8:
  28                 return jit_type_sbyte;
  29         case PSI_T_UINT8:
  30                 return jit_type_ubyte;
  31         case PSI_T_INT16:
  32                 return jit_type_short;
  33         case PSI_T_UINT16:
  34                 return jit_type_ushort;
  35         case PSI_T_INT32:
  36                 return jit_type_int;
  37         case PSI_T_UINT32:
  38                 return jit_type_uint;
  39         case PSI_T_INT64:
  40                 return jit_type_long;
  41         case PSI_T_UINT64:
  42                 return jit_type_ulong;
  43         case PSI_T_BOOL:
  44                 return jit_type_sys_bool;
  45         case PSI_T_INT:
  46                 return jit_type_sys_int;
  47         case PSI_T_LONG:
  48                 return jit_type_sys_long;
  49         case PSI_T_FLOAT:
  50                 return jit_type_sys_float;
  51         case PSI_T_DOUBLE:
  52                 return jit_type_sys_double;
  53 #ifdef HAVE_LONG_DOUBLE
  54         case PSI_T_LONG_DOUBLE:
  55                 return jit_type_sys_long_double;
  56 #endif
  57         case PSI_T_POINTER:
  58                 return jit_type_void_ptr;
  59         }
  60 }
  61 static inline jit_type_t psi_jit_impl_type(token_t impl_type) {
  62         switch (impl_type) {
  63         case PSI_T_BOOL:
  64                 return jit_type_sbyte;
  65         case PSI_T_INT:
  66                 return jit_type_long;
  67         case PSI_T_STRING:
  68                 return jit_type_void_ptr;
  69         case PSI_T_FLOAT:
  70         case PSI_T_DOUBLE:
  71                 return jit_type_sys_double;
  72         EMPTY_SWITCH_DEFAULT_CASE();
  73         }
  74         return NULL;
  75 }
  76
  77 static void psi_jit_struct_type_dtor(void *type) {
  78         jit_type_t strct = type;
  79
  80         jit_type_free(strct);
  81 }
  82
  83 static size_t psi_jit_struct_type_pad(jit_type_t *els, size_t padding) {
  84         size_t i;
  85
  86         for (i = 0; i < padding; ++i) {
  87                 *els++ = jit_type_copy(jit_type_sys_char);
  88         }
  89
  90         return padding;
  91 }
  92
  93 static unsigned psi_jit_struct_type_elements(decl_struct *strct, jit_type_t **fields) {
  94         size_t i, argc = strct->args->count, nels = 0, offset = 0, maxalign;
  95         *fields = calloc(argc + 1, sizeof(*fields));
  96
  97         for (i = 0; i < strct->args->count; ++i) {
  98                 decl_arg *darg = strct->args->args[i];
  99                 jit_type_t type = jit_type_copy(psi_jit_decl_arg_type(darg));
 100                 size_t padding, alignment;
 101
 102                 ZEND_ASSERT(jit_type_get_size(type) == darg->layout->len);
 103
 104                 if ((alignment = jit_type_get_alignment(type)) > maxalign) {
 105                         maxalign = alignment;
 106                 }
 107
 108                 if ((padding = psi_offset_padding(darg->layout->pos - offset, alignment))) {
 109                         if (nels + padding > argc) {
 110                                 argc += padding;
 111                                 *fields = realloc(*fields, (argc + 1) * sizeof(*fields));
 112                         }
 113                         psi_jit_struct_type_pad(&(*fields)[nels], padding);
 114                         nels += padding;
 115                         offset += padding;
 116                 }
 117                 ZEND_ASSERT(offset == darg->layout->pos);
 118
 119                 offset = (offset + darg->layout->len + alignment - 1) & ~(alignment - 1);
 120                 (*fields)[nels++] = type;
 121         }
 122
 123         /* apply struct alignment padding */
 124         offset = (offset + maxalign - 1) & ~(maxalign - 1);
 125
 126         ZEND_ASSERT(offset <= strct->size);
 127         if (offset < strct->size) {
 128                 nels += psi_jit_struct_type_pad(&(*fields)[nels], strct->size - offset);
 129         }
 130
 131         return nels;
 132 }
 133 static inline jit_type_t psi_jit_decl_type(decl_type *type) {
 134         decl_type *real = real_decl_type(type);
 135
 136         if (real->type == PSI_T_STRUCT) {
 137                 if (!real->strct->engine.type) {
 138                         unsigned count;
 139                         jit_type_t strct, *fields = NULL;
 140
 141                         count = psi_jit_struct_type_elements(real->strct, &fields);
 142                         strct = jit_type_create_struct(fields, count, 0);
 143
 144                         real->strct->engine.type = strct;
 145                         real->strct->engine.dtor = psi_jit_struct_type_dtor;
 146                 }
 147
 148                 return real->strct->engine.type;
 149         }
 150         return psi_jit_token_type(real->type);
 151 }
 152 static inline jit_type_t psi_jit_decl_arg_type(decl_arg *darg) {
 153         if (darg->var->pointer_level) {
 154                 return jit_type_void_ptr;
 155         } else {
 156                 return psi_jit_decl_type(darg->type);
 157         }
 158 }
 159
 160 typedef struct PSI_LibjitContext {
 161         jit_context_t jit;
 162         jit_type_t signature;
 163         struct {
 164                 struct PSI_LibjitData **list;
 165                 size_t count;
 166         } data;
 167 } PSI_LibjitContext;
 168
 169 typedef struct PSI_LibjitCall {
 170         void *closure;
 171         jit_type_t signature;
 172         void *params[1]; /* [type1, type2, NULL, arg1, arg2] ... */
 173 } PSI_LibjitCall;
 174
 175 typedef struct PSI_LibjitData {
 176         PSI_LibjitContext *context;
 177         impl *impl;
 178         zend_internal_arg_info *arginfo;
 179 } PSI_LibjitData;
 180
 181 static inline PSI_LibjitCall *PSI_LibjitCallAlloc(PSI_Context *C, decl *decl) {
 182         size_t i, c = decl->args ? decl->args->count : 0;
 183         PSI_LibjitCall *call = calloc(1, sizeof(*call) + 2 * c * sizeof(void *));
 184
 185         for (i = 0; i < c; ++i) {
 186                 call->params[i] = psi_jit_decl_arg_type(decl->args->args[i]);
 187         }
 188         call->params[c] = NULL;
 189
 190         decl->call.info = call;
 191         decl->call.rval = &decl->func->ptr;
 192         decl->call.argc = c;
 193         decl->call.args = (void **) &call->params[c+1];
 194
 195         call->signature = jit_type_create_signature(
 196                         psi_jit_abi(decl->abi->convention),
 197                         psi_jit_decl_arg_type(decl->func),
 198                         (jit_type_t *) call->params, c, 1);
 199         return call;
 200 }
 201
 202 static inline void PSI_LibjitCallInitClosure(PSI_Context *C, PSI_LibjitCall *call, impl *impl) {
 203         PSI_LibjitContext *context = C->context;
 204         call->closure = jit_closure_create(context->jit, context->signature,
 205                         &psi_jit_handler, impl);
 206 }
 207
 208 static inline void PSI_LibjitCallFree(PSI_LibjitCall *call) {
 209         jit_type_free(call->signature);
 210         free(call);
 211 }
 212
 213 static inline PSI_LibjitContext *PSI_LibjitContextInit(PSI_LibjitContext *L) {
 214         jit_type_t params[] = {
 215                 jit_type_void_ptr,
 216                 jit_type_void_ptr
 217         };
 218
 219         if (!L) {
 220                 L = malloc(sizeof(*L));
 221         }
 222         memset(L, 0, sizeof(*L));
 223
 224         L->jit = jit_context_create();
 225         L->signature = jit_type_create_signature(jit_abi_cdecl, jit_type_void,
 226                         params, 2, 1);
 227
 228         return L;
 229 }
 230
 231 static inline void PSI_LibjitContextDtor(PSI_LibjitContext *L) {
 232         jit_type_free(L->signature);
 233         jit_context_destroy(L->jit);
 234 }
 235
 236 static inline void PSI_LibjitContextFree(PSI_LibjitContext **L) {
 237         if (*L) {
 238                 PSI_LibjitContextDtor(*L);
 239                 free(*L);
 240                 *L = NULL;
 241         }
 242 }
 243
 244 static void psi_jit_handler(jit_type_t _sig, void *result, void **_args, void *_data)
 245 {
 246         psi_call(*(zend_execute_data **)_args[0], *(zval **)_args[1], _data);
 247 }
 248
 249 static void psi_jit_init(PSI_Context *C)
 250 {
 251         C->context = PSI_LibjitContextInit(NULL);
 252 }
 253
 254 static void psi_jit_dtor(PSI_Context *C)
 255 {
 256         if (C->decls) {
 257                 size_t i;
 258
 259                 for (i = 0; i < C->decls->count; ++i) {
 260                         decl *decl = C->decls->list[i];
 261
 262                         PSI_LibjitCallFree(decl->call.info);
 263                 }
 264         }
 265         PSI_LibjitContextFree((void *) &C->context);
 266 }
 267
 268 static zend_function_entry *psi_jit_compile(PSI_Context *C)
 269 {
 270         size_t i, j = 0;
 271         zend_function_entry *zfe;
 272         PSI_LibjitContext *ctx = C->context;
 273
 274         if (!C->impls) {
 275                 return NULL;
 276         }
 277
 278         zfe = calloc(C->impls->count + 1, sizeof(*zfe));
 279         jit_context_build_start(ctx->jit);
 280
 281         for (i = 0; i < C->impls->count; ++i) {
 282                 zend_function_entry *zf = &zfe[j];
 283                 PSI_LibjitCall *call;
 284                 impl *impl = C->impls->list[i];
 285
 286                 if (!impl->decl) {
 287                         continue;
 288                 }
 289
 290                 call = PSI_LibjitCallAlloc(C, impl->decl);
 291                 PSI_LibjitCallInitClosure(C, call, impl);
 292
 293                 zf->fname = impl->func->name + (impl->func->name[0] == '\\');
 294                 zf->num_args = impl->func->args->count;
 295                 zf->handler = call->closure;
 296                 zf->arg_info = psi_internal_arginfo(impl);
 297                 ++j;
 298         }
 299
 300         for (i = 0; i < C->decls->count; ++i) {
 301                 decl *decl = C->decls->list[i];
 302
 303                 if (decl->impl) {
 304                         continue;
 305                 }
 306
 307                 PSI_LibjitCallAlloc(C, decl);
 308         }
 309
 310         jit_context_build_end(ctx->jit);
 311
 312         return zfe;
 313 }
 314
 315 static void psi_jit_call(PSI_Context *C, decl_callinfo *decl_call, impl_vararg *va) {
 316         PSI_LibjitCall *call = decl_call->info;
 317
 318         if (va) {
 319                 jit_type_t signature;
 320                 size_t i, nfixedargs = decl_call->argc, ntotalargs = nfixedargs + va->args->count;
 321                 void **params = calloc(2 * ntotalargs + 2, sizeof(void *));
 322
 323                 for (i = 0; i < nfixedargs; ++i) {
 324                         params[i] = call->params[i];
 325                         params[i + ntotalargs + 1] = call->params[i + nfixedargs + 1];
 326                 }
 327                 for (i = 0; i < va->args->count; ++i) {
 328                         params[nfixedargs + i] = psi_jit_impl_type(va->types[i]);
 329                         params[nfixedargs + i + ntotalargs + 1] = &va->values[i];
 330                 }
 331
 332                 signature = jit_type_create_signature(
 333                                 jit_type_get_abi(call->signature),
 334                                 jit_type_get_return(call->signature),
 335                                 (jit_type_t *) params, ntotalargs, 1);
 336                 ZEND_ASSERT(signature);
 337
 338                 jit_apply(signature, decl_call->sym, &params[ntotalargs + 1],
 339                                                 nfixedargs, *decl_call->rval);
 340                 jit_type_free(signature);
 341                 free(params);
 342         } else {
 343                 jit_apply(call->signature, decl_call->sym, decl_call->args,
 344                                 decl_call->argc, *decl_call->rval);
 345         }
 346 }
 347
 348 static PSI_ContextOps ops = {
 349         psi_jit_init,
 350         psi_jit_dtor,
 351         psi_jit_compile,
 352         psi_jit_call,
 353 };
 354
 355 PSI_ContextOps *PSI_Libjit(void)
 356 {
 357         return &ops;
 358 }
 359
 360 #endif /* HAVE_LIBJIT */