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