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