pike.git/src/program.c:491b6d4815a6a709e86f7eca7df4f712c3c70ca2

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10184 10185 10186 10187 10188 10189 10190 10191 10192 10193 10194 10195 10196 10197 10198 10199 10200 10201 10202 10203 10204 10205 10206 10207 10208 10209 10210 10211 10212 10213 10214 10215 10216 10217 10218 10219 10220 10221 10222 10223 10224 10225 10226 10227 10228 10229 10230 10231 10232 10233 10234 10235 10236 10237 10238 10239 10240 10241 10242 10243 10244 10245 10246 10247 10248 10249 10250 10251 10252 10253 10254 10255 10256 10257 10258 10259 10260 10261 10262 10263 10264 10265 10266 10267 /* || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. */ #include "global.h" #include "program.h" #include "object.h" #include "buffer.h" #include "pike_types.h" #include "stralloc.h" #include "las.h" #include "lex.h" #include "pike_macros.h" #include "fsort.h" #include "pike_error.h" #include "docode.h" #include "interpret.h" #include "main.h" #include "pike_memory.h" #include "gc.h" #include "threads.h" #include "constants.h" #include "operators.h" #include "builtin_functions.h" #include "mapping.h" #include "cyclic.h" #include "opcodes.h" #include "version.h" #include "block_allocator.h" #include "block_alloc.h" #include "pikecode.h" #include "pike_compiler.h" #include "module_support.h" #include "bitvector.h" #include "sprintf.h" #include <errno.h> #include <fcntl.h> static void exit_program_struct(struct program *); static size_t add_xstorage(size_t size, size_t alignment, ptrdiff_t modulo_orig); /* mapping(int:string) */ static struct mapping *reverse_symbol_table = NULL; static struct block_allocator program_allocator = BA_INIT_PAGES(sizeof(struct program), 4); ATTRIBUTE((malloc)) struct program * alloc_program(void) { return ba_alloc(&program_allocator); } void really_free_program(struct program * p) { exit_program_struct(p); ba_free(&program_allocator, p); } void count_memory_in_programs(size_t *num, size_t *_size) { size_t size; struct program *p; ba_count_all(&program_allocator, num, &size); for(p=first_program;p;p=p->next) { size+=p->total_size - sizeof (struct program); } *_size = size; } void free_all_program_blocks(void) { ba_destroy(&program_allocator); } /* #define COMPILER_DEBUG */ /* #define PROGRAM_BUILD_DEBUG */ #ifdef COMPILER_DEBUG #define CDFPRINTF(...) fprintf(stderr, __VA_ARGS__) #ifndef PIKE_THREADS /* The CDFPRINTF lines wants to print lock_depth, so fake one of those */ static const int lock_depth = 1; #endif #else /* !COMPILER_DEBUG */ #define CDFPRINTF(...) #endif /* COMPILER_DEBUG */ /* * These two values should probably be fine-tuned, but doing so * more or less requires running a predictable 'typical' application * and testing different hashsizes and tresholds. I tried to do it * mathematically by measuring the extremes (no cache hits, 100% * cache hits etc.) but it seems that the processor cache becomes * exhausted in some of my measurements, which renders my mathematical * model useless. * * Further measurements seems to indicate that this cache can slow * things down a bit if the hit/miss rate is not fairly high. * For normal applications, the hitrate is most likely well over 90%, * but that should be verified. * - Hubbe */ /* Define the size of the cache that is used for method lookup. */ /* A value of zero disables this cache */ #define FIND_FUNCTION_HASHSIZE 16384 /* Programs with less methods will not use the cache for method lookups.. */ #define FIND_FUNCTION_HASH_TRESHOLD 0 #define DECLARE #include "compilation.h" struct pike_string *this_program_string, *this_string, *args_string; static struct pike_string *this_function_string; static struct pike_string *UNDEFINED_string; /* Common compiler subsystems */ struct pike_string *parser_system_string; struct pike_string *type_check_system_string; struct pike_string *compat_lfun_destroy_string; /* NOTE: There is a corresponding list to this one in Tools.AutoDoc.PikeObjects If new lfuns are added it might be beneficial to also add them to that list. */ const char *const lfun_names[] = { "__INIT", "create", "_destruct", "`+", "`-", "`&", "`|", "`^", "`<<", "`>>", "`*", "`/", "`%", "`~", "`==", "`<", "`>", "__hash", "cast", "`!", "`[]", "`[]=", "`->", "`->=", "_sizeof", "_indices", "_values", "`()", "``+", "``-", "``&", "``|", "``^", "``<<", "``>>", "``*", "``/", "``%", "`+=", "_is_type", "_sprintf", "_equal", "_m_delete", "_get_iterator", "`[..]", /* NOTE: After this point there are only fake lfuns. */ "_search", "_types", "_serialize", "_deserialize", "_size_object", "_random", "`**", "``**", "_sqrt", "_annotations", }; struct pike_string *lfun_strings[NELEM(lfun_names)]; static struct mapping *lfun_ids; /* mapping(string:type) */ static struct mapping *lfun_types; static const char *const raw_lfun_types[] = { tFuncV(tNone,tVoid,tVoid), /* "__INIT", */ tFuncV(tNone,tZero,tVoid), /* "create", */ tFuncV(tOr(tVoid,tInt),tVoid,tVoid), /* "_destruct", */ tFuncV(tZero,tZero,tMix), /* "`+", */ tFunc(tOr(tVoid,tZero),tMix), /* "`-", */ tFuncV(tNone,tZero,tMix), /* "`&", */ tFuncV(tNone,tZero,tMix), /* "`|", */ tFuncV(tNone,tZero,tMix), /* "`^", */ tFuncV(tZero,tVoid,tMix), /* "`<<", */ tFuncV(tZero,tVoid,tMix), /* "`>>", */ tFuncV(tNone,tZero,tMix), /* "`*", */ tFuncV(tNone,tZero,tMix), /* "`/", */ tFuncV(tNone,tZero,tMix), /* "`%", */ tFuncV(tNone,tVoid,tMix), /* "`~", */ tFuncV(tMix,tVoid,tInt), /* "`==", */ tFuncV(tMix,tVoid,tInt), /* "`<", */ tFuncV(tMix,tVoid,tInt), /* "`>", */ tFuncV(tNone,tVoid,tInt), /* "__hash", */ tFuncV(tString,tVoid,tMix), /* "cast", */ tFuncV(tNone,tVoid,tInt), /* "`!", */ tFuncV(tZero,tVoid,tMix), /* "`[]", */ tFuncV(tZero tSetvar(0,tZero),tVoid,tVar(0)), /* "`[]=", */ tFuncV(tStr tOr(tVoid,tObj) tOr(tVoid,tInt),tVoid,tMix), /* "`->", */ tFuncV(tStr tSetvar(0,tZero) tOr(tVoid,tObj) tOr(tVoid,tInt),tVoid,tVar(0)), /* "`->=", */ tFuncV(tOr(tVoid,tObj) tOr(tVoid,tInt),tVoid,tInt), /* "_sizeof", */ tFuncV(tOr(tVoid,tObj) tOr(tVoid,tInt),tVoid,tArray), /* "_indices", */ tFuncV(tOr(tVoid,tObj) tOr(tVoid,tInt),tVoid,tArray), /* "_values", */ tFuncV(tNone,tZero,tMix), /* "`()", */ tFuncV(tZero,tZero,tMix), /* "``+", */ tFuncV(tZero,tVoid,tMix), /* "``-", */ tFuncV(tNone,tZero,tMix), /* "``&", */ tFuncV(tNone,tZero,tMix), /* "``|", */ tFuncV(tNone,tZero,tMix), /* "``^", */ tFuncV(tZero,tVoid,tMix), /* "``<<", */ tFuncV(tZero,tVoid,tMix), /* "``>>", */ tFuncV(tNone,tZero,tMix), /* "``*", */ tFuncV(tNone,tZero,tMix), /* "``/", */ tFuncV(tNone,tZero,tMix), /* "``%", */ tFuncV(tZero,tZero,tMix), /* "`+=", */ tFuncV(tStr,tVoid,tInt), /* "_is_type", */ tFuncV(tInt tOr(tMap(tStr,tInt),tVoid),tVoid,tStr), /* "_sprintf", */ tFuncV(tMix,tVoid,tInt), /* "_equal", */ tFuncV(tZero,tVoid,tMix), /* "_m_delete", */ tFuncV(tNone,tVoid,tObj), /* "_get_iterator", */ tFuncV(tZero tRangeBound tZero tRangeBound, tVoid, tMix), /* "`[..]" */ /* NOTE: After this point there are only fake lfuns. */ tFuncV(tZero tOr(tZero, tVoid), tZero, tMix), /* "_search", */ tFuncV(tNone,tVoid,tArray), /* "_types", */ tFuncV(tObj tZero, tVoid, tVoid), /* "_serialize", */ tFuncV(tObj tZero, tVoid, tVoid), /* "_deserialize", */ tFuncV(tNone, tVoid, tInt), /* "_size_object", */ tFuncV(tFunction tFunction, tVoid, tMix), /* "_random", */ tFuncV(tOr3(tInt,tFloat,tObj),tVoid,tOr3(tObj,tInt,tFloat)), /* "pow", */ tFuncV(tOr3(tInt,tFloat,tObj),tVoid,tOr3(tObj,tInt,tFloat)), /* "rpow", */ tFunc(tVoid,tMix), /* "_sqrt", */ tFuncV(tNone,tVoid,tArray), /* "_annotations", */ }; /* These two are not true LFUNs! */ static struct pike_type *lfun_getter_type_string = NULL; static struct pike_type *lfun_setter_type_string = NULL; /*! @namespace lfun:: *! *! Callback functions used to overload various builtin functions. *! *! The functions can be grouped into a few sets: *! *! @ul *! @item *! Object initialization and destruction. *! *! @[__INIT()], @[create()], @[_destruct()] *! *! @item *! Unary operator overloading. *! *! @[`~()], @[`!()], *! @[_values()], @[cast()], *! @[_sizeof()], @[_indices()], *! @[__hash()] *! *! @item *! Binary asymmetric operator overloading. *! *! @[`+()], @[``+()], *! @[`-()], @[``-()], *! @[`&()], @[``&()], *! @[`|()], @[``|()], *! @[`^()], @[``^()], *! @[`<<()], @[``<<()], *! @[`>>()], @[``>>()], *! @[`*()], @[``*()], *! @[`/()], @[``/()], *! @[`%()], @[``%()] *! *! @item *! Binary symmetric operator overloading. *! *! The optimizer will make assumptions about the relations *! between these functions. *! *! @[`==()], @[_equal()], @[`<()], @[`>()] *! *! @item *! Other binary operator overloading. *! *! @[`[]()], @[`[]=()], @[`->()], *! @[`->=()], @[`+=()], @[`()()] *! *! @item *! Overloading of other builtin functions. *! *! @[_is_type()], @[_sprintf()], @[_m_delete()], *! @[_get_iterator()], @[_search()] *! @endul *! *! @note *! Although these functions are called from outside the object they *! exist in, they will still be used even if they are declared *! @expr{protected@}. It is in fact recommended to declare them *! @expr{protected@}, since that will hinder them being used for *! other purposes. *! *! @seealso *! @[::] */ /*! @decl void lfun::__INIT() *! *! Inherit and variable initialization. *! *! This function is generated automatically by the compiler. It's *! called just before @[lfun::create()] when an object is *! instantiated. *! *! It first calls any @expr{__INIT@} functions in inherited classes *! (regardless of modifiers on the inherits). It then executes all *! the variable initialization expressions in this class, in the *! order they occur. *! *! @note *! This function can not be overloaded or blocked from executing. *! *! @seealso *! @[lfun::create()] */ /*! @decl void lfun::create(zero ... args) *! *! Object creation callback. *! *! This function is called right after @[lfun::__INIT()]. *! *! @[args] are the arguments passed when the program was called. *! *! @note *! This function can be created implicitly *! by the compiler using the syntax: *! @code *! class Foo(int foo) { *! int bar; *! } *! @endcode *! In the above case an implicit @[lfun::create()] is created, and *! it's equivalent to: *! @code *! class Foo { *! int foo; *! int bar; *! protected void create(int foo) *! { *! this::foo = foo; *! } *! } *! @endcode *! *! @seealso *! @[lfun::__INIT()], @[lfun::_destruct()] */ /*! @decl void lfun::_destruct (void|int reason) *! *! Object destruction callback. *! *! This function is called right before the object is destructed. *! That can happen either through a call to @[predef::destruct()], *! when there are no more references to the object, or when the *! garbage collector discovers that it's part of a cyclic data *! structure that has become garbage. *! *! @param reason *! A flag that tells why the object is destructed: *! *! @int *! @value Object.DESTRUCT_EXPLICIT *! Destructed explicitly by @[predef::destruct]. *! @value Object.DESTRUCT_NO_REFS *! Destructed due to running out of references. *! @value Object.DESTRUCT_GC *! Destructed by the garbage collector. *! @value Object.DESTRUCT_CLEANUP *! Destructed as part of the cleanup when the pike process *! exits. Occurs only if Pike has been compiled with the *! configure option @tt{--with-cleanup-on-exit@}. See note *! below. *! @endint *! *! @note *! Objects are normally not destructed when a process exits, so *! @expr{_destruct@} functions aren't called then. Use @[atexit] to get *! called when the process exits. *! *! @note *! Regarding destruction order during garbage collection: *! *! If an object is destructed by the garbage collector, it's part of *! a reference cycle with other things but with no external *! references. If there are other objects with @expr{_destruct@} *! functions in the same cycle, it becomes a problem which to call *! first. *! *! E.g. if this object has a variable with another object which *! (directly or indirectly) points back to this one, you might find *! that the other object already has been destructed and the variable *! thus contains zero. *! *! The garbage collector tries to minimize such problems by defining *! an order as far as possible: *! *! @ul *! @item *! If an object A contains an @[lfun::_destruct] and an object B does *! not, then A is destructed before B. *! @item *! If A references B single way, then A is destructed before B. *! @item *! If A and B are in a cycle, and there is a reference somewhere *! from B to A that is weaker than any reference from A to B, then *! A is destructed before B. *! @item *! If a cycle is resolved according to the rule above by ignoring a *! weaker reference, and there is another ambiguous cycle that *! would get resolved by ignoring the same reference, then the *! latter cycle will be resolved by ignoring that reference. *! @item *! Weak references (e.g. set with @[predef::set_weak_flag()]) are *! considered weaker than normal references, and both are *! considered weaker than strong references. *! @item *! Strong references are those from objects to the objects of their *! lexically surrounding classes. There can never be a cycle *! consisting only of strong references. (This means the gc never *! destructs a parent object before all children have been *! destructed.) *! @endul *! *! An example with well defined destruct order due to strong *! references: *! *! @code *! class Super { *! class Sub { *! protected void _destruct() { *! if (!Super::this) *! error ("My parent has been destructed!\n"); *! } *! } *! Sub sub = Sub(); *! protected void _destruct() { *! if (!sub) *! werror ("sub already destructed.\n"); *! } *! } *! @endcode *! *! The garbage collector ensures that these objects are destructed in *! an order so that @expr{werror@} in @expr{Super@} is called and not *! @expr{error@} in @expr{Sub@}. *! *! @note *! When the garbage collector calls @[lfun::_destruct], all accessible *! non-objects and objects without @expr{_destruct@} functions are *! still intact. They are not freed if the @expr{_destruct@} function *! adds external references to them. However, all objects with *! @[lfun::_destruct] in the cycle are already scheduled for *! destruction and will therefore be destroyed even if external *! references are added to them. *! *! @seealso *! @[lfun::create()], @[predef::destruct()] */ /*! @decl mixed lfun::`+(zero arg, zero ... rest) *! *! Left side addition/concatenation callback. *! *! This is used by @[predef::`+]. It's called with any arguments *! that follow this object in the argument list of the call to *! @[predef::`+]. The returned value should be a new instance that *! represents the addition/concatenation between this object and *! the arguments in the order they are given. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``+()], @[lfun::`+=()], @[predef::`+()] */ /*! @decl this_program lfun::`+=(zero arg, zero ... rest) *! *! Destructive addition/concatenation callback. *! *! This is used by @[predef::`+]. It's called with any arguments *! that follow this object in the argument list of the call to *! @[predef::`+]. It should update this object to represent the *! addition/concatenation between it and the arguments in the order *! they are given. It should always return this object. *! *! @note *! This function should only be implemented if @[lfun::`+()] also *! is. It should only work as a more optimized alternative to that *! one, for the case when it's safe to change the object *! destructively and use it directly as the result. *! *! @note *! This function is not an lfun for the @expr{+=@} operator. It's *! only whether or not it's safe to do a destructive change that *! decides if this function or @[lfun::`+()] is called; both the *! @expr{+@} operator and the @expr{+=@} operator can call either *! one. *! *! @seealso *! @[lfun::`+()], @[predef::`+()] */ /*! @decl mixed lfun::``+(zero arg, zero ... rest) *! *! Right side addition/concatenation callback. *! *! This is used by @[predef::`+]. It's called with any arguments *! that precede this object in the argument list of the call to *! @[predef::`+]. The returned value should be a new instance that *! represents the addition/concatenation between the arguments in *! the order they are given and this object. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`+()], @[predef::`+()] */ /*! @decl mixed lfun::`-(void|zero arg) *! *! Negation and left side subtraction/set difference callback. *! *! This is used by @[predef::`-]. When called without an argument *! the result should be a new instance that represents the negation *! of this object, otherwise the result should be a new instance *! that represents the difference between this object and @[arg]. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``-()], @[predef::`-()] */ /*! @decl mixed lfun::``-(zero arg) *! *! Right side subtraction/set difference callback. *! *! This is used by @[predef::`-]. The result should be a new *! instance that represents the difference between @[arg] and this *! object. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`-()], @[predef::`-()] */ /*! @decl mixed lfun::`&(zero ... args) *! *! Left side bitwise and/intersection callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``&()], @[predef::`&()] */ /*! @decl mixed lfun::``&(zero ... args) *! *! Right side bitwise and/intersection callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`&()], @[predef::`&()] */ /*! @decl mixed lfun::`|(zero ... args) *! *! Left side bitwise or/union callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``|()], @[predef::`|()] */ /*! @decl mixed lfun::``|(zero ... args) *! *! Right side bitwise or/union callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`|()], @[predef::`|()] */ /*! @decl mixed lfun::`^(zero ... args) *! *! Left side exclusive or callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``^()], @[predef::`^()] */ /*! @decl mixed lfun::``^(zero ... args) *! *! Right side exclusive or callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`^()], @[predef::`^()] */ /*! @decl mixed lfun::`<<(zero arg) *! *! Left side left shift callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``<<()], @[predef::`<<()] */ /*! @decl mixed lfun::``<<(zero arg) *! *! Right side left shift callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`<<()], @[predef::`<<()] */ /*! @decl mixed lfun::`>>(zero arg) *! *! Left side right shift callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``>>()], @[predef::`>>()] */ /*! @decl mixed lfun::``>>(zero arg) *! *! Right side right shift callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`>>()], @[predef::`>>()] */ /*! @decl mixed lfun::`*(zero ... args) *! *! Left side multiplication/repetition/implosion callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``*()], @[predef::`*()] */ /*! @decl mixed lfun::``*(zero ... args) *! *! Right side multiplication/repetition/implosion callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`*()], @[predef::`*()] */ /*! @decl mixed lfun::`/(zero ... args) *! *! Left side division/split callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``/()], @[predef::`/()] */ /*! @decl mixed lfun::``/(zero ... args) *! *! Right side division/split callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`/()], @[predef::`/()] */ /*! @decl mixed lfun::`%(zero ... args) *! *! Left side modulo callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::``%()], @[predef::`%()] */ /*! @decl mixed lfun::``%(zero ... args) *! *! Right side modulo callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`%()], @[predef::`%()] */ /*! @decl int lfun::`!() *! *! Logical not callback. *! *! @returns *! Returns non-zero if the object should be evaluated as false, *! and @expr{0@} (zero) otherwise. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`!()] */ /*! @decl mixed lfun::`~() *! *! Complement/inversion callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`~()] */ /*! @decl int(0..1) lfun::`==(mixed arg) *! *! Equivalence test callback. *! *! @returns *! Is expected to return @expr{1@} if the current object is *! equivalent to @[arg] (ie may be replaced with @[arg], with *! no semantic differences (disregarding the effects of @[destruct()])), *! and @expr{0@} (zero) otherwise. *! *! @note *! If this is implemented it may be necessary to implement *! @[lfun::__hash] too. Otherwise mappings may hold several *! objects as indices which are duplicates according to this *! function. This may also affect various other functions *! that use hashing internally, e.g. @[predef::Array.uniq]. *! *! @note *! It's assumed that this function is side-effect free. *! *! @note *! It's recommended to only implement this function for *! immutable objects, as otherwise stuff may get confusing *! when things that once were equivalent no longer are so, *! or the reverse. *! *! @seealso *! @[predef::`==()], @[lfun::__hash] */ /*! @decl int(0..1) lfun::`<(mixed arg) *! *! Less than test callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`<()] */ /*! @decl int(0..1) lfun::`>(mixed arg) *! *! Greater than test callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`>()] */ /*! @decl int lfun::__hash() *! *! Hashing callback. *! *! The main caller of this function is @[predef::hash_value()] *! or the low-level equivalent, which get called by various *! mapping operations when the object is used as index in a mapping. *! *! @returns *! It should return an integer that corresponds to the object *! in such a way that all values which @[lfun::`==] considers *! equal to the object get the same hash value. *! *! @note *! The function @[predef::hash] does not return hash values that *! are compatible with this one. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[lfun::`==], @[predef::hash_value()] */ /*! @decl mixed lfun::cast(string requested_type) *! *! Value cast callback. *! *! @param requested_type *! Type to cast to. *! *! @returns *! Expected to return the object value-casted (converted) to *! the type described by @[requested_type]. *! *! @note *! The argument is currently a string with the name *! of the type, but might in the future be a value of the type type. *! *! @note *! Currently casting between object types is a noop. *! *! @note *! If the returned value is not deemed to be of the requested type *! a runtime error may be thrown. *! *! @note *! It's assumed that this function is side-effect free. */ /*! @decl mixed lfun::`[](zero arg1, zero|void arg2) *! *! Indexing callback. *! *! For compatibility, this is also called to do subranges unless *! there is a @[`[..]] in the class. See @[predef::`[..]] for *! details. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`[]()], @[predef::`[..]] */ /*! @decl void lfun::`[]=(zero index, zero value, @ *! object|void context, int|void access) *! *! Index assignment callback. *! *! @param index *! Index to change the value of. *! *! @param value *! The new value. *! *! @param context *! Context in the current object to index. *! *! If @expr{UNDEFINED@} or left out, @expr{this_program::this@} *! is to be used (ie start at the current context and ignore *! any overloaded symbols). *! *! @param access *! Access permission override. One of the following: *! @int *! @value 0 *! @value UNDEFINED *! See only public symbols. *! @value 1 *! See protected symbols as well. *! @endint *! *! This function is to set the value at index @[index] of the current *! object to @[value]. *! *! @seealso *! @[predef::`[]=()], @[lfun::`->=()] */ /*! @decl mixed lfun::`->(string index, object|void context, int|void access) *! *! Arrow index callback. *! *! @param index *! Symbol in @[context] to access. *! *! @param context *! Context in the current object to start the search from. *! If @expr{UNDEFINED@} or left out, @expr{this_program::this@} *! is to be be used (ie start at the current context and ignore *! any overloaded symbols). *! *! @param access *! Access permission override. One of the following: *! @int *! @value 0 *! @value UNDEFINED *! See only public symbols. *! @value 1 *! See protected symbols as well. *! @endint *! *! @returns *! Returns the value at @[index] if it exists, and *! @expr{UNDEFINED@} otherwise. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`->()], @[::`->()] */ /*! @decl void lfun::`->=(string index, zero value, @ *! object|void context, int|void access) *! *! Arrow index assignment callback. *! *! @param index *! Symbol in @[context] to change the value of. *! *! @param value *! The new value. *! *! @param context *! Context in the current object to index. *! *! If @expr{UNDEFINED@} or left out, @expr{this_program::this@} *! is to be used (ie start at the current context and ignore *! any overloaded symbols). *! *! @param access *! Access permission override. One of the following: *! @int *! @value 0 *! @value UNDEFINED *! See only public symbols. *! @value 1 *! See protected symbols as well. *! @endint *! *! This function is to set the value at symbol @[index] of the current *! object to @[value]. *! *! @seealso *! @[predef::`->=()], @[::`->=()], @[lfun::`[]=()] */ /*! @decl int lfun::_sizeof() *! *! Size query callback. *! *! Called by @[predef::sizeof()] to determine the number of elements *! in an object. If this function is not present, the number *! of public symbols in the object will be returned. *! *! @returns *! Expected to return the number of valid indices in the object. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::sizeof()] */ /*! @decl array lfun::_indices(object|void context, int|void access) *! *! List indices callback. *! *! @returns *! Expected to return an array with the valid indices in the object. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::indices()], @[lfun::_values()], @[lfun::_types()], *! @[::_indices()] */ /*! @decl array lfun::_values(object|void context, int|void access) *! *! List values callback. *! *! @returns *! Expected to return an array with the values corresponding to *! the indices returned by @[lfun::_indices()]. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::values()], @[lfun::_indices()], @[lfun::_types()], *! @[::_values()] */ /*! @decl mixed lfun::`()(zero ... args) *! *! Apply callback. *! *! @seealso *! @[predef::`()] */ /*! @decl int(0..1) lfun::_is_type(string basic_type) *! *! Type comparison callback. *! *! Called by the cast operator to determine if an object *! simulates a basic type. *! *! @param basic_type *! One of: *! @string *! @value "array" *! @value "float" *! @value "function" *! @value "int" *! @value "mapping" *! @value "multiset" *! @value "object" *! @value "program" *! @value "string" *! @value "type" *! @value "void" *! @value "zero" *! @endstring *! *! The following five shouldn't occurr, but are here for completeness: *! @string *! @value "lvalue" *! @value "mapping_data" *! @value "object storage" *! @value "pike_frame" *! @value "unknown" *! @endstring *! *! @returns *! Expected to return @expr{1@} if the object is to be regarded as a *! simulation of the type specified by @[basic_type]. *! *! @note *! The argument is currently a string with the name *! of the type, but might in the future be a value of the type type. *! *! @note *! It's assumed that this function is side-effect free. */ /*! @decl string lfun::_sprintf(int conversion_type, @ *! mapping(string:int)|void params) *! *! Sprintf callback. *! *! This method is called by @[predef::sprintf()] to print objects. If it is *! not present, printing of the object will not be supported for any *! conversion-type except for the @tt{%O@}-conversion-type, which *! will output @expr{"object"@}. *! *! @param conversion_type *! One of: *! @int *! @value 'b' *! Signed binary integer. *! @value 'd' *! Signed decimal integer. *! @value 'u' *! Unsigned decimal integer. *! @value 'o' *! Signed octal integer. *! @value 'x' *! Lowercase signed hexadecimal integer. *! @value 'X' *! Uppercase signed hexadecimal integer. *! @value 'c' *! Character. If a fieldsize has been specified this will output *! the low-order bytes of the integer in network byte order. *! @value 'f' *! Float. *! @value 'g' *! Heuristically chosen representation of float. *! @value 'G' *! Like @tt{%g@}, but uses uppercase @tt{E@} for exponent. *! @value 'e' *! Exponential notation float. *! @value 'E' *! Like @tt{%e@}, but uses uppercase @tt{E@} for exponent. *! @value 's' *! String. *! @value 'O' *! Any value (debug style). *! @value 't' *! Type of the argument. *! @endint *! *! @param params *! Conversion parameters. The following parameters may be supplied: *! @mapping *! @member int "precision" *! Precision. *! @member int "width" *! Field width. *! @member int(1..1) "flag_left" *! Indicates that the output should be left-aligned. *! @member int "indent" *! Indentation level in @tt{%O@}-mode. *! @endmapping *! *! @returns *! Is expected to return a string describing the object formatted *! according to @[conversion_type]. *! *! @note *! @[_sprintf()] is currently not called for the following *! conversion-types: *! @int *! @value 'F' *! Binary IEEE representation of float (@tt{%4F@} gives *! single precision, @tt{%8F@} gives double precision.) *! @endint *! *! @note *! This function might be called at odd times, e.g. before *! @[lfun::create] has been called or when an error has occurred. *! The reason is typically that it gets called when a backtrace is *! being formatted to report an error. It should therefore be very *! robust and not make any assumptions about its own internal *! state, at least not when @[conversion_type] is @expr{'O'@}. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::sprintf()] */ /*! @decl int lfun::_equal(mixed arg) *! *! Recursive equality callback. *! *! @returns *! Is expected to return @expr{1@} if the current object is *! equal to @[arg], and @expr{0@} (zero) otherwise. *! *! @note *! It's assumed that this function is side-effect free. *! *! @note *! Note that this function may return different values at different *! times for the same argument due to the mutability of the object. *! *! @seealso *! @[predef::equal()], @[lfun::`==()] */ /*! @decl mixed lfun::_m_delete(mixed arg) *! *! Delete index callback. *! *! @seealso *! @[predef::m_delete()] */ /*! @decl predef::Iterator lfun::_get_iterator() *! *! Iterator creation callback. *! *! The returned @[predef::Iterator] instance works as a cursor that *! references a specific item contained (in some arbitrary sense) *! in this one. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::Iterator], @[predef::get_iterator], @[predef::foreach()] */ /*! @decl mixed lfun::`[..](zero low, int low_bound_type, @ *! zero high, int high_bound_type) *! *! Subrange callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`[..]] */ /**** END TRUE LFUNS ****/ /**** BEGIN FAKE LFUNS ****/ /*! @decl mixed lfun::_search(mixed needle, mixed|void start, @ *! mixed ... extra_args) *! *! Search callback. *! *! The arguments are sent straight from @[search()], and are *! as follows: *! *! @param needle *! Value to search for. *! *! @param start *! The first position to search. *! *! @param extra_args *! Optional extra arguments as passed to @[search()]. *! *! @seealso *! @[predef::search()] */ /*! @decl array lfun::_types(object|void context, int|void access) *! *! List types callback. *! *! This callback is typically called via @[predef::types()]. *! *! @returns *! Expected to return an array with the types corresponding to *! the indices returned by @[lfun::_indices()]. *! *! @note *! It's assumed that this function is side-effect free. *! *! @note *! @[predef::types()] was added in Pike 7.9. *! *! @seealso *! @[predef::types()], @[lfun::_indices()], @[lfun::_values()], *! @[::_types()] */ /*! @decl void lfun::_serialize(object o, @ *! function(mixed, string, type:void) serializer) *! *! Dispatch function for @[Serializer.serialize()]. *! *! @param o *! Object to serialize. Always a context of the current object. *! *! @param serializer *! Function to be called once for every variable *! to serialize. *! *! The @[serializer] function expects to be called with three arguments: *! @dl *! @item *! @tt{value@} - The value of the symbol. *! @item *! @tt{symbol@} - The symbol name. *! @item *! @tt{symbol_type@} - The type of the symbol. *! @enddl *! *! @note *! A default implementation of @[lfun::_serialize()] and *! @[lfun::_deserialize()] is available in @[Serializer.Serializable]. *! *! @seealso *! @[lfun::_deserialize()], @[Serializer.serialize()], *! @[Serializer.Serializable()->_serialize()] */ /*! @decl void lfun::_deserialize(object o, @ *! function(function(mixed:void), @ *! string, type: mixed) deserializer) *! *! Dispatch function for @[Serialization.deserialize()]. *! *! @param o *! Object to serialize. Always a context of the current object. *! *! @param deserializer *! Function to be called once for every variable *! to serialize. *! *! The @[deserializer] function expects to be called with three arguments: *! @dl *! @item *! @tt{setter@} - Function that sets the symbol value. *! @item *! @tt{symbol@} - The symbol name. *! @item *! @tt{symbol_type@} - The type of the symbol. *! @enddl *! *! @note *! A default implementation of @[lfun::_serialize()] and *! @[lfun::_deserialize()] is available in @[Serializer.Serializable]. *! *! @seealso *! @[lfun::_serialize()], @[Serializer.deserialize()], *! @[Serializer.Serializable()->_deserialize()] */ /*! @decl int lfun::_size_object() *! *! @[Debug.size_object()] callback. *! *! @returns *! Returns an approximation of the memory use in bytes for the object. *! *! @seealso *! @[Debug.size_object()], @[lfun::_sizeof()] */ /*! @decl mixed lfun::_random(function(int(0..):string(8bit)) random_string, @ *! function(mixed:mixed) random) *! Called by @[random()]. Typical use is when the object implements *! a ADT, when a call to this lfun should return a random member of *! the ADT or range implied by the ADT. *! *! @param random_string *! A @[RandomInterface()->random_string] function that returns *! a string(8bit) of the specified length. *! *! @param random *! A @[RandomInterface()->random] function. *! *! @seealso *! @[predef::random()], @[RandomInterface] */ /**** END FAKE LFUNS ****/ /**** BEGIN MAGIC LFUNS ****/ /*! @decl mixed lfun::`symbol() *! @decl mixed lfun::`->symbol() *! *! Variable retrieval callback (aka "getter"). *! *! @note *! Note that the @expr{symbol@} in the name can be any symbol. *! *! @note *! This is not a true LFUN, since it is even more low level! *! *! @note *! This function WILL be called even by inheriting programs *! when they attempt to access the variable named @expr{symbol@}. *! *! @seealso *! @[lfun::`->symbol=()], @[lfun::`->()] */ /*! @decl void lfun::`symbol=(zero value) *! @decl void lfun::`->symbol=(zero value) *! *! Variable assignment callback (aka "setter"). *! *! @note *! Note that the @expr{symbol@} in the name can be any symbol. *! *! @note *! This is not a true LFUN, since it is even more low level! *! *! @note *! This function WILL be called even by inheriting programs *! when they attempt to set the variable named @expr{symbol@}. *! *! @seealso *! @[lfun::`->symbol()], @[lfun::`->=()] */ /*! @endnamespace */ /*! @class MasterObject */ /*! @decl void unregister(program p) *! *! Unregister a program that was only partially compiled. *! *! Called by @[compile()] to clean up references to partially compiled *! programs. *! *! @param p *! Partially compiled program that should no longer be referenced. *! *! @fixme *! Shouldn't this function be in the compilation handler? */ /*! @endclass */ /*! @class CompilationHandler */ /*! @decl mapping(string:mixed)|object get_default_module() *! *! Returns the default module from which global symbols will *! be fetched. *! *! @returns *! Returns the default module, or @expr{0@} (zero). *! *! If @expr{0@} (zero) is returned the compiler use the mapping *! returned by @[all_constants()] as fallback. *! *! @seealso *! @[get_predefines()] */ /*! @decl void compile_warning(string filename, int line, string msg) *! *! Called by @[compile()] to report warnings. *! *! @param filename *! File which triggered the warning. *! *! @param line *! Line which triggered the warning. *! *! @param msg *! Warning message. *! *! @seealso *! @[compile_error()] */ /*! @endclass */ struct program *first_program = 0; static int current_program_id = PROG_DYNAMIC_ID_START; struct program *gc_internal_program = 0; static struct program *gc_mark_program_pos = 0; #define CHECK_FILE_ENTRY(PROG, STRNO) \ do { \ if ((STRNO < 0) || (STRNO >= PROG->num_strings)) \ Pike_fatal ("Invalid file entry in linenumber info.\n"); \ } while (0) INT_TYPE get_small_number(char **q); PMOD_EXPORT void do_free_program (struct program *p) { if (p) free_program(p); } /* So what if we don't have templates? / Hubbe */ #ifdef PIKE_DEBUG #define CHECK_FOO(NUMTYPE,TYPE,NAME) \ if(Pike_compiler->malloc_size_program-> PIKE_CONCAT(num_,NAME) < \ Pike_compiler->new_program-> PIKE_CONCAT(num_,NAME)) \ Pike_fatal("Pike_compiler->new_program->num_" #NAME " is out of order\n");\ if(Pike_compiler->new_program->flags & PROGRAM_OPTIMIZED) \ Pike_fatal("Tried to reallocate fixed program.\n") #else #define CHECK_FOO(NUMTYPE,TYPE,NAME) #endif #ifndef RELOCATE_program #define RELOCATE_program(ORIG, NEW) #endif /* !RELOCATE_program */ #define RELOCATE_identifier_cache(ORIG,NEW) #define RELOCATE_linenumbers(ORIG,NEW) #define RELOCATE_identifier_index(ORIG,NEW) #define RELOCATE_variable_index(ORIG,NEW) #define RELOCATE_identifier_references(ORIG,NEW) #define RELOCATE_strings(ORIG,NEW) #define RELOCATE_inherits(ORIG,NEW) #define RELOCATE_identifiers(ORIG,NEW) #define RELOCATE_annotations(ORIG,NEW) #define RELOCATE_constants(ORIG,NEW) #define RELOCATE_relocations(ORIG,NEW) #if SIZEOF_LONG_LONG == 8 /* we have 8 byte ints, hopefully this constant works on all these systems */ #define MAXVARS(NUMTYPE) \ (NUMTYPE)(sizeof(NUMTYPE)==1?254: \ (sizeof(NUMTYPE)==2?65534: \ (sizeof(NUMTYPE)==4?4294967294U:18446744073709551614ULL))) #else #define MAXVARS(NUMTYPE) \ (NUMTYPE)(sizeof(NUMTYPE)==1?254: (sizeof(NUMTYPE)==2?65534:4294967294U)) #endif #ifdef PIKE_USE_MACHINE_CODE /* Special cases for low_add_to_program and add_to_program since * many OSes require us to use mmap to allocate memory for our * machine code. For decoding efficiency we also want a multi copy * variant to be used by decode(). */ #define BAR(NUMTYPE,TYPE,ARGTYPE,NAME) \ void PIKE_CONCAT(low_add_to_,NAME) (struct program_state *state, \ TYPE ARG) { \ NUMTYPE m = state->malloc_size_program->PIKE_CONCAT(num_,NAME); \ CHECK_FOO(NUMTYPE,TYPE,NAME); \ if(m == state->new_program->PIKE_CONCAT(num_,NAME)) { \ TYPE *tmp; \ if(m==MAXVARS(NUMTYPE)) { \ yyerror("Too many " #NAME "."); \ return; \ } \ m = MINIMUM(m*2+1,MAXVARS(NUMTYPE)); \ tmp = mexec_realloc(state->new_program->NAME, sizeof(TYPE) * m); \ if(!tmp) Pike_fatal("Out of memory.\n"); \ PIKE_CONCAT(RELOCATE_,NAME)(state->new_program, tmp); \ state->malloc_size_program->PIKE_CONCAT(num_,NAME)=m; \ state->new_program->NAME=tmp; \ } \ state->new_program-> \ NAME[state->new_program->PIKE_CONCAT(num_,NAME)++]=(ARG); \ } \ void PIKE_CONCAT(low_add_many_to_,NAME) (struct program_state *state, \ TYPE *ARG, NUMTYPE cnt) { \ NUMTYPE m = state->malloc_size_program->PIKE_CONCAT(num_,NAME); \ CHECK_FOO(NUMTYPE,TYPE,NAME); \ if((m + cnt) > state->new_program->PIKE_CONCAT(num_,NAME)) { \ TYPE *tmp; \ NUMTYPE n = m; \ do { \ if(n==MAXVARS(NUMTYPE)) { \ yyerror("Too many " #NAME "."); \ return; \ } \ n = MINIMUM(n*2+1,MAXVARS(NUMTYPE)); \ } while (m + cnt > n); \ m = n; \ tmp = mexec_realloc(state->new_program->NAME, sizeof(TYPE) * m); \ if(!tmp) Pike_fatal("Out of memory.\n"); \ PIKE_CONCAT(RELOCATE_,NAME)(state->new_program, tmp); \ state->malloc_size_program->PIKE_CONCAT(num_,NAME)=m; \ state->new_program->NAME=tmp; \ } \ memcpy(state->new_program->NAME + \ state->new_program->PIKE_CONCAT(num_,NAME), \ ARG, sizeof(TYPE) * cnt); \ state->new_program->PIKE_CONCAT(num_,NAME) += cnt; \ } \ void PIKE_CONCAT(add_to_,NAME) (ARGTYPE ARG) { \ PIKE_CONCAT(low_add_to_,NAME) ( Pike_compiler, ARG ); \ } #else /* !PIKE_USE_MACHINE_CODE */ #define BAR(NUMTYPE,TYPE,ARGTYPE,NAME) \ FOO(NUMTYPE,TYPE,ARGTYPE,NAME) \ void PIKE_CONCAT(low_add_many_to_,NAME) (struct program_state *state, \ TYPE *ARG, NUMTYPE cnt) { \ NUMTYPE m = state->malloc_size_program->PIKE_CONCAT(num_,NAME); \ CHECK_FOO(NUMTYPE,TYPE,NAME); \ if((m + cnt) > state->new_program->PIKE_CONCAT(num_,NAME)) { \ TYPE *tmp; \ NUMTYPE n = m; \ do { \ if(n==MAXVARS(NUMTYPE)) { \ yyerror("Too many " #NAME "."); \ return; \ } \ n = MINIMUM(n*2+1,MAXVARS(NUMTYPE)); \ } while (m + cnt > n); \ m = n; \ tmp = realloc(state->new_program->NAME, sizeof(TYPE) * m); \ if(!tmp) Pike_fatal("Out of memory.\n"); \ PIKE_CONCAT(RELOCATE_,NAME)(state->new_program, tmp); \ state->malloc_size_program->PIKE_CONCAT(num_,NAME)=m; \ state->new_program->NAME=tmp; \ } \ memcpy(state->new_program->NAME + \ state->new_program->PIKE_CONCAT(num_,NAME), \ ARG, sizeof(TYPE) * cnt); \ state->new_program->PIKE_CONCAT(num_,NAME) += cnt; \ } #endif /* PIKE_USE_MACHINE_CODE */ /* Funny guys use the uppermost value for nonexistant variables and the like. Hence -2 and not -1. Y2K. */ #define FOO(NUMTYPE,TYPE,ARGTYPE,NAME) \ void PIKE_CONCAT(low_add_to_,NAME) (struct program_state *state, \ TYPE ARG) { \ NUMTYPE m = state->malloc_size_program->PIKE_CONCAT(num_,NAME); \ CHECK_FOO(NUMTYPE,TYPE,NAME); \ if(m == state->new_program->PIKE_CONCAT(num_,NAME)) { \ TYPE *tmp; \ if(m==MAXVARS(NUMTYPE)) { \ yyerror("Too many " #NAME "."); \ return; \ } \ m = MINIMUM(m*2+1,MAXVARS(NUMTYPE)); \ tmp = realloc(state->new_program->NAME, sizeof(TYPE) * m); \ if(!tmp) Pike_fatal("Out of memory.\n"); \ PIKE_CONCAT(RELOCATE_,NAME)(state->new_program, tmp); \ state->malloc_size_program->PIKE_CONCAT(num_,NAME)=m; \ state->new_program->NAME=tmp; \ } \ state->new_program-> \ NAME[state->new_program->PIKE_CONCAT(num_,NAME)++]=(ARG); \ } \ void PIKE_CONCAT(add_to_,NAME) (ARGTYPE ARG) { \ PIKE_CONCAT(low_add_to_,NAME) ( Pike_compiler, ARG ); \ } /* Funny guys use the uppermost value for nonexistant variables and the like. Hence -2 and not -1. Y2K. */ #define PASS1ONLY(NUMTYPE,TYPE,ARGTYPE,NAME) \ void PIKE_CONCAT(low_add_to_,NAME) (struct program_state *state, \ TYPE ARG) { \ NUMTYPE m = state->malloc_size_program->PIKE_CONCAT(num_,NAME); \ CHECK_FOO(NUMTYPE,TYPE,NAME); \ DO_IF_DEBUG(if (state->compiler_pass != COMPILER_PASS_FIRST) { \ Pike_fatal("Adding " TOSTR(NAME) " in pass %d.\n", \ state->compiler_pass); \ }); \ if(m == state->new_program->PIKE_CONCAT(num_,NAME)) { \ TYPE *tmp; \ if(m==MAXVARS(NUMTYPE)) { \ yyerror("Too many " #NAME "."); \ return; \ } \ m = MINIMUM(m*2+1,MAXVARS(NUMTYPE)); \ tmp = realloc(state->new_program->NAME, sizeof(TYPE) * m); \ if(!tmp) Pike_fatal("Out of memory.\n"); \ PIKE_CONCAT(RELOCATE_,NAME)(state->new_program, tmp); \ state->malloc_size_program->PIKE_CONCAT(num_,NAME)=m; \ state->new_program->NAME=tmp; \ } \ state->new_program-> \ NAME[state->new_program->PIKE_CONCAT(num_,NAME)++]=(ARG); \ } \ void PIKE_CONCAT(add_to_,NAME) (ARGTYPE ARG) { \ PIKE_CONCAT(low_add_to_,NAME) ( Pike_compiler, ARG ); \ } #include "program_areas.h" #define add_to_program(ARG) do { \ debug_malloc_touch(Pike_compiler->new_program->program); \ add_to_program(ARG); \ } while(0) void ins_int(INT32 i, void (*func)(char tmp)) { int e; unsigned char *p = (unsigned char *)&i; for(e=0;e<(long)sizeof(i);e++) { func(p[e]); } } #if 0 /* This check is not possible to do since the identifier is added * before checking for duplicates in add_constant. */ static void debug_add_to_identifiers (struct identifier id) { if (d_flag) { int i; for (i = 0; i < Pike_compiler->new_program->num_identifiers; i++) if (Pike_compiler->new_program->identifiers[i].name == id.name) { dump_program_tables (Pike_compiler->new_program, 0); Pike_fatal ("Adding identifier twice, old at %s:%d #%d.\n", Pike_compiler->new_program->identifiers[i].filename? Pike_compiler->new_program->identifiers[i].filename:"-", Pike_compiler->new_program->identifiers[i].linenumber, i); } } add_to_identifiers (id); } #else #define debug_add_to_identifiers(ARG) add_to_identifiers(ARG) #endif static int low_add_identifier(struct compilation *c, struct pike_type *type, struct pike_string *name, unsigned int identifier_flags, unsigned int opt_flags, union idptr func, int run_time_type) { struct identifier dummy; int n = Pike_compiler->new_program->num_identifiers; copy_shared_string(dummy.name, name); copy_pike_type(dummy.type, type); dummy.filename_strno = store_prog_string(c->lex.current_file); dummy.linenumber = c->lex.current_line; dummy.identifier_flags = identifier_flags; dummy.run_time_type = run_time_type; dummy.func = func; dummy.opt_flags = opt_flags; #ifdef PROFILING dummy.self_time=0; dummy.num_calls=0; dummy.recur_depth=0; dummy.total_time=0; #endif debug_add_to_identifiers(dummy); if (Pike_compiler->current_annotations) { /* FIXME: What about annotations for eg variant functions? */ compiler_add_annotations(n, Pike_compiler->current_annotations); /* Only annotate a single identifier. */ free_node(Pike_compiler->current_annotations); Pike_compiler->current_annotations = NULL; } return n; } static int add_identifier(struct compilation *c, struct pike_type *type, struct pike_string *name, unsigned int modifier_flags, unsigned int identifier_flags, unsigned int opt_flags, union idptr func, int run_time_type) { struct reference ref; struct identifier dummy; int n; if (modifier_flags & ID_PRIVATE) modifier_flags |= ID_LOCAL|ID_PROTECTED; if (((identifier_flags & (IDENTIFIER_VARIABLE|IDENTIFIER_ALIAS)) == IDENTIFIER_VARIABLE) && (modifier_flags & ID_WEAK)) { identifier_flags |= IDENTIFIER_WEAK; } ref.id_flags = modifier_flags; ref.identifier_offset = low_add_identifier(c, type, name, identifier_flags, opt_flags, func, run_time_type); ref.inherit_offset = 0; ref.run_time_type = PIKE_T_UNKNOWN; if ((identifier_flags & (IDENTIFIER_VARIABLE|IDENTIFIER_ALIAS)) == IDENTIFIER_VARIABLE) { add_to_variable_index(ref.identifier_offset); } n = Pike_compiler->new_program->num_identifier_references; add_to_identifier_references(ref); return n; } void add_relocated_int_to_program(INT32 i) { add_to_relocations(Pike_compiler->new_program->num_program); ins_int(i, (void (*)(char))add_to_program); } void use_module(struct svalue *s) { struct compilation *c = THIS_COMPILATION; if( (1<<TYPEOF(*s)) & (BIT_MAPPING | BIT_OBJECT | BIT_PROGRAM)) { c->num_used_modules++; Pike_compiler->num_used_modules++; assign_svalue_no_free((struct svalue *) buffer_alloc(&c->used_modules, sizeof(struct svalue)), s); if(Pike_compiler->module_index_cache) { free_mapping(Pike_compiler->module_index_cache); Pike_compiler->module_index_cache=0; } if(c->resolve_cache) { free_mapping(c->resolve_cache); c->resolve_cache=0; } }else{ yyerror("Module is neither mapping nor object"); } } void unuse_modules(INT32 howmany) { struct compilation *c = THIS_COMPILATION; struct svalue *s = buffer_dst(&c->used_modules); if(!howmany) return; s -= howmany; #ifdef PIKE_DEBUG if(howmany *sizeof(struct svalue) > buffer_content_length(&c->used_modules)) Pike_fatal("Unusing too many modules.\n"); #endif c->num_used_modules -= howmany; Pike_compiler->num_used_modules-=howmany; free_svalues(s, howmany, BIT_MAPPING | BIT_OBJECT | BIT_PROGRAM); buffer_remove(&c->used_modules, howmany*sizeof(struct svalue)); #ifdef PIKE_DEBUG if (s != buffer_dst(&c->used_modules)) Pike_fatal("buffer_remove is broken.\n"); #endif if(Pike_compiler->module_index_cache) { free_mapping(Pike_compiler->module_index_cache); Pike_compiler->module_index_cache=0; } } static struct node_s *index_modules(struct pike_string *ident, struct mapping **module_index_cache, const int num_used_modules, struct svalue *modules) /* num_used_modules is declared const here to convince the compiler that it is not * modified in between setjmp() and longjmp(). This prevents -Wclobbered warnings. */ { if(*module_index_cache) { struct svalue *tmp=low_mapping_string_lookup(*module_index_cache,ident); if(tmp) { if(!(SAFE_IS_ZERO(tmp) && SUBTYPEOF(*tmp)==1)) return mksvaluenode(tmp); return 0; } } /* fprintf(stderr,"index_module: %s\n",ident->str); */ { JMP_BUF tmp; if(SETJMP(tmp)) handle_compile_exception ("Couldn't index a module with %S.", ident); else { int e = num_used_modules; struct svalue *m = modules - num_used_modules; while(--e>=0) { push_svalue(m+e); ref_push_string(ident); f_index(2); if(!IS_UNDEFINED(Pike_sp-1)) { struct node_s *ret; UNSETJMP(tmp); if (Pike_compiler->compiler_pass == COMPILER_PASS_LAST && ((TYPEOF(Pike_sp[-1]) == T_OBJECT && Pike_sp[-1].u.object == placeholder_object) || (TYPEOF(Pike_sp[-1]) == T_PROGRAM && Pike_sp[-1].u.program == placeholder_program))) { my_yyerror("Got placeholder %s (resolver problem) " "when indexing a module with %S.", get_name_of_type (TYPEOF(Pike_sp[-1])), ident); ret = 0; } else { if(!*module_index_cache) *module_index_cache = allocate_mapping(10); mapping_string_insert(*module_index_cache, ident, Pike_sp-1); ret = mksvaluenode(Pike_sp-1); } pop_stack(); return ret; } pop_stack(); } } UNSETJMP(tmp); } return 0; } struct node_s *resolve_identifier(struct pike_string *ident); struct node_s *find_module_identifier(struct pike_string *ident, int see_inherit) { struct compilation *c = THIS_COMPILATION; struct node_s *ret; struct svalue *modules=(struct svalue *)buffer_dst(&c->used_modules); { struct program_state *p=Pike_compiler; int n; for(n=0;n<=c->compilation_depth;n++,p=p->previous) { int i; if(see_inherit) { i=really_low_find_shared_string_identifier(ident, p->new_program, SEE_PROTECTED|SEE_PRIVATE); if(i!=-1) { if ((p->flags & COMPILATION_FORCE_RESOLVE) && (p->compiler_pass == COMPILER_PASS_LAST) && ((p->num_inherits + 1) < p->new_program->num_inherits) && (PTR_FROM_INT(p->new_program, i)->inherit_offset > p->num_inherits)) { /* Don't look up symbols inherited later, since we need to get * the same symbol in both passes in the force_resolve mode. */ continue; } return p == Pike_compiler ? mkidentifiernode(i) : mkexternalnode(p->new_program, i); } } if((ret=index_modules(ident, &p->module_index_cache, p->num_used_modules, modules))) return ret; modules-=p->num_used_modules; #ifdef PIKE_DEBUG if( ((char *)modules ) < (char*)buffer_ptr(&c->used_modules)) Pike_fatal("Modules out of whack!\n"); #endif } } return resolve_identifier(ident); } /* Look up a predefined identifier. */ struct node_s *find_predef_identifier(struct pike_string *ident) { struct compilation *c = THIS_COMPILATION; node *tmp = mkconstantsvaluenode(&c->default_module); node *ret = index_node(tmp, "predef", ident); if(ret && !ret->name) add_ref(ret->name = ident); free_node(tmp); return ret; } /*! @decl constant UNDEFINED *! *! The undefined value; ie a zero for which @[zero_type()] returns 1. */ int low_resolve_identifier(struct pike_string *ident) { struct compilation *c = THIS_COMPILATION; node *ret = NULL; /* Handle UNDEFINED */ if (ident == UNDEFINED_string) { push_undefined(); return 1; } if(c->resolve_cache) { struct svalue *tmp=low_mapping_string_lookup(c->resolve_cache,ident); if(tmp) { if(IS_UNDEFINED (tmp)) { return 0; } push_svalue(tmp); return 1; } } CHECK_COMPILER(); ref_push_string(ident); if (!safe_apply_current2(PC_RESOLV_FUN_NUM, 1, NULL)) handle_compile_exception ("Error resolving '%S'.", ident); if (Pike_compiler->compiler_pass != COMPILER_PASS_LAST) { /* If we get a program that hasn't gone through pass 1 yet then we * have to register a dependency now in our pass 1 so that our * pass 2 gets delayed. Otherwise the other program might still be * just as unfinished when we come back here in pass 2. */ struct program *p = NULL; if (TYPEOF(Pike_sp[-1]) == T_PROGRAM) p = Pike_sp[-1].u.program; else if (TYPEOF(Pike_sp[-1]) == T_OBJECT || (TYPEOF(Pike_sp[-1]) == T_FUNCTION && SUBTYPEOF(Pike_sp[-1]) != FUNCTION_BUILTIN)) p = Pike_sp[-1].u.object->prog; if (p && !(p->flags & PROGRAM_PASS_1_DONE)) report_compiler_dependency (p); } if (Pike_compiler->compiler_pass == COMPILER_PASS_LAST && ((TYPEOF(Pike_sp[-1]) == T_OBJECT &&

pike.git/ src/ program.c > 491b6d4815a6a709e86f7eca7df4f712c3c70ca2 [Annotate]