pike.git/src/program.c:95489a21a8ffb04d83963bf58c2b88fd78db8abe

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10682 10683 10684 10685 10686 10687 10688 10689 10690 10691 10692 10693 10694 10695 10696 10697 10698 10699 10700 10701 10702 10703 10704 10705 10706 10707 10708 10709 10710 10711 10712 10713 10714 10715 10716 10717 10718 10719 10720 10721 10722 10723 10724 10725 10726 10727 10728 10729 10730 10731 10732 10733 10734 10735 10736 10737 10738 10739 10740 10741 10742 10743 10744 10745 10746 10747 /* || 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. || $Id: program.c,v 1.728 2008/06/29 12:37:10 nilsson Exp $ */ #include "global.h" #include "program.h" #include "object.h" #include "dynamic_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 "hashtable.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 "stuff.h" #include "mapping.h" #include "cyclic.h" #include "pike_security.h" #include "pike_types.h" #include "opcodes.h" #include "version.h" #include "block_alloc.h" #include "pikecode.h" #include "pike_compiler.h" #include "module_support.h" #include <errno.h> #include <fcntl.h> #define sp Pike_sp #undef ATTRIBUTE #define ATTRIBUTE(X) static void low_enter_compiler(struct object *ce, int inherit); static void exit_program_struct(struct program *); static size_t add_xstorage(size_t size, size_t alignment, ptrdiff_t modulo_orig); #undef EXIT_BLOCK #define EXIT_BLOCK(P) exit_program_struct( (P) ) #undef COUNT_OTHER #define COUNT_OTHER() do{ \ struct program *p; \ for(p=first_program;p;p=p->next) \ { \ size+=p->total_size - sizeof (struct program); \ } \ }while(0) BLOCK_ALLOC_FILL_PAGES(program, 4) /* #define COMPILER_DEBUG */ /* #define PROGRAM_BUILD_DEBUG */ #ifdef COMPILER_DEBUG #define CDFPRINTF(X) fprintf X #else /* !COMPILER_DEBUG */ #define CDFPRINTF(X) #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. * - Holistiska Centralbyrån (Hubbe) */ /* Define the size of the cache that is used for method lookup. */ /* A value of zero disables this cache */ #define FIND_FUNCTION_HASHSIZE 15013 /* Programs with less methods will not use the cache for method lookups.. */ #define FIND_FUNCTION_HASH_TRESHOLD 9 #define DECLARE #include "compilation.h" struct pike_string *this_program_string; static struct pike_string *this_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; const char *const lfun_names[] = { "__INIT", "create", "destroy", "`+", "`-", "`&", "`|", "`^", "`<<", "`>>", "`*", "`/", "`%", "`~", "`==", "`<", "`>", "__hash", "cast", "`!", "`[]", "`[]=", "`->", "`->=", "_sizeof", "_indices", "_values", "`()", "``+", "``-", "``&", "``|", "``^", "``<<", "``>>", "``*", "``/", "``%", "`+=", "_is_type", "_sprintf", "_equal", "_m_delete", "_get_iterator", "`[..]", /* NOTE: After this point there are only fake lfuns. */ "_search", }; 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), /* "destroy", */ 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,tVoid,tMix), /* "`->", */ tFuncV(tStr tSetvar(0,tZero),tVoid,tVar(0)), /* "`->=", */ tFuncV(tNone,tVoid,tInt), /* "_sizeof", */ tFuncV(tNone,tVoid,tArray), /* "_indices", */ tFuncV(tNone,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), tVoid, tMix), /* "_search", */ }; /* 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()], @[destroy()] *! *! @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 *! In Pike 7.2 and later this function can be created implicitly *! by the compiler using the new syntax: *! @code *! class Foo(int foo) { *! int bar; *! } *! @endcode *! In the above case an implicit @[lfun::create()] is created, and *! it's equvivalent to: *! @code *! class Foo { *! int foo; *! int bar; *! protected void create(int foo) *! { *! local::foo = foo; *! } *! } *! @endcode *! *! @seealso *! @[lfun::__INIT()], @[lfun::destroy()] */ /*! @decl void lfun::destroy (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{destroy@} 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{destroy@} *! 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::destroy] 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 destroy() { *! if (!Super::this) *! error ("My parent has been destructed!\n"); *! } *! } *! Sub sub = Sub(); *! protected void destroy() { *! 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::destroy], all accessible *! non-objects and objects without @expr{destroy@} functions are *! still intact. They are not freed if the @expr{destroy@} function *! adds external references to them. However, all objects with *! @[lfun::destroy] in the cycle are already scheduled for *! destruction and will therefore be destroyed even if external *! references are added to them. *! *! @note *! The garbage collector had completely random destruct order in *! versions prior to 7.2. *! *! @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) *! *! Equality test callback. *! *! @note *! If this is implemented it might be necessary to implement *! @[lfun::__hash] too. Otherwise mappings might hold several *! objects as indices which are duplicates according to this *! function. Various other functions that use hashing also might *! not work correctly, e.g. @[predef::Array.uniq]. *! *! @note *! It's assumed that this function is side-effect free. *! *! @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. *! *! This function gets called by various mapping operations when the *! object is used as index in a mapping. It should return an *! integer that corresponds to the object in such a way that all *! values which @[lfun::`==] considers equal to the object gets 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::`==] */ /*! @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 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::`[..]] */ /*! @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 mixed lfun::`[]=(zero arg1, zero arg2) *! *! Index assignment callback. *! *! @seealso *! @[predef::`[]=()], @[lfun::`->=()] */ /*! @decl mixed lfun::`->(string arg) *! *! Arrow index callback. *! *! @note *! It's assumed that this function is side-effect free. *! *! @seealso *! @[predef::`->()] */ /*! @decl mixed lfun::`->=(string arg1, zero arg2) *! *! Arrow index assignment callback. *! *! @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() *! *! 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()] */ /*! @decl array lfun::_values() *! *! 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()] */ /*! @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. *! *! @note *! It's assumed that this function is side-effect free. *! *! @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::_search(mixed needle, mixed|void start) *! *! Search callback. *! *! @seealso *! @[predef::search()] */ /*! @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 *null_program=0; struct program *compilation_program = 0; struct program *compilation_env_program = 0; struct object *compilation_environment = NULL; struct program *gc_internal_program = 0; static struct program *gc_mark_program_pos = 0; static struct mapping *resolve_cache=0; #ifdef PIKE_DEBUG #define CHECK_FILE_ENTRY(PROG, POS, LEN, SHIFT) \ do { \ if (SHIFT < 0 || SHIFT > 2 || \ POS + (LEN << SHIFT) > PROG->linenumbers + PROG->num_linenumbers) \ Pike_fatal ("Invalid file entry in linenumber info.\n"); \ } while (0) #else #define CHECK_FILE_ENTRY(PROG, POS, LEN, SHIFT) do {} while (0) #endif int 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_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_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. */ #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((void *)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 ); \ } #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((void *)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 != 1) { \ 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((void *)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]); } } void ins_short(int 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 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<<s->type) & (BIT_MAPPING | BIT_OBJECT | BIT_PROGRAM)) { c->num_used_modules++; Pike_compiler->num_used_modules++; assign_svalue_no_free((struct svalue *) low_make_buf_space(sizeof(struct svalue), &c->used_modules), s); if(Pike_compiler->module_index_cache) { free_mapping(Pike_compiler->module_index_cache); Pike_compiler->module_index_cache=0; } }else{ yyerror("Module is neither mapping nor object"); } } void unuse_modules(INT32 howmany) { struct compilation *c = THIS_COMPILATION; if(!howmany) return; #ifdef PIKE_DEBUG if(howmany *sizeof(struct svalue) > c->used_modules.s.len) Pike_fatal("Unusing too many modules.\n"); #endif c->num_used_modules -= howmany; Pike_compiler->num_used_modules-=howmany; low_make_buf_space(-sizeof(struct svalue)*howmany, &c->used_modules); free_svalues((struct svalue *)low_make_buf_space(0, &c->used_modules), howmany, BIT_MAPPING | BIT_OBJECT | BIT_PROGRAM); if(Pike_compiler->module_index_cache) { free_mapping(Pike_compiler->module_index_cache); Pike_compiler->module_index_cache=0; } } int low_find_shared_string_identifier(struct pike_string *name, struct program *prog); static struct node_s *index_modules(struct pike_string *ident, struct mapping **module_index_cache, int num_used_modules, struct svalue *modules) { if(*module_index_cache) { struct svalue *tmp=low_mapping_string_lookup(*module_index_cache,ident); if(tmp) { if(!(SAFE_IS_ZERO(tmp) && tmp->subtype==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 == 2 && ((Pike_sp[-1].type == T_OBJECT && Pike_sp[-1].u.object == placeholder_object) || (Pike_sp[-1].type == 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 (Pike_sp[-1].type), 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); } /* fprintf(stderr,"***Undefined.\n"); */ 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 *) (c->used_modules.s.str + c->used_modules.s.len); { 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_STATIC|SEE_PRIVATE); if(i!=-1) { if ((p->flags & COMPILATION_FORCE_RESOLVE) && (p->compiler_pass == 2) && ((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 ) < c->used_modules.s.str) Pike_fatal("Modules out of whack!\n"); #endif } } return resolve_identifier(ident); } /*! @decl constant UNDEFINED *! *! The undefined value; ie a zero for which @[zero_type()] returns 1. */ struct node_s *resolve_identifier(struct pike_string *ident) { struct compilation *c = THIS_COMPILATION; node *ret = NULL; /* Handle UNDEFINED */ if (ident == UNDEFINED_string) { struct svalue s; s.type = T_INT; s.subtype = NUMBER_UNDEFINED; s.u.integer = 0; return mkconstantsvaluenode(&s); } if(resolve_cache) { struct svalue *tmp=low_mapping_string_lookup(resolve_cache,ident); if(tmp) { if(!IS_UNDEFINED (tmp)) return mkconstantsvaluenode(tmp); return 0; } } CHECK_COMPILER(); ref_push_string(ident); ref_push_string(c->lex.current_file); if (c->handler) { ref_push_object(c->handler); } else { push_int(0); } if (!safe_apply_current2(PC_RESOLV_FUN_NUM, 3, NULL)) handle_compile_exception ("Error resolving %S.", ident); if (Pike_compiler->compiler_pass == 2 && ((Pike_sp[-1].type == T_OBJECT && Pike_sp[-1].u.object == placeholder_object) || (Pike_sp[-1].type == T_PROGRAM && Pike_sp[-1].u.program == placeholder_program))) { my_yyerror("Got placeholder %s (resolver problem) " "when resolving %S.", get_name_of_type (Pike_sp[-1].type), ident->str); } else { if(!resolve_cache) resolve_cache=dmalloc_touch(struct mapping *, allocate_mapping(10)); mapping_string_insert(resolve_cache,ident,Pike_sp-1); if(!IS_UNDEFINED (Pike_sp-1)) { ret=mkconstantsvaluenode(Pike_sp-1); } } pop_stack(); return ret; } /*! @decl constant this *! *! Builtin read only variable that evaluates to the current object. *! *! @seealso *! @[this_program], @[this_object()] */ /*! @decl constant this_program *! *! Builtin constant that evaluates to the current program. *! *! @seealso *! @[this], @[this_object()] */ /* If the identifier is recognized as one of the magic identifiers, * like "this", "this_program" or "`->" when preceded by ::, then a * suitable node is returned, NULL otherwise. * * inherit_num is -1 when no specific inherit has been specified; ie * either when the identifier has no prefix (colon_colon_ref == 0) or * when the identifier has the prefix :: without any preceding identifier * (colon_colon_ref == 1). */ struct node_s *program_magic_identifier (struct program_state *state, int state_depth, int inherit_num, struct pike_string *ident, int colon_colon_ref) { #if 0 fprintf (stderr, "magic_identifier (state, %d, %d, %s, %d)\n", state_depth, inherit_num, ident->str, colon_colon_ref); #endif if (!inherit_num && TEST_COMPAT(7,6)) { /* Pike 7.6 and earlier couldn't refer to the current inherit. */ inherit_num = -1; }

pike.git/ src/ program.c > 95489a21a8ffb04d83963bf58c2b88fd78db8abe [Annotate]