X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/4c79ee7a1e7564ef83d0ac25d6677fdebb3ec7aa..a03745377e2ca3b237c839d07c73106bdf88ac3e:/scope.h diff --git a/scope.h b/scope.h index a8e13a5..50fd752 100644 --- a/scope.h +++ b/scope.h @@ -1,6 +1,7 @@ /* scope.h * - * Copyright (c) 1997-2003, Larry Wall + * Copyright (C) 1993, 1994, 1996, 1997, 1998, 1999, + * 2000, 2001, 2002, 2004, 2005 by Larry Wall and others * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. @@ -46,12 +47,16 @@ #define SAVEt_MORTALIZESV 36 #define SAVEt_SHARED_PVREF 37 #define SAVEt_BOOL 38 +#define SAVEt_SET_SVFLAGS 39 +#define SAVEt_SAVESWITCHSTACK 40 +#define SAVEt_COP_ARYBASE 41 #ifndef SCOPE_SAVES_SIGNAL_MASK #define SCOPE_SAVES_SIGNAL_MASK 0 #endif -#define SSCHECK(need) if (PL_savestack_ix + need > PL_savestack_max) savestack_grow() +#define SSCHECK(need) if (PL_savestack_ix + (need) > PL_savestack_max) savestack_grow() +#define SSGROW(need) if (PL_savestack_ix + (need) > PL_savestack_max) savestack_grow_cnt(need) #define SSPUSHINT(i) (PL_savestack[PL_savestack_ix++].any_i32 = (I32)(i)) #define SSPUSHLONG(i) (PL_savestack[PL_savestack_ix++].any_long = (long)(i)) #define SSPUSHBOOL(p) (PL_savestack[PL_savestack_ix++].any_bool = (p)) @@ -94,13 +99,11 @@ Closing bracket on a callback. See C and L. #define ENTER \ STMT_START { \ push_scope(); \ - DEBUG_l(WITH_THR(Perl_deb(aTHX_ "ENTER scope %ld at %s:%d\n", \ - PL_scopestack_ix, __FILE__, __LINE__))); \ + DEBUG_SCOPE("ENTER") \ } STMT_END #define LEAVE \ STMT_START { \ - DEBUG_l(WITH_THR(Perl_deb(aTHX_ "LEAVE scope %ld at %s:%d\n", \ - PL_scopestack_ix, __FILE__, __LINE__))); \ + DEBUG_SCOPE("LEAVE") \ pop_scope(); \ } STMT_END #else @@ -109,36 +112,33 @@ Closing bracket on a callback. See C and L. #endif #define LEAVE_SCOPE(old) if (PL_savestack_ix > old) leave_scope(old) -/* - * Not using SOFT_CAST on SAVESPTR, SAVEGENERICSV and SAVEFREESV - * because these are used for several kinds of pointer values - */ -#define SAVEI8(i) save_I8(SOFT_CAST(I8*)&(i)) -#define SAVEI16(i) save_I16(SOFT_CAST(I16*)&(i)) -#define SAVEI32(i) save_I32(SOFT_CAST(I32*)&(i)) -#define SAVEINT(i) save_int(SOFT_CAST(int*)&(i)) -#define SAVEIV(i) save_iv(SOFT_CAST(IV*)&(i)) -#define SAVELONG(l) save_long(SOFT_CAST(long*)&(l)) -#define SAVEBOOL(b) save_bool(SOFT_CAST(bool*)&(b)) +#define SAVEI8(i) save_I8((I8*)&(i)) +#define SAVEI16(i) save_I16((I16*)&(i)) +#define SAVEI32(i) save_I32((I32*)&(i)) +#define SAVEINT(i) save_int((int*)&(i)) +#define SAVEIV(i) save_iv((IV*)&(i)) +#define SAVELONG(l) save_long((long*)&(l)) +#define SAVEBOOL(b) save_bool((bool*)&(b)) #define SAVESPTR(s) save_sptr((SV**)&(s)) -#define SAVEPPTR(s) save_pptr(SOFT_CAST(char**)&(s)) +#define SAVEPPTR(s) save_pptr((char**)&(s)) #define SAVEVPTR(s) save_vptr((void*)&(s)) #define SAVEPADSV(s) save_padsv(s) #define SAVEFREESV(s) save_freesv((SV*)(s)) #define SAVEMORTALIZESV(s) save_mortalizesv((SV*)(s)) -#define SAVEFREEOP(o) save_freeop(SOFT_CAST(OP*)(o)) -#define SAVEFREEPV(p) save_freepv(SOFT_CAST(char*)(p)) -#define SAVECLEARSV(sv) save_clearsv(SOFT_CAST(SV**)&(sv)) +#define SAVEFREEOP(o) save_freeop((OP*)(o)) +#define SAVEFREEPV(p) save_freepv((char*)(p)) +#define SAVECLEARSV(sv) save_clearsv((SV**)&(sv)) #define SAVEGENERICSV(s) save_generic_svref((SV**)&(s)) #define SAVEGENERICPV(s) save_generic_pvref((char**)&(s)) #define SAVESHAREDPV(s) save_shared_pvref((char**)&(s)) +#define SAVESETSVFLAGS(sv,mask,val) save_set_svflags(sv,mask,val) #define SAVEDELETE(h,k,l) \ - save_delete(SOFT_CAST(HV*)(h), SOFT_CAST(char*)(k), (I32)(l)) + save_delete((HV*)(h), (char*)(k), (I32)(l)) #define SAVEDESTRUCTOR(f,p) \ - save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), SOFT_CAST(void*)(p)) + save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), (void*)(p)) #define SAVEDESTRUCTOR_X(f,p) \ - save_destructor_x((DESTRUCTORFUNC_t)(f), SOFT_CAST(void*)(p)) + save_destructor_x((DESTRUCTORFUNC_t)(f), (void*)(p)) #define SAVESTACK_POS() \ STMT_START { \ @@ -150,14 +150,18 @@ Closing bracket on a callback. See C and L. #define SAVEOP() save_op() #define SAVEHINTS() \ - STMT_START { \ - if (PL_hints & HINT_LOCALIZE_HH) \ - save_hints(); \ - else { \ - SSCHECK(2); \ - SSPUSHINT(PL_hints); \ - SSPUSHINT(SAVEt_HINTS); \ - } \ + STMT_START { \ + SSCHECK(4); \ + if (PL_hints & HINT_LOCALIZE_HH) { \ + SSPUSHPTR(GvHV(PL_hintgv)); \ + GvHV(PL_hintgv) = Perl_hv_copy_hints_hv(aTHX_ GvHV(PL_hintgv)); \ + } \ + if (PL_compiling.cop_hints) { \ + PL_compiling.cop_hints->refcounted_he_refcnt++; \ + } \ + SSPUSHPTR(PL_compiling.cop_hints); \ + SSPUSHINT(PL_hints); \ + SSPUSHINT(SAVEt_HINTS); \ } STMT_END #define SAVECOMPPAD() \ @@ -167,6 +171,25 @@ Closing bracket on a callback. See C and L. SSPUSHINT(SAVEt_COMPPAD); \ } STMT_END +#define SAVESWITCHSTACK(f,t) \ + STMT_START { \ + SSCHECK(3); \ + SSPUSHPTR((SV*)(f)); \ + SSPUSHPTR((SV*)(t)); \ + SSPUSHINT(SAVEt_SAVESWITCHSTACK); \ + SWITCHSTACK((f),(t)); \ + PL_curstackinfo->si_stack = (t); \ + } STMT_END + +#define SAVECOPARYBASE(c) \ + STMT_START { \ + SSCHECK(3); \ + SSPUSHINT(CopARYBASE_get(c)); \ + SSPUSHPTR(c); \ + SSPUSHINT(SAVEt_COP_ARYBASE); \ + } STMT_END + + #ifdef USE_ITHREADS # define SAVECOPSTASH(c) SAVEPPTR(CopSTASHPV(c)) # define SAVECOPSTASH_FREE(c) SAVESHAREDPV(CopSTASHPV(c)) @@ -179,7 +202,7 @@ Closing bracket on a callback. See C and L. # define SAVECOPFILE_FREE(c) SAVEGENERICSV(CopFILEGV(c)) #endif -#define SAVECOPLINE(c) SAVEI16(CopLINE(c)) +#define SAVECOPLINE(c) SAVEI32(CopLINE(c)) /* SSNEW() temporarily allocates a specified number of bytes of data on the * savestack. It returns an integer index into the savestack, because a @@ -187,7 +210,7 @@ Closing bracket on a callback. See C and L. * SSNEWa() works like SSNEW(), but also aligns the data to the specified * number of bytes. MEM_ALIGNBYTES is perhaps the most useful. The * alignment will be preserved therough savestack reallocation *only* if - * realloc returns data aligned to a size divisible by `align'! + * realloc returns data aligned to a size divisible by "align"! * * SSPTR() converts the index returned by SSNEW/SSNEWa() into a pointer. */ @@ -201,200 +224,3 @@ Closing bracket on a callback. See C and L. #define SSPTR(off,type) ((type) ((char*)PL_savestack + off)) #define SSPTRt(off,type) ((type*) ((char*)PL_savestack + off)) -/* A jmpenv packages the state required to perform a proper non-local jump. - * Note that there is a start_env initialized when perl starts, and top_env - * points to this initially, so top_env should always be non-null. - * - * Existence of a non-null top_env->je_prev implies it is valid to call - * longjmp() at that runlevel (we make sure start_env.je_prev is always - * null to ensure this). - * - * je_mustcatch, when set at any runlevel to TRUE, means eval ops must - * establish a local jmpenv to handle exception traps. Care must be taken - * to restore the previous value of je_mustcatch before exiting the - * stack frame iff JMPENV_PUSH was not called in that stack frame. - * GSAR 97-03-27 - */ - -struct jmpenv { - struct jmpenv * je_prev; - Sigjmp_buf je_buf; /* only for use if !je_throw */ - int je_ret; /* last exception thrown */ - bool je_mustcatch; /* need to call longjmp()? */ -#ifdef PERL_FLEXIBLE_EXCEPTIONS - void (*je_throw)(int v); /* last for bincompat */ - bool je_noset; /* no need for setjmp() */ -#endif -}; - -typedef struct jmpenv JMPENV; - -#ifdef OP_IN_REGISTER -#define OP_REG_TO_MEM PL_opsave = op -#define OP_MEM_TO_REG op = PL_opsave -#else -#define OP_REG_TO_MEM NOOP -#define OP_MEM_TO_REG NOOP -#endif - -/* - * How to build the first jmpenv. - * - * top_env needs to be non-zero. It points to an area - * in which longjmp() stuff is stored, as C callstack - * info there at least is thread specific this has to - * be per-thread. Otherwise a 'die' in a thread gives - * that thread the C stack of last thread to do an eval {}! - */ - -#define JMPENV_BOOTSTRAP \ - STMT_START { \ - Zero(&PL_start_env, 1, JMPENV); \ - PL_start_env.je_ret = -1; \ - PL_start_env.je_mustcatch = TRUE; \ - PL_top_env = &PL_start_env; \ - } STMT_END - -#ifdef PERL_FLEXIBLE_EXCEPTIONS - -/* - * These exception-handling macros are split up to - * ease integration with C++ exceptions. - * - * To use C++ try+catch to catch Perl exceptions, an extension author - * needs to first write an extern "C" function to throw an appropriate - * exception object; typically it will be or contain an integer, - * because Perl's internals use integers to track exception types: - * extern "C" { static void thrower(int i) { throw i; } } - * - * Then (as shown below) the author needs to use, not the simple - * JMPENV_PUSH, but several of its constitutent macros, to arrange for - * the Perl internals to call thrower() rather than longjmp() to - * report exceptions: - * - * dJMPENV; - * JMPENV_PUSH_INIT(thrower); - * try { - * ... stuff that may throw exceptions ... - * } - * catch (int why) { // or whatever matches thrower() - * JMPENV_POST_CATCH; - * EXCEPT_SET(why); - * switch (why) { - * ... // handle various Perl exception codes - * } - * } - * JMPENV_POP; // don't forget this! - */ - -/* - * Function that catches/throws, and its callback for the - * body of protected processing. - */ -typedef void *(CPERLscope(*protect_body_t)) (pTHX_ va_list); -typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env, - int *, protect_body_t, ...); - -#define dJMPENV JMPENV cur_env; \ - volatile JMPENV *pcur_env = ((cur_env.je_noset = 0),&cur_env) - -#define JMPENV_PUSH_INIT_ENV(ce,THROWFUNC) \ - STMT_START { \ - (ce).je_throw = (THROWFUNC); \ - (ce).je_ret = -1; \ - (ce).je_mustcatch = FALSE; \ - (ce).je_prev = PL_top_env; \ - PL_top_env = &(ce); \ - OP_REG_TO_MEM; \ - } STMT_END - -#define JMPENV_PUSH_INIT(THROWFUNC) JMPENV_PUSH_INIT_ENV(*(JMPENV*)pcur_env,THROWFUNC) - -#define JMPENV_POST_CATCH_ENV(ce) \ - STMT_START { \ - OP_MEM_TO_REG; \ - PL_top_env = &(ce); \ - } STMT_END - -#define JMPENV_POST_CATCH JMPENV_POST_CATCH_ENV(*(JMPENV*)pcur_env) - -#define JMPENV_PUSH_ENV(ce,v) \ - STMT_START { \ - if (!(ce).je_noset) { \ - DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \ - ce, PL_top_env)); \ - JMPENV_PUSH_INIT_ENV(ce,NULL); \ - EXCEPT_SET_ENV(ce,PerlProc_setjmp((ce).je_buf, SCOPE_SAVES_SIGNAL_MASK));\ - (ce).je_noset = 1; \ - } \ - else \ - EXCEPT_SET_ENV(ce,0); \ - JMPENV_POST_CATCH_ENV(ce); \ - (v) = EXCEPT_GET_ENV(ce); \ - } STMT_END - -#define JMPENV_PUSH(v) JMPENV_PUSH_ENV(*(JMPENV*)pcur_env,v) - -#define JMPENV_POP_ENV(ce) \ - STMT_START { \ - if (PL_top_env == &(ce)) \ - PL_top_env = (ce).je_prev; \ - } STMT_END - -#define JMPENV_POP JMPENV_POP_ENV(*(JMPENV*)pcur_env) - -#define JMPENV_JUMP(v) \ - STMT_START { \ - OP_REG_TO_MEM; \ - if (PL_top_env->je_prev) { \ - if (PL_top_env->je_throw) \ - PL_top_env->je_throw(v); \ - else \ - PerlProc_longjmp(PL_top_env->je_buf, (v)); \ - } \ - if ((v) == 2) \ - PerlProc_exit(STATUS_NATIVE_EXPORT); \ - PerlIO_printf(Perl_error_log, "panic: top_env\n"); \ - PerlProc_exit(1); \ - } STMT_END - -#define EXCEPT_GET_ENV(ce) ((ce).je_ret) -#define EXCEPT_GET EXCEPT_GET_ENV(*(JMPENV*)pcur_env) -#define EXCEPT_SET_ENV(ce,v) ((ce).je_ret = (v)) -#define EXCEPT_SET(v) EXCEPT_SET_ENV(*(JMPENV*)pcur_env,v) - -#else /* !PERL_FLEXIBLE_EXCEPTIONS */ - -#define dJMPENV JMPENV cur_env - -#define JMPENV_PUSH(v) \ - STMT_START { \ - DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \ - &cur_env, PL_top_env)); \ - cur_env.je_prev = PL_top_env; \ - OP_REG_TO_MEM; \ - cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \ - OP_MEM_TO_REG; \ - PL_top_env = &cur_env; \ - cur_env.je_mustcatch = FALSE; \ - (v) = cur_env.je_ret; \ - } STMT_END - -#define JMPENV_POP \ - STMT_START { PL_top_env = cur_env.je_prev; } STMT_END - -#define JMPENV_JUMP(v) \ - STMT_START { \ - OP_REG_TO_MEM; \ - if (PL_top_env->je_prev) \ - PerlProc_longjmp(PL_top_env->je_buf, (v)); \ - if ((v) == 2) \ - PerlProc_exit(STATUS_NATIVE_EXPORT); \ - PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \ - PerlProc_exit(1); \ - } STMT_END - -#endif /* PERL_FLEXIBLE_EXCEPTIONS */ - -#define CATCH_GET (PL_top_env->je_mustcatch) -#define CATCH_SET(v) (PL_top_env->je_mustcatch = (v))