386 lines
12 KiB
C
386 lines
12 KiB
C
#define SAVEt_ITEM 0
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#define SAVEt_SV 1
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#define SAVEt_AV 2
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#define SAVEt_HV 3
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#define SAVEt_INT 4
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#define SAVEt_LONG 5
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#define SAVEt_I32 6
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#define SAVEt_IV 7
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#define SAVEt_SPTR 8
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#define SAVEt_APTR 9
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#define SAVEt_HPTR 10
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#define SAVEt_PPTR 11
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#define SAVEt_NSTAB 12
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#define SAVEt_SVREF 13
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#define SAVEt_GP 14
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#define SAVEt_FREESV 15
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#define SAVEt_FREEOP 16
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#define SAVEt_FREEPV 17
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#define SAVEt_CLEARSV 18
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#define SAVEt_DELETE 19
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#define SAVEt_DESTRUCTOR 20
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#define SAVEt_REGCONTEXT 21
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#define SAVEt_STACK_POS 22
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#define SAVEt_I16 23
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#define SAVEt_AELEM 24
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#define SAVEt_HELEM 25
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#define SAVEt_OP 26
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#define SAVEt_HINTS 27
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#define SAVEt_ALLOC 28
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#define SAVEt_GENERIC_SVREF 29
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#define SAVEt_DESTRUCTOR_X 30
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#define SAVEt_VPTR 31
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#define SAVEt_I8 32
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#define SAVEt_COMPPAD 33
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#define SAVEt_GENERIC_PVREF 34
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#define SAVEt_PADSV 35
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#define SAVEt_MORTALIZESV 36
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#define SSCHECK(need) if (PL_savestack_ix + need > PL_savestack_max) savestack_grow()
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#define SSPUSHINT(i) (PL_savestack[PL_savestack_ix++].any_i32 = (I32)(i))
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#define SSPUSHLONG(i) (PL_savestack[PL_savestack_ix++].any_long = (long)(i))
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#define SSPUSHIV(i) (PL_savestack[PL_savestack_ix++].any_iv = (IV)(i))
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#define SSPUSHPTR(p) (PL_savestack[PL_savestack_ix++].any_ptr = (void*)(p))
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#define SSPUSHDPTR(p) (PL_savestack[PL_savestack_ix++].any_dptr = (p))
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#define SSPUSHDXPTR(p) (PL_savestack[PL_savestack_ix++].any_dxptr = (p))
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#define SSPOPINT (PL_savestack[--PL_savestack_ix].any_i32)
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#define SSPOPLONG (PL_savestack[--PL_savestack_ix].any_long)
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#define SSPOPIV (PL_savestack[--PL_savestack_ix].any_iv)
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#define SSPOPPTR (PL_savestack[--PL_savestack_ix].any_ptr)
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#define SSPOPDPTR (PL_savestack[--PL_savestack_ix].any_dptr)
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#define SSPOPDXPTR (PL_savestack[--PL_savestack_ix].any_dxptr)
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/*
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=for apidoc Ams||SAVETMPS
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Opening bracket for temporaries on a callback. See C<FREETMPS> and
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L<perlcall>.
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=for apidoc Ams||FREETMPS
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Closing bracket for temporaries on a callback. See C<SAVETMPS> and
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L<perlcall>.
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=for apidoc Ams||ENTER
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Opening bracket on a callback. See C<LEAVE> and L<perlcall>.
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=for apidoc Ams||LEAVE
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Closing bracket on a callback. See C<ENTER> and L<perlcall>.
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=cut
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*/
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#define SAVETMPS save_int((int*)&PL_tmps_floor), PL_tmps_floor = PL_tmps_ix
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#define FREETMPS if (PL_tmps_ix > PL_tmps_floor) free_tmps()
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#ifdef DEBUGGING
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#define ENTER \
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STMT_START { \
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push_scope(); \
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DEBUG_l(WITH_THR(Perl_deb(aTHX_ "ENTER scope %ld at %s:%d\n", \
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PL_scopestack_ix, __FILE__, __LINE__))); \
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} STMT_END
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#define LEAVE \
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STMT_START { \
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DEBUG_l(WITH_THR(Perl_deb(aTHX_ "LEAVE scope %ld at %s:%d\n", \
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PL_scopestack_ix, __FILE__, __LINE__))); \
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pop_scope(); \
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} STMT_END
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#else
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#define ENTER push_scope()
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#define LEAVE pop_scope()
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#endif
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#define LEAVE_SCOPE(old) if (PL_savestack_ix > old) leave_scope(old)
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/*
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* Not using SOFT_CAST on SAVESPTR, SAVEGENERICSV and SAVEFREESV
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* because these are used for several kinds of pointer values
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*/
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#define SAVEI8(i) save_I8(SOFT_CAST(I8*)&(i))
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#define SAVEI16(i) save_I16(SOFT_CAST(I16*)&(i))
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#define SAVEI32(i) save_I32(SOFT_CAST(I32*)&(i))
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#define SAVEINT(i) save_int(SOFT_CAST(int*)&(i))
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#define SAVEIV(i) save_iv(SOFT_CAST(IV*)&(i))
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#define SAVELONG(l) save_long(SOFT_CAST(long*)&(l))
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#define SAVESPTR(s) save_sptr((SV**)&(s))
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#define SAVEPPTR(s) save_pptr(SOFT_CAST(char**)&(s))
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#define SAVEVPTR(s) save_vptr((void*)&(s))
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#define SAVEPADSV(s) save_padsv(s)
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#define SAVEFREESV(s) save_freesv((SV*)(s))
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#define SAVEMORTALIZESV(s) save_mortalizesv((SV*)(s))
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#define SAVEFREEOP(o) save_freeop(SOFT_CAST(OP*)(o))
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#define SAVEFREEPV(p) save_freepv(SOFT_CAST(char*)(p))
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#define SAVECLEARSV(sv) save_clearsv(SOFT_CAST(SV**)&(sv))
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#define SAVEGENERICSV(s) save_generic_svref((SV**)&(s))
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#define SAVEGENERICPV(s) save_generic_pvref((char**)&(s))
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#define SAVEDELETE(h,k,l) \
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save_delete(SOFT_CAST(HV*)(h), SOFT_CAST(char*)(k), (I32)(l))
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#define SAVEDESTRUCTOR(f,p) \
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save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), SOFT_CAST(void*)(p))
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#define SAVEDESTRUCTOR_X(f,p) \
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save_destructor_x((DESTRUCTORFUNC_t)(f), SOFT_CAST(void*)(p))
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#define SAVESTACK_POS() \
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STMT_START { \
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SSCHECK(2); \
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SSPUSHINT(PL_stack_sp - PL_stack_base); \
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SSPUSHINT(SAVEt_STACK_POS); \
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} STMT_END
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#define SAVEOP() save_op()
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#define SAVEHINTS() \
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STMT_START { \
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if (PL_hints & HINT_LOCALIZE_HH) \
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save_hints(); \
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else { \
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SSCHECK(2); \
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SSPUSHINT(PL_hints); \
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SSPUSHINT(SAVEt_HINTS); \
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} \
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} STMT_END
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#define SAVECOMPPAD() \
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STMT_START { \
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if (PL_comppad && PL_curpad == AvARRAY(PL_comppad)) { \
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SSCHECK(2); \
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SSPUSHPTR((SV*)PL_comppad); \
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SSPUSHINT(SAVEt_COMPPAD); \
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} \
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else { \
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SAVEVPTR(PL_curpad); \
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SAVESPTR(PL_comppad); \
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} \
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} STMT_END
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#ifdef USE_ITHREADS
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# define SAVECOPSTASH(c) SAVEPPTR(CopSTASHPV(c))
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# define SAVECOPSTASH_FREE(c) SAVEGENERICPV(CopSTASHPV(c))
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# define SAVECOPFILE(c) SAVEPPTR(CopFILE(c))
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# define SAVECOPFILE_FREE(c) SAVEGENERICPV(CopFILE(c))
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#else
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# define SAVECOPSTASH(c) SAVESPTR(CopSTASH(c))
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# define SAVECOPSTASH_FREE(c) SAVECOPSTASH(c) /* XXX not refcounted */
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# define SAVECOPFILE(c) SAVESPTR(CopFILEGV(c))
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# define SAVECOPFILE_FREE(c) SAVEGENERICSV(CopFILEGV(c))
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#endif
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#define SAVECOPLINE(c) SAVEI16(CopLINE(c))
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/* SSNEW() temporarily allocates a specified number of bytes of data on the
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* savestack. It returns an integer index into the savestack, because a
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* pointer would get broken if the savestack is moved on reallocation.
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* SSNEWa() works like SSNEW(), but also aligns the data to the specified
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* number of bytes. MEM_ALIGNBYTES is perhaps the most useful. The
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* alignment will be preserved therough savestack reallocation *only* if
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* realloc returns data aligned to a size divisible by `align'!
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*
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* SSPTR() converts the index returned by SSNEW/SSNEWa() into a pointer.
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*/
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#define SSNEW(size) Perl_save_alloc(aTHX_ (size), 0)
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#define SSNEWt(n,t) SSNEW((n)*sizeof(t))
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#define SSNEWa(size,align) Perl_save_alloc(aTHX_ (size), \
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(align - ((int)((caddr_t)&PL_savestack[PL_savestack_ix]) % align)) % align)
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#define SSNEWat(n,t,align) SSNEWa((n)*sizeof(t), align)
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#define SSPTR(off,type) ((type) ((char*)PL_savestack + off))
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#define SSPTRt(off,type) ((type*) ((char*)PL_savestack + off))
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/* A jmpenv packages the state required to perform a proper non-local jump.
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* Note that there is a start_env initialized when perl starts, and top_env
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* points to this initially, so top_env should always be non-null.
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*
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* Existence of a non-null top_env->je_prev implies it is valid to call
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* longjmp() at that runlevel (we make sure start_env.je_prev is always
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* null to ensure this).
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*
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* je_mustcatch, when set at any runlevel to TRUE, means eval ops must
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* establish a local jmpenv to handle exception traps. Care must be taken
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* to restore the previous value of je_mustcatch before exiting the
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* stack frame iff JMPENV_PUSH was not called in that stack frame.
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* GSAR 97-03-27
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*/
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struct jmpenv {
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struct jmpenv * je_prev;
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Sigjmp_buf je_buf; /* only for use if !je_throw */
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int je_ret; /* last exception thrown */
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bool je_mustcatch; /* need to call longjmp()? */
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#ifdef PERL_FLEXIBLE_EXCEPTIONS
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void (*je_throw)(int v); /* last for bincompat */
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bool je_noset; /* no need for setjmp() */
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#endif
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};
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typedef struct jmpenv JMPENV;
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#ifdef OP_IN_REGISTER
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#define OP_REG_TO_MEM PL_opsave = op
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#define OP_MEM_TO_REG op = PL_opsave
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#else
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#define OP_REG_TO_MEM NOOP
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#define OP_MEM_TO_REG NOOP
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#endif
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/*
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* How to build the first jmpenv.
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*
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* top_env needs to be non-zero. It points to an area
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* in which longjmp() stuff is stored, as C callstack
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* info there at least is thread specific this has to
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* be per-thread. Otherwise a 'die' in a thread gives
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* that thread the C stack of last thread to do an eval {}!
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*/
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#define JMPENV_BOOTSTRAP \
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STMT_START { \
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Zero(&PL_start_env, 1, JMPENV); \
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PL_start_env.je_ret = -1; \
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PL_start_env.je_mustcatch = TRUE; \
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PL_top_env = &PL_start_env; \
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} STMT_END
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#ifdef PERL_FLEXIBLE_EXCEPTIONS
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/*
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* These exception-handling macros are split up to
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* ease integration with C++ exceptions.
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*
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* To use C++ try+catch to catch Perl exceptions, an extension author
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* needs to first write an extern "C" function to throw an appropriate
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* exception object; typically it will be or contain an integer,
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* because Perl's internals use integers to track exception types:
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* extern "C" { static void thrower(int i) { throw i; } }
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*
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* Then (as shown below) the author needs to use, not the simple
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* JMPENV_PUSH, but several of its constitutent macros, to arrange for
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* the Perl internals to call thrower() rather than longjmp() to
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* report exceptions:
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*
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* dJMPENV;
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* JMPENV_PUSH_INIT(thrower);
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* try {
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* ... stuff that may throw exceptions ...
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* }
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* catch (int why) { // or whatever matches thrower()
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* JMPENV_POST_CATCH;
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* EXCEPT_SET(why);
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* switch (why) {
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* ... // handle various Perl exception codes
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* }
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* }
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* JMPENV_POP; // don't forget this!
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*/
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/*
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* Function that catches/throws, and its callback for the
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* body of protected processing.
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*/
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typedef void *(CPERLscope(*protect_body_t)) (pTHX_ va_list);
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typedef void *(CPERLscope(*protect_proc_t)) (pTHX_ volatile JMPENV *pcur_env,
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int *, protect_body_t, ...);
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#define dJMPENV JMPENV cur_env; \
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volatile JMPENV *pcur_env = ((cur_env.je_noset = 0),&cur_env)
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#define JMPENV_PUSH_INIT_ENV(ce,THROWFUNC) \
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STMT_START { \
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(ce).je_throw = (THROWFUNC); \
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(ce).je_ret = -1; \
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(ce).je_mustcatch = FALSE; \
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(ce).je_prev = PL_top_env; \
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PL_top_env = &(ce); \
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OP_REG_TO_MEM; \
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} STMT_END
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#define JMPENV_PUSH_INIT(THROWFUNC) JMPENV_PUSH_INIT_ENV(*(JMPENV*)pcur_env,THROWFUNC)
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#define JMPENV_POST_CATCH_ENV(ce) \
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STMT_START { \
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OP_MEM_TO_REG; \
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PL_top_env = &(ce); \
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} STMT_END
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#define JMPENV_POST_CATCH JMPENV_POST_CATCH_ENV(*(JMPENV*)pcur_env)
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#define JMPENV_PUSH_ENV(ce,v) \
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STMT_START { \
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if (!(ce).je_noset) { \
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DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
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ce, PL_top_env)); \
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JMPENV_PUSH_INIT_ENV(ce,NULL); \
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EXCEPT_SET_ENV(ce,PerlProc_setjmp((ce).je_buf, 1));\
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(ce).je_noset = 1; \
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} \
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else \
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EXCEPT_SET_ENV(ce,0); \
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JMPENV_POST_CATCH_ENV(ce); \
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(v) = EXCEPT_GET_ENV(ce); \
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} STMT_END
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#define JMPENV_PUSH(v) JMPENV_PUSH_ENV(*(JMPENV*)pcur_env,v)
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#define JMPENV_POP_ENV(ce) \
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STMT_START { \
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if (PL_top_env == &(ce)) \
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PL_top_env = (ce).je_prev; \
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} STMT_END
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#define JMPENV_POP JMPENV_POP_ENV(*(JMPENV*)pcur_env)
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#define JMPENV_JUMP(v) \
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STMT_START { \
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OP_REG_TO_MEM; \
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if (PL_top_env->je_prev) { \
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if (PL_top_env->je_throw) \
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PL_top_env->je_throw(v); \
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else \
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PerlProc_longjmp(PL_top_env->je_buf, (v)); \
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} \
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if ((v) == 2) \
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PerlProc_exit(STATUS_NATIVE_EXPORT); \
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PerlIO_printf(Perl_error_log, "panic: top_env\n"); \
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PerlProc_exit(1); \
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} STMT_END
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#define EXCEPT_GET_ENV(ce) ((ce).je_ret)
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#define EXCEPT_GET EXCEPT_GET_ENV(*(JMPENV*)pcur_env)
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#define EXCEPT_SET_ENV(ce,v) ((ce).je_ret = (v))
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#define EXCEPT_SET(v) EXCEPT_SET_ENV(*(JMPENV*)pcur_env,v)
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#else /* !PERL_FLEXIBLE_EXCEPTIONS */
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#define dJMPENV JMPENV cur_env
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#define JMPENV_PUSH(v) \
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STMT_START { \
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DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
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&cur_env, PL_top_env)); \
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cur_env.je_prev = PL_top_env; \
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OP_REG_TO_MEM; \
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cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, 1); \
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OP_MEM_TO_REG; \
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PL_top_env = &cur_env; \
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cur_env.je_mustcatch = FALSE; \
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(v) = cur_env.je_ret; \
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} STMT_END
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#define JMPENV_POP \
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STMT_START { PL_top_env = cur_env.je_prev; } STMT_END
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#define JMPENV_JUMP(v) \
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STMT_START { \
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OP_REG_TO_MEM; \
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if (PL_top_env->je_prev) \
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PerlProc_longjmp(PL_top_env->je_buf, (v)); \
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if ((v) == 2) \
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PerlProc_exit(STATUS_NATIVE_EXPORT); \
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PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \
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PerlProc_exit(1); \
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} STMT_END
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#endif /* PERL_FLEXIBLE_EXCEPTIONS */
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#define CATCH_GET (PL_top_env->je_mustcatch)
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#define CATCH_SET(v) (PL_top_env->je_mustcatch = (v))
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