373 lines
12 KiB
C
373 lines
12 KiB
C
#define SAVEt_ITEM 0
|
|
#define SAVEt_SV 1
|
|
#define SAVEt_AV 2
|
|
#define SAVEt_HV 3
|
|
#define SAVEt_INT 4
|
|
#define SAVEt_LONG 5
|
|
#define SAVEt_I32 6
|
|
#define SAVEt_IV 7
|
|
#define SAVEt_SPTR 8
|
|
#define SAVEt_APTR 9
|
|
#define SAVEt_HPTR 10
|
|
#define SAVEt_PPTR 11
|
|
#define SAVEt_NSTAB 12
|
|
#define SAVEt_SVREF 13
|
|
#define SAVEt_GP 14
|
|
#define SAVEt_FREESV 15
|
|
#define SAVEt_FREEOP 16
|
|
#define SAVEt_FREEPV 17
|
|
#define SAVEt_CLEARSV 18
|
|
#define SAVEt_DELETE 19
|
|
#define SAVEt_DESTRUCTOR 20
|
|
#define SAVEt_REGCONTEXT 21
|
|
#define SAVEt_STACK_POS 22
|
|
#define SAVEt_I16 23
|
|
#define SAVEt_AELEM 24
|
|
#define SAVEt_HELEM 25
|
|
#define SAVEt_OP 26
|
|
#define SAVEt_HINTS 27
|
|
#define SAVEt_ALLOC 28
|
|
#define SAVEt_GENERIC_SVREF 29
|
|
#define SAVEt_DESTRUCTOR_X 30
|
|
#define SAVEt_VPTR 31
|
|
#define SAVEt_I8 32
|
|
#define SAVEt_COMPPAD 33
|
|
|
|
#define SSCHECK(need) if (PL_savestack_ix + need > PL_savestack_max) savestack_grow()
|
|
#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 SSPUSHIV(i) (PL_savestack[PL_savestack_ix++].any_iv = (IV)(i))
|
|
#define SSPUSHPTR(p) (PL_savestack[PL_savestack_ix++].any_ptr = (void*)(p))
|
|
#define SSPUSHDPTR(p) (PL_savestack[PL_savestack_ix++].any_dptr = (p))
|
|
#define SSPUSHDXPTR(p) (PL_savestack[PL_savestack_ix++].any_dxptr = (p))
|
|
#define SSPOPINT (PL_savestack[--PL_savestack_ix].any_i32)
|
|
#define SSPOPLONG (PL_savestack[--PL_savestack_ix].any_long)
|
|
#define SSPOPIV (PL_savestack[--PL_savestack_ix].any_iv)
|
|
#define SSPOPPTR (PL_savestack[--PL_savestack_ix].any_ptr)
|
|
#define SSPOPDPTR (PL_savestack[--PL_savestack_ix].any_dptr)
|
|
#define SSPOPDXPTR (PL_savestack[--PL_savestack_ix].any_dxptr)
|
|
|
|
/*
|
|
=for apidoc Ams||SAVETMPS
|
|
Opening bracket for temporaries on a callback. See C<FREETMPS> and
|
|
L<perlcall>.
|
|
|
|
=for apidoc Ams||FREETMPS
|
|
Closing bracket for temporaries on a callback. See C<SAVETMPS> and
|
|
L<perlcall>.
|
|
|
|
=for apidoc Ams||ENTER
|
|
Opening bracket on a callback. See C<LEAVE> and L<perlcall>.
|
|
|
|
=for apidoc Ams||LEAVE
|
|
Closing bracket on a callback. See C<ENTER> and L<perlcall>.
|
|
|
|
=cut
|
|
*/
|
|
|
|
#define SAVETMPS save_int((int*)&PL_tmps_floor), PL_tmps_floor = PL_tmps_ix
|
|
#define FREETMPS if (PL_tmps_ix > PL_tmps_floor) free_tmps()
|
|
|
|
#ifdef DEBUGGING
|
|
#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__))); \
|
|
} 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__))); \
|
|
pop_scope(); \
|
|
} STMT_END
|
|
#else
|
|
#define ENTER push_scope()
|
|
#define LEAVE pop_scope()
|
|
#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 SAVESPTR(s) save_sptr((SV**)&(s))
|
|
#define SAVEPPTR(s) save_pptr(SOFT_CAST(char**)&(s))
|
|
#define SAVEVPTR(s) save_vptr((void*)&(s))
|
|
#define SAVEFREESV(s) save_freesv((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 SAVEGENERICSV(s) save_generic_svref((SV**)&(s))
|
|
#define SAVEDELETE(h,k,l) \
|
|
save_delete(SOFT_CAST(HV*)(h), SOFT_CAST(char*)(k), (I32)(l))
|
|
#define SAVEDESTRUCTOR(f,p) \
|
|
save_destructor((DESTRUCTORFUNC_NOCONTEXT_t)(f), SOFT_CAST(void*)(p))
|
|
|
|
#define SAVEDESTRUCTOR_X(f,p) \
|
|
save_destructor_x((DESTRUCTORFUNC_t)(f), SOFT_CAST(void*)(p))
|
|
|
|
#define SAVESTACK_POS() \
|
|
STMT_START { \
|
|
SSCHECK(2); \
|
|
SSPUSHINT(PL_stack_sp - PL_stack_base); \
|
|
SSPUSHINT(SAVEt_STACK_POS); \
|
|
} STMT_END
|
|
|
|
#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_END
|
|
|
|
#define SAVECOMPPAD() \
|
|
STMT_START { \
|
|
if (PL_comppad && PL_curpad == AvARRAY(PL_comppad)) { \
|
|
SSCHECK(2); \
|
|
SSPUSHPTR((SV*)PL_comppad); \
|
|
SSPUSHINT(SAVEt_COMPPAD); \
|
|
} \
|
|
else { \
|
|
SAVEVPTR(PL_curpad); \
|
|
SAVESPTR(PL_comppad); \
|
|
} \
|
|
} STMT_END
|
|
|
|
#ifdef USE_ITHREADS
|
|
# define SAVECOPSTASH(cop) SAVEPPTR(CopSTASHPV(cop))
|
|
# define SAVECOPFILE(cop) SAVEPPTR(CopFILE(cop))
|
|
#else
|
|
# define SAVECOPSTASH(cop) SAVESPTR(CopSTASH(cop))
|
|
# define SAVECOPFILE(cop) SAVESPTR(CopFILEGV(cop))
|
|
#endif
|
|
|
|
#define SAVECOPLINE(cop) SAVEI16(CopLINE(cop))
|
|
|
|
/* SSNEW() temporarily allocates a specified number of bytes of data on the
|
|
* savestack. It returns an integer index into the savestack, because a
|
|
* pointer would get broken if the savestack is moved on reallocation.
|
|
* 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'!
|
|
*
|
|
* SSPTR() converts the index returned by SSNEW/SSNEWa() into a pointer.
|
|
*/
|
|
|
|
#define SSNEW(size) save_alloc(size, 0)
|
|
#define SSNEWa(size,align) save_alloc(size, \
|
|
(align - ((int)((caddr_t)&PL_savestack[PL_savestack_ix]) % align)) % align)
|
|
|
|
#define SSPTR(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, 1));\
|
|
(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, 1); \
|
|
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))
|