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cop.h
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/* cop.h
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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.
*
* Control ops (cops) are one of the two ops OP_NEXTSTATE and OP_DBSTATE,
* that (loosely speaking) are statement separators.
* They hold information important for lexical state and error reporting.
* At run time, PL_curcop is set to point to the most recently executed cop,
* and thus can be used to determine our current state.
*/
/* A jmpenv packages the state required to perform a proper non-local jump.
* Note that there is a PL_start_env initialized when perl starts, and
* PL_top_env points to this initially, so PL_top_env should always be
* non-null.
*
* Existence of a non-null PL_top_env->je_prev implies it is valid to call
* longjmp() at that runlevel (we make sure PL_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
*/
MSVC_DIAG_IGNORE(4324)
struct jmpenv {
struct jmpenv * je_prev;
Sigjmp_buf je_buf; /* uninit if je_prev is NULL */
int je_ret; /* last exception thrown */
bool je_mustcatch; /* longjmp()s must be caught locally */
U16 je_old_delaymagic; /* saved PL_delaymagic */
SSize_t je_old_stack_hwm;
};
MSVC_DIAG_RESTORE
typedef struct jmpenv JMPENV;
#if defined PERL_USE_HWM
# define JE_OLD_STACK_HWM_zero PL_start_env.je_old_stack_hwm = 0
# define JE_OLD_STACK_HWM_save(je) \
(je).je_old_stack_hwm = PL_curstackinfo->si_stack_hwm
# define JE_OLD_STACK_HWM_restore(je) \
if (PL_curstackinfo->si_stack_hwm < (je).je_old_stack_hwm) \
PL_curstackinfo->si_stack_hwm = (je).je_old_stack_hwm
#else
# define JE_OLD_STACK_HWM_zero NOOP
# define JE_OLD_STACK_HWM_save(je) NOOP
# define JE_OLD_STACK_HWM_restore(je) 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 { \
PERL_POISON_EXPR(PoisonNew(&PL_start_env, 1, JMPENV));\
PL_top_env = &PL_start_env; \
PL_start_env.je_prev = NULL; \
PL_start_env.je_ret = -1; \
PL_start_env.je_mustcatch = TRUE; \
PL_start_env.je_old_delaymagic = 0; \
JE_OLD_STACK_HWM_zero; \
} STMT_END
/*
* PERL_FLEXIBLE_EXCEPTIONS
*
* All the flexible exceptions code has been removed.
* See the following threads for details:
*
* Message-Id: [email protected]
* https://www.nntp.perl.org/group/perl.perl5.porters/2004/07/msg93041.html
*
* Joshua's original patches (which weren't applied) and discussion:
*
* http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html
* http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html
* http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html
* http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html
* http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html
* http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html
*
* Chip's reworked patch and discussion:
*
* http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html
*
* The flaw in these patches (which went unnoticed at the time) was
* that they moved some code that could potentially die() out of the
* region protected by the setjmp()s. This caused exceptions within
* END blocks and such to not be handled by the correct setjmp().
*
* The original patches that introduces flexible exceptions were:
*
* https://github.com/Perl/perl5/commit/312caa8e97f1c7ee342a9895c2f0e749625b4929
* https://github.com/Perl/perl5/commit/14dd3ad8c9bf82cf09798a22cc89a9862dfd6d1a
*
*/
#define dJMPENV JMPENV cur_env
#define JMPENV_PUSH(v) \
STMT_START { \
DEBUG_l({ \
int i = 0; \
JMPENV *p = PL_top_env; \
while (p) { i++; p = p->je_prev; } \
Perl_deb(aTHX_ "JMPENV_PUSH pre level=%d in %s at %s:%d\n", \
i, SAFE_FUNCTION__, __FILE__, __LINE__); \
}); \
cur_env.je_prev = PL_top_env; \
JE_OLD_STACK_HWM_save(cur_env); \
/* setjmp() is callable in limited contexts which does not */ \
/* include assignment, so switch() instead */ \
switch (PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK)) { \
case 0: cur_env.je_ret = 0; break; \
case 1: cur_env.je_ret = 1; break; \
case 2: cur_env.je_ret = 2; break; \
case 3: cur_env.je_ret = 3; break; \
default: Perl_croak(aTHX_ "panic: unexpected setjmp() result\n"); \
} \
JE_OLD_STACK_HWM_restore(cur_env); \
PL_top_env = &cur_env; \
cur_env.je_mustcatch = FALSE; \
cur_env.je_old_delaymagic = PL_delaymagic; \
DEBUG_l({ \
int i = 0; \
JMPENV *p = PL_top_env; \
while (p) { i++; p = p->je_prev; } \
Perl_deb(aTHX_ "JMPENV_PUSH level=%d ret=%d in %s at %s:%d\n", \
i, cur_env.je_ret, SAFE_FUNCTION__, __FILE__, __LINE__); \
}); \
(v) = cur_env.je_ret; \
} STMT_END
#define JMPENV_POP \
STMT_START { \
DEBUG_l({ \
int i = -1; JMPENV *p = PL_top_env; \
while (p) { i++; p = p->je_prev; } \
Perl_deb(aTHX_ "JMPENV_POP level=%d in %s at %s:%d\n", \
i, SAFE_FUNCTION__, __FILE__, __LINE__);}) \
assert(PL_top_env == &cur_env); \
PL_delaymagic = cur_env.je_old_delaymagic; \
PL_top_env = cur_env.je_prev; \
} STMT_END
#define JMPENV_JUMP(v) \
STMT_START { \
DEBUG_l({ \
int i = -1; JMPENV *p = PL_top_env; \
while (p) { i++; p = p->je_prev; } \
Perl_deb(aTHX_ "JMPENV_JUMP(%d) level=%d in %s at %s:%d\n", \
(int)(v), i, SAFE_FUNCTION__, __FILE__, __LINE__);}) \
if (PL_top_env->je_prev) { \
assert((v) >= 0 && (v) <= 3); \
PerlProc_longjmp(PL_top_env->je_buf, (v)); \
} \
if ((v) == 2) \
PerlProc_exit(STATUS_EXIT); \
PerlIO_printf(PerlIO_stderr(), "panic: top_env, v=%d\n", (int)(v)); \
PerlProc_exit(1); \
} STMT_END
#define CATCH_GET (PL_top_env->je_mustcatch)
#define CATCH_SET(v) \
STMT_START { \
DEBUG_l( \
Perl_deb(aTHX_ \
"JUMPLEVEL set catch %d => %d (for %p) in %s at %s:%d\n", \
PL_top_env->je_mustcatch, (v), (void*)PL_top_env, \
SAFE_FUNCTION__, __FILE__, __LINE__);) \
PL_top_env->je_mustcatch = (v); \
} STMT_END
/*
=for apidoc_section $COP
*/
typedef struct refcounted_he COPHH;
#define COPHH_KEY_UTF8 REFCOUNTED_HE_KEY_UTF8
#define COPHH_EXISTS REFCOUNTED_HE_EXISTS
/*
=for apidoc Amx|SV *|cophh_fetch_pv |const COPHH *cophh|const char *key |U32 hash|U32 flags
=for apidoc_item|SV *|cophh_fetch_pvn|const COPHH *cophh|const char *key|STRLEN keylen|U32 hash|U32 flags
=for apidoc_item|SV *|cophh_fetch_pvs|const COPHH *cophh| "key" |U32 flags
=for apidoc_item|SV *|cophh_fetch_sv |const COPHH *cophh| SV *key |U32 hash|U32 flags
These look up the entry in the cop hints hash C<cophh> with the key specified by
C<key> (and C<keylen> in the C<pvn> form), returning that value as a mortal
scalar copy, or C<&PL_sv_placeholder> if there is no value associated with the
key.
The forms differ in how the key is specified.
In the plain C<pv> form, the key is a C language NUL-terminated string.
In the C<pvs> form, the key is a C language string literal.
In the C<pvn> form, an additional parameter, C<keylen>, specifies the length of
the string, which hence, may contain embedded-NUL characters.
In the C<sv> form, C<*key> is an SV, and the key is the PV extracted from that.
using C<L</SvPV_const>>.
C<hash> is a precomputed hash of the key string, or zero if it has not been
precomputed. This parameter is omitted from the C<pvs> form, as it is computed
automatically at compile time.
The only flag currently used from the C<flags> parameter is C<COPHH_KEY_UTF8>.
It is illegal to set this in the C<sv> form. In the C<pv*> forms, it specifies
whether the key octets are interpreted as UTF-8 (if set) or as Latin-1 (if
cleared). The C<sv> form uses the underlying SV to determine the UTF-8ness of
the octets.
=for apidoc Amnh||COPHH_KEY_UTF8
=cut
*/
#define cophh_fetch_pvn(cophh, key, keylen, hash, flags) \
Perl_refcounted_he_fetch_pvn(aTHX_ cophh, key, keylen, hash, \
(flags & COPHH_KEY_UTF8))
#define cophh_fetch_pvs(cophh, key, flags) \
Perl_refcounted_he_fetch_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, \
(flags & COPHH_KEY_UTF8))
#define cophh_fetch_pv(cophh, key, hash, flags) \
Perl_refcounted_he_fetch_pv(aTHX_ cophh, key, hash, \
(flags & COPHH_KEY_UTF8))
#define cophh_fetch_sv(cophh, key, hash, flags) \
Perl_refcounted_he_fetch_sv(aTHX_ cophh, key, hash, \
(flags & COPHH_KEY_UTF8))
/*
=for apidoc Amx|bool|cophh_exists_pvn|const COPHH *cophh|const char *key|STRLEN keylen|U32 hash|U32 flags
These look up the hint entry in the cop C<cop> with the key specified by
C<key> (and C<keylen> in the C<pvn> form), returning true if a value exists,
and false otherwise.
The forms differ in how the key is specified.
In the plain C<pv> form, the key is a C language NUL-terminated string.
In the C<pvs> form, the key is a C language string literal.
In the C<pvn> form, an additional parameter, C<keylen>, specifies the length of
the string, which hence, may contain embedded-NUL characters.
In the C<sv> form, C<*key> is an SV, and the key is the PV extracted from that.
using C<L</SvPV_const>>.
C<hash> is a precomputed hash of the key string, or zero if it has not been
precomputed. This parameter is omitted from the C<pvs> form, as it is computed
automatically at compile time.
The only flag currently used from the C<flags> parameter is C<COPHH_KEY_UTF8>.
It is illegal to set this in the C<sv> form. In the C<pv*> forms, it specifies
whether the key octets are interpreted as UTF-8 (if set) or as Latin-1 (if
cleared). The C<sv> form uses the underlying SV to determine the UTF-8ness of
the octets.
=cut
*/
#define cophh_exists_pvn(cophh, key, keylen, hash, flags) \
cBOOL(Perl_refcounted_he_fetch_pvn(aTHX_ cophh, key, keylen, hash, flags | COPHH_EXISTS))
#define cophh_exists_pvs(cophh, key, flags) \
cBOOL(Perl_refcounted_he_fetch_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, flags | COPHH_EXISTS))
#define cophh_exists_pv(cophh, key, hash, flags) \
cBOOL(Perl_refcounted_he_fetch_pv(aTHX_ cophh, key, hash, flags | COPHH_EXISTS))
#define cophh_exists_sv(cophh, key, hash, flags) \
cBOOL(Perl_refcounted_he_fetch_sv(aTHX_ cophh, key, hash, flags | COPHH_EXISTS))
/*
=for apidoc Amx|HV *|cophh_2hv|const COPHH *cophh|U32 flags
Generates and returns a standard Perl hash representing the full set of
key/value pairs in the cop hints hash C<cophh>. C<flags> is currently
unused and must be zero.
=cut
*/
#define cophh_2hv(cophh, flags) \
Perl_refcounted_he_chain_2hv(aTHX_ cophh, flags)
/*
=for apidoc Amx|COPHH *|cophh_copy|COPHH *cophh
Make and return a complete copy of the cop hints hash C<cophh>.
=cut
*/
#define cophh_copy(cophh) Perl_refcounted_he_inc(aTHX_ cophh)
/*
=for apidoc Amx|void|cophh_free|COPHH *cophh
Discard the cop hints hash C<cophh>, freeing all resources associated
with it.
=cut
*/
#define cophh_free(cophh) Perl_refcounted_he_free(aTHX_ cophh)
/*
=for apidoc Amx|COPHH *|cophh_new_empty
Generate and return a fresh cop hints hash containing no entries.
=cut
*/
#define cophh_new_empty() ((COPHH *)NULL)
/*
=for apidoc Amx|COPHH *|cophh_store_pv |COPHH *cophh|const char *key |U32 hash|SV *value|U32 flags
=for apidoc_item|COPHH *|cophh_store_pvn|COPHH *cophh|const char *key|STRLEN keylen|U32 hash|SV *value|U32 flags
=for apidoc_item|COPHH *|cophh_store_pvs|COPHH *cophh| "key" |SV *value|U32 flags
=for apidoc_item|COPHH *|cophh_store_sv |COPHH *cophh| SV *key |U32 hash|SV *value|U32 flags
These store a value, associated with a key, in the cop hints hash C<cophh>,
and return the modified hash. The returned hash pointer is in general
not the same as the hash pointer that was passed in. The input hash is
consumed by the function, and the pointer to it must not be subsequently
used. Use L</cophh_copy> if you need both hashes.
C<value> is the scalar value to store for this key. C<value> is copied
by these functions, which thus do not take ownership of any reference
to it, and hence later changes to the scalar will not be reflected in the value
visible in the cop hints hash. Complex types of scalar will not be stored with
referential integrity, but will be coerced to strings.
The forms differ in how the key is specified. In all forms, the key is pointed
to by C<key>.
In the plain C<pv> form, the key is a C language NUL-terminated string.
In the C<pvs> form, the key is a C language string literal.
In the C<pvn> form, an additional parameter, C<keylen>, specifies the length of
the string, which hence, may contain embedded-NUL characters.
In the C<sv> form, C<*key> is an SV, and the key is the PV extracted from that.
using C<L</SvPV_const>>.
C<hash> is a precomputed hash of the key string, or zero if it has not been
precomputed. This parameter is omitted from the C<pvs> form, as it is computed
automatically at compile time.
The only flag currently used from the C<flags> parameter is C<COPHH_KEY_UTF8>.
It is illegal to set this in the C<sv> form. In the C<pv*> forms, it specifies
whether the key octets are interpreted as UTF-8 (if set) or as Latin-1 (if
cleared). The C<sv> form uses the underlying SV to determine the UTF-8ness of
the octets.
=cut
*/
#define cophh_store_pvn(cophh, key, keylen, hash, value, flags) \
Perl_refcounted_he_new_pvn(aTHX_ cophh, key, keylen, hash, value, flags)
#define cophh_store_pvs(cophh, key, value, flags) \
Perl_refcounted_he_new_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, value, flags)
#define cophh_store_pv(cophh, key, hash, value, flags) \
Perl_refcounted_he_new_pv(aTHX_ cophh, key, hash, value, flags)
#define cophh_store_sv(cophh, key, hash, value, flags) \
Perl_refcounted_he_new_sv(aTHX_ cophh, key, hash, value, flags)
/*
=for apidoc Amx|COPHH *|cophh_delete_pv |COPHH *cophh|const char *key |U32 hash|U32 flags
=for apidoc_item|COPHH *|cophh_delete_pvn|COPHH *cophh|const char *key|STRLEN keylen|U32 hash|U32 flags
=for apidoc_item|COPHH *|cophh_delete_pvs|COPHH *cophh| "key" |U32 flags
=for apidoc_item|COPHH *|cophh_delete_sv |COPHH *cophh| SV *key |U32 hash|U32 flags
These delete a key and its associated value from the cop hints hash C<cophh>,
and return the modified hash. The returned hash pointer is in general
not the same as the hash pointer that was passed in. The input hash is
consumed by the function, and the pointer to it must not be subsequently
used. Use L</cophh_copy> if you need both hashes.
The forms differ in how the key is specified. In all forms, the key is pointed
to by C<key>.
In the plain C<pv> form, the key is a C language NUL-terminated string.
In the C<pvs> form, the key is a C language string literal.
In the C<pvn> form, an additional parameter, C<keylen>, specifies the length of
the string, which hence, may contain embedded-NUL characters.
In the C<sv> form, C<*key> is an SV, and the key is the PV extracted from that.
using C<L</SvPV_const>>.
C<hash> is a precomputed hash of the key string, or zero if it has not been
precomputed. This parameter is omitted from the C<pvs> form, as it is computed
automatically at compile time.
The only flag currently used from the C<flags> parameter is C<COPHH_KEY_UTF8>.
It is illegal to set this in the C<sv> form. In the C<pv*> forms, it specifies
whether the key octets are interpreted as UTF-8 (if set) or as Latin-1 (if
cleared). The C<sv> form uses the underlying SV to determine the UTF-8ness of
the octets.
=cut
*/
#define cophh_delete_pvn(cophh, key, keylen, hash, flags) \
Perl_refcounted_he_new_pvn(aTHX_ cophh, key, keylen, hash, \
(SV *)NULL, flags)
#define cophh_delete_pvs(cophh, key, flags) \
Perl_refcounted_he_new_pvn(aTHX_ cophh, STR_WITH_LEN(key), 0, \
(SV *)NULL, flags)
#define cophh_delete_pv(cophh, key, hash, flags) \
Perl_refcounted_he_new_pv(aTHX_ cophh, key, hash, (SV *)NULL, flags)
#define cophh_delete_sv(cophh, key, hash, flags) \
Perl_refcounted_he_new_sv(aTHX_ cophh, key, hash, (SV *)NULL, flags)
#include "mydtrace.h"
/* keep in sync with feature.h (which will complain if this is out of sync)
*/
#define COP_FEATURE_SIZE 1
/* make this a struct so we can copy the feature bits with assignment */
struct cop_feature_t {
U32 bits[COP_FEATURE_SIZE];
};
struct cop {
BASEOP
/* On LP64 putting this here takes advantage of the fact that BASEOP isn't
an exact multiple of 8 bytes to save structure padding. */
line_t cop_line; /* line # of this command */
/* label for this construct is now stored in cop_hints_hash */
#ifdef USE_ITHREADS
PADOFFSET cop_stashoff; /* offset into PL_stashpad, for the
package the line was compiled in */
char * cop_file; /* rcpv containing name of file this command is from */
#else
HV * cop_stash; /* package line was compiled in */
GV * cop_filegv; /* name of GV file this command is from */
#endif
U32 cop_hints; /* hints bits from pragmata */
U32 cop_seq; /* parse sequence number */
char * cop_warnings; /* Lexical warnings bitmask vector.
Refcounted shared copy of ${^WARNING_BITS}.
This pointer either points at one of the
magic values for warnings, or it points
at a buffer constructed with rcpv_new().
Use the RCPV_LEN() macro to get its length.
*/
/* compile time state of %^H. See the comment in op.c for how this is
used to recreate a hash to return from caller. */
COPHH * cop_hints_hash;
/*
How these flags are stored is subject to change without
notice. Use the macros to test for features.
*/
struct cop_feature_t cop_features;
};
/*
=for apidoc Am|const char *|CopFILE|const COP * c
Returns the name of the file associated with the C<COP> C<c>
=for apidoc Am|const char *|CopFILE_LEN|const COP * c
Returns the length of the file associated with the C<COP> C<c>
=for apidoc Am|line_t|CopLINE|const COP * c
Returns the line number in the source code associated with the C<COP> C<c>
=for apidoc Am|AV *|CopFILEAV|const COP * c
Returns the AV associated with the C<COP> C<c>, creating it if necessary.
=for apidoc Am|AV *|CopFILEAVn|const COP * c
Returns the AV associated with the C<COP> C<c>, returning NULL if it
doesn't already exist.
=for apidoc Am|SV *|CopFILESV|const COP * c
Returns the SV associated with the C<COP> C<c>
=for apidoc Am|void|CopFILE_set|COP * c|const char * pv
=for apidoc_item|void|CopFILE_setn|COP * c|const char * pv|STRLEN len
These each make C<pv> the name of the file associated with the C<COP> C<c>.
In the plain C<CopFILE_set> form, C<pv> is a C language NUL-terminated string.
In C<CopFILE_setn>, C<len> is the length of C<pv>, which hence may contain
embedded NUL characters.
=for apidoc Am|void|CopFILE_copy|COP * dst|COP * src
Efficiently copies the cop file name from one COP to another. Wraps
the required logic to do a refcounted copy under threads or not.
=for apidoc Am|void|CopFILE_free|COP * c
Frees the file data in a cop. Under the hood this is a refcounting
operation.
=for apidoc Am|GV *|CopFILEGV|const COP * c
Returns the GV associated with the C<COP> C<c>
=for apidoc CopFILEGV_set
Available only on unthreaded perls. Makes C<pv> the name of the file
associated with the C<COP> C<c>
=for apidoc Am|HV *|CopSTASH|const COP * c
Returns the stash associated with C<c>.
=for apidoc Am|bool|CopSTASH_eq|const COP * c|const HV * hv
Returns a boolean as to whether or not C<hv> is the stash associated with C<c>.
=for apidoc Am|bool|CopSTASH_set|COP * c|HV * hv
Set the stash associated with C<c> to C<hv>.
=for apidoc Am|char *|CopSTASHPV|const COP * c
Returns the package name of the stash associated with C<c>, or C<NULL> if no
associated stash
=for apidoc Am|void|CopSTASHPV_set|COP * c|const char * pv
Set the package name of the stash associated with C<c>, to the NUL-terminated C
string C<p>, creating the package if necessary.
=cut
*/
/*
=for apidoc Am|RCPV *|RCPVx|char *pv
Returns the RCPV structure (struct rcpv) for a refcounted
string pv created with C<rcpv_new()>.
No checks are performed to ensure that C<pv> was actually allocated
with C<rcpv_new()>, it is the callers responsibility to ensure that
this is the case.
=for apidoc Am|RCPV *|RCPV_REFCOUNT|char *pv
Returns the refcount for a pv created with C<rcpv_new()>.
No checks are performed to ensure that C<pv> was actually allocated
with C<rcpv_new()>, it is the callers responsibility to ensure that
this is the case.
=for apidoc Am|RCPV *|RCPV_REFCNT_inc|char *pv
Increments the refcount for a C<char *> pointer which was created
with a call to C<rcpv_new()>. Same as calling rcpv_copy().
No checks are performed to ensure that C<pv> was actually allocated
with C<rcpv_new()>, it is the callers responsibility to ensure that
this is the case.
=for apidoc Am|RCPV *|RCPV_REFCNT_dec|char *pv
Decrements the refcount for a C<char *> pointer which was created
with a call to C<rcpv_new()>. Same as calling rcpv_free().
No checks are performed to ensure that C<pv> was actually allocated
with C<rcpv_new()>, it is the callers responsibility to ensure that
this is the case.
=for apidoc Am|RCPV *|RCPV_LEN|char *pv
Returns the length of a pv created with C<rcpv_new()>.
Note that this reflects the length of the string from the callers
point of view, it does not include the mandatory null which is
always injected at the end of the string by rcpv_new().
No checks are performed to ensure that C<pv> was actually allocated
with C<rcpv_new()>, it is the callers responsibility to ensure that
this is the case.
=cut
*/
struct rcpv {
STRLEN refcount; /* UV would mean a 64 refcnt on
32 bit builds with -Duse64bitint */
STRLEN len; /* length of string including mandatory
null byte at end */
char pv[1];
};
typedef struct rcpv RCPV;
#define RCPVf_USE_STRLEN (1 << 0)
#define RCPVf_NO_COPY (1 << 1)
#define RCPVf_ALLOW_EMPTY (1 << 2)
#define RCPVx(pv_arg) ((RCPV *)((pv_arg) - STRUCT_OFFSET(struct rcpv, pv)))
#define RCPV_REFCOUNT(pv) (RCPVx(pv)->refcount)
#define RCPV_LEN(pv) (RCPVx(pv)->len-1) /* len always includes space for a null */
#define RCPV_REFCNT_inc(pv) rcpv_copy(pv)
#define RCPV_REFCNT_dec(pv) rcpv_free(pv)
#ifdef USE_ITHREADS
# define CopFILE(c) ((c)->cop_file)
# define CopFILE_LEN(c) (CopFILE(c) ? RCPV_LEN(CopFILE(c)) : 0)
# define CopFILEGV(c) (CopFILE(c) \
? gv_fetchfile(CopFILE(c)) : NULL)
# define CopFILE_set_x(c,pv) ((c)->cop_file = rcpv_new((pv),0,RCPVf_USE_STRLEN))
# define CopFILE_setn_x(c,pv,l) ((c)->cop_file = rcpv_new((pv),(l),0))
# define CopFILE_free_x(c) ((c)->cop_file = rcpv_free((c)->cop_file))
# define CopFILE_copy_x(dst,src) ((dst)->cop_file = rcpv_copy((src)->cop_file))
/* change condition to 1 && to enable this debugging */
# define CopFILE_debug(c,t,rk) \
if (0 && (c)->cop_file) \
PerlIO_printf(Perl_debug_log, \
"%-14s THX:%p OP:%p PV:%p rc: " \
"%6zu fn: '%.*s' at %s line %d\n", \
(t), aTHX, (c), (c)->cop_file, \
RCPV_REFCOUNT((c)->cop_file)-rk, \
(int)RCPV_LEN((c)->cop_file), \
(c)->cop_file,__FILE__,__LINE__) \
# define CopFILE_set(c,pv) \
STMT_START { \
CopFILE_set_x(c,pv); \
CopFILE_debug(c,"CopFILE_set", 0); \
} STMT_END
# define CopFILE_setn(c,pv,l) \
STMT_START { \
CopFILE_setn_x(c,pv,l); \
CopFILE_debug(c,"CopFILE_setn", 0); \
} STMT_END
# define CopFILE_copy(dst,src) \
STMT_START { \
CopFILE_copy_x((dst),(src)); \
CopFILE_debug((dst),"CopFILE_copy", 0); \
} STMT_END
# define CopFILE_free(c) \
STMT_START { \
CopFILE_debug((c),"CopFILE_free", 1); \
CopFILE_free_x(c); \
} STMT_END
# define CopFILESV(c) (CopFILE(c) \
? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
# define CopFILEAV(c) (CopFILE(c) \
? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
# define CopFILEAVx(c) (assert_(CopFILE(c)) \
GvAV(gv_fetchfile(CopFILE(c))))
# define CopFILEAVn(c) (cop_file_avn(c))
# define CopSTASH(c) PL_stashpad[(c)->cop_stashoff]
# define CopSTASH_set(c,hv) ((c)->cop_stashoff = (hv) \
? alloccopstash(hv) \
: 0)
#else /* Above: yes threads; Below no threads */
# define CopFILEGV(c) ((c)->cop_filegv)
# define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
# define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
# define CopFILE_copy(dst,src) CopFILEGV_set((dst),CopFILEGV(src))
# define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0))
# define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
# ifdef DEBUGGING
# define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c)))
# else
# define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
# endif
# define CopFILEAVn(c) (CopFILEGV(c) ? GvAVn(CopFILEGV(c)) : NULL)
# define CopFILE(c) (CopFILEGV(c) /* +2 for '_<' */ \
? GvNAME(CopFILEGV(c))+2 : NULL)
# define CopFILE_LEN(c) (CopFILEGV(c) /* -2 for '_<' */ \
? GvNAMELEN(CopFILEGV(c))-2 : 0)
# define CopSTASH(c) ((c)->cop_stash)
# define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL))
#endif /* USE_ITHREADS */
/* A cache of the last CopFILE char *, that was turned into a HEK*, probably
to be stored in a GP*. This is a cache. HEK* might be stale, always compare
it to the current CopFILE. This cache prevents alot of repetitive work
in Perl_newGP(), PERL_HASH(), share_hek_flags(), and HvARRAY(PL_strtab). */
struct cop_lastfile {
char * copfile_unsafe; /* unsafe to deref, ptr that was used to create
this HEK*, the ptr was originally from CopFILE(PL_curcop).
The copfile_unsafe does not have any ownership or any RC on the ptr in it.
It could be freed by now. char * copfile_unsafe is only used as a ==
against the current char * (which has an undefined allocator), to skip
the memcmp(). The == will likely pass b/c of the RCPV API. RCPV is an
internals detail we don't know about. */
HEK * cached_file; /* This field owns a RC +1 HEK*. If old HEK*
is not NULL, it must be --ed. New HEK* must be ++ed. */
};
#define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL)
/* cop_stash is not refcounted */
#define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
#define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
#define CopHINTHASH_get(c) ((COPHH*)((c)->cop_hints_hash))
#define CopHINTHASH_set(c,h) ((c)->cop_hints_hash = (h))
#define CopFEATURES_setfrom(dst, src) ((dst)->cop_features = (src)->cop_features)
/*
=for apidoc Am|SV *|cop_hints_fetch_pv |const COP *cop|const char *key |U32 hash|U32 flags
=for apidoc_item|SV *|cop_hints_fetch_pvn|const COP *cop|const char *key|STRLEN keylen|U32 hash|U32 flags
=for apidoc_item|SV *|cop_hints_fetch_pvs|const COP *cop| "key" |U32 flags
=for apidoc_item|SV *|cop_hints_fetch_sv |const COP *cop| SV *key |U32 hash|U32 flags
These look up the hint entry in the cop C<cop> with the key specified by
C<key> (and C<keylen> in the C<pvn> form), returning that value as a mortal
scalar copy, or C<&PL_sv_placeholder> if there is no value associated with the
key.
The forms differ in how the key is specified.
In the plain C<pv> form, the key is a C language NUL-terminated string.
In the C<pvs> form, the key is a C language string literal.
In the C<pvn> form, an additional parameter, C<keylen>, specifies the length of
the string, which hence, may contain embedded-NUL characters.
In the C<sv> form, C<*key> is an SV, and the key is the PV extracted from that.
using C<L</SvPV_const>>.
C<hash> is a precomputed hash of the key string, or zero if it has not been
precomputed. This parameter is omitted from the C<pvs> form, as it is computed
automatically at compile time.
The only flag currently used from the C<flags> parameter is C<COPHH_KEY_UTF8>.
It is illegal to set this in the C<sv> form. In the C<pv*> forms, it specifies
whether the key octets are interpreted as UTF-8 (if set) or as Latin-1 (if
cleared). The C<sv> form uses the underlying SV to determine the UTF-8ness of
the octets.
=cut
*/
#define cop_hints_fetch_pvn(cop, key, keylen, hash, flags) \
cophh_fetch_pvn(CopHINTHASH_get(cop), key, keylen, hash, flags)
#define cop_hints_fetch_pvs(cop, key, flags) \
cophh_fetch_pvs(CopHINTHASH_get(cop), key, flags)
#define cop_hints_fetch_pv(cop, key, hash, flags) \
cophh_fetch_pv(CopHINTHASH_get(cop), key, hash, flags)
#define cop_hints_fetch_sv(cop, key, hash, flags) \
cophh_fetch_sv(CopHINTHASH_get(cop), key, hash, flags)
/*
=for apidoc Am|bool|cop_hints_exists_pv |const COP *cop|const char *key|U32 hash |U32 flags
=for apidoc_item|bool|cop_hints_exists_pvn|const COP *cop|const char *key|STRLEN keylen|U32 hash|U32 flags
=for apidoc_item|bool|cop_hints_exists_pvs|const COP *cop| "key" |U32 flags
=for apidoc_item|bool|cop_hints_exists_sv |const COP *cop| SV *key |U32 hash|U32 flags
These look up the hint entry in the cop C<cop> with the key specified by
C<key> (and C<keylen> in the C<pvn> form), returning true if a value exists,
and false otherwise.
The forms differ in how the key is specified. In all forms, the key is pointed
to by C<key>.
In the plain C<pv> form, the key is a C language NUL-terminated string.
In the C<pvs> form, the key is a C language string literal.
In the C<pvn> form, an additional parameter, C<keylen>, specifies the length of
the string, which hence, may contain embedded-NUL characters.
In the C<sv> form, C<*key> is an SV, and the key is the PV extracted from that.
using C<L</SvPV_const>>.
C<hash> is a precomputed hash of the key string, or zero if it has not been
precomputed. This parameter is omitted from the C<pvs> form, as it is computed
automatically at compile time.
The only flag currently used from the C<flags> parameter is C<COPHH_KEY_UTF8>.
It is illegal to set this in the C<sv> form. In the C<pv*> forms, it specifies
whether the key octets are interpreted as UTF-8 (if set) or as Latin-1 (if
cleared). The C<sv> form uses the underlying SV to determine the UTF-8ness of
the octets.
=cut
*/
#define cop_hints_exists_pvn(cop, key, keylen, hash, flags) \
cophh_exists_pvn(CopHINTHASH_get(cop), key, keylen, hash, flags)
#define cop_hints_exists_pvs(cop, key, flags) \
cophh_exists_pvs(CopHINTHASH_get(cop), key, flags)
#define cop_hints_exists_pv(cop, key, hash, flags) \
cophh_exists_pv(CopHINTHASH_get(cop), key, hash, flags)
#define cop_hints_exists_sv(cop, key, hash, flags) \
cophh_exists_sv(CopHINTHASH_get(cop), key, hash, flags)
/*
=for apidoc Am|HV *|cop_hints_2hv|const COP *cop|U32 flags
Generates and returns a standard Perl hash representing the full set of
hint entries in the cop C<cop>. C<flags> is currently unused and must
be zero.
=cut
*/
#define cop_hints_2hv(cop, flags) \
cophh_2hv(CopHINTHASH_get(cop), flags)
/*
=for apidoc Am|const char *|CopLABEL |COP *const cop
=for apidoc_item|const char *|CopLABEL_len |COP *const cop|STRLEN *len
=for apidoc_item|const char *|CopLABEL_len_flags|COP *const cop|STRLEN *len|U32 *flags
These return the label attached to a cop.
C<CopLABEL_len> and C<CopLABEL_len_flags> additionally store the number of
bytes comprising the returned label into C<*len>.
C<CopLABEL_len_flags> additionally returns the UTF-8ness of the returned label,
by setting C<*flags> to 0 or C<SVf_UTF8>.
=cut
*/
#define CopLABEL(c) Perl_cop_fetch_label(aTHX_ (c), NULL, NULL)
#define CopLABEL_len(c,len) Perl_cop_fetch_label(aTHX_ (c), len, NULL)
#define CopLABEL_len_flags(c,len,flags) Perl_cop_fetch_label(aTHX_ (c), len, flags)
#define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
#define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
#define CopLINE(c) ((c)->cop_line)
#define CopLINE_inc(c) (++CopLINE(c))
#define CopLINE_dec(c) (--CopLINE(c))
#define CopLINE_set(c,l) (CopLINE(c) = (l))
/* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
#define OutCopFILE(c) CopFILE(c)
#define CopHINTS_get(c) ((c)->cop_hints + 0)
#define CopHINTS_set(c, h) STMT_START { \
(c)->cop_hints = (h); \
} STMT_END
/*
* Here we have some enormously heavy (or at least ponderous) wizardry.
*/
/* subroutine context */
struct block_sub {
OP * retop; /* op to execute on exit from sub */
I32 old_cxsubix; /* previous value of si_cxsubix */
/* Above here is the same for sub, format and eval. */
PAD *prevcomppad; /* the caller's PL_comppad */
CV * cv;
/* Above here is the same for sub and format. */
I32 olddepth;
AV *savearray;
};
/* format context */
struct block_format {
OP * retop; /* op to execute on exit from sub */
I32 old_cxsubix; /* previous value of si_cxsubix */
/* Above here is the same for sub, format and eval. */
PAD *prevcomppad; /* the caller's PL_comppad */
CV * cv;
/* Above here is the same for sub and format. */
GV * gv;
GV * dfoutgv;
};
/* return a pointer to the current context */
#define CX_CUR() (&cxstack[cxstack_ix])
/* free all savestack items back to the watermark of the specified context */
#define CX_LEAVE_SCOPE(cx) LEAVE_SCOPE(cx->blk_oldsaveix)
#ifdef DEBUGGING
/* on debugging builds, poison cx afterwards so we know no code
* uses it - because after doing cxstack_ix--, any ties, exceptions etc
* may overwrite the current stack frame */
# define CX_POP(cx) \
assert(CX_CUR() == cx); \
cxstack_ix--; \
cx = NULL;
#else
# define CX_POP(cx) cxstack_ix--;
#endif
#define CX_PUSHSUB_GET_LVALUE_MASK(func) \
/* If the context is indeterminate, then only the lvalue */ \
/* flags that the caller also has are applicable. */ \
( \
(PL_op->op_flags & OPf_WANT) \
? OPpENTERSUB_LVAL_MASK \
: !(PL_op->op_private & OPpENTERSUB_LVAL_MASK) \
? 0 : (U8)func(aTHX) \
)
/* Restore old @_ */
#define CX_POP_SAVEARRAY(cx) \
STMT_START { \
AV *cx_pop_savearray_av = GvAV(PL_defgv); \
GvAV(PL_defgv) = cx->blk_sub.savearray; \
cx->blk_sub.savearray = NULL; \
SvREFCNT_dec(cx_pop_savearray_av); \
} STMT_END
/* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
* leave any (a fast av_clear(ary), basically).
* New code should probably be using Perl_clear_defarray_simple()
* and/or Perl_clear_defarray()
*/
#define CLEAR_ARGARRAY(ary) \
STMT_START { \
AvFILLp(ary) = -1; \
av_remove_offset(ary); \
} STMT_END
/* eval context */
struct block_eval {
OP * retop; /* op to execute on exit from eval */
I32 old_cxsubix; /* previous value of si_cxsubix */
/* Above here is the same for sub, format and eval. */
SV * old_namesv;
OP * old_eval_root;
SV * cur_text;
CV * cv;
JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
};
/* If we ever need more than 512 op types, change the shift from 7.
blku_gimme is actually also only 2 bits, so could be merged with something.
*/
/* blk_u16 bit usage for eval contexts: */
#define CxOLD_IN_EVAL(cx) (((cx)->blk_u16) & 0x3F) /* saved PL_in_eval */
#define CxEVAL_TXT_REFCNTED(cx) (((cx)->blk_u16) & 0x40) /* cur_text rc++ */
#define CxOLD_OP_TYPE(cx) (((cx)->blk_u16) >> 7) /* type of eval op */
/* loop context */
struct block_loop {
LOOP * my_op; /* My op, that contains redo, next and last ops. */
union { /* different ways of locating the iteration variable */
SV **svp; /* for lexicals: address of pad slot */
GV *gv; /* for package vars */
} itervar_u;
SV *itersave; /* the original iteration var */
union {
struct { /* CXt_LOOP_ARY, C<for (@ary)> */
AV *ary; /* array being iterated over */
IV ix; /* index relative to base of array */
} ary;
struct { /* CXt_LOOP_LIST, C<for (list)> */
SSize_t basesp; /* first element of list on stack */
IV ix; /* index relative to basesp */
} stack;
struct { /* CXt_LOOP_LAZYIV, C<for (1..9)> */
IV cur;
IV end;
} lazyiv;
struct { /* CXt_LOOP_LAZYSV C<for ('a'..'z')> */
SV * cur;
SV * end; /* maximum value (or minimum in reverse) */
} lazysv;
} state_u;
#ifdef USE_ITHREADS
PAD *oldcomppad; /* needed to map itervar_u.svp during thread clone */
#endif
};
#define CxITERVAR(c) \
(CxPADLOOP(c) \
? (c)->blk_loop.itervar_u.svp \
: ((c)->cx_type & CXp_FOR_GV) \
? &GvSV((c)->blk_loop.itervar_u.gv) \
: (SV **)&(c)->blk_loop.itervar_u.gv)
#define CxLABEL(c) (CopLABEL((c)->blk_oldcop))
#define CxLABEL_len(c,len) (CopLABEL_len((c)->blk_oldcop, len))
#define CxLABEL_len_flags(c,len,flags) ((const char *)CopLABEL_len_flags((c)->blk_oldcop, len, flags))
#define CxHASARGS(c) (((c)->cx_type & CXp_HASARGS) == CXp_HASARGS)
/* CxLVAL(): the lval flags of the call site: the relevant flag bits from
* the op_private field of the calling pp_entersub (or its caller's caller
* if the caller's lvalue context isn't known):
* OPpLVAL_INTRO: sub used in lvalue context, e.g. f() = 1;
* OPpENTERSUB_INARGS (in conjunction with OPpLVAL_INTRO): the
* function is being used as a sub arg or as a referent, e.g.
* g(...,f(),...) or $r = \f()
* OPpDEREF: 2-bit mask indicating e.g. f()->[0].