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perl.c
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perl.c
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/* perl.c
*
* Copyright (C) 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.
*
*/
/*
* A ship then new they built for him
* of mithril and of elven-glass
* --from Bilbo's song of Eärendil
*
* [p.236 of _The Lord of the Rings_, II/i: "Many Meetings"]
*/
/* This file contains the top-level functions that are used to create, use
* and destroy a perl interpreter, plus the functions used by XS code to
* call back into perl. Note that it does not contain the actual main()
* function of the interpreter; that can be found in perlmain.c
*/
#include "EXTERN.h"
#define PERL_IN_PERL_C
#include "perl.h"
#include "patchlevel.h" /* for local_patches */
#include "XSUB.h"
#ifdef NETWARE
#include "nwutil.h"
#endif
/* XXX If this causes problems, set i_unistd=undef in the hint file. */
#ifdef I_UNISTD
#include <unistd.h>
#endif
#ifdef __BEOS__
# define HZ 1000000
#endif
#ifndef HZ
# ifdef CLK_TCK
# define HZ CLK_TCK
# else
# define HZ 60
# endif
#endif
#if !defined(STANDARD_C) && !defined(HAS_GETENV_PROTOTYPE) && !defined(PERL_MICRO)
char *getenv (char *); /* Usually in <stdlib.h> */
#endif
static I32 read_e_script(pTHX_ int idx, SV *buf_sv, int maxlen);
#ifdef SETUID_SCRIPTS_ARE_SECURE_NOW
/* Drop everything. Heck, don't even try to call it */
# define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) NOOP
#else
/* Drop almost everything */
# define validate_suid(validarg, scriptname, fdscript, suidscript, linestr_sv, rsfp) S_validate_suid(aTHX_ rsfp)
#endif
#define CALL_BODY_EVAL(myop) \
if (PL_op == (myop)) \
PL_op = PL_ppaddr[OP_ENTEREVAL](aTHX); \
if (PL_op) \
CALLRUNOPS(aTHX);
#define CALL_BODY_SUB(myop) \
if (PL_op == (myop)) \
PL_op = PL_ppaddr[OP_ENTERSUB](aTHX); \
if (PL_op) \
CALLRUNOPS(aTHX);
static void
S_init_tls_and_interp(PerlInterpreter *my_perl)
{
dVAR;
if (!PL_curinterp) {
PERL_SET_INTERP(my_perl);
#ifdef PERL_IMPLICIT_CONTEXT
MUTEX_INIT(&PL_my_ctx_mutex);
# endif
}
PERL_SET_THX(my_perl);
}
/* these implement the PERL_SYS_INIT, PERL_SYS_INIT3, PERL_SYS_TERM macros */
void
Perl_sys_init(int* argc, char*** argv)
{
dVAR;
PERL_ARGS_ASSERT_SYS_INIT;
PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
PERL_UNUSED_ARG(argv);
PERL_SYS_INIT_BODY(argc, argv);
}
void
Perl_sys_init3(int* argc, char*** argv, char*** env)
{
dVAR;
PERL_ARGS_ASSERT_SYS_INIT3;
PERL_UNUSED_ARG(argc); /* may not be used depending on _BODY macro */
PERL_UNUSED_ARG(argv);
PERL_UNUSED_ARG(env);
PERL_SYS_INIT3_BODY(argc, argv, env);
}
void
Perl_sys_term()
{
dVAR;
if (!PL_veto_cleanup) {
PERL_SYS_TERM_BODY();
}
}
#ifdef PERL_IMPLICIT_SYS
PerlInterpreter *
perl_alloc_using(struct IPerlMem* ipM, struct IPerlMem* ipMS,
struct IPerlMem* ipMP, struct IPerlEnv* ipE,
struct IPerlStdIO* ipStd, struct IPerlLIO* ipLIO,
struct IPerlDir* ipD, struct IPerlSock* ipS,
struct IPerlProc* ipP)
{
PerlInterpreter *my_perl;
PERL_ARGS_ASSERT_PERL_ALLOC_USING;
/* Newx() needs interpreter, so call malloc() instead */
my_perl = (PerlInterpreter*)(*ipM->pMalloc)(ipM, sizeof(PerlInterpreter));
S_init_tls_and_interp(my_perl);
Zero(my_perl, 1, PerlInterpreter);
PL_Mem = ipM;
PL_MemShared = ipMS;
PL_MemParse = ipMP;
PL_Env = ipE;
PL_StdIO = ipStd;
PL_LIO = ipLIO;
PL_Dir = ipD;
PL_Sock = ipS;
PL_Proc = ipP;
INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
return my_perl;
}
#else
/*
=head1 Embedding Functions
=for apidoc perl_alloc
Allocates a new Perl interpreter. See L<perlembed>.
=cut
*/
PerlInterpreter *
perl_alloc(void)
{
PerlInterpreter *my_perl;
/* Newx() needs interpreter, so call malloc() instead */
my_perl = (PerlInterpreter*)PerlMem_malloc(sizeof(PerlInterpreter));
S_init_tls_and_interp(my_perl);
#ifndef PERL_TRACK_MEMPOOL
return (PerlInterpreter *) ZeroD(my_perl, 1, PerlInterpreter);
#else
Zero(my_perl, 1, PerlInterpreter);
INIT_TRACK_MEMPOOL(PL_memory_debug_header, my_perl);
return my_perl;
#endif
}
#endif /* PERL_IMPLICIT_SYS */
/*
=for apidoc perl_construct
Initializes a new Perl interpreter. See L<perlembed>.
=cut
*/
void
perl_construct(pTHXx)
{
dVAR;
PERL_ARGS_ASSERT_PERL_CONSTRUCT;
#ifdef MULTIPLICITY
init_interp();
PL_perl_destruct_level = 1;
#else
PERL_UNUSED_ARG(my_perl);
if (PL_perl_destruct_level > 0)
init_interp();
#endif
PL_curcop = &PL_compiling; /* needed by ckWARN, right away */
VALGRIND_CREATE_MEMPOOL(&PL_sv_arenaroot, 0, 0);
/* set read-only and try to insure than we wont see REFCNT==0
very often */
SvREADONLY_on(&PL_sv_undef);
SvREFCNT(&PL_sv_undef) = (~(U32)0)/2;
sv_setpv(&PL_sv_no,PL_No);
/* value lookup in void context - happens to have the side effect
of caching the numeric forms. However, as &PL_sv_no doesn't contain
a string that is a valid numer, we have to turn the public flags by
hand: */
SvNV(&PL_sv_no);
SvIV(&PL_sv_no);
SvIOK_on(&PL_sv_no);
SvNOK_on(&PL_sv_no);
SvREADONLY_on(&PL_sv_no);
SvREFCNT(&PL_sv_no) = (~(U32)0)/2;
sv_setpv(&PL_sv_yes,PL_Yes);
SvNV(&PL_sv_yes);
SvIV(&PL_sv_yes);
SvREADONLY_on(&PL_sv_yes);
SvREFCNT(&PL_sv_yes) = (~(U32)0)/2;
SvREADONLY_on(&PL_sv_placeholder);
SvREFCNT(&PL_sv_placeholder) = (~(U32)0)/2;
PL_sighandlerp = (Sighandler_t) Perl_sighandler;
#ifdef PERL_USES_PL_PIDSTATUS
PL_pidstatus = newHV();
#endif
PL_rs = newSVpvs("\n");
init_stacks();
init_ids();
JMPENV_BOOTSTRAP;
STATUS_ALL_SUCCESS;
init_i18nl10n(1);
SET_NUMERIC_STANDARD();
#if defined(LOCAL_PATCH_COUNT)
PL_localpatches = local_patches; /* For possible -v */
#endif
#ifdef HAVE_INTERP_INTERN
sys_intern_init();
#endif
PerlIO_init(aTHX); /* Hook to IO system */
PL_fdpid = newAV(); /* for remembering popen pids by fd */
PL_modglobal = newHV(); /* pointers to per-interpreter module globals */
PL_errors = newSVpvs("");
sv_setpvs(PERL_DEBUG_PAD(0), ""); /* For regex debugging. */
sv_setpvs(PERL_DEBUG_PAD(1), ""); /* ext/re needs these */
sv_setpvs(PERL_DEBUG_PAD(2), ""); /* even without DEBUGGING. */
#ifdef USE_REENTRANT_API
Perl_reentrant_init(aTHX);
#endif
/* Note that strtab is a rather special HV. Assumptions are made
about not iterating on it, and not adding tie magic to it.
It is properly deallocated in perl_destruct() */
PL_strtab = newHV();
HvSHAREKEYS_off(PL_strtab); /* mandatory */
hv_ksplit(PL_strtab, 512);
#if defined(__DYNAMIC__) && (defined(NeXT) || defined(__NeXT__))
_dyld_lookup_and_bind
("__environ", (unsigned long *) &environ_pointer, NULL);
#endif /* environ */
#ifndef PERL_MICRO
# ifdef USE_ENVIRON_ARRAY
PL_origenviron = environ;
# endif
#endif
/* Use sysconf(_SC_CLK_TCK) if available, if not
* available or if the sysconf() fails, use the HZ.
* BeOS has those, but returns the wrong value.
* The HZ if not originally defined has been by now
* been defined as CLK_TCK, if available. */
#if defined(HAS_SYSCONF) && defined(_SC_CLK_TCK) && !defined(__BEOS__)
PL_clocktick = sysconf(_SC_CLK_TCK);
if (PL_clocktick <= 0)
#endif
PL_clocktick = HZ;
PL_stashcache = newHV();
PL_patchlevel = newSVpvs(PERL_VERSION_STRING);
#ifdef HAS_MMAP
if (!PL_mmap_page_size) {
#if defined(HAS_SYSCONF) && (defined(_SC_PAGESIZE) || defined(_SC_MMAP_PAGE_SIZE))
{
SETERRNO(0, SS_NORMAL);
# ifdef _SC_PAGESIZE
PL_mmap_page_size = sysconf(_SC_PAGESIZE);
# else
PL_mmap_page_size = sysconf(_SC_MMAP_PAGE_SIZE);
# endif
if ((long) PL_mmap_page_size < 0) {
if (errno) {
SV * const error = ERRSV;
SvUPGRADE(error, SVt_PV);
Perl_croak(aTHX_ "panic: sysconf: %s", SvPV_nolen_const(error));
}
else
Perl_croak(aTHX_ "panic: sysconf: pagesize unknown");
}
}
#else
# ifdef HAS_GETPAGESIZE
PL_mmap_page_size = getpagesize();
# else
# if defined(I_SYS_PARAM) && defined(PAGESIZE)
PL_mmap_page_size = PAGESIZE; /* compiletime, bad */
# endif
# endif
#endif
if (PL_mmap_page_size <= 0)
Perl_croak(aTHX_ "panic: bad pagesize %" IVdf,
(IV) PL_mmap_page_size);
}
#endif /* HAS_MMAP */
#if defined(HAS_TIMES) && defined(PERL_NEED_TIMESBASE)
PL_timesbase.tms_utime = 0;
PL_timesbase.tms_stime = 0;
PL_timesbase.tms_cutime = 0;
PL_timesbase.tms_cstime = 0;
#endif
PL_hints = DEFAULT_HINTS;
PL_compiling.cop_hints_hash = newHV();
PL_dynamicscope = hvTsv(newHV());
ENTER_named("perl");
}
/*
=for apidoc nothreadhook
Stub that provides thread hook for perl_destruct when there are
no threads.
=cut
*/
int
Perl_nothreadhook(pTHX)
{
PERL_UNUSED_CONTEXT;
return 0;
}
/*
=for apidoc perl_destruct
Shuts down a Perl interpreter. See L<perlembed>.
=cut
*/
int
perl_destruct(pTHXx)
{
dVAR;
VOL signed char destruct_level; /* see possible values in intrpvar.h */
HV *hv;
PERL_ARGS_ASSERT_PERL_DESTRUCT;
#ifndef MULTIPLICITY
PERL_UNUSED_ARG(my_perl);
#endif
/* wait for all pseudo-forked children to finish */
PERL_WAIT_FOR_CHILDREN;
destruct_level = PL_perl_destruct_level;
#ifdef DEBUGGING
{
const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
if (s) {
const int i = atoi(s);
if (destruct_level < i)
destruct_level = i;
}
}
#endif
if (PL_exit_flags & PERL_EXIT_DESTRUCT_END) {
dJMPENV;
int x = 0;
JMPENV_PUSH(x);
PERL_UNUSED_VAR(x);
if (PL_endav && !PL_minus_c)
call_list(PL_scopestack_ix, PL_endav);
JMPENV_POP;
}
LEAVE_named("perl");
FREETMPS;
/* Need to flush since END blocks can produce output */
my_fflush_all();
if (CALL_FPTR(PL_threadhook)(aTHX)) {
/* Threads hook has vetoed further cleanup */
PL_veto_cleanup = TRUE;
return STATUS_EXIT;
}
if (PL_destroyav)
call_destructors();
/* We must account for everything. */
/* Destroy the main CV and syntax tree */
/* Do this now, because destroying ops can cause new SVs to be generated
in Perl_pad_swipe, and when running with -DDEBUG_LEAKING_SCALARS they
PL_curcop to point to a valid op from which the filename structure
member is copied. */
PL_curcop = &PL_compiling;
if (PL_main_root) {
/* ensure comppad/curpad to refer to main's pad */
if (CvPADLIST(PL_main_cv)) {
pad_set_cur_nosave(CvPADLIST(PL_main_cv), 1);
}
ROOTOPcpNULL(PL_main_root);
}
PL_main_start = NULL;
CVcpNULL(PL_main_cv);
PL_dirty = TRUE;
/* Tell PerlIO we are about to tear things apart in case
we have layers which are using resources that should
be cleaned up now.
*/
PerlIO_destruct(aTHX);
if (PL_destroyav)
call_destructors();
/* call exit list functions */
while (PL_exitlistlen-- > 0)
PL_exitlist[PL_exitlistlen].fn(aTHX_ PL_exitlist[PL_exitlistlen].ptr);
Safefree(PL_exitlist);
PL_exitlist = NULL;
PL_exitlistlen = 0;
/* jettison our possibly duplicated environment */
/* if PERL_USE_SAFE_PUTENV is defined environ will not have been copied
* so we certainly shouldn't free it here
*/
#ifndef PERL_MICRO
#if defined(USE_ENVIRON_ARRAY) && !defined(PERL_USE_SAFE_PUTENV)
if (environ != PL_origenviron && !PL_use_safe_putenv)
{
I32 i;
for (i = 0; environ[i]; i++)
safesysfree(environ[i]);
/* Must use safesysfree() when working with environ. */
safesysfree(environ);
environ = PL_origenviron;
}
#endif
#endif /* !PERL_MICRO */
if (destruct_level == 0) {
DEBUG_P(debprofdump());
#if defined(PERLIO_LAYERS)
/* No more IO - including error messages ! */
PerlIO_cleanup(aTHX);
#endif
CopSTASH_free(&PL_compiling);
/* The exit() function will do everything that needs doing. */
return STATUS_EXIT;
}
if (PL_destroyav)
call_destructors();
HVcpNULL(PL_stashcache);
/* unhook hooks which will soon be, or use, destroyed data */
SvREFCNT_dec(PL_errorcreatehook);
PL_errorcreatehook = NULL;
SvREFCNT_dec(PL_warnhook);
PL_warnhook = NULL;
SvREFCNT_dec(PL_diehook);
PL_diehook = NULL;
/* loosen bonds of global variables */
/* XXX can PL_parser still be non-null here? */
if(PL_parser && PL_parser->rsfp) {
(void)PerlIO_close(PL_parser->rsfp);
PL_parser->rsfp = NULL;
}
/* switches */
PL_minus_l = FALSE;
PL_dowarn = G_WARN_OFF;
PL_unsafe = FALSE;
SvREFCNT_dec(PL_patchlevel);
PL_patchlevel = NULL;
if (PL_e_script) {
SvREFCNT_dec(PL_e_script);
PL_e_script = NULL;
}
PL_perldb = 0;
/* magical thingies */
SvREFCNT_dec(PL_ofs_sv); /* $, */
PL_ofs_sv = NULL;
SVcpNULL(PL_rs); /* $/ */
Safefree(PL_osname); /* $^O */
PL_osname = NULL;
HVcpNULL(PL_op_sequence);
SVcpNULL(PL_statname);
/* defgv, aka *_ should be taken care of elsewhere */
/* clean up after study() */
SvREFCNT_dec(PL_lastscream);
PL_lastscream = NULL;
Safefree(PL_screamfirst);
PL_screamfirst = 0;
Safefree(PL_screamnext);
PL_screamnext = 0;
/* float buffer */
Safefree(PL_efloatbuf);
PL_efloatbuf = NULL;
PL_efloatsize = 0;
/* startup and shutdown function lists */
AvREFCNT_dec(PL_endav);
AvREFCNT_dec(PL_checkav);
AVcpNULL(PL_unitcheckav);
AvREFCNT_dec(PL_initav);
PL_endav = NULL;
PL_checkav = NULL;
PL_initav = NULL;
/* shortcuts just get cleared */
HVcpNULL(PL_envhv);
AVcpNULL(PL_includepathav);
HVcpNULL(PL_includedhv);
SVcpNULL(PL_errsv);
HVcpNULL(PL_magicsvhv);
HVcpNULL(PL_hinthv);
HvREFCNT_dec(PL_globalstash);
PL_globalstash = NULL;
PL_argvgv = NULL;
PL_argvoutgv = NULL;
IoREFCNT_dec(PL_stdinio);
PL_stdinio = NULL;
IoREFCNT_dec(PL_stdoutio);
PL_stdoutio = NULL;
IoREFCNT_dec(PL_stderrio);
PL_stderrio = NULL;
PL_DBgv = NULL;
PL_DBline = NULL;
PL_DBsub = NULL;
PL_DBsingle = NULL;
PL_DBtrace = NULL;
PL_DBsignal = NULL;
PL_DBcv = NULL;
PL_dbargs = NULL;
PL_debstash = NULL;
AvREFCNT_dec(PL_argvout_stack);
PL_argvout_stack = NULL;
HVcpNULL(PL_modglobal);
AvREFCNT_dec(PL_preambleav);
PL_preambleav = NULL;
SvREFCNT_dec(PL_subname);
PL_subname = NULL;
#ifdef PERL_USES_PL_PIDSTATUS
SvREFCNT_dec(PL_pidstatus);
PL_pidstatus = NULL;
#endif
/* free locale stuff */
#ifdef USE_LOCALE_NUMERIC
Safefree(PL_numeric_name);
PL_numeric_name = NULL;
SvREFCNT_dec(PL_numeric_radix_sv);
PL_numeric_radix_sv = NULL;
#endif
/* clear utf8 character classes */
SvREFCNT_dec(PL_utf8_alnum);
SvREFCNT_dec(PL_utf8_ascii);
SvREFCNT_dec(PL_utf8_alpha);
SvREFCNT_dec(PL_utf8_space);
SvREFCNT_dec(PL_utf8_cntrl);
SvREFCNT_dec(PL_utf8_graph);
SvREFCNT_dec(PL_utf8_digit);
SvREFCNT_dec(PL_utf8_upper);
SvREFCNT_dec(PL_utf8_lower);
SvREFCNT_dec(PL_utf8_print);
SvREFCNT_dec(PL_utf8_punct);
SvREFCNT_dec(PL_utf8_xdigit);
SvREFCNT_dec(PL_utf8_mark);
SvREFCNT_dec(PL_utf8_toupper);
SvREFCNT_dec(PL_utf8_totitle);
SvREFCNT_dec(PL_utf8_tolower);
SvREFCNT_dec(PL_utf8_tofold);
SvREFCNT_dec(PL_utf8_idstart);
SvREFCNT_dec(PL_utf8_idcont);
PL_utf8_alnum = NULL;
PL_utf8_ascii = NULL;
PL_utf8_alpha = NULL;
PL_utf8_space = NULL;
PL_utf8_cntrl = NULL;
PL_utf8_graph = NULL;
PL_utf8_digit = NULL;
PL_utf8_upper = NULL;
PL_utf8_lower = NULL;
PL_utf8_print = NULL;
PL_utf8_punct = NULL;
PL_utf8_xdigit = NULL;
PL_utf8_mark = NULL;
PL_utf8_toupper = NULL;
PL_utf8_totitle = NULL;
PL_utf8_tolower = NULL;
PL_utf8_tofold = NULL;
PL_utf8_idstart = NULL;
PL_utf8_idcont = NULL;
/* Compiliation variables */
CVcpNULL(PL_compcv);
if (!specialWARN(PL_compiling.cop_warnings))
PerlMemShared_free(PL_compiling.cop_warnings);
PL_compiling.cop_warnings = NULL;
HVcpNULL(PL_compiling.cop_hints_hash);
CopSTASH_free(&PL_compiling);
SVcpNULL(PL_dynamicscope);
IOcpNULL(PL_statio);
/* Prepare to destruct main symbol table. */
HVcpNULL(PL_curstash);
hv = PL_defstash;
PL_defstash = 0;
HvREFCNT_dec(hv);
SVcpNULL(PL_curstname);
/* clear queued errors */
SvREFCNT_dec(PL_errors);
PL_errors = NULL;
HVcpNULL(PL_isarev);
FREETMPS;
if (destruct_level >= 2 && ckWARN_d(WARN_INTERNAL)) {
if (PL_scopestack_ix != 0)
Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
"Unbalanced scopes: %ld more ENTERs than LEAVEs\n",
(long)PL_scopestack_ix);
if (PL_savestack_ix != 0)
Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
"Unbalanced saves: %ld more saves than restores\n",
(long)PL_savestack_ix);
if (PL_tmps_floor != -1)
Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced tmps: %ld more allocs than frees\n",
(long)PL_tmps_floor + 1);
if (cxstack_ix != -1)
Perl_warner(aTHX_ packWARN(WARN_INTERNAL),"Unbalanced context: %ld more PUSHes than POPs\n",
(long)cxstack_ix + 1);
}
/* the 3 is for PL_fdpid and PL_strtab and PL_isarev */
/* while (sv_clean_all() > 3) */
/* ; */
/* clear *_ */
GvREFCNT_dec(PL_defgv);
PL_defgv = NULL;
AvREFCNT_dec(PL_fdpid); /* needed in io_close() */
PL_fdpid = NULL;
#ifdef HAVE_INTERP_INTERN
sys_intern_clear();
#endif
if (PL_destroyav)
call_destructors();
/* Destruct the global string table. */
{
/* Yell and reset the HeVAL() slots that are still holding refcounts,
* so that sv_free() won't fail on them.
* Now that the global string table is using a single hunk of memory
* for both HE and HEK, we either need to explicitly unshare it the
* correct way, or actually free things here.
*/
I32 riter = 0;
const I32 max = HvMAX(PL_strtab);
HE * const * const array = HvARRAY(PL_strtab);
HE *hent = array[0];
for (;;) {
if (hent && ckWARN_d(WARN_INTERNAL)) {
HE * const next = HeNEXT(hent);
/* FIXME, turn this on when leaked scalars are found */
/* Perl_warner(aTHX_ packWARN(WARN_INTERNAL), */
/* "Unbalanced string table refcount: (%ld) for \"%s\"", */
/* (long)hent->he_valu.hent_refcount, HeKEY(hent)); */
Safefree(hent);
hent = next;
}
if (!hent) {
if (++riter > max)
break;
hent = array[riter];
}
}
Safefree(array);
HvARRAY(PL_strtab) = 0;
HvTOTALKEYS(PL_strtab) = 0;
HvFILL(PL_strtab) = 0;
}
HvREFCNT_dec(PL_strtab);
/* free special SVs */
SvREFCNT(&PL_sv_yes) = 0;
sv_clear(&PL_sv_yes);
SvANY(&PL_sv_yes) = NULL;
SvFLAGS(&PL_sv_yes) = 0;
SvREFCNT(&PL_sv_no) = 0;
sv_clear(&PL_sv_no);
SvANY(&PL_sv_no) = NULL;
SvFLAGS(&PL_sv_no) = 0;
{
int i;
for (i=0; i<=2; i++) {
SvREFCNT(PERL_DEBUG_PAD(i)) = 0;
sv_clear(PERL_DEBUG_PAD(i));
SvANY(PERL_DEBUG_PAD(i)) = NULL;
SvFLAGS(PERL_DEBUG_PAD(i)) = 0;
}
}
nuke_stacks();
#ifdef DEBUGGING
/* if (PL_sv_count != 0) { */
/* PerlIO_printf(Perl_debug_log, "Scalars leaked: %ld\n", (long)PL_sv_count); */
/* sv_report_used(); */
/* } */
#endif
#ifdef PERL_DEBUG_READONLY_OPS
free(PL_slabs);
PL_slabs = NULL;
PL_slab_count = 0;
#endif
#if defined(PERLIO_LAYERS)
/* No more IO - including error messages ! */
PerlIO_cleanup(aTHX);
#endif
/* sv_undef needs to stay immortal until after PerlIO_cleanup
as currently layers use it rather than NULL as a marker
for no arg - and will try and SvREFCNT_dec it.
*/
SvREFCNT(&PL_sv_undef) = 0;
SvREADONLY_off(&PL_sv_undef);
Safefree(PL_origfilename);
PL_origfilename = NULL;
Safefree(PL_reg_start_tmp);
PL_reg_start_tmp = (char**)NULL;
PL_reg_start_tmpl = 0;
Safefree(PL_reg_curpm);
Safefree(PL_reg_poscache);
free_tied_hv_pool();
Safefree(PL_op_mask);
Safefree(PL_psig_name);
PL_psig_name = (SV**)NULL;
PL_psig_ptr = (SV**)NULL;
Safefree(PL_psig_pend);
PL_psig_pend = (int*)NULL;
{
/* We need to NULL PL_psig_pend first, so that
signal handlers know not to use it */
int *psig_save = PL_psig_pend;
PL_psig_pend = (int*)NULL;
Safefree(psig_save);
}
PL_hints = 0; /* Reset hints. Should hints be per-interpreter ? */
PL_debug = 0;
#ifdef PERL_IMPLICIT_CONTEXT
#ifndef PERL_GLOBAL_STRUCT_PRIVATE
Safefree(PL_my_cxt_list);
PL_my_cxt_list = NULL;
PL_my_cxt_size = 0;
#endif
#endif
DEBUG_P(debprofdump());
#ifdef USE_REENTRANT_API
Perl_reentrant_free(aTHX);
#endif
sv_free_arenas();
while (PL_regmatch_slab) {
regmatch_slab *s = PL_regmatch_slab;
PL_regmatch_slab = PL_regmatch_slab->next;
Safefree(s);
}
/* As the absolutely last thing, free the non-arena SV for mess() */
if (PL_mess_sv) {
/* we know that type == SVt_PVMG */
/* it could have accumulated taint magic */
MAGIC* mg;
MAGIC* moremagic;
for (mg = SvMAGIC(PL_mess_sv); mg; mg = moremagic) {
moremagic = mg->mg_moremagic;
if (mg->mg_ptr && mg->mg_type != PERL_MAGIC_regex_global
&& mg->mg_len >= 0)
Safefree(mg->mg_ptr);
Safefree(mg);
}
/* we know that type >= SVt_PV */
SvPV_free(PL_mess_sv);
Safefree(SvANY(PL_mess_sv));
Safefree(PL_mess_sv);
PL_mess_sv = NULL;
}
return STATUS_EXIT;
}
/*
=for apidoc perl_free
Releases a Perl interpreter. See L<perlembed>.
=cut
*/
void
perl_free(pTHXx)
{
dVAR;
PERL_ARGS_ASSERT_PERL_FREE;
if (PL_veto_cleanup)
return;
#ifdef PERL_TRACK_MEMPOOL
{
/*
* Don't free thread memory if PERL_DESTRUCT_LEVEL is set to a non-zero
* value as we're probably hunting memory leaks then
*/
const char * const s = PerlEnv_getenv("PERL_DESTRUCT_LEVEL");
if (!s || atoi(s) == 0) {
const U32 old_debug = PL_debug;
/* Emulate the PerlHost behaviour of free()ing all memory allocated in this
thread at thread exit. */
if (DEBUG_m_TEST) {
PerlIO_puts(Perl_debug_log, "Disabling memory debugging as we "
"free this thread's memory\n");
PL_debug &= ~ DEBUG_m_FLAG;
}
while(aTHXx->Imemory_debug_header.next != &(aTHXx->Imemory_debug_header))
safesysfree(sTHX + (char *)(aTHXx->Imemory_debug_header.next));
PL_debug = old_debug;
}
}
#endif
#if defined(WIN32) || defined(NETWARE)
# if defined(PERL_IMPLICIT_SYS)
{
# ifdef NETWARE
void *host = nw_internal_host;
# else
void *host = w32_internal_host;
# endif
PerlMem_free(aTHXx);
# ifdef NETWARE
nw_delete_internal_host(host);
# else
win32_delete_internal_host(host);
# endif
}
# else
PerlMem_free(aTHXx);
# endif
#else
PerlMem_free(aTHXx);
#endif
}
void
Perl_call_atexit(pTHX_ ATEXIT_t fn, void *ptr)
{
dVAR;
Renew(PL_exitlist, PL_exitlistlen+1, PerlExitListEntry);
PL_exitlist[PL_exitlistlen].fn = fn;
PL_exitlist[PL_exitlistlen].ptr = ptr;
++PL_exitlistlen;
}
#ifdef HAS_PROCSELFEXE
/* This is a function so that we don't hold on to MAXPATHLEN
bytes of stack longer than necessary
*/
STATIC void
S_procself_val(pTHX_ SV *sv, const char *arg0)
{
char buf[MAXPATHLEN];
int len = readlink(PROCSELFEXE_PATH, buf, sizeof(buf) - 1);
/* On Playstation2 Linux V1.0 (kernel 2.2.1) readlink(/proc/self/exe)
includes a spurious NUL which will cause $^EXECUTABLE_NAME to fail in system
or backticks (this will prevent extensions from being built and
many tests from working). readlink is not meant to add a NUL.
Normal readlink works fine.
*/
if (len > 0 && buf[len-1] == '\0') {
len--;
}
/* FreeBSD's implementation is acknowledged to be imperfect, sometimes
returning the text "unknown" from the readlink rather than the path
to the executable (or returning an error from the readlink). Any valid
path has a '/' in it somewhere, so use that to validate the result.
See http://www.freebsd.org/cgi/query-pr.cgi?pr=35703
*/
if (len > 0 && memchr(buf, '/', len)) {
sv_setpvn(sv,buf,len);
}
else {
sv_setpv(sv,arg0);
}