remove gc

1 files changed, 0 insertions, 1083 deletions

diff --git a/gc/dyn_load.c b/gc/dyn_load.c
deleted file mode 100644
index 05cedff..0000000
--- a/gc/dyn_load.c
+++ /dev/null
@@ -1,1083 +0,0 @@
-/*
- * Copyright (c) 1991-1994 by Xerox Corporation.  All rights reserved.
- * Copyright (c) 1997 by Silicon Graphics.  All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose,  provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- *
- * Original author: Bill Janssen
- * Heavily modified by Hans Boehm and others
- */
-
-/*
- * This is incredibly OS specific code for tracking down data sections in
- * dynamic libraries.  There appears to be no way of doing this quickly
- * without groveling through undocumented data structures.  We would argue
- * that this is a bug in the design of the dlopen interface.  THIS CODE
- * MAY BREAK IN FUTURE OS RELEASES.  If this matters to you, don't hesitate
- * to let your vendor know ...
- *
- * None of this is safe with dlclose and incremental collection.
- * But then not much of anything is safe in the presence of dlclose.
- */
-#if defined(__linux__) && !defined(_GNU_SOURCE)
-    /* Can't test LINUX, since this must be define before other includes */
-#   define _GNU_SOURCE
-#endif
-#if !defined(MACOS) && !defined(_WIN32_WCE)
-#  include <sys/types.h>
-#endif
-#include "private/gc_priv.h"
-
-/* BTL: avoid circular redefinition of dlopen if GC_SOLARIS_THREADS defined */
-# if (defined(GC_PTHREADS) || defined(GC_SOLARIS_THREADS)) \
-      && defined(dlopen) && !defined(GC_USE_LD_WRAP)
-    /* To support threads in Solaris, gc.h interposes on dlopen by       */
-    /* defining "dlopen" to be "GC_dlopen", which is implemented below.  */
-    /* However, both GC_FirstDLOpenedLinkMap() and GC_dlopen() use the   */
-    /* real system dlopen() in their implementation. We first remove     */
-    /* gc.h's dlopen definition and restore it later, after GC_dlopen(). */
-#   undef dlopen
-#   define GC_must_restore_redefined_dlopen
-# else
-#   undef GC_must_restore_redefined_dlopen
-# endif
-
-#if (defined(DYNAMIC_LOADING) || defined(MSWIN32) || defined(MSWINCE)) \
-    && !defined(PCR)
-#if !defined(SUNOS4) && !defined(SUNOS5DL) && !defined(IRIX5) && \
-    !defined(MSWIN32) && !defined(MSWINCE) && \
-    !(defined(ALPHA) && defined(OSF1)) && \
-    !defined(HPUX) && !(defined(LINUX) && defined(__ELF__)) && \
-    !defined(RS6000) && !defined(SCO_ELF) && !defined(DGUX) && \
-    !(defined(FREEBSD) && defined(__ELF__)) && \
-    !(defined(NETBSD) && defined(__ELF__)) && !defined(HURD)
- --> We only know how to find data segments of dynamic libraries for the
- --> above.  Additional SVR4 variants might not be too
- --> hard to add.
-#endif
-
-#include <stdio.h>
-#ifdef SUNOS5DL
-#   include <sys/elf.h>
-#   include <dlfcn.h>
-#   include <link.h>
-#endif
-#ifdef SUNOS4
-#   include <dlfcn.h>
-#   include <link.h>
-#   include <a.out.h>
-  /* struct link_map field overrides */
-#   define l_next	lm_next
-#   define l_addr	lm_addr
-#   define l_name	lm_name
-#endif
-
-#if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
-    (defined(FREEBSD) && defined(__ELF__)) || defined(DGUX) || \
-    (defined(NETBSD) && defined(__ELF__)) || defined(HURD)
-#   include <stddef.h>
-#   include <elf.h>
-#   include <link.h>
-#endif
-
-/* Newer versions of GNU/Linux define this macro.  We
- * define it similarly for any ELF systems that don't.  */
-#  ifndef ElfW
-#    if !defined(ELF_CLASS) || ELF_CLASS == ELFCLASS32
-#      define ElfW(type) Elf32_##type
-#    else
-#      define ElfW(type) Elf64_##type
-#    endif
-#  endif
-
-#if defined(SUNOS5DL) && !defined(USE_PROC_FOR_LIBRARIES)
-
-#ifdef LINT
-    Elf32_Dyn _DYNAMIC;
-#endif
-
-static struct link_map *
-GC_FirstDLOpenedLinkMap()
-{
-    extern ElfW(Dyn) _DYNAMIC;
-    ElfW(Dyn) *dp;
-    struct r_debug *r;
-    static struct link_map * cachedResult = 0;
-    static ElfW(Dyn) *dynStructureAddr = 0;
-    			/* BTL: added to avoid Solaris 5.3 ld.so _DYNAMIC bug */
-
-#   ifdef SUNOS53_SHARED_LIB
-	/* BTL: Avoid the Solaris 5.3 bug that _DYNAMIC isn't being set	*/
-	/* up properly in dynamically linked .so's. This means we have	*/
-	/* to use its value in the set of original object files loaded	*/
-	/* at program startup.						*/
-	if( dynStructureAddr == 0 ) {
-	  void* startupSyms = dlopen(0, RTLD_LAZY);
-	  dynStructureAddr = (ElfW(Dyn)*)dlsym(startupSyms, "_DYNAMIC");
-		}
-#   else
-	dynStructureAddr = &_DYNAMIC;
-#   endif
-
-    if( dynStructureAddr == 0) {
-        return(0);
-    }
-    if( cachedResult == 0 ) {
-        int tag;
-        for( dp = ((ElfW(Dyn) *)(&_DYNAMIC)); (tag = dp->d_tag) != 0; dp++ ) {
-            if( tag == DT_DEBUG ) {
-                struct link_map *lm
-                        = ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
-                if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
-                break;
-            }
-        }
-    }
-    return cachedResult;
-}
-
-#endif /* SUNOS5DL ... */
-
-/* BTL: added to fix circular dlopen definition if GC_SOLARIS_THREADS defined */
-# if defined(GC_must_restore_redefined_dlopen)
-#   define dlopen GC_dlopen
-# endif
-
-#if defined(SUNOS4) && !defined(USE_PROC_FOR_LIBRARIES)
-
-#ifdef LINT
-    struct link_dynamic _DYNAMIC;
-#endif
-
-static struct link_map *
-GC_FirstDLOpenedLinkMap()
-{
-    extern struct link_dynamic _DYNAMIC;
-
-    if( &_DYNAMIC == 0) {
-        return(0);
-    }
-    return(_DYNAMIC.ld_un.ld_1->ld_loaded);
-}
-
-/* Return the address of the ld.so allocated common symbol	*/
-/* with the least address, or 0 if none.			*/
-static ptr_t GC_first_common()
-{
-    ptr_t result = 0;
-    extern struct link_dynamic _DYNAMIC;
-    struct rtc_symb * curr_symbol;
-    
-    if( &_DYNAMIC == 0) {
-        return(0);
-    }
-    curr_symbol = _DYNAMIC.ldd -> ldd_cp;
-    for (; curr_symbol != 0; curr_symbol = curr_symbol -> rtc_next) {
-        if (result == 0
-            || (ptr_t)(curr_symbol -> rtc_sp -> n_value) < result) {
-            result = (ptr_t)(curr_symbol -> rtc_sp -> n_value);
-        }
-    }
-    return(result);
-}
-
-#endif  /* SUNOS4 ... */
-
-# if defined(SUNOS4) || defined(SUNOS5DL)
-/* Add dynamic library data sections to the root set.		*/
-# if !defined(PCR) && !defined(GC_SOLARIS_THREADS) && defined(THREADS)
-#   ifndef SRC_M3
-	--> fix mutual exclusion with dlopen
-#   endif  /* We assume M3 programs don't call dlopen for now */
-# endif
-
-# ifndef USE_PROC_FOR_LIBRARIES
-void GC_register_dynamic_libraries()
-{
-  struct link_map *lm = GC_FirstDLOpenedLinkMap();
-  
-
-  for (lm = GC_FirstDLOpenedLinkMap();
-       lm != (struct link_map *) 0;  lm = lm->l_next)
-    {
-#     ifdef SUNOS4
-	struct exec *e;
-	 
-        e = (struct exec *) lm->lm_addr;
-        GC_add_roots_inner(
-      		    ((char *) (N_DATOFF(*e) + lm->lm_addr)),
-		    ((char *) (N_BSSADDR(*e) + e->a_bss + lm->lm_addr)),
-		    TRUE);
-#     endif
-#     ifdef SUNOS5DL
-	ElfW(Ehdr) * e;
-        ElfW(Phdr) * p;
-        unsigned long offset;
-        char * start;
-        register int i;
-        
-	e = (ElfW(Ehdr) *) lm->l_addr;
-        p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff));
-        offset = ((unsigned long)(lm->l_addr));
-        for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
-          switch( p->p_type ) {
-            case PT_LOAD:
-              {
-                if( !(p->p_flags & PF_W) ) break;
-                start = ((char *)(p->p_vaddr)) + offset;
-                GC_add_roots_inner(
-                  start,
-                  start + p->p_memsz,
-                  TRUE
-                );
-              }
-              break;
-            default:
-              break;
-          }
-	}
-#     endif
-    }
-#   ifdef SUNOS4
-      {
-      	static ptr_t common_start = 0;
-      	ptr_t common_end;
-      	extern ptr_t GC_find_limit();
-      	
-      	if (common_start == 0) common_start = GC_first_common();
-      	if (common_start != 0) {
-      	    common_end = GC_find_limit(common_start, TRUE);
-      	    GC_add_roots_inner((char *)common_start, (char *)common_end, TRUE);
-      	}
-      }
-#   endif
-}
-
-# endif /* !USE_PROC ... */
-# endif /* SUNOS */
-
-#if defined(LINUX) && defined(__ELF__) || defined(SCO_ELF) || \
-    (defined(FREEBSD) && defined(__ELF__)) || defined(DGUX) || \
-    (defined(NETBSD) && defined(__ELF__)) || defined(HURD)
-
-
-#ifdef USE_PROC_FOR_LIBRARIES
-
-#include <string.h>
-
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-
-#define MAPS_BUF_SIZE (32*1024)
-
-extern ssize_t GC_repeat_read(int fd, char *buf, size_t count);
-	/* Repeatedly read until buffer is filled, or EOF is encountered */
-	/* Defined in os_dep.c.  					 */
-
-static char *parse_map_entry(char *buf_ptr, word *start, word *end,
-                             char *prot_buf, unsigned int *maj_dev);
-
-void GC_register_dynamic_libraries()
-{
-    int f;
-    int result;
-    char prot_buf[5];
-    int maps_size;
-    char maps_temp[32768];
-    char *maps_buf;
-    char *buf_ptr;
-    int count;
-    word start, end;
-    unsigned int maj_dev, min_dev;
-    word least_ha, greatest_ha;
-    unsigned i;
-    word datastart = (word)(DATASTART);
-
-    /* Read /proc/self/maps	*/
-        /* Note that we may not allocate, and thus can't use stdio.	*/
-        f = open("/proc/self/maps", O_RDONLY);
-        if (-1 == f) ABORT("Couldn't open /proc/self/maps");
-	/* stat() doesn't work for /proc/self/maps, so we have to
-	   read it to find out how large it is... */
-	maps_size = 0;
-	do {
-	    result = GC_repeat_read(f, maps_temp, sizeof(maps_temp));
-	    if (result <= 0) ABORT("Couldn't read /proc/self/maps");
-	    maps_size += result;
-	} while (result == sizeof(maps_temp));
-
-	if (maps_size > sizeof(maps_temp)) {
-	    /* If larger than our buffer, close and re-read it. */
-	    close(f);
-	    f = open("/proc/self/maps", O_RDONLY);
-	    if (-1 == f) ABORT("Couldn't open /proc/self/maps");
-	    maps_buf = alloca(maps_size);
-	    if (NULL == maps_buf) ABORT("/proc/self/maps alloca failed");
-	    result = GC_repeat_read(f, maps_buf, maps_size);
-	    if (result <= 0) ABORT("Couldn't read /proc/self/maps");
-	} else {
-	    /* Otherwise use the fixed size buffer */
-	    maps_buf = maps_temp;
-	}
-
-	close(f);
-        maps_buf[result] = '\0';
-        buf_ptr = maps_buf;
-    /* Compute heap bounds. Should be done by add_to_heap?	*/
-	least_ha = (word)(-1);
-	greatest_ha = 0;
-	for (i = 0; i < GC_n_heap_sects; ++i) {
-	    word sect_start = (word)GC_heap_sects[i].hs_start;
-	    word sect_end = sect_start + GC_heap_sects[i].hs_bytes;
-	    if (sect_start < least_ha) least_ha = sect_start;
-	    if (sect_end > greatest_ha) greatest_ha = sect_end;
-        }
-    	if (greatest_ha < (word)GC_scratch_last_end_ptr)
-	    greatest_ha = (word)GC_scratch_last_end_ptr; 
-    for (;;) {
-
-        buf_ptr = parse_map_entry(buf_ptr, &start, &end, prot_buf, &maj_dev);
-	if (buf_ptr == NULL) return;
-
-	if (prot_buf[1] == 'w') {
-	    /* This is a writable mapping.  Add it to		*/
-	    /* the root set unless it is already otherwise	*/
-	    /* accounted for.					*/
-	    if (start <= (word)GC_stackbottom && end >= (word)GC_stackbottom) {
-		/* Stack mapping; discard	*/
-		continue;
-	    }
-	    if (start <= datastart && end > datastart && maj_dev != 0) {
-		/* Main data segment; discard	*/
-		continue;
-	    }
-#	    ifdef THREADS
-	      if (GC_segment_is_thread_stack(start, end)) continue;
-#	    endif
-	    /* The rest of this assumes that there is no mapping	*/
-	    /* spanning the beginning of the data segment, or extending	*/
-	    /* beyond the entire heap at both ends.  			*/
-	    /* Empirically these assumptions hold.			*/
-	    
-	    if (start < (word)DATAEND && end > (word)DATAEND) {
-		/* Rld may use space at the end of the main data 	*/
-		/* segment.  Thus we add that in.			*/
-		start = (word)DATAEND;
-	    }
-	    if (start < least_ha && end > least_ha) {
-		end = least_ha;
-	    }
-	    if (start < greatest_ha && end > greatest_ha) {
-		start = greatest_ha;
-	    }
-	    if (start >= least_ha && end <= greatest_ha) continue;
-	    GC_add_roots_inner((char *)start, (char *)end, TRUE);
-	}
-     }
-}
-
-//
-//  parse_map_entry parses an entry from /proc/self/maps so we can
-//  locate all writable data segments that belong to shared libraries.
-//  The format of one of these entries and the fields we care about
-//  is as follows:
-//  XXXXXXXX-XXXXXXXX r-xp 00000000 30:05 260537     name of mapping...\n
-//  ^^^^^^^^ ^^^^^^^^ ^^^^          ^^
-//  start    end      prot          maj_dev
-//  0        9        18            32
-//
-//  The parser is called with a pointer to the entry and the return value
-//  is either NULL or is advanced to the next entry(the byte after the
-//  trailing '\n'.)
-//
-#define OFFSET_MAP_START   0
-#define OFFSET_MAP_END     9
-#define OFFSET_MAP_PROT   18
-#define OFFSET_MAP_MAJDEV 32
-
-static char *parse_map_entry(char *buf_ptr, word *start, word *end,
-                             char *prot_buf, unsigned int *maj_dev)
-{
-    int i;
-    unsigned int val;
-    char *tok;
-
-    if (buf_ptr == NULL || *buf_ptr == '\0') {
-        return NULL;
-    }
-
-    memcpy(prot_buf, buf_ptr+OFFSET_MAP_PROT, 4); // do the protections first
-    prot_buf[4] = '\0';
-
-    if (prot_buf[1] == 'w') { // we can skip all of this if it's not writable
-
-        tok = buf_ptr;
-        buf_ptr[OFFSET_MAP_START+8] = '\0';
-        *start = strtoul(tok, NULL, 16);
-
-        tok = buf_ptr+OFFSET_MAP_END;
-        buf_ptr[OFFSET_MAP_END+8] = '\0';
-        *end = strtoul(tok, NULL, 16);
-
-        buf_ptr += OFFSET_MAP_MAJDEV;
-        tok = buf_ptr;
-        while (*buf_ptr != ':') buf_ptr++;
-        *buf_ptr++ = '\0';
-        *maj_dev = strtoul(tok, NULL, 16);
-    }
-
-    while (*buf_ptr && *buf_ptr++ != '\n');
-
-    return buf_ptr;
-}
-
-#endif /* USE_PROC_FOR_LIBRARIES */
-
-#if !defined(USE_PROC_FOR_LIBRARIES)
-/* The following is the preferred way to walk dynamic libraries	*/
-/* For glibc 2.2.4+.  Unfortunately, it doesn't work for older	*/
-/* versions.  Thanks to Jakub Jelinek for most of the code.	*/
-
-# if defined(LINUX) /* Are others OK here, too? */ \
-     && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
-         || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG))) 
-
-/* We have the header files for a glibc that includes dl_iterate_phdr.	*/
-/* It may still not be available in the library on the target system.   */
-/* Thus we also treat it as a weak symbol.				*/
-#define HAVE_DL_ITERATE_PHDR
-
-static int GC_register_dynlib_callback(info, size, ptr)
-     struct dl_phdr_info * info;
-     size_t size;
-     void * ptr;
-{
-  const ElfW(Phdr) * p;
-  char * start;
-  register int i;
-
-  /* Make sure struct dl_phdr_info is at least as big as we need.  */
-  if (size < offsetof (struct dl_phdr_info, dlpi_phnum)
-      + sizeof (info->dlpi_phnum))
-    return -1;
-
-  /* Skip the first object - it is the main program.  */
-  if (*(int *)ptr == 0)
-    {
-      *(int *)ptr = 1;
-      return 0;
-    }
-
-  p = info->dlpi_phdr;
-  for( i = 0; i < (int)(info->dlpi_phnum); ((i++),(p++)) ) {
-    switch( p->p_type ) {
-      case PT_LOAD:
-	{
-	  if( !(p->p_flags & PF_W) ) break;
-	  start = ((char *)(p->p_vaddr)) + info->dlpi_addr;
-	  GC_add_roots_inner(start, start + p->p_memsz, TRUE);
-	}
-      break;
-      default:
-	break;
-    }
-  }
-
-  return 0;
-}     
-
-/* Return TRUE if we succeed, FALSE if dl_iterate_phdr wasn't there. */
-
-#pragma weak dl_iterate_phdr
-
-GC_bool GC_register_dynamic_libraries_dl_iterate_phdr()
-{
-  int tmp = 0;
-
-  if (dl_iterate_phdr) {
-    dl_iterate_phdr(GC_register_dynlib_callback, &tmp);
-    return TRUE;
-  } else {
-    return FALSE;
-  }
-}
-
-# else /* !LINUX || version(glibc) < 2.2.4 */
-
-/* Dynamic loading code for Linux running ELF. Somewhat tested on
- * Linux/x86, untested but hopefully should work on Linux/Alpha. 
- * This code was derived from the Solaris/ELF support. Thanks to
- * whatever kind soul wrote that.  - Patrick Bridges */
-
-/* This doesn't necessarily work in all cases, e.g. with preloaded
- * dynamic libraries.						*/
-
-#if defined(NETBSD)
-#  include <sys/exec_elf.h>
-#else
-#  include <elf.h>
-#endif
-#include <link.h>
-
-# endif
-
-#ifdef __GNUC__
-# pragma weak _DYNAMIC
-#endif
-extern ElfW(Dyn) _DYNAMIC[];
-
-static struct link_map *
-GC_FirstDLOpenedLinkMap()
-{
-    ElfW(Dyn) *dp;
-    struct r_debug *r;
-    static struct link_map *cachedResult = 0;
-
-    if( _DYNAMIC == 0) {
-        return(0);
-    }
-    if( cachedResult == 0 ) {
-        int tag;
-        for( dp = _DYNAMIC; (tag = dp->d_tag) != 0; dp++ ) {
-            if( tag == DT_DEBUG ) {
-                struct link_map *lm
-                        = ((struct r_debug *)(dp->d_un.d_ptr))->r_map;
-                if( lm != 0 ) cachedResult = lm->l_next; /* might be NIL */
-                break;
-            }
-        }
-    }
-    return cachedResult;
-}
-
-
-void GC_register_dynamic_libraries()
-{
-  struct link_map *lm;
-  
-
-# ifdef HAVE_DL_ITERATE_PHDR
-    if (GC_register_dynamic_libraries_dl_iterate_phdr()) {
-	return;
-    }
-# endif
-  lm = GC_FirstDLOpenedLinkMap();
-  for (lm = GC_FirstDLOpenedLinkMap();
-       lm != (struct link_map *) 0;  lm = lm->l_next)
-    {
-	ElfW(Ehdr) * e;
-        ElfW(Phdr) * p;
-        unsigned long offset;
-        char * start;
-        register int i;
-        
-	e = (ElfW(Ehdr) *) lm->l_addr;
-        p = ((ElfW(Phdr) *)(((char *)(e)) + e->e_phoff));
-        offset = ((unsigned long)(lm->l_addr));
-        for( i = 0; i < (int)(e->e_phnum); ((i++),(p++)) ) {
-          switch( p->p_type ) {
-            case PT_LOAD:
-              {
-                if( !(p->p_flags & PF_W) ) break;
-                start = ((char *)(p->p_vaddr)) + offset;
-                GC_add_roots_inner(start, start + p->p_memsz, TRUE);
-              }
-              break;
-            default:
-              break;
-          }
-	}
-    }
-}
-
-#endif /* !USE_PROC_FOR_LIBRARIES */
-
-#endif /* LINUX */
-
-#if defined(IRIX5) || (defined(USE_PROC_FOR_LIBRARIES) && !defined(LINUX))
-
-#include <sys/procfs.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <elf.h>
-#include <errno.h>
-#include <signal.h>  /* Only for the following test. */
-#ifndef _sigargs
-# define IRIX6
-#endif
-
-extern void * GC_roots_present();
-	/* The type is a lie, since the real type doesn't make sense here, */
-	/* and we only test for NULL.					   */
-
-
-/* We use /proc to track down all parts of the address space that are	*/
-/* mapped by the process, and throw out regions we know we shouldn't	*/
-/* worry about.  This may also work under other SVR4 variants.		*/
-void GC_register_dynamic_libraries()
-{
-    static int fd = -1;
-    char buf[30];
-    static prmap_t * addr_map = 0;
-    static int current_sz = 0;	/* Number of records currently in addr_map */
-    static int needed_sz;	/* Required size of addr_map		*/
-    register int i;
-    register long flags;
-    register ptr_t start;
-    register ptr_t limit;
-    ptr_t heap_start = (ptr_t)HEAP_START;
-    ptr_t heap_end = heap_start;
-
-#   ifdef SUNOS5DL
-#     define MA_PHYS 0
-#   endif /* SUNOS5DL */
-
-    if (fd < 0) {
-      sprintf(buf, "/proc/%d", getpid());
-	/* The above generates a lint complaint, since pid_t varies.	*/
-	/* It's unclear how to improve this.				*/
-      fd = open(buf, O_RDONLY);
-      if (fd < 0) {
-    	ABORT("/proc open failed");
-      }
-    }
-    if (ioctl(fd, PIOCNMAP, &needed_sz) < 0) {
-	GC_err_printf2("fd = %d, errno = %d\n", fd, errno);
-    	ABORT("/proc PIOCNMAP ioctl failed");
-    }
-    if (needed_sz >= current_sz) {
-        current_sz = needed_sz * 2 + 1;
-        		/* Expansion, plus room for 0 record */
-        addr_map = (prmap_t *)GC_scratch_alloc((word)
-						(current_sz * sizeof(prmap_t)));
-    }
-    if (ioctl(fd, PIOCMAP, addr_map) < 0) {
-        GC_err_printf4("fd = %d, errno = %d, needed_sz = %d, addr_map = 0x%X\n",
-                        fd, errno, needed_sz, addr_map);
-    	ABORT("/proc PIOCMAP ioctl failed");
-    };
-    if (GC_n_heap_sects > 0) {
-    	heap_end = GC_heap_sects[GC_n_heap_sects-1].hs_start
-    			+ GC_heap_sects[GC_n_heap_sects-1].hs_bytes;
-    	if (heap_end < GC_scratch_last_end_ptr) heap_end = GC_scratch_last_end_ptr; 
-    }
-    for (i = 0; i < needed_sz; i++) {
-        flags = addr_map[i].pr_mflags;
-        if ((flags & (MA_BREAK | MA_STACK | MA_PHYS)) != 0) goto irrelevant;
-        if ((flags & (MA_READ | MA_WRITE)) != (MA_READ | MA_WRITE))
-            goto irrelevant;
-          /* The latter test is empirically useless in very old Irix	*/
-	  /* versions.  Other than the					*/
-          /* main data and stack segments, everything appears to be	*/
-          /* mapped readable, writable, executable, and shared(!!).	*/
-          /* This makes no sense to me.	- HB				*/
-        start = (ptr_t)(addr_map[i].pr_vaddr);
-        if (GC_roots_present(start)) goto irrelevant;
-        if (start < heap_end && start >= heap_start)
-        	goto irrelevant;
-#	ifdef MMAP_STACKS
-	  if (GC_is_thread_stack(start)) goto irrelevant;
-#	endif /* MMAP_STACKS */
-
-        limit = start + addr_map[i].pr_size;
-	/* The following seemed to be necessary for very old versions 	*/
-	/* of Irix, but it has been reported to discard relevant	*/
-	/* segments under Irix 6.5.  					*/
-#	ifndef IRIX6
-	  if (addr_map[i].pr_off == 0 && strncmp(start, ELFMAG, 4) == 0) {
-	    /* Discard text segments, i.e. 0-offset mappings against	*/
-	    /* executable files which appear to have ELF headers.	*/
-	    caddr_t arg;
-	    int obj;
-#	    define MAP_IRR_SZ 10
-	    static ptr_t map_irr[MAP_IRR_SZ];
-	    				/* Known irrelevant map entries	*/
-	    static int n_irr = 0;
-	    struct stat buf;
-	    register int i;
-	    
-	    for (i = 0; i < n_irr; i++) {
-	        if (map_irr[i] == start) goto irrelevant;
-	    }
-	    arg = (caddr_t)start;
-	    obj = ioctl(fd, PIOCOPENM, &arg);
-	    if (obj >= 0) {
-	        fstat(obj, &buf);
-	        close(obj);
-	        if ((buf.st_mode & 0111) != 0) {
-	            if (n_irr < MAP_IRR_SZ) {
-	                map_irr[n_irr++] = start;
-	            }
-	            goto irrelevant;
-	        }
-	    }
-	  }
-#	endif /* !IRIX6 */
-        GC_add_roots_inner(start, limit, TRUE);
-      irrelevant: ;
-    }
-    /* Dont keep cached descriptor, for now.  Some kernels don't like us */
-    /* to keep a /proc file descriptor around during kill -9.		 */
-    	if (close(fd) < 0) ABORT("Couldnt close /proc file");
-	fd = -1;
-}
-
-# endif /* USE_PROC || IRIX5 */
-
-# if defined(MSWIN32) || defined(MSWINCE)
-
-# define WIN32_LEAN_AND_MEAN
-# define NOSERVICE
-# include <windows.h>
-# include <stdlib.h>
-
-  /* We traverse the entire address space and register all segments 	*/
-  /* that could possibly have been written to.				*/
-  
-  extern GC_bool GC_is_heap_base (ptr_t p);
-
-# ifdef GC_WIN32_THREADS
-    extern void GC_get_next_stack(char *start, char **lo, char **hi);
-    void GC_cond_add_roots(char *base, char * limit)
-    {
-      char * curr_base = base;
-      char * next_stack_lo;
-      char * next_stack_hi;
-   
-      if (base == limit) return;
-      for(;;) {
-	  GC_get_next_stack(curr_base, &next_stack_lo, &next_stack_hi);
-	  if (next_stack_lo >= limit) break;
-	  GC_add_roots_inner(curr_base, next_stack_lo, TRUE);
-	  curr_base = next_stack_hi;
-      }
-      if (curr_base < limit) GC_add_roots_inner(curr_base, limit, TRUE);
-    }
-# else
-    void GC_cond_add_roots(char *base, char * limit)
-    {
-      char dummy;
-      char * stack_top
-	 = (char *) ((word)(&dummy) & ~(GC_sysinfo.dwAllocationGranularity-1));
-      if (base == limit) return;
-      if (limit > stack_top && base < GC_stackbottom) {
-    	  /* Part of the stack; ignore it. */
-    	  return;
-      }
-      GC_add_roots_inner(base, limit, TRUE);
-    }
-# endif
-
-# ifndef MSWINCE
-  extern GC_bool GC_no_win32_dlls;
-# endif
-  
-  void GC_register_dynamic_libraries()
-  {
-    MEMORY_BASIC_INFORMATION buf;
-    DWORD result;
-    DWORD protect;
-    LPVOID p;
-    char * base;
-    char * limit, * new_limit;
-
-#   ifdef MSWIN32
-      if (GC_no_win32_dlls) return;
-#   endif
-    base = limit = p = GC_sysinfo.lpMinimumApplicationAddress;
-#   if defined(MSWINCE) && !defined(_WIN32_WCE_EMULATION)
-    /* Only the first 32 MB of address space belongs to the current process */
-    while (p < (LPVOID)0x02000000) {
-        result = VirtualQuery(p, &buf, sizeof(buf));
-	if (result == 0) {
-	    /* Page is free; advance to the next possible allocation base */
-	    new_limit = (char *)
-		(((DWORD) p + GC_sysinfo.dwAllocationGranularity)
-		 & ~(GC_sysinfo.dwAllocationGranularity-1));
-	} else
-#   else
-    while (p < GC_sysinfo.lpMaximumApplicationAddress) {
-        result = VirtualQuery(p, &buf, sizeof(buf));
-#   endif
-	{
-	    if (result != sizeof(buf)) {
-		ABORT("Weird VirtualQuery result");
-	    }
-	    new_limit = (char *)p + buf.RegionSize;
-	    protect = buf.Protect;
-	    if (buf.State == MEM_COMMIT
-		&& (protect == PAGE_EXECUTE_READWRITE
-		    || protect == PAGE_READWRITE)
-		&& !GC_is_heap_base(buf.AllocationBase)) {
-		if ((char *)p != limit) {
-		    GC_cond_add_roots(base, limit);
-		    base = p;
-		}
-		limit = new_limit;
-	    }
-	}
-        if (p > (LPVOID)new_limit /* overflow */) break;
-        p = (LPVOID)new_limit;
-    }
-    GC_cond_add_roots(base, limit);
-  }
-
-#endif /* MSWIN32 || MSWINCE */
-  
-#if defined(ALPHA) && defined(OSF1)
-
-#include <loader.h>
-
-void GC_register_dynamic_libraries()
-{
-  int status;
-  ldr_process_t mypid;
-
-  /* module */
-    ldr_module_t moduleid = LDR_NULL_MODULE;
-    ldr_module_info_t moduleinfo;
-    size_t moduleinfosize = sizeof(moduleinfo);
-    size_t modulereturnsize;    
-
-  /* region */
-    ldr_region_t region; 
-    ldr_region_info_t regioninfo;
-    size_t regioninfosize = sizeof(regioninfo);
-    size_t regionreturnsize;
-
-  /* Obtain id of this process */
-    mypid = ldr_my_process();
-  
-  /* For each module */
-    while (TRUE) {
-
-      /* Get the next (first) module */
-        status = ldr_next_module(mypid, &moduleid);
-
-      /* Any more modules? */
-        if (moduleid == LDR_NULL_MODULE)
-            break;    /* No more modules */
-
-      /* Check status AFTER checking moduleid because */
-      /* of a bug in the non-shared ldr_next_module stub */
-        if (status != 0 ) {
-            GC_printf1("dynamic_load: status = %ld\n", (long)status);
-            {
-                extern char *sys_errlist[];
-                extern int sys_nerr;
-                extern int errno;
-                if (errno <= sys_nerr) {
-                    GC_printf1("dynamic_load: %s\n", (long)sys_errlist[errno]);
-               } else {
-                    GC_printf1("dynamic_load: %d\n", (long)errno);
-                }
-        }
-            ABORT("ldr_next_module failed");
-         }
-
-      /* Get the module information */
-        status = ldr_inq_module(mypid, moduleid, &moduleinfo,
-                                moduleinfosize, &modulereturnsize); 
-        if (status != 0 )
-            ABORT("ldr_inq_module failed");
-
-      /* is module for the main program (i.e. nonshared portion)? */
-          if (moduleinfo.lmi_flags & LDR_MAIN)
-              continue;    /* skip the main module */
-
-#     ifdef VERBOSE
-          GC_printf("---Module---\n");
-          GC_printf("Module ID            = %16ld\n", moduleinfo.lmi_modid);
-          GC_printf("Count of regions     = %16d\n", moduleinfo.lmi_nregion);
-          GC_printf("flags for module     = %16lx\n", moduleinfo.lmi_flags); 
-          GC_printf("pathname of module   = \"%s\"\n", moduleinfo.lmi_name);
-#     endif
-
-      /* For each region in this module */
-        for (region = 0; region < moduleinfo.lmi_nregion; region++) {
-
-          /* Get the region information */
-            status = ldr_inq_region(mypid, moduleid, region, &regioninfo,
-                                    regioninfosize, &regionreturnsize);
-            if (status != 0 )
-                ABORT("ldr_inq_region failed");
-
-          /* only process writable (data) regions */
-            if (! (regioninfo.lri_prot & LDR_W))
-                continue;
-
-#         ifdef VERBOSE
-              GC_printf("--- Region ---\n");
-              GC_printf("Region number    = %16ld\n",
-              	        regioninfo.lri_region_no);
-              GC_printf("Protection flags = %016x\n",  regioninfo.lri_prot);
-              GC_printf("Virtual address  = %16p\n",   regioninfo.lri_vaddr);
-              GC_printf("Mapped address   = %16p\n",   regioninfo.lri_mapaddr);
-              GC_printf("Region size      = %16ld\n",  regioninfo.lri_size);
-              GC_printf("Region name      = \"%s\"\n", regioninfo.lri_name);
-#         endif
-
-          /* register region as a garbage collection root */
-            GC_add_roots_inner (
-                (char *)regioninfo.lri_mapaddr,
-                (char *)regioninfo.lri_mapaddr + regioninfo.lri_size,
-                TRUE);
-
-        }
-    }
-}
-#endif
-
-#if defined(HPUX)
-
-#include <errno.h>
-#include <dl.h>
-
-extern int errno;
-extern char *sys_errlist[];
-extern int sys_nerr;
-
-void GC_register_dynamic_libraries()
-{
-  int status;
-  int index = 1; /* Ordinal position in shared library search list */
-  struct shl_descriptor *shl_desc; /* Shared library info, see dl.h */
-
-  /* For each dynamic library loaded */
-    while (TRUE) {
-
-      /* Get info about next shared library */
-        status = shl_get(index, &shl_desc);
-
-      /* Check if this is the end of the list or if some error occured */
-        if (status != 0) {
-#	 ifdef GC_HPUX_THREADS
-	   /* I've seen errno values of 0.  The man page is not clear	*/
-	   /* as to whether errno should get set on a -1 return.	*/
-	   break;
-#	 else
-          if (errno == EINVAL) {
-              break; /* Moved past end of shared library list --> finished */
-          } else {
-              if (errno <= sys_nerr) {
-                    GC_printf1("dynamic_load: %s\n", (long) sys_errlist[errno]);
-              } else {
-                    GC_printf1("dynamic_load: %d\n", (long) errno);
-	      }
-              ABORT("shl_get failed");
-          }
-#	 endif
-        }
-
-#     ifdef VERBOSE
-          GC_printf0("---Shared library---\n");
-          GC_printf1("\tfilename        = \"%s\"\n", shl_desc->filename);
-          GC_printf1("\tindex           = %d\n", index);
-          GC_printf1("\thandle          = %08x\n",
-					(unsigned long) shl_desc->handle);
-          GC_printf1("\ttext seg. start = %08x\n", shl_desc->tstart);
-          GC_printf1("\ttext seg. end   = %08x\n", shl_desc->tend);
-          GC_printf1("\tdata seg. start = %08x\n", shl_desc->dstart);
-          GC_printf1("\tdata seg. end   = %08x\n", shl_desc->dend);
-          GC_printf1("\tref. count      = %lu\n", shl_desc->ref_count);
-#     endif
-
-      /* register shared library's data segment as a garbage collection root */
-        GC_add_roots_inner((char *) shl_desc->dstart,
-			   (char *) shl_desc->dend, TRUE);
-
-        index++;
-    }
-}
-#endif /* HPUX */
-
-#ifdef RS6000
-#pragma alloca
-#include <sys/ldr.h>
-#include <sys/errno.h>
-void GC_register_dynamic_libraries()
-{
-	int len;
-	char *ldibuf;
-	int ldibuflen;
-	struct ld_info *ldi;
-
-	ldibuf = alloca(ldibuflen = 8192);
-
-	while ( (len = loadquery(L_GETINFO,ldibuf,ldibuflen)) < 0) {
-		if (errno != ENOMEM) {
-			ABORT("loadquery failed");
-		}
-		ldibuf = alloca(ldibuflen *= 2);
-	}
-
-	ldi = (struct ld_info *)ldibuf;
-	while (ldi) {
-		len = ldi->ldinfo_next;
-		GC_add_roots_inner(
-				ldi->ldinfo_dataorg,
-				(unsigned long)ldi->ldinfo_dataorg
-			        + ldi->ldinfo_datasize,
-				TRUE);
-		ldi = len ? (struct ld_info *)((char *)ldi + len) : 0;
-	}
-}
-#endif /* RS6000 */
-
-
-
-#else /* !DYNAMIC_LOADING */
-
-#ifdef PCR
-
-#   include "il/PCR_IL.h"
-#   include "th/PCR_ThCtl.h"
-#   include "mm/PCR_MM.h"
-
-void GC_register_dynamic_libraries()
-{
-    /* Add new static data areas of dynamically loaded modules.	*/
-        {
-          PCR_IL_LoadedFile * p = PCR_IL_GetLastLoadedFile();
-          PCR_IL_LoadedSegment * q;
-          
-          /* Skip uncommited files */
-          while (p != NIL && !(p -> lf_commitPoint)) {
-              /* The loading of this file has not yet been committed	*/
-              /* Hence its description could be inconsistent.  		*/
-              /* Furthermore, it hasn't yet been run.  Hence its data	*/
-              /* segments can't possibly reference heap allocated	*/
-              /* objects.						*/
-              p = p -> lf_prev;
-          }
-          for (; p != NIL; p = p -> lf_prev) {
-            for (q = p -> lf_ls; q != NIL; q = q -> ls_next) {
-              if ((q -> ls_flags & PCR_IL_SegFlags_Traced_MASK)
-                  == PCR_IL_SegFlags_Traced_on) {
-                GC_add_roots_inner
-                	((char *)(q -> ls_addr), 
-                	 (char *)(q -> ls_addr) + q -> ls_bytes,
-                	 TRUE);
-              }
-            }
-          }
-        }
-}
-
-
-#else /* !PCR */
-
-void GC_register_dynamic_libraries(){}
-
-int GC_no_dynamic_loading;
-
-#endif /* !PCR */
-#endif /* !DYNAMIC_LOADING */