/* DO NOT EDIT THIS FILE -- it is automagically generated. -*- C -*- */ #define _MALLOC_INTERNAL /* The malloc headers and source files from the C library follow here. */ /* Declarations for `malloc' and friends. Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. Written May 1989 by Mike Haertel. This file is part of GNU Emacs. GNU Emacs is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Emacs is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Emacs; see the file COPYING. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_H #define _MALLOC_H 1 #ifdef __cplusplus extern "C" { #endif #if defined (__cplusplus) || (defined (__STDC__) && __STDC__) #undef __P #define __P(args) args #undef __const #define __const const #undef __ptr_t #define __ptr_t void * #else /* Not C++ or ANSI C. */ #undef __P #define __P(args) () #undef __const #define __const #undef __ptr_t #define __ptr_t char * #endif /* C++ or ANSI C. */ #ifndef NULL #define NULL 0 #endif #ifdef __STDC__ #include #else #ifdef VMS /* The following are defined in stdio.h, but we need it NOW! But do NOT do it with defines here, for then, VAX C is going to barf when it gets to stdio.h and the typedefs in there! */ typedef unsigned int size_t; typedef int ptrdiff_t; #else /* not VMS */ #undef size_t #define size_t unsigned int #undef ptrdiff_t #define ptrdiff_t int #endif /* VMS */ #endif /* Allocate SIZE bytes of memory. */ extern __ptr_t malloc __P ((size_t __size)); /* Re-allocate the previously allocated block in __ptr_t, making the new block SIZE bytes long. */ extern __ptr_t realloc __P ((__ptr_t __ptr, size_t __size)); /* Allocate NMEMB elements of SIZE bytes each, all initialized to 0. */ extern __ptr_t calloc __P ((size_t __nmemb, size_t __size)); /* Free a block allocated by `malloc', `realloc' or `calloc'. */ extern void free __P ((__ptr_t __ptr)); /* Allocate SIZE bytes allocated to ALIGNMENT bytes. */ extern __ptr_t memalign __P ((size_t __alignment, size_t __size)); /* Allocate SIZE bytes on a page boundary. */ extern __ptr_t valloc __P ((size_t __size)); #ifdef VMS /* VMS hooks to deal with two heaps */ /* Allocate SIZE bytes of memory. */ extern __ptr_t __vms_malloc __P ((size_t __size)); /* Re-allocate the previously allocated block in __ptr_t, making the new block SIZE bytes long. */ extern __ptr_t __vms_realloc __P ((__ptr_t __ptr, size_t __size)); /* Free a block allocated by `malloc', `realloc' or `calloc'. */ extern void __vms_free __P ((__ptr_t __ptr)); #endif #ifdef _MALLOC_INTERNAL #include /* Harmless, gets __GNU_LIBRARY__ defined. */ #if defined(HAVE_CONFIG_H) || defined(emacs) #include #endif #if defined(__GNU_LIBRARY__) || defined(STDC_HEADERS) || defined(USG) #include #else #ifndef memset #define memset(s, zero, n) bzero ((s), (n)) #endif #ifndef memcpy #define memcpy(d, s, n) bcopy ((s), (d), (n)) #endif #ifndef memmove #define memmove(d, s, n) bcopy ((s), (d), (n)) #endif #endif #if defined(__GNU_LIBRARY__) || defined(__STDC__) #include #else #define CHAR_BIT 8 #endif /* The allocator divides the heap into blocks of fixed size; large requests receive one or more whole blocks, and small requests receive a fragment of a block. Fragment sizes are powers of two, and all fragments of a block are the same size. When all the fragments in a block have been freed, the block itself is freed. */ #define INT_BIT (CHAR_BIT * sizeof(int)) #ifdef VMS #define BLOCKLOG 9 #else #define BLOCKLOG (INT_BIT > 16 ? 12 : 9) #endif #define BLOCKSIZE (1 << BLOCKLOG) #define BLOCKIFY(SIZE) (((SIZE) + BLOCKSIZE - 1) / BLOCKSIZE) /* Determine the amount of memory spanned by the initial heap table (not an absolute limit). */ #define HEAP (INT_BIT > 16 ? 4194304 : 65536) /* Number of contiguous free blocks allowed to build up at the end of memory before they will be returned to the system. */ #define FINAL_FREE_BLOCKS 8 /* Data structure giving per-block information. */ typedef union { /* Heap information for a busy block. */ struct { /* Zero for a large block, or positive giving the logarithm to the base two of the fragment size. */ int type; union { struct { size_t nfree; /* Free fragments in a fragmented block. */ size_t first; /* First free fragment of the block. */ } frag; /* Size (in blocks) of a large cluster. */ size_t size; } info; } busy; /* Heap information for a free block (that may be the first of a free cluster). */ struct { size_t size; /* Size (in blocks) of a free cluster. */ size_t next; /* Index of next free cluster. */ size_t prev; /* Index of previous free cluster. */ } free; } malloc_info; /* Pointer to first block of the heap. */ extern char *_heapbase; /* Table indexed by block number giving per-block information. */ extern malloc_info *_heapinfo; /* Address to block number and vice versa. */ #define BLOCK(A) (((char *) (A) - _heapbase) / BLOCKSIZE + 1) #define ADDRESS(B) ((__ptr_t) (((B) - 1) * BLOCKSIZE + _heapbase)) /* Current search index for the heap table. */ extern size_t _heapindex; /* Limit of valid info table indices. */ extern size_t _heaplimit; /* Doubly linked lists of free fragments. */ struct list { struct list *next; struct list *prev; }; /* Free list headers for each fragment size. */ extern struct list _fraghead[]; /* List of blocks allocated with `memalign' (or `valloc'). */ struct alignlist { struct alignlist *next; __ptr_t aligned; /* The address that memaligned returned. */ __ptr_t exact; /* The address that malloc returned. */ }; extern struct alignlist *_aligned_blocks; /* Instrumentation. */ extern size_t _chunks_used; extern size_t _bytes_used; extern size_t _chunks_free; extern size_t _bytes_free; /* Internal version of `free' used in `morecore' (malloc.c). */ extern void _free_internal __P ((__ptr_t __ptr)); #endif /* _MALLOC_INTERNAL. */ /* Underlying allocation function; successive calls should return contiguous pieces of memory. */ /* It does NOT always return contiguous pieces of memory on VMS. */ extern __ptr_t (*__morecore) __P ((ptrdiff_t __size)); /* Underlying deallocation function. It accepts both a pointer and a size to back up. It is implementation dependent what is really used. */ extern __ptr_t (*__lesscore) __P ((__ptr_t __ptr, ptrdiff_t __size)); /* Default value of `__morecore'. */ extern __ptr_t __default_morecore __P ((ptrdiff_t __size)); /* Default value of `__lesscore'. */ extern __ptr_t __default_lesscore __P ((__ptr_t __ptr, ptrdiff_t __size)); #ifdef VMS /* Default value of `__morecore'. */ extern __ptr_t __vms_morecore __P ((ptrdiff_t __size)); /* Default value of `__lesscore'. */ extern __ptr_t __vms_lesscore __P ((__ptr_t __ptr, ptrdiff_t __size)); #endif /* If not NULL, this function is called after each time `__morecore' is called to increase the data size. */ extern void (*__after_morecore_hook) __P ((void)); /* If not NULL, this function is called after each time `__lesscore' is called to increase the data size. */ extern void (*__after_lesscore_hook) __P ((void)); /* Nonzero if `malloc' has been called and done its initialization. */ extern int __malloc_initialized; /* Hooks for debugging versions. */ extern void (*__free_hook) __P ((__ptr_t __ptr)); extern __ptr_t (*__malloc_hook) __P ((size_t __size)); extern __ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, size_t __size)); /* Activate a standard collection of debugging hooks. */ extern int mcheck __P ((void (*__func) __P ((void)))); /* Activate a standard collection of tracing hooks. */ extern void mtrace __P ((void)); /* Statistics available to the user. */ struct mstats { size_t bytes_total; /* Total size of the heap. */ size_t chunks_used; /* Chunks allocated by the user. */ size_t bytes_used; /* Byte total of user-allocated chunks. */ size_t chunks_free; /* Chunks in the free list. */ size_t bytes_free; /* Byte total of chunks in the free list. */ }; /* Pick up the current statistics. */ extern struct mstats mstats __P ((void)); /* Call WARNFUN with a warning message when memory usage is high. */ extern void memory_warnings __P ((__ptr_t __start, void (*__warnfun) __P ((__const char *)))); /* Relocating allocator. */ /* Allocate SIZE bytes, and store the address in *HANDLEPTR. */ extern __ptr_t r_alloc __P ((__ptr_t *__handleptr, size_t __size)); /* Free the storage allocated in HANDLEPTR. */ extern void r_alloc_free __P ((__ptr_t *__handleptr)); /* Adjust the block at HANDLEPTR to be SIZE bytes long. */ extern __ptr_t r_re_alloc __P ((__ptr_t *__handleptr, size_t __size)); #ifdef __cplusplus } #endif #endif /* malloc.h */ /* Memory allocator `malloc'. Copyright 1990, 1991, 1992, 1993 Free Software Foundation Written May 1989 by Mike Haertel. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif #ifdef VMS /* How to really get more memory. */ __ptr_t (*__morecore) __P ((ptrdiff_t __size)) = __vms_morecore; #else /* How to really get more memory. */ __ptr_t (*__morecore) __P ((ptrdiff_t __size)) = __default_morecore; #endif /* Debugging hook for `malloc'. */ #ifdef VMS __ptr_t (*__malloc_hook) __P ((size_t __size)) = __vms_malloc; #else __ptr_t (*__malloc_hook) __P ((size_t __size)); #endif /* Pointer to the base of the first block. */ char *_heapbase; /* Block information table. Allocated with align/__free (not malloc/free). */ malloc_info *_heapinfo; /* Number of info entries. */ static size_t heapsize; /* Search index in the info table. */ size_t _heapindex; /* Limit of valid info table indices. */ size_t _heaplimit; /* Free lists for each fragment size. */ struct list _fraghead[BLOCKLOG]; /* Instrumentation. */ size_t _chunks_used; size_t _bytes_used; size_t _chunks_free; size_t _bytes_free; /* Are you experienced? */ int __malloc_initialized; void (*__after_morecore_hook) __P ((void)); /* Aligned allocation. */ static __ptr_t align __P ((size_t)); static __ptr_t align (size) size_t size; { __ptr_t result; unsigned long int adj; result = (*__morecore) (size); adj = (unsigned long int) ((unsigned long int) ((char *) result - (char *) NULL)) % BLOCKSIZE; if (adj != 0) { adj = BLOCKSIZE - adj; (void) (*__morecore) (adj); result = (char *) result + adj; } if (__after_morecore_hook) (*__after_morecore_hook) (); return result; } /* Set everything up and remember that we have. */ static int initialize __P ((void)); static int initialize () { #ifdef RL_DEBUG extern VMS_present_buffer(); printf("__malloc_initialized = %d\n", __malloc_initialized); VMS_present_buffer(); #endif heapsize = HEAP / BLOCKSIZE; _heapinfo = (malloc_info *) align (heapsize * sizeof (malloc_info)); if (_heapinfo == NULL) return 0; memset (_heapinfo, 0, heapsize * sizeof (malloc_info)); _heapinfo[0].free.size = 0; _heapinfo[0].free.next = _heapinfo[0].free.prev = 0; _heapindex = 0; _heapbase = (char *) _heapinfo; #ifdef RL_DEBUG /* debug */ printf("_heapbase = 0%o/0x%x/%d\n", _heapbase, _heapbase, _heapbase); /* end debug */ #endif __malloc_initialized = 1; return 1; } /* Get neatly aligned memory, initializing or growing the heap info table as necessary. */ static __ptr_t morecore __P ((size_t)); static __ptr_t morecore (size) size_t size; { __ptr_t result; malloc_info *newinfo, *oldinfo; size_t newsize; result = align (size); if (result == NULL) return NULL; /* Check if we need to grow the info table. */ if ((size_t) BLOCK ((char *) result + size) > heapsize) { newsize = heapsize; while ((size_t) BLOCK ((char *) result + size) > newsize) newsize *= 2; newinfo = (malloc_info *) align (newsize * sizeof (malloc_info)); if (newinfo == NULL) { (*__lesscore) (result, size); return NULL; } memset (newinfo, 0, newsize * sizeof (malloc_info)); memcpy (newinfo, _heapinfo, heapsize * sizeof (malloc_info)); oldinfo = _heapinfo; newinfo[BLOCK (oldinfo)].busy.type = 0; newinfo[BLOCK (oldinfo)].busy.info.size = BLOCKIFY (heapsize * sizeof (malloc_info)); _heapinfo = newinfo; _free_internal (oldinfo); heapsize = newsize; } _heaplimit = BLOCK ((char *) result + size); return result; } /* Allocate memory from the heap. */ __ptr_t malloc (size) size_t size; { __ptr_t result; size_t block, blocks, lastblocks, start; register size_t i; struct list *next; if (size == 0) return NULL; if (__malloc_hook != NULL) return (*__malloc_hook) (size); if (!__malloc_initialized) if (!initialize ()) return NULL; if (size < sizeof (struct list)) size = sizeof (struct list); /* Determine the allocation policy based on the request size. */ if (size <= BLOCKSIZE / 2) { /* Small allocation to receive a fragment of a block. Determine the logarithm to base two of the fragment size. */ register size_t log = 1; --size; while ((size /= 2) != 0) ++log; /* Look in the fragment lists for a free fragment of the desired size. */ next = _fraghead[log].next; if (next != NULL) { /* There are free fragments of this size. Pop a fragment out of the fragment list and return it. Update the block's nfree and first counters. */ result = (__ptr_t) next; next->prev->next = next->next; if (next->next != NULL) next->next->prev = next->prev; block = BLOCK (result); if (--_heapinfo[block].busy.info.frag.nfree != 0) _heapinfo[block].busy.info.frag.first = (unsigned long int) ((unsigned long int) ((char *) next->next - (char *) NULL) % BLOCKSIZE) >> log; /* Update the statistics. */ ++_chunks_used; _bytes_used += 1 << log; --_chunks_free; _bytes_free -= 1 << log; } else { /* No free fragments of the desired size, so get a new block and break it into fragments, returning the first. */ result = malloc (BLOCKSIZE); if (result == NULL) return NULL; /* Link all fragments but the first into the free list. */ for (i = 1; i < (size_t) (BLOCKSIZE >> log); ++i) { next = (struct list *) ((char *) result + (i << log)); #ifdef RL_DEBUG printf("DEBUG: malloc (%d): next = %p\n", size, next); #endif next->next = _fraghead[log].next; next->prev = &_fraghead[log]; next->prev->next = next; if (next->next != NULL) next->next->prev = next; } /* Initialize the nfree and first counters for this block. */ block = BLOCK (result); _heapinfo[block].busy.type = log; _heapinfo[block].busy.info.frag.nfree = i - 1; _heapinfo[block].busy.info.frag.first = i - 1; _chunks_free += (BLOCKSIZE >> log) - 1; _bytes_free += BLOCKSIZE - (1 << log); _bytes_used -= BLOCKSIZE - (1 << log); } } else { /* Large allocation to receive one or more blocks. Search the free list in a circle starting at the last place visited. If we loop completely around without finding a large enough space we will have to get more memory from the system. */ blocks = BLOCKIFY (size); start = block = _heapindex; while (_heapinfo[block].free.size < blocks) { block = _heapinfo[block].free.next; if (block == start) { /* Need to get more from the system. Check to see if the new core will be contiguous with the final free block; if so we don't need to get as much. */ block = _heapinfo[0].free.prev; lastblocks = _heapinfo[block].free.size; if (_heaplimit != 0 && block + lastblocks == _heaplimit && (*__morecore) (0) == ADDRESS (block + lastblocks) && (morecore ((blocks - lastblocks) * BLOCKSIZE)) != NULL) { _heapinfo[block].free.size = blocks; _bytes_free += (blocks - lastblocks) * BLOCKSIZE; continue; } result = morecore (blocks * BLOCKSIZE); if (result == NULL) return NULL; block = BLOCK (result); _heapinfo[block].busy.type = 0; _heapinfo[block].busy.info.size = blocks; ++_chunks_used; _bytes_used += blocks * BLOCKSIZE; return result; } } /* At this point we have found a suitable free list entry. Figure out how to remove what we need from the list. */ result = ADDRESS (block); if (_heapinfo[block].free.size > blocks) { /* The block we found has a bit left over, so relink the tail end back into the free list. */ _heapinfo[block + blocks].free.size = _heapinfo[block].free.size - blocks; _heapinfo[block + blocks].free.next = _heapinfo[block].free.next; _heapinfo[block + blocks].free.prev = _heapinfo[block].free.prev; _heapinfo[_heapinfo[block].free.prev].free.next = _heapinfo[_heapinfo[block].free.next].free.prev = _heapindex = block + blocks; } else { /* The block exactly matches our requirements, so just remove it from the list. */ _heapinfo[_heapinfo[block].free.next].free.prev = _heapinfo[block].free.prev; _heapinfo[_heapinfo[block].free.prev].free.next = _heapindex = _heapinfo[block].free.next; --_chunks_free; } _heapinfo[block].busy.type = 0; _heapinfo[block].busy.info.size = blocks; ++_chunks_used; _bytes_used += blocks * BLOCKSIZE; _bytes_free -= blocks * BLOCKSIZE; } return result; } /* Free a block of memory allocated by `malloc'. Copyright 1990, 1991, 1992 Free Software Foundation Written May 1989 by Mike Haertel. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif #ifdef VMS /* How to really get more memory. */ __ptr_t (*__lesscore) __P ((__ptr_t __ptr,ptrdiff_t __size)) = __vms_lesscore; #else /* How to really get more memory. */ __ptr_t (*__lesscore) __P ((__ptr_t __ptr,ptrdiff_t __size)) = __default_lesscore; #endif /* Debugging hook for free. */ #ifdef VMS void (*__free_hook) __P ((__ptr_t __ptr)) = __vms_free; #else void (*__free_hook) __P ((__ptr_t __ptr)); #endif /* List of blocks allocated by memalign. */ struct alignlist *_aligned_blocks = NULL; /* Return memory to the heap. Like `free' but don't call a __free_hook if there is one. */ void _free_internal (ptr) __ptr_t ptr; { int type; size_t block, blocks; register size_t i; struct list *prev, *next; block = BLOCK (ptr); type = _heapinfo[block].busy.type; switch (type) { case 0: /* Get as many statistics as early as we can. */ --_chunks_used; _bytes_used -= _heapinfo[block].busy.info.size * BLOCKSIZE; _bytes_free += _heapinfo[block].busy.info.size * BLOCKSIZE; /* Find the free cluster previous to this one in the free list. Start searching at the last block referenced; this may benefit programs with locality of allocation. */ i = _heapindex; if (i > block) while (i > block) i = _heapinfo[i].free.prev; else { do i = _heapinfo[i].free.next; while (i > 0 && i < block); i = _heapinfo[i].free.prev; } /* Determine how to link this block into the free list. */ if (block == i + _heapinfo[i].free.size) { /* Coalesce this block with its predecessor. */ _heapinfo[i].free.size += _heapinfo[block].busy.info.size; block = i; } else { /* Really link this block back into the free list. */ _heapinfo[block].free.size = _heapinfo[block].busy.info.size; _heapinfo[block].free.next = _heapinfo[i].free.next; _heapinfo[block].free.prev = i; _heapinfo[i].free.next = block; _heapinfo[_heapinfo[block].free.next].free.prev = block; ++_chunks_free; } /* Now that the block is linked in, see if we can coalesce it with its successor (by deleting its successor from the list and adding in its size). */ if (block + _heapinfo[block].free.size == _heapinfo[block].free.next) { _heapinfo[block].free.size += _heapinfo[_heapinfo[block].free.next].free.size; _heapinfo[block].free.next = _heapinfo[_heapinfo[block].free.next].free.next; _heapinfo[_heapinfo[block].free.next].free.prev = block; --_chunks_free; } /* Now see if we can return stuff to the system. */ blocks = _heapinfo[block].free.size; if (blocks >= FINAL_FREE_BLOCKS && block + blocks == _heaplimit && (*__morecore) (0) == ADDRESS (block + blocks)) { register size_t bytes = blocks * BLOCKSIZE; _heaplimit -= blocks; (*__lesscore) (ADDRESS(block), bytes); _heapinfo[_heapinfo[block].free.prev].free.next = _heapinfo[block].free.next; _heapinfo[_heapinfo[block].free.next].free.prev = _heapinfo[block].free.prev; block = _heapinfo[block].free.prev; --_chunks_free; _bytes_free -= bytes; } /* Set the next search to begin at this block. */ _heapindex = block; break; default: /* Do some of the statistics. */ --_chunks_used; _bytes_used -= 1 << type; ++_chunks_free; _bytes_free += 1 << type; /* Get the address of the first free fragment in this block. */ prev = (struct list *) ((char *) ADDRESS (block) + (_heapinfo[block].busy.info.frag.first << type)); #ifdef RL_DEBUG printf("_free_internal(0%o/0x%x/%d) :\n", ptr, ptr, ptr); printf(" block = %d, type = %d, prev = 0%o/0x%x/%d\n", block, type, prev, prev, prev); printf(" _heapinfo[block=%d].busy.info.frag.nfree = %d\n", block, _heapinfo[block].busy.info.frag.nfree); #endif if (_heapinfo[block].busy.info.frag.nfree == (BLOCKSIZE >> type) - 1) { /* If all fragments of this block are free, remove them from the fragment list and free the whole block. */ next = prev; for (i = 1; i < (size_t) (BLOCKSIZE >> type); ++i) next = next->next; prev->prev->next = next; if (next != NULL) next->prev = prev->prev; _heapinfo[block].busy.type = 0; _heapinfo[block].busy.info.size = 1; /* Keep the statistics accurate. */ ++_chunks_used; _bytes_used += BLOCKSIZE; _chunks_free -= BLOCKSIZE >> type; _bytes_free -= BLOCKSIZE; free (ADDRESS (block)); } else if (_heapinfo[block].busy.info.frag.nfree != 0) { /* If some fragments of this block are free, link this fragment into the fragment list after the first free fragment of this block. */ #ifdef RL_DEBUG printf("There's a bug hiding here (%s:%d), so I will print some values\n", __FILE__, __LINE__); #endif next = (struct list *) ptr; #ifdef RL_DEBUG printf(" (struct list *)next (0%o / 0x%x / %d) ->\n", next, next, next); printf(" next = 0%o / 0x%x / %d\n", next->next,next->next,next->next); printf(" prev = 0%o / 0x%x / %d\n", next->prev,next->prev,next->prev); printf(" (struct list *)prev (0%o / 0x%x / %d)->\n", prev, prev, prev); printf(" next = 0%o / 0x%x / %d\n", prev->next,prev->next,prev->next); printf(" prev = 0%o / 0x%x / %d\n", prev->prev,prev->prev,prev->prev); #endif next->next = prev->next; next->prev = prev; prev->next = next; if (next->next != NULL) next->next->prev = next; ++_heapinfo[block].busy.info.frag.nfree; } else { /* No fragments of this block are free, so link this fragment into the fragment list and announce that it is the first free fragment of this block. */ prev = (struct list *) ptr; _heapinfo[block].busy.info.frag.nfree = 1; _heapinfo[block].busy.info.frag.first = (unsigned long int) ((unsigned long int) ((char *) ptr - (char *) NULL) % BLOCKSIZE >> type); prev->next = _fraghead[type].next; prev->prev = &_fraghead[type]; prev->prev->next = prev; if (prev->next != NULL) prev->next->prev = prev; } break; } } /* Return memory to the heap. */ void free (ptr) __ptr_t ptr; { register struct alignlist *l; if (ptr == NULL) return; for (l = _aligned_blocks; l != NULL; l = l->next) if (l->aligned == ptr) { l->aligned = NULL; /* Mark the slot in the list as free. */ ptr = l->exact; break; } if (__free_hook != NULL) (*__free_hook) (ptr); else _free_internal (ptr); } /* Change the size of a block allocated by `malloc'. Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc. Written May 1989 by Mike Haertel. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif #define min(A, B) ((A) < (B) ? (A) : (B)) /* Debugging hook for realloc. */ #ifdef VMS __ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, size_t __size)) = __vms_realloc; #else __ptr_t (*__realloc_hook) __P ((__ptr_t __ptr, size_t __size)); #endif /* Resize the given region to the new size, returning a pointer to the (possibly moved) region. This is optimized for speed; some benchmarks seem to indicate that greater compactness is achieved by unconditionally allocating and copying to a new region. This module has incestuous knowledge of the internals of both free and malloc. */ __ptr_t realloc (ptr, size) __ptr_t ptr; size_t size; { __ptr_t result; int type; size_t block, blocks, oldlimit; if (size == 0) { free (ptr); return malloc (0); } else if (ptr == NULL) return malloc (size); if (__realloc_hook != NULL) return (*__realloc_hook) (ptr, size); block = BLOCK (ptr); type = _heapinfo[block].busy.type; switch (type) { case 0: /* Maybe reallocate a large block to a small fragment. */ if (size <= BLOCKSIZE / 2) { result = malloc (size); if (result != NULL) { memcpy (result, ptr, size); free (ptr); return result; } } /* The new size is a large allocation as well; see if we can hold it in place. */ blocks = BLOCKIFY (size); if (blocks < _heapinfo[block].busy.info.size) { /* The new size is smaller; return excess memory to the free list. */ _heapinfo[block + blocks].busy.type = 0; _heapinfo[block + blocks].busy.info.size = _heapinfo[block].busy.info.size - blocks; _heapinfo[block].busy.info.size = blocks; free (ADDRESS (block + blocks)); result = ptr; } else if (blocks == _heapinfo[block].busy.info.size) /* No size change necessary. */ result = ptr; else { /* Won't fit, so allocate a new region that will. Free the old region first in case there is sufficient adjacent free space to grow without moving. */ blocks = _heapinfo[block].busy.info.size; /* Prevent free from actually returning memory to the system. */ oldlimit = _heaplimit; _heaplimit = 0; free (ptr); _heaplimit = oldlimit; result = malloc (size); if (result == NULL) { /* Now we're really in trouble. We have to unfree the thing we just freed. Unfortunately it might have been coalesced with its neighbors. */ if (_heapindex == block) (void) malloc (blocks * BLOCKSIZE); else { __ptr_t previous = malloc ((block - _heapindex) * BLOCKSIZE); (void) malloc (blocks * BLOCKSIZE); free (previous); } return NULL; } if (ptr != result) memmove (result, ptr, blocks * BLOCKSIZE); } break; default: /* Old size is a fragment; type is logarithm to base two of the fragment size. */ if (size > (size_t) (1 << (type - 1)) && size <= (size_t) (1 << type)) /* The new size is the same kind of fragment. */ result = ptr; else { /* The new size is different; allocate a new space, and copy the lesser of the new size and the old. */ result = malloc (size); if (result == NULL) return NULL; memcpy (result, ptr, min (size, (size_t) 1 << type)); free (ptr); } break; } return result; } /* Copyright (C) 1991, 1992 Free Software Foundation, Inc. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif /* Allocate an array of NMEMB elements each SIZE bytes long. The entire array is initialized to zeros. */ __ptr_t calloc (nmemb, size) register size_t nmemb; register size_t size; { register __ptr_t result = malloc (nmemb * size); if (result != NULL) (void) memset (result, 0, nmemb * size); return result; } /* Copyright (C) 1991, 1992 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with the GNU C Library; see the file COPYING. If not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif #ifndef __GNU_LIBRARY__ #define __sbrk sbrk #ifdef VMS #define __brk brk #endif #endif extern __ptr_t __sbrk __P ((int increment)); #ifndef NULL #define NULL 0 #endif #if defined(emacs) && defined(VMS) /* Dumping of Emacs on VMS does not include the heap! So let's make a huge array from which initial data will be allocated. VMS_ALLOCATION_SIZE is the amount of memory we preallocate. We don't want it to be too large, because it only gives a larger dump file. The way to check how much is really used is to make VMS_ALLOCATION_SIZE very large, to link Emacs with the debugger, run Emacs, check how much was allocated. Then set VMS_ALLOCATION_SIZE to something suitable, recompile gmalloc, relink Emacs, and you should be off. N.B. This is experimental, but it worked quite fine on Emacs 18. */ #ifndef VMS_ALLOCATION_SIZE #define VMS_ALLOCATION_SIZE (512*(512+128)) #endif int vms_out_initial = 0; char vms_initial_buffer[VMS_ALLOCATION_SIZE]; char *vms_current_brk = vms_initial_buffer; char *vms_end_brk = &vms_initial_buffer[VMS_ALLOCATION_SIZE-1]; __ptr_t __vms_initial_morecore (increment) ptrdiff_t increment; { __ptr_t result = NULL; __ptr_t temp; /* It's far easier to make the alignment here than to make a kludge in align () */ #ifdef RL_DEBUG printf(">>>foo... %p...", vms_current_brk); #endif vms_current_brk += (BLOCKSIZE - ((unsigned long) vms_current_brk & (BLOCKSIZE - 1))) & (BLOCKSIZE - 1); #ifdef RL_DEBUG printf("bar... %p. (%d)\n", vms_current_brk, increment); #endif temp = vms_current_brk + (int) increment; if (temp <= vms_end_brk) { if (increment >= 0) result = vms_current_brk; else result = temp; vms_current_brk = temp; } return result; } __ptr_t __vms_initial_lesscore (ptr, size) __ptr_t ptr; ptrdiff_t size; { if (ptr >= vms_initial_buffer && ptr < vms_initial_buffer+VMS_ALLOCATION_SIZE) { vms_current_brk = ptr; return vms_current_brk; } return vms_current_brk; } VMS_present_buffer() { printf("Vms initial buffer starts at 0%o/0x%x/%d and ends at 0%o/0x%x/%d\n", vms_initial_buffer, vms_initial_buffer, vms_initial_buffer, vms_end_brk, vms_end_brk, vms_end_brk); } #endif /* defined(emacs) && defined(VMS) */ #ifdef VMS /* Unfortunately, the VAX C sbrk() is buggy. For example, it returns memory in 512 byte chunks (not a bug, but there's more), AND it adds an extra 512 byte chunk if you ask for a multiple of 512 bytes (you ask for 512 bytes, you get 1024 bytes...). And also, the VAX C sbrk does not handle negative increments... There's a similar problem with brk(). Even if you set the break to an even page boundary, it gives you one extra page... */ static char vms_brk_info_fetched = -1; /* -1 if this is the first time, otherwise bit 0 set if 'increment' needs adjustment bit 1 set if the value to brk() needs adjustment */ static char *vms_brk_start = 0; static char *vms_brk_end = 0; static char *vms_brk_current = 0; #endif /* Allocate INCREMENT more bytes of data space, and return the start of data space, or NULL on errors. If INCREMENT is negative, shrink data space. */ __ptr_t __default_morecore (increment) ptrdiff_t increment; { __ptr_t result; #ifdef VMS __ptr_t temp; #ifdef RL_DEBUG printf("DEBUG: morecore: increment = %x\n", increment); printf(" @ start: vms_brk_info_fetched = %x\n", vms_brk_info_fetched); printf(" vms_brk_start = %p\n", vms_brk_start); printf(" vms_brk_current = %p\n", vms_brk_current); printf(" vms_brk_end = %p\n", vms_brk_end); printf(" @ end: "); #endif if (vms_brk_info_fetched < 0) { vms_brk_current = vms_brk_start = __sbrk (512); vms_brk_end = __sbrk (0); if (vms_brk_end - vms_brk_current == 1024) vms_brk_info_fetched = 1; else vms_brk_info_fetched = 0; vms_brk_end = brk(vms_brk_start); if (vms_brk_end != vms_brk_start) vms_brk_info_fetched |= 2; #ifdef RL_DEBUG printf("vms_brk_info_fetched = %x\n", vms_brk_info_fetched); printf(" vms_brk_start = %p\n", vms_brk_start); printf(" vms_brk_current = %p\n", vms_brk_current); printf(" vms_brk_end = %p\n", vms_brk_end); printf(" "); #endif } if (increment < 0) { printf("BZZZZZT! ERROR: __default_morecore does NOT take negative args\n"); return NULL; } if (increment > 0) { result = vms_brk_current; temp = vms_brk_current + increment; if (temp > vms_brk_end) { __ptr_t foo; foo = __sbrk (0); if (foo == vms_brk_end) { increment = temp - vms_brk_end; if (increment > (vms_brk_info_fetched & 1)) increment -= (vms_brk_info_fetched & 1); foo = __sbrk(increment); #ifdef RL_DEBUG printf("__sbrk(%d) --> %p\n", increment, foo); #endif if (foo == (__ptr_t) -1) return NULL; #ifdef RL_DEBUG printf(" "); #endif } else { result = __sbrk (increment); if (result == (__ptr_t) -1) return NULL; temp = result + increment; } vms_brk_end = __sbrk(0); } vms_brk_current = temp; #ifdef RL_DEBUG printf("vms_brk_current = %p\n", vms_brk_current); printf(" vms_brk_end = %p\n", vms_brk_end); #endif return result; } #ifdef RL_DEBUG printf(" nothing more...\n"); #endif /* OK, so the user wanted to check where the heap limit is. Let's see if the system thinks it is where we think it is. */ temp = __sbrk (0); if (temp != vms_brk_end) { /* the value has changed. Let's trust the system and modify our value */ vms_brk_current = vms_brk_end = temp; } return vms_brk_current; #else /* not VMS */ result = __sbrk ((int) increment); if (result == (__ptr_t) -1) return NULL; return result; #endif /* VMS */ } __ptr_t __default_lesscore (ptr, size) __ptr_t ptr; ptrdiff_t size; { #ifdef VMS if (vms_brk_end != 0) { vms_brk_current = ptr; if (vms_brk_current < vms_brk_start) vms_brk_current = vms_brk_start; vms_brk_end = (char *) vms_brk_current - ((vms_brk_info_fetched >> 1) & 1); #ifdef RL_DEBUG printf("<< #endif #if defined (emacs) || defined (HAVE_CONFIG_H) #include "config.h" #endif #ifdef __GNU_LIBRARY__ extern size_t __getpagesize __P ((void)); #else #if !defined(USG) && !defined(VMS) extern size_t getpagesize __P ((void)); #define __getpagesize() getpagesize() #else #include #ifdef EXEC_PAGESIZE #define __getpagesize() EXEC_PAGESIZE #else /* No EXEC_PAGESIZE. */ #ifdef NBPG #ifndef CLSIZE #define CLSIZE 1 #endif /* No CLSIZE. */ #define __getpagesize() (NBPG * CLSIZE) #else /* No NBPG. */ #define __getpagesize() NBPC #endif /* NBPG. */ #endif /* EXEC_PAGESIZE. */ #endif /* USG. */ #endif static size_t pagesize; __ptr_t valloc (size) size_t size; { if (pagesize == 0) pagesize = __getpagesize (); return memalign (pagesize, size); } /* Copyright (C) 1991, 1992 Free Software Foundation, Inc. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif __ptr_t memalign (alignment, size) size_t alignment; size_t size; { __ptr_t result; unsigned long int adj; size = ((size + alignment - 1) / alignment) * alignment; result = malloc (size); if (result == NULL) return NULL; adj = (unsigned long int) ((unsigned long int) ((char *) result - (char *) NULL)) % alignment; if (adj != 0) { struct alignlist *l; for (l = _aligned_blocks; l != NULL; l = l->next) if (l->aligned == NULL) /* This slot is free. Use it. */ break; if (l == NULL) { l = (struct alignlist *) malloc (sizeof (struct alignlist)); if (l == NULL) { free (result); return NULL; } } l->exact = result; result = l->aligned = (char *) result + alignment - adj; l->next = _aligned_blocks; _aligned_blocks = l; } return result; } #ifdef VMS struct vms_malloc_data { int __malloc_initialized; char *_heapbase; malloc_info *_heapinfo; size_t heapsize; size_t _heapindex; size_t _heaplimit; size_t _chunks_used; size_t _bytes_used; size_t _chunks_free; size_t _bytes_free; } ____vms_malloc_data[] = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }, { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }; struct vms_core_routines { __ptr_t (*__morecore) __P ((ptrdiff_t increment)); __ptr_t (*__lesscore) __P ((__ptr_t address, ptrdiff_t increment)); } ____vms_core_routines[] = { { __vms_initial_morecore, __vms_initial_lesscore }, { __default_morecore, __default_lesscore }, { 0, 0 } }; static int current_vms_data = -1; static int current_vms_core_routines = 0; static void use_vms_core_routines (int i) { current_vms_core_routines = i; current_vms_data = i; } static void use_vms_data (int i) { use_vms_core_routines (i); __malloc_initialized = ____vms_malloc_data[i].__malloc_initialized; _heapbase = ____vms_malloc_data[i]._heapbase; _heapinfo = ____vms_malloc_data[i]._heapinfo; heapsize = ____vms_malloc_data[i].heapsize; _heapindex = ____vms_malloc_data[i]._heapindex; _heaplimit = ____vms_malloc_data[i]._heaplimit; _chunks_used = ____vms_malloc_data[i]._chunks_used; _bytes_used = ____vms_malloc_data[i]._bytes_used; _chunks_free = ____vms_malloc_data[i]._chunks_free; _bytes_free = ____vms_malloc_data[i]._bytes_free; } static void store_vms_data (int i) { ____vms_malloc_data[i].__malloc_initialized = __malloc_initialized; ____vms_malloc_data[i]._heapbase = _heapbase; ____vms_malloc_data[i]._heapinfo = _heapinfo; ____vms_malloc_data[i].heapsize = heapsize; ____vms_malloc_data[i]._heapindex = _heapindex; ____vms_malloc_data[i]._heaplimit = _heaplimit; ____vms_malloc_data[i]._chunks_used = _chunks_used; ____vms_malloc_data[i]._bytes_used = _bytes_used; ____vms_malloc_data[i]._chunks_free = _chunks_free; ____vms_malloc_data[i]._bytes_free = _bytes_free; } static void store_current_vms_data () { switch (current_vms_data) { case 0: case 1: store_vms_data (current_vms_data); break; } } __ptr_t __vms_morecore (increment) ptrdiff_t increment; { return (*____vms_core_routines[current_vms_core_routines].__morecore) (increment); } __ptr_t __vms_lesscore (ptr, increment) __ptr_t ptr; ptrdiff_t increment; { return (*____vms_core_routines[current_vms_core_routines].__lesscore) (ptr,increment); } __ptr_t __vms_malloc (size) size_t size; { __ptr_t result; int old_current_vms_data = current_vms_data; __malloc_hook = 0; store_current_vms_data (); if (____vms_malloc_data[0]._heapbase != 0) use_vms_data (0); else use_vms_core_routines (0); result = malloc (size); store_vms_data (0); if (result == NULL) { use_vms_data (1); result = malloc (size); store_vms_data (1); vms_out_initial = 1; } __malloc_hook = __vms_malloc; if (old_current_vms_data != -1) use_vms_data (current_vms_data); return result; } void __vms_free (ptr) __ptr_t ptr; { int old_current_vms_data = current_vms_data; __free_hook = 0; store_current_vms_data (); if (ptr >= vms_initial_buffer && ptr <= vms_end_brk) { use_vms_data (0); free (ptr); store_vms_data (0); } else { use_vms_data (1); free (ptr); store_vms_data (1); if (_chunks_free == 0 && _chunks_used == 0) vms_out_initial = 0; } __free_hook = __vms_free; if (old_current_vms_data != -1) use_vms_data (current_vms_data); } __ptr_t __vms_realloc (ptr, size) __ptr_t ptr; size_t size; { __ptr_t result; int old_current_vms_data = current_vms_data; __realloc_hook = 0; store_current_vms_data (); if (ptr >= vms_initial_buffer && ptr <= vms_end_brk) { use_vms_data (0); result = realloc (ptr, size); store_vms_data (0); } else { use_vms_data (1); result = realloc (ptr, size); store_vms_data (1); } __realloc_hook = __vms_realloc; if (old_current_vms_data != -1) use_vms_data (current_vms_data); return result; } #endif /* VMS */ /* Standard debugging hooks for `malloc'. Copyright 1990, 1991, 1992 Free Software Foundation Written May 1989 by Mike Haertel. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif /* Old hook values. */ static void (*old_free_hook) __P ((__ptr_t ptr)); static __ptr_t (*old_malloc_hook) __P ((size_t size)); static __ptr_t (*old_realloc_hook) __P ((__ptr_t ptr, size_t size)); /* Function to call when something awful happens. */ static void (*abortfunc) __P ((void)); /* Arbitrary magical numbers. */ #define MAGICWORD 0xfedabeeb #define MAGICBYTE ((char) 0xd7) struct hdr { size_t size; /* Exact size requested by user. */ unsigned long int magic; /* Magic number to check header integrity. */ }; static void checkhdr __P ((__const struct hdr *)); static void checkhdr (hdr) __const struct hdr *hdr; { if (hdr->magic != MAGICWORD || ((char *) &hdr[1])[hdr->size] != MAGICBYTE) (*abortfunc) (); } static void freehook __P ((__ptr_t)); static void freehook (ptr) __ptr_t ptr; { struct hdr *hdr = ((struct hdr *) ptr) - 1; checkhdr (hdr); hdr->magic = 0; __free_hook = old_free_hook; free (hdr); __free_hook = freehook; } static __ptr_t mallochook __P ((size_t)); static __ptr_t mallochook (size) size_t size; { struct hdr *hdr; __malloc_hook = old_malloc_hook; hdr = (struct hdr *) malloc (sizeof (struct hdr) + size + 1); __malloc_hook = mallochook; if (hdr == NULL) return NULL; hdr->size = size; hdr->magic = MAGICWORD; ((char *) &hdr[1])[size] = MAGICBYTE; return (__ptr_t) (hdr + 1); } static __ptr_t reallochook __P ((__ptr_t, size_t)); static __ptr_t reallochook (ptr, size) __ptr_t ptr; size_t size; { struct hdr *hdr = ((struct hdr *) ptr) - 1; checkhdr (hdr); __free_hook = old_free_hook; __malloc_hook = old_malloc_hook; __realloc_hook = old_realloc_hook; hdr = (struct hdr *) realloc ((__ptr_t) hdr, sizeof (struct hdr) + size + 1); __free_hook = freehook; __malloc_hook = mallochook; __realloc_hook = reallochook; if (hdr == NULL) return NULL; hdr->size = size; ((char *) &hdr[1])[size] = MAGICBYTE; return (__ptr_t) (hdr + 1); } int mcheck (func) void (*func) __P ((void)); { extern void abort __P ((void)); static int mcheck_used = 0; abortfunc = (func != NULL) ? func : abort; /* These hooks may not be safely inserted if malloc is already in use. */ if (!__malloc_initialized && !mcheck_used) { old_free_hook = __free_hook; __free_hook = freehook; old_malloc_hook = __malloc_hook; __malloc_hook = mallochook; old_realloc_hook = __realloc_hook; __realloc_hook = reallochook; mcheck_used = 1; } return mcheck_used ? 0 : -1; } /* More debugging hooks for `malloc'. Copyright (C) 1991, 1992 Free Software Foundation, Inc. Written April 2, 1991 by John Gilmore of Cygnus Support. Based on mcheck.c by Mike Haertel. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif #include #ifndef __GNU_LIBRARY__ extern char *getenv (); #else #include #endif static FILE *mallstream; static char mallenv[]= "MALLOC_TRACE"; static char mallbuf[BUFSIZ]; /* Buffer for the output. */ /* Address to breakpoint on accesses to... */ __ptr_t mallwatch; /* Old hook values. */ static __ptr_t (*tr_old_morecore) __P ((ptrdiff_t increment)); static __ptr_t (*tr_old_lesscore) __P ((__ptr_t ptr, ptrdiff_t increment)); static void (*tr_old_free_hook) __P ((__ptr_t ptr)); static __ptr_t (*tr_old_malloc_hook) __P ((size_t size)); static __ptr_t (*tr_old_realloc_hook) __P ((__ptr_t ptr, size_t size)); /* This function is called when the block being alloc'd, realloc'd, or freed has an address matching the variable "mallwatch". In a debugger, set "mallwatch" to the address of interest, then put a breakpoint on tr_break. */ void tr_break __P ((void)); void tr_break () { } static void tr_freehook __P ((__ptr_t)); static void tr_freehook (ptr) __ptr_t ptr; { fprintf (mallstream, "- %p\n", ptr); /* Be sure to print it first. */ if (ptr == mallwatch) tr_break (); __free_hook = tr_old_free_hook; free (ptr); __free_hook = tr_freehook; } static __ptr_t tr_morecore __P ((ptrdiff_t)); static __ptr_t tr_morecore (increment) ptrdiff_t increment; { __ptr_t p; __morecore = tr_old_morecore; p = (__ptr_t) (*__morecore) (increment); __morecore = tr_morecore; fprintf (mallstream, "$ %p %d\n", p, increment); return p; } static __ptr_t tr_lesscore __P ((__ptr_t, ptrdiff_t)); static __ptr_t tr_lesscore (ptr, increment) __ptr_t ptr; ptrdiff_t increment; { __ptr_t p; __lesscore = tr_old_lesscore; p = (__ptr_t) (*__lesscore) (ptr, increment); __lesscore = tr_lesscore; fprintf (mallstream, "* %p (%p, %d)\n", p, ptr, increment); return p; } static __ptr_t tr_mallochook __P ((size_t)); static __ptr_t tr_mallochook (size) size_t size; { __ptr_t hdr; __malloc_hook = tr_old_malloc_hook; hdr = (__ptr_t) malloc (size); __malloc_hook = tr_mallochook; /* We could be printing a NULL here; that's OK. */ fprintf (mallstream, "+ %p %x\n", hdr, size); if (hdr == mallwatch) tr_break (); return hdr; } static __ptr_t tr_reallochook __P ((__ptr_t, size_t)); static __ptr_t tr_reallochook (ptr, size) __ptr_t ptr; size_t size; { __ptr_t hdr; if (ptr == mallwatch) tr_break (); __free_hook = tr_old_free_hook; __malloc_hook = tr_old_malloc_hook; __realloc_hook = tr_old_realloc_hook; hdr = (__ptr_t) realloc (ptr, size); __free_hook = tr_freehook; __malloc_hook = tr_mallochook; __realloc_hook = tr_reallochook; if (hdr == NULL) /* Failed realloc. */ fprintf (mallstream, "! %p %x\n", ptr, size); else fprintf (mallstream, "< %p\n> %p %x\n", ptr, hdr, size); if (hdr == mallwatch) tr_break (); return hdr; } /* We enable tracing if either the environment variable MALLOC_TRACE is set, or if the variable mallwatch has been patched to an address that the debugging user wants us to stop on. When patching mallwatch, don't forget to set a breakpoint on tr_break! */ void mtrace () { char *mallfile; mallfile = getenv (mallenv); if (mallfile != NULL || mallwatch != NULL) { mallstream = fopen (mallfile != NULL ? mallfile : "/dev/null", "w"); if (mallstream != NULL) { /* Be sure it doesn't malloc its buffer! */ setbuf (mallstream, mallbuf); fprintf (mallstream, "= Start\n"); #if defined(emacs) && defined(VMS) fprintf (mallstream, "= Initial buffer spans %p -- %p\n", vms_initial_buffer, vms_end_brk + 1); #endif tr_old_morecore = __morecore; __morecore = tr_morecore; tr_old_lesscore = __lesscore; __lesscore = tr_lesscore; tr_old_free_hook = __free_hook; __free_hook = tr_freehook; tr_old_malloc_hook = __malloc_hook; __malloc_hook = tr_mallochook; tr_old_realloc_hook = __realloc_hook; __realloc_hook = tr_reallochook; } } } /* Access the statistics maintained by `malloc'. Copyright 1990, 1991, 1992 Free Software Foundation Written May 1989 by Mike Haertel. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. The author may be reached (Email) at the address mike@ai.mit.edu, or (US mail) as Mike Haertel c/o Free Software Foundation. */ #ifndef _MALLOC_INTERNAL #define _MALLOC_INTERNAL #include #endif struct mstats mstats () { struct mstats result; result.bytes_total = (char *) (*__morecore) (0) - _heapbase; result.chunks_used = _chunks_used; result.bytes_used = _bytes_used; result.chunks_free = _chunks_free; result.bytes_free = _bytes_free; return result; }