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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:33:23 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-05 18:33:23 +0000 |
commit | 1d5cace9db9aef76f26b2d7ba54bbb76443b00b2 (patch) | |
tree | 314a15dd1aa103da13bdc83ba1d2105a290bc5ba /lib/malloc/mstats.h | |
parent | Initial commit. (diff) | |
download | bash-upstream.tar.xz bash-upstream.zip |
Adding upstream version 5.0.upstream/5.0upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/malloc/mstats.h')
-rw-r--r-- | lib/malloc/mstats.h | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/lib/malloc/mstats.h b/lib/malloc/mstats.h new file mode 100644 index 0000000..dac0298 --- /dev/null +++ b/lib/malloc/mstats.h @@ -0,0 +1,114 @@ +/* mstats.h - definitions for malloc statistics */ + +/* Copyright (C) 2001-2003 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne-Again SHell. + + Bash 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 3 of the License, or + (at your option) any later version. + + Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef _MSTATS_H +#define _MSTATS_H + +#include "imalloc.h" + +#ifdef MALLOC_STATS + +/* This needs to change if the definition in malloc.c changes */ +#ifndef NBUCKETS +# define NBUCKETS 30 +#endif + +/* + * NMALLOC[i] is the difference between the number of mallocs and frees + * for a given block size. TMALLOC[i] is the total number of mallocs for + * a given block size. NMORECORE[i] is the total number of calls to + * morecore(i). NLESSCORE[i] is the total number of calls to lesscore(i). + * + * NMAL and NFRE are counts of the number of calls to malloc() and free(), + * respectively. NREALLOC is the total number of calls to realloc(); + * NRCOPY is the number of times realloc() had to allocate new memory and + * copy to it. NRECURSE is a count of the number of recursive calls to + * malloc() for the same bucket size, which can be caused by calls to + * malloc() from a signal handler. + * + * NSBRK is the number of calls to sbrk() (whether by morecore() or for + * alignment); TSBRK is the total number of bytes requested from the kernel + * with sbrk(). + * + * BYTESUSED is the total number of bytes consumed by blocks currently in + * use; BYTESFREE is the total number of bytes currently on all of the free + * lists. BYTESREQ is the total number of bytes requested by the caller + * via calls to malloc() and realloc(). + * + * TBSPLIT is the number of times a larger block was split to satisfy a + * smaller request. NSPLIT[i] is the number of times a block of size I was + * split. + * + * TBCOALESCE is the number of times two adjacent smaller blocks off the free + * list were combined to satisfy a larger request. + */ +struct _malstats { + int nmalloc[NBUCKETS]; + int tmalloc[NBUCKETS]; + int nmorecore[NBUCKETS]; + int nlesscore[NBUCKETS]; + int nmal; + int nfre; + int nrealloc; + int nrcopy; + int nrecurse; + int nsbrk; + bits32_t tsbrk; + bits32_t bytesused; + bits32_t bytesfree; + u_bits32_t bytesreq; + int tbsplit; + int nsplit[NBUCKETS]; + int tbcoalesce; + int ncoalesce[NBUCKETS]; + int nmmap; + bits32_t tmmap; +}; + +/* Return statistics describing allocation of blocks of size BLOCKSIZE. + NFREE is the number of free blocks for this allocation size. NUSED + is the number of blocks in use. NMAL is the number of requests for + blocks of size BLOCKSIZE. NMORECORE is the number of times we had + to call MORECORE to repopulate the free list for this bucket. + NLESSCORE is the number of times we gave memory back to the system + from this bucket. NSPLIT is the number of times a block of this size + was split to satisfy a smaller request. NCOALESCE is the number of + times two blocks of this size were combined to satisfy a larger + request. */ +struct bucket_stats { + u_bits32_t blocksize; + int nfree; + int nused; + int nmal; + int nmorecore; + int nlesscore; + int nsplit; + int ncoalesce; + int nmmap; /* currently unused */ +}; + +extern struct bucket_stats malloc_bucket_stats __P((int)); +extern struct _malstats malloc_stats __P((void)); +extern void print_malloc_stats __P((char *)); +extern void trace_malloc_stats __P((char *, char *)); + +#endif /* MALLOC_STATS */ + +#endif /* _MSTATS_H */ |