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Diffstat (limited to 'lib/malloc/imalloc.h')
| -rw-r--r-- | lib/malloc/imalloc.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/lib/malloc/imalloc.h b/lib/malloc/imalloc.h new file mode 100644 index 0000000..bebd136 --- /dev/null +++ b/lib/malloc/imalloc.h @@ -0,0 +1,178 @@ +/* imalloc.h -- internal malloc definitions shared by source files. */ + +/* Copyright (C) 2001-2020 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/>. +*/ + +/* Must be included *after* config.h */ + +#ifndef _IMALLOC_H +#define _IMALLOC_H + +#ifdef MALLOC_DEBUG +#define MALLOC_STATS +#define MALLOC_TRACE +#define MALLOC_REGISTER +#define MALLOC_WATCH +#endif + +#define MALLOC_WRAPFUNCS + +/* If defined, as it is by default, use the lesscore() function to attempt + to reduce the top of the heap when freeing memory blocks larger than a + defined threshold. */ +#define USE_LESSCORE + +/* Generic pointer type. */ +#ifndef PTR_T +# if defined (__STDC__) +# define PTR_T void * +# else +# define PTR_T char * +# endif +#endif + +#if !defined (NULL) +# define NULL 0 +#endif + +#if !defined (CPP_STRING) +# if defined (HAVE_STRINGIZE) +# define CPP_STRING(x) #x +# else +# define CPP_STRING(x) "x" +# endif /* !HAVE_STRINGIZE */ +#endif /* !__STRING */ + +#if __GNUC__ > 1 +# define FASTCOPY(s, d, n) __builtin_memcpy (d, s, n) +#else /* !__GNUC__ */ +# if !defined (HAVE_BCOPY) +# if !defined (HAVE_MEMMOVE) +# define FASTCOPY(s, d, n) memcpy (d, s, n) +# else +# define FASTCOPY(s, d, n) memmove (d, s, n) +# endif /* !HAVE_MEMMOVE */ +# else /* HAVE_BCOPY */ +# define FASTCOPY(s, d, n) bcopy (s, d, n) +# endif /* HAVE_BCOPY */ +#endif /* !__GNUC__ */ + +#if !defined (PARAMS) +# if defined (__STDC__) || defined (__GNUC__) || defined (__cplusplus) || defined (PROTOTYPES) +# define PARAMS(protos) protos +# else +# define PARAMS(protos) () +# endif +#endif + +/* Use Duff's device for good zeroing/copying performance. DO NOT call the + Duff's device macros with NBYTES == 0. */ + +#define MALLOC_BZERO(charp, nbytes) \ +do { \ + if ((nbytes) <= 32) { \ + size_t * mzp = (size_t *)(charp); \ + unsigned long mctmp = (nbytes)/sizeof(size_t); \ + long mcn; \ + if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \ + switch (mctmp) { \ + case 0: for(;;) { *mzp++ = 0; \ + case 7: *mzp++ = 0; \ + case 6: *mzp++ = 0; \ + case 5: *mzp++ = 0; \ + case 4: *mzp++ = 0; \ + case 3: *mzp++ = 0; \ + case 2: *mzp++ = 0; \ + case 1: *mzp++ = 0; if(mcn <= 0) break; mcn--; } \ + } \ + else \ + memset ((charp), 0, (nbytes)); \ +} while(0) + +#define MALLOC_ZERO(charp, nbytes) \ +do { \ + size_t mzsz = (nbytes); \ + if (mzsz <= 9 * sizeof(mzsz) { \ + size_t *mz = (size_t *)(charp); \ + if(mzsz >= 5*sizeof(mzsz)) { *mz++ = 0; \ + *mz++ = 0; \ + if(mzsz >= 7*sizeof(mzsz)) { *mz++ = 0; \ + *mz++ = 0; \ + if(mzsz >= 9*sizeof(mzsz)) { *mz++ = 0; \ + *mz++ = 0; }}} \ + *mz++ = 0; \ + *mz++ = 0; \ + *mz = 0; \ + } else \ + memset ((charp), 0, mzsz); \ +} while (0) + +#define MALLOC_MEMSET(charp, xch, nbytes) \ +do { \ + if ((nbytes) <= 32) { \ + register char * mzp = (charp); \ + unsigned long mctmp = (nbytes); \ + register long mcn; \ + if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \ + switch (mctmp) { \ + case 0: for(;;) { *mzp++ = xch; \ + case 7: *mzp++ = xch; \ + case 6: *mzp++ = xch; \ + case 5: *mzp++ = xch; \ + case 4: *mzp++ = xch; \ + case 3: *mzp++ = xch; \ + case 2: *mzp++ = xch; \ + case 1: *mzp++ = xch; if(mcn <= 0) break; mcn--; } \ + } \ + } else \ + memset ((charp), (xch), (nbytes)); \ +} while(0) + +#define MALLOC_MEMCPY(dest,src,nbytes) \ +do { \ + if ((nbytes) <= 32) { \ + size_t* mcsrc = (size_t*) src; \ + size_t* mcdst = (size_t*) dest; \ + unsigned long mctmp = (nbytes)/sizeof(size_t); \ + long mcn; \ + if (mctmp < 8) mcn = 0; else { mcn = (mctmp-1)/8; mctmp &= 7; } \ + switch (mctmp) { \ + case 0: for(;;) { *mcdst++ = *mcsrc++; \ + case 7: *mcdst++ = *mcsrc++; \ + case 6: *mcdst++ = *mcsrc++; \ + case 5: *mcdst++ = *mcsrc++; \ + case 4: *mcdst++ = *mcsrc++; \ + case 3: *mcdst++ = *mcsrc++; \ + case 2: *mcdst++ = *mcsrc++; \ + case 1: *mcdst++ = *mcsrc++; if(mcn <= 0) break; mcn--; } \ + } else \ + memcpy ((dest), (src), (nbytes)) \ +} while(0) + +#if defined (SHELL) +# include "bashintl.h" +#else +# define _(x) x +#endif + +#include <signal.h> + +extern void _malloc_block_signals PARAMS((sigset_t *, sigset_t *)); +extern void _malloc_unblock_signals PARAMS((sigset_t *, sigset_t *)); + +#endif /* _IMALLOC_H */ |