pike.git/src/pike_memory.h:2a782df8511f7bfe3faf4d002250c33fac0d45b2

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 /* || This file is part of Pike. For copyright information see COPYRIGHT. || Pike is distributed under GPL, LGPL and MPL. See the file COPYING || for more information. || $Id: pike_memory.h,v 1.57 2008/06/02 14:15:20 mast Exp $ */ #ifndef MEMORY_H #define MEMORY_H #include "global.h" #include "stralloc.h" #ifdef USE_VALGRIND #define HAVE_VALGRIND_MACROS /* Assume that any of the following header files have the macros we * need. Haven't checked if it's true or not. */ #ifdef HAVE_MEMCHECK_H #include <memcheck.h> #elif defined(HAVE_VALGRIND_MEMCHECK_H) #include <valgrind/memcheck.h> #elif defined(HAVE_VALGRIND_H) #include <valgrind.h> #else #undef HAVE_VALGRIND_MACROS #endif #endif /* USE_VALGRIND */ #ifdef HAVE_VALGRIND_MACROS #ifndef VALGRIND_MAKE_MEM_NOACCESS #define VALGRIND_MAKE_MEM_NOACCESS VALGRIND_MAKE_NOACCESS #define VALGRIND_MAKE_MEM_UNDEFINED VALGRIND_MAKE_WRITABLE #define VALGRIND_MAKE_MEM_DEFINED VALGRIND_MAKE_READABLE #endif /* No Access */ #define PIKE_MEM_NA(lvalue) do { \ PIKE_MEM_NA_RANGE(&(lvalue), sizeof (lvalue)); \ } while (0) #define PIKE_MEM_NA_RANGE(addr, bytes) do { \ VALGRIND_DISCARD(VALGRIND_MAKE_MEM_NOACCESS(addr, bytes)); \ } while (0) /* Write Only -- Will become RW when having been written to */ #define PIKE_MEM_WO(lvalue) do { \ PIKE_MEM_WO_RANGE(&(lvalue), sizeof (lvalue)); \ } while (0) #define PIKE_MEM_WO_RANGE(addr, bytes) do { \ VALGRIND_DISCARD(VALGRIND_MAKE_MEM_UNDEFINED(addr, bytes)); \ } while (0) /* Read/Write */ #define PIKE_MEM_RW(lvalue) do { \ PIKE_MEM_RW_RANGE(&(lvalue), sizeof (lvalue)); \ } while (0) #define PIKE_MEM_RW_RANGE(addr, bytes) do { \ VALGRIND_DISCARD(VALGRIND_MAKE_MEM_DEFINED(addr, bytes)); \ } while (0) /* Read Only -- Not currently supported by valgrind */ #define PIKE_MEM_RO(lvalue) do { \ PIKE_MEM_RO_RANGE(&(lvalue), sizeof (lvalue)); \ } while (0) #define PIKE_MEM_RO_RANGE(addr, bytes) do { \ VALGRIND_DISCARD(VALGRIND_MAKE_MEM_DEFINED(addr, bytes)); \ } while (0) /* Return true if a memchecker is in use. */ #define PIKE_MEM_CHECKER() RUNNING_ON_VALGRIND /* Return true if a memchecker reports the memory to not be * addressable (might also print debug messages etc). */ #define PIKE_MEM_NOT_ADDR(lvalue) \ PIKE_MEM_NOT_ADDR_RANGE(&(lvalue), sizeof (lvalue)) #define PIKE_MEM_NOT_ADDR_RANGE(addr, bytes) \ VALGRIND_CHECK_MEM_IS_ADDRESSABLE(addr, bytes) /* Return true if a memchecker reports the memory to not be defined * (might also print debug messages etc). */ #define PIKE_MEM_NOT_DEF(lvalue) \ PIKE_MEM_NOT_DEF_RANGE(&(lvalue), sizeof (lvalue)) #define PIKE_MEM_NOT_DEF_RANGE(addr, bytes) \ VALGRIND_CHECK_MEM_IS_DEFINED(addr, bytes) #else /* !HAVE_VALGRIND_MACROS */ #define PIKE_MEM_NA(lvalue) do {} while (0) #define PIKE_MEM_NA_RANGE(addr, bytes) do {} while (0) #define PIKE_MEM_WO(lvalue) do {} while (0) #define PIKE_MEM_WO_RANGE(addr, bytes) do {} while (0) #define PIKE_MEM_RW(lvalue) do {} while (0) #define PIKE_MEM_RW_RANGE(addr, bytes) do {} while (0) #define PIKE_MEM_RO(lvalue) do {} while (0) #define PIKE_MEM_RO_RANGE(addr, bytes) do {} while (0) #define PIKE_MEM_CHECKER() 0 #define PIKE_MEM_NOT_ADDR(lvalue) 0 #define PIKE_MEM_NOT_ADDR_RANGE(addr, bytes) 0 #define PIKE_MEM_NOT_DEF(lvalue) 0 #define PIKE_MEM_NOT_DEF_RANGE(addr, bytes) 0 #endif /* !HAVE_VALGRIND_MACROS */ #define MEMSEARCH_LINKS 512 struct link { struct link *next; INT32 key; ptrdiff_t offset; }; enum methods { no_search, use_memchr, memchr_and_memcmp, hubbe_search, boyer_moore }; struct mem_searcher { enum methods method; char *needle; size_t needlelen; size_t hsize, max; struct link links[MEMSEARCH_LINKS]; struct link *set[MEMSEARCH_LINKS]; }; #include "pike_search.h" #include "block_alloc_h.h" #define MEMCHR0 MEMCHR extern int page_size; /* Note to self: Prototypes must be updated manually /Hubbe */ PMOD_EXPORT ptrdiff_t pcharp_memcmp(PCHARP a, PCHARP b, int sz); PMOD_EXPORT long pcharp_strlen(PCHARP a); PMOD_EXPORT p_wchar1 *MEMCHR1(p_wchar1 *p, p_wchar2 c, ptrdiff_t e); PMOD_EXPORT p_wchar2 *MEMCHR2(p_wchar2 *p, p_wchar2 c, ptrdiff_t e); PMOD_EXPORT void swap(char *a, char *b, size_t size); PMOD_EXPORT void reverse(char *memory, size_t nitems, size_t size); PMOD_EXPORT void reorder(char *memory, INT32 nitems, INT32 size,INT32 *order); PMOD_EXPORT size_t hashmem(const unsigned char *a, size_t len, size_t mlen); PMOD_EXPORT size_t hashstr(const unsigned char *str, ptrdiff_t maxn); PMOD_EXPORT size_t simple_hashmem(const unsigned char *str, ptrdiff_t len, ptrdiff_t maxn); PMOD_EXPORT size_t simple_hashmem1(const p_wchar1 *str, ptrdiff_t len, ptrdiff_t maxn); PMOD_EXPORT size_t simple_hashmem2(const p_wchar2 *str, ptrdiff_t len, ptrdiff_t maxn); PMOD_EXPORT void memfill(char *to, INT32 tolen, char *from, INT32 fromlen, INT32 offset); PMOD_EXPORT void *debug_xalloc(size_t size); PMOD_EXPORT void *debug_xmalloc(size_t s); PMOD_EXPORT void debug_xfree(void *mem); PMOD_EXPORT void *debug_xrealloc(void *m, size_t s); PMOD_EXPORT void *debug_xcalloc(size_t n, size_t s); PMOD_EXPORT void *mexec_alloc(size_t sz); PMOD_EXPORT void *mexec_realloc(void *ptr, size_t sz); PMOD_EXPORT void mexec_free(void *ptr); void init_pike_memory (void); void exit_pike_memory (void); #undef BLOCK_ALLOC #ifdef HANDLES_UNALIGNED_MEMORY_ACCESS #define DO_IF_ELSE_UNALIGNED_MEMORY_ACCESS(IF, ELSE) IF #else /* !HANDLES_UNALIGNED_MEMORY_ACCESS */ #define DO_IF_ELSE_UNALIGNED_MEMORY_ACCESS(IF, ELSE) ELSE #endif /* HANDLES_UNALIGNED_MEMORY_ACCESS */ #if SIZEOF_CHAR_P == 4 #define DIVIDE_BY_2_CHAR_P(X) (X >>= 3) #else /* sizeof(char *) != 4 */ #if SIZEOF_CHAR_P == 8 #define DIVIDE_BY_2_CHAR_P(X) (X >>= 4) #else /* sizeof(char *) != 8 */ #define DIVIDE_BY_2_CHAR_P(X) (X /= 2*sizeof(size_t)) #endif /* sizeof(char *) == 8 */ #endif /* sizeof(char *) == 4 */ /* NB: RET should be an lvalue of type size_t. */ #define DO_HASHMEM(RET, A, LEN, MLEN) \ do { \ const unsigned char *a = A; \ size_t len = LEN; \ size_t mlen = MLEN; \ size_t ret; \ \ ret = 9248339*len; \ if(len<mlen) \ mlen=len; \ else \ { \ switch(len-mlen) \ { \ default: ret^=(ret<<6) + a[len-7]; \ case 7: \ case 6: ret^=(ret<<7) + a[len-5]; \ case 5: \ case 4: ret^=(ret<<4) + a[len-4]; \ case 3: ret^=(ret<<3) + a[len-3]; \ case 2: ret^=(ret<<3) + a[len-2]; \ case 1: ret^=(ret<<3) + a[len-1]; \ } \ } \ a += mlen & 7; \ switch(mlen&7) \ { \ case 7: ret^=a[-7]; \ case 6: ret^=(ret<<4)+a[-6]; \ case 5: ret^=(ret<<7)+a[-5]; \ case 4: ret^=(ret<<6)+a[-4]; \ case 3: ret^=(ret<<3)+a[-3]; \ case 2: ret^=(ret<<7)+a[-2]; \ case 1: ret^=(ret<<5)+a[-1]; \ } \ \ DO_IF_ELSE_UNALIGNED_MEMORY_ACCESS( \ { \ size_t *b; \ b=(size_t *)a; \ \ for(DIVIDE_BY_2_CHAR_P(mlen);mlen--;) \ { \ ret^=(ret<<7)+*(b++); \ ret^=(ret>>6)+*(b++); \ } \ } \ , \ for(mlen >>= 3; mlen--;) \ { \ register size_t t1; \ register size_t t2; \ t1= a[0]; \ t2= a[1]; \ t1=(t1<<5) + a[2]; \ t2=(t2<<4) + a[3]; \ t1=(t1<<7) + a[4]; \ t2=(t2<<5) + a[5]; \ t1=(t1<<3) + a[6]; \ t2=(t2<<4) + a[7]; \ a += 8; \ ret^=(ret<<7) + (ret>>6) + t1 + (t2<<6); \ } \ ) \ \ RET = ret; \ } while(0) /* Determine if we should use our own heap manager for executable * memory. */ #if defined(MEXEC_USES_MMAP) || defined (_WIN32) #define USE_MY_MEXEC_ALLOC #endif #endif

pike.git/ src/ pike_memory.h > 2a782df8511f7bfe3faf4d002250c33fac0d45b2 [Annotate]