1 | /******************************************************************* |
---|
2 | * File: omAllocSystem.c |
---|
3 | * Purpose: implementation of main lowl-level alloc functions |
---|
4 | * Author: obachman@mathematik.uni-kl.de (Olaf Bachmann) |
---|
5 | * Created: 11/99 |
---|
6 | *******************************************************************/ |
---|
7 | #ifndef OM_ALLOC_SYSTEM_C |
---|
8 | #define OM_ALLOC_SYSTEM_C |
---|
9 | |
---|
10 | #include <unistd.h> |
---|
11 | #include <mylimits.h> |
---|
12 | |
---|
13 | |
---|
14 | #include <omalloc/omConfig.h> |
---|
15 | #include <omalloc/omDefaultConfig.h> |
---|
16 | #include <omalloc/omMalloc.h> |
---|
17 | #include <omalloc/omalloc.h> |
---|
18 | /* include after omMalloc.h */ |
---|
19 | #include <string.h> |
---|
20 | |
---|
21 | #define OM_MALLOC_FROM_SYSTEM OM_MALLOC_MALLOC |
---|
22 | #define OM_REALLOC_FROM_SYSTEM OM_MALLOC_REALLOC |
---|
23 | #define OM_FREE_TO_SYSTEM OM_MALLOC_FREE |
---|
24 | |
---|
25 | /******************************************************************* |
---|
26 | * |
---|
27 | * AllocLarge/FreeLarge if malloc can not return sizeof(addr) |
---|
28 | * |
---|
29 | *******************************************************************/ |
---|
30 | /* allocation of large addr */ |
---|
31 | #if defined(OM_MALLOC_PROVIDES_SIZEOF_ADDR) |
---|
32 | #define _omSizeOfLargeAddr(addr) (OM_MALLOC_SIZEOF_ADDR(addr) & (~SIZEOF_OM_ALIGNMENT_1)) |
---|
33 | #else |
---|
34 | void* omAllocLarge(size_t size) |
---|
35 | { |
---|
36 | char* addr; |
---|
37 | size = OM_ALIGN_SIZE(size); |
---|
38 | addr = omAllocFromSystem(size + SIZEOF_STRICT_ALIGNMENT); |
---|
39 | *((size_t*) addr) = size; |
---|
40 | return (void *)(addr + SIZEOF_STRICT_ALIGNMENT); |
---|
41 | } |
---|
42 | |
---|
43 | void* omReallocLarge(void* old_addr, size_t new_size) |
---|
44 | { |
---|
45 | char* _old_addr; |
---|
46 | char* new_addr; |
---|
47 | |
---|
48 | omAssume(omIsLargeAddr(old_addr)); |
---|
49 | |
---|
50 | new_size = OM_ALIGN_SIZE(new_size); |
---|
51 | _old_addr = (char *)old_addr - SIZEOF_STRICT_ALIGNMENT; |
---|
52 | new_addr = omReallocSizeFromSystem(_old_addr, |
---|
53 | *((size_t*) _old_addr) + SIZEOF_STRICT_ALIGNMENT, |
---|
54 | new_size + SIZEOF_STRICT_ALIGNMENT); |
---|
55 | *((size_t*) new_addr) = new_size; |
---|
56 | return (void *)(new_addr + SIZEOF_STRICT_ALIGNMENT); |
---|
57 | } |
---|
58 | |
---|
59 | void omFreeLarge(void* addr) |
---|
60 | { |
---|
61 | char* _addr = (char *)addr - SIZEOF_STRICT_ALIGNMENT; |
---|
62 | omFreeSizeToSystem(_addr, *((size_t*) _addr) + SIZEOF_STRICT_ALIGNMENT); |
---|
63 | } |
---|
64 | |
---|
65 | #define _omSizeOfLargeAddr(addr) (*((size_t*) ((char*) addr - SIZEOF_STRICT_ALIGNMENT))) |
---|
66 | #endif /* OM_MALLOC_PROVIDES_SIZEOF_ADDR */ |
---|
67 | |
---|
68 | void* omAlloc0Large(size_t size) |
---|
69 | { |
---|
70 | void* addr = omAllocLarge(size); |
---|
71 | size = omSizeOfLargeAddr(addr); |
---|
72 | memset(addr, 0, size); |
---|
73 | return addr; |
---|
74 | } |
---|
75 | |
---|
76 | void* omRealloc0Large(void* old_addr, size_t new_size) |
---|
77 | { |
---|
78 | size_t old_size; |
---|
79 | char* new_addr; |
---|
80 | |
---|
81 | omAssume(!omIsBinPageAddr(old_addr)); |
---|
82 | |
---|
83 | old_size = omSizeOfLargeAddr(old_addr); |
---|
84 | |
---|
85 | new_addr = omReallocLarge(old_addr, new_size); |
---|
86 | new_size = omSizeOfLargeAddr(new_addr); |
---|
87 | if (new_size > old_size) |
---|
88 | memset(new_addr + old_size, 0, new_size - old_size); |
---|
89 | return (void *)new_addr; |
---|
90 | } |
---|
91 | |
---|
92 | size_t omSizeOfLargeAddr(void* addr) |
---|
93 | { |
---|
94 | return _omSizeOfLargeAddr((char *)addr); |
---|
95 | } |
---|
96 | |
---|
97 | size_t omSizeOfAddr(const void* addr) |
---|
98 | { |
---|
99 | |
---|
100 | return (omIsBinPageAddr(addr) ? |
---|
101 | #ifdef OM_HAVE_TRACK |
---|
102 | (omIsBinAddrTrackAddr(addr) ? omOutSizeOfTrackAddr((char *)addr) : omSizeOfBinAddr(addr)) : |
---|
103 | #else |
---|
104 | omSizeOfBinAddr(addr) : |
---|
105 | #endif |
---|
106 | omSizeOfLargeAddr((char *)addr)); |
---|
107 | } |
---|
108 | |
---|
109 | size_t omSizeWOfAddr(void* addr) |
---|
110 | { |
---|
111 | |
---|
112 | return (omIsBinPageAddr(addr) ? |
---|
113 | #ifdef OM_HAVE_TRACK |
---|
114 | (omIsBinAddrTrackAddr(addr) ? omOutSizeOfTrackAddr(addr) >> LOG_SIZEOF_LONG : omSizeWOfBinAddr(addr)) : |
---|
115 | #else |
---|
116 | omSizeWOfBinAddr(addr) : |
---|
117 | #endif |
---|
118 | omSizeOfLargeAddr(addr) >> LOG_SIZEOF_LONG); |
---|
119 | } |
---|
120 | |
---|
121 | /******************************************************************* |
---|
122 | * |
---|
123 | * Valloc |
---|
124 | * |
---|
125 | *******************************************************************/ |
---|
126 | #ifdef OM_HAVE_VALLOC_MMAP |
---|
127 | |
---|
128 | #include "omMmap.c" |
---|
129 | |
---|
130 | #define OM_VALLOC_FROM_SYSTEM omVallocMmap |
---|
131 | #define OM_VFREE_TO_SYSTEM omVfreeMmap |
---|
132 | |
---|
133 | #elif defined(OM_HAVE_VALLOC_MALLOC) |
---|
134 | |
---|
135 | #define OM_VALLOC_FROM_SYSTEM OM_MALLOC_VALLOC |
---|
136 | #define OM_VFREE_TO_SYSTEM OM_MALLOC_VFREE |
---|
137 | |
---|
138 | #else |
---|
139 | |
---|
140 | #define OM_VALLOC_FROM_SYSTEM omEmulateValloc |
---|
141 | #define OM_VFREE_TO_SYSTEM omEmulateVfree |
---|
142 | |
---|
143 | #define OM_ALIGN_PAGE(addr) ( ((long)addr + (SIZEOF_SYSTEM_PAGE -1)) & ~(SIZEOF_SYSTEM_PAGE - 1)) |
---|
144 | /* now we implement an emulation */ |
---|
145 | void* omEmulateValloc(size_t size) |
---|
146 | { |
---|
147 | void* addr; |
---|
148 | size_t padding = SIZEOF_VOIDP; |
---|
149 | size = OM_ALIGN_SIZE(size); |
---|
150 | while (1) |
---|
151 | { |
---|
152 | addr = OM_MALLOC_FROM_SYSTEM(size + padding); |
---|
153 | if (addr == NULL) return NULL; |
---|
154 | if ((OM_ALIGN_PAGE(addr) + SIZEOF_VOIDP) - (long) addr <= padding) |
---|
155 | { |
---|
156 | void* ret_addr = (void*) OM_ALIGN_PAGE(addr); |
---|
157 | *((void**) ((void*) ret_addr + size)) = addr; |
---|
158 | return ret_addr; |
---|
159 | } |
---|
160 | else |
---|
161 | { |
---|
162 | OM_FREE_TO_SYSTEM(addr); |
---|
163 | padding = padding << 1; |
---|
164 | } |
---|
165 | } |
---|
166 | } |
---|
167 | |
---|
168 | void omEmulateVfree(void* addr, size_t size) |
---|
169 | { |
---|
170 | size = OM_ALIGN_SIZE(size); |
---|
171 | OM_FREE_TO_SYSTEM( *((void**) ((void*) addr + size)) ); |
---|
172 | } |
---|
173 | #endif /* OM_HAVE_VALLOC_MMAP */ |
---|
174 | |
---|
175 | /******************************************************************* |
---|
176 | * |
---|
177 | * System-level Alloc/Free |
---|
178 | * |
---|
179 | *******************************************************************/ |
---|
180 | void* omAllocFromSystem(size_t size) |
---|
181 | { |
---|
182 | void* ptr; |
---|
183 | |
---|
184 | ptr = OM_MALLOC_FROM_SYSTEM(size); |
---|
185 | if (ptr == NULL) |
---|
186 | { |
---|
187 | OM_MEMORY_LOW_HOOK(); |
---|
188 | ptr = OM_MALLOC_FROM_SYSTEM(size); |
---|
189 | if (ptr == NULL) |
---|
190 | { |
---|
191 | OM_OUT_OF_MEMORY_HOOK(); |
---|
192 | exit(1); |
---|
193 | } |
---|
194 | } |
---|
195 | |
---|
196 | #ifndef OM_NDEBUG |
---|
197 | if (((unsigned long) ptr) + size > om_MaxAddr) |
---|
198 | om_MaxAddr = ((unsigned long) ptr) + size; |
---|
199 | if (((unsigned long) ptr) < om_MinAddr) |
---|
200 | om_MinAddr = ((unsigned long) ptr); |
---|
201 | #endif |
---|
202 | |
---|
203 | om_Info.CurrentBytesFromMalloc += size; |
---|
204 | if (om_Info.CurrentBytesFromMalloc > om_Info.MaxBytesFromMalloc) |
---|
205 | { |
---|
206 | om_Info.MaxBytesFromMalloc = om_Info.CurrentBytesFromMalloc; |
---|
207 | #if defined(OM_HAVE_VALLOC_MMAP) && defined(OM_MALLOC_MAX_BYTES_SYSTEM) |
---|
208 | if (om_Info.CurrentBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM > om_Info.MaxBytesSystem) |
---|
209 | om_Info.MaxBytesSystem = om_Info.CurrentBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM; |
---|
210 | #endif |
---|
211 | #if defined(HAVE_SBRK) && !defined(OM_MALLOC_MAX_BYTES_SBRK) |
---|
212 | if (! om_SbrkInit) om_SbrkInit = (unsigned long) sbrk(0) - size; |
---|
213 | if (om_Info.MaxBytesFromMalloc |
---|
214 | #ifndef OM_HAVE_VALLOC_MMAP |
---|
215 | + om_Info.CurrentBytesFromValloc |
---|
216 | #endif |
---|
217 | > om_Info.MaxBytesSbrk) |
---|
218 | { |
---|
219 | om_Info.MaxBytesSbrk = (unsigned long) sbrk(0) - om_SbrkInit; |
---|
220 | } |
---|
221 | #endif |
---|
222 | } |
---|
223 | OM_MALLOC_HOOK(size); |
---|
224 | return ptr; |
---|
225 | } |
---|
226 | |
---|
227 | void* omReallocFromSystem(void* addr, size_t newsize) |
---|
228 | { |
---|
229 | return omReallocSizeFromSystem(addr, omSizeOfAddr(addr), newsize); |
---|
230 | } |
---|
231 | |
---|
232 | void* omReallocSizeFromSystem(void* addr, size_t oldsize, size_t newsize) |
---|
233 | { |
---|
234 | void* res; |
---|
235 | |
---|
236 | res = OM_REALLOC_FROM_SYSTEM(addr, newsize); |
---|
237 | if (res == NULL) |
---|
238 | { |
---|
239 | OM_MEMORY_LOW_HOOK(); |
---|
240 | /* Can do a realloc again: manpage reads: |
---|
241 | "If realloc() fails the original block is left untouched - |
---|
242 | it is not freed or moved." */ |
---|
243 | res = OM_REALLOC_FROM_SYSTEM(addr, newsize); |
---|
244 | if (res == NULL) |
---|
245 | { |
---|
246 | OM_OUT_OF_MEMORY_HOOK(); |
---|
247 | /* should never get here */ |
---|
248 | omAssume(0); |
---|
249 | exit(1); |
---|
250 | } |
---|
251 | } |
---|
252 | |
---|
253 | #ifndef OM_NDEBUG |
---|
254 | if (((unsigned long) res) + newsize > om_MaxAddr) |
---|
255 | om_MaxAddr = ((unsigned long) res) + newsize; |
---|
256 | if (((unsigned long) res) < om_MinAddr) |
---|
257 | om_MinAddr = ((unsigned long) res); |
---|
258 | #endif |
---|
259 | |
---|
260 | om_Info.CurrentBytesFromMalloc += (long) newsize - (long) oldsize; |
---|
261 | |
---|
262 | |
---|
263 | if (om_Info.CurrentBytesFromMalloc > om_Info.MaxBytesFromMalloc) |
---|
264 | { |
---|
265 | om_Info.MaxBytesFromMalloc = om_Info.CurrentBytesFromMalloc; |
---|
266 | #if defined(OM_HAVE_VALLOC_MMAP) && defined(OM_MALLOC_MAX_BYTES_SYSTEM) |
---|
267 | if (om_Info.CurrentBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM > om_Info.MaxBytesSystem) |
---|
268 | om_Info.MaxBytesSystem = om_Info.CurrentBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM; |
---|
269 | #endif |
---|
270 | #if defined(HAVE_SBRK) && !defined(OM_MALLOC_MAX_BYTES_SBRK) |
---|
271 | if (om_Info.MaxBytesFromMalloc |
---|
272 | #ifndef OM_HAVE_VALLOC_MMAP |
---|
273 | + om_Info.CurrentBytesFromValloc |
---|
274 | #endif |
---|
275 | > om_Info.MaxBytesSbrk) |
---|
276 | { |
---|
277 | om_Info.MaxBytesSbrk = (unsigned long) sbrk(0) - om_SbrkInit; |
---|
278 | } |
---|
279 | #endif |
---|
280 | } |
---|
281 | |
---|
282 | OM_REALLOC_HOOK(oldsize, newsize); |
---|
283 | return res; |
---|
284 | } |
---|
285 | |
---|
286 | void omFreeToSystem(void* addr) |
---|
287 | { |
---|
288 | omFreeSizeToSystem(addr, omSizeOfAddr(addr)); |
---|
289 | } |
---|
290 | |
---|
291 | void omFreeSizeToSystem(void* addr, size_t size) |
---|
292 | { |
---|
293 | OM_FREE_TO_SYSTEM( addr ); |
---|
294 | om_Info.CurrentBytesFromMalloc -= size; |
---|
295 | OM_FREE_HOOK(size); |
---|
296 | } |
---|
297 | |
---|
298 | void* _omVallocFromSystem(size_t size, int fail) |
---|
299 | { |
---|
300 | void* page = OM_VALLOC_FROM_SYSTEM(size); |
---|
301 | if (page == NULL) |
---|
302 | { |
---|
303 | OM_MEMORY_LOW_HOOK(); |
---|
304 | page = OM_VALLOC_FROM_SYSTEM(size); |
---|
305 | if (page == NULL) |
---|
306 | { |
---|
307 | if (fail) return NULL; |
---|
308 | else |
---|
309 | { |
---|
310 | OM_OUT_OF_MEMORY_HOOK(); |
---|
311 | /* should never get here */ |
---|
312 | omAssume(0); |
---|
313 | exit(1); |
---|
314 | } |
---|
315 | } |
---|
316 | } |
---|
317 | |
---|
318 | #ifndef OM_NDEBUG |
---|
319 | if (((unsigned long) page) + size > om_MaxAddr) |
---|
320 | om_MaxAddr = ((unsigned long) page) + size; |
---|
321 | if (((unsigned long) page) < om_MinAddr) |
---|
322 | om_MinAddr = ((unsigned long) page); |
---|
323 | #endif |
---|
324 | |
---|
325 | omAssume(omIsAddrPageAligned(page)); |
---|
326 | om_Info.CurrentBytesFromValloc += size; |
---|
327 | if (om_Info.CurrentBytesFromValloc > om_Info.MaxBytesFromValloc) |
---|
328 | { |
---|
329 | om_Info.MaxBytesFromValloc = om_Info.CurrentBytesFromValloc; |
---|
330 | #if defined(OM_HAVE_VALLOC_MMAP) && defined(OM_MALLOC_MAX_BYTES_SYSTEM) |
---|
331 | if (om_Info.MaxBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM > om_Info.MaxBytesSystem) |
---|
332 | om_Info.MaxBytesSystem = om_Info.MaxBytesFromValloc + OM_MALLOC_MAX_BYTES_SYSTEM; |
---|
333 | #endif |
---|
334 | #if defined(HAVE_SBRK) && !defined(OM_HAVE_VALLOC_MMAP) && !defined(OM_MALLOC_MAX_BYTES_SBRK) |
---|
335 | if (! om_SbrkInit) om_SbrkInit = (unsigned long) sbrk(0) - size; |
---|
336 | if (om_Info.CurrentBytesFromMalloc + om_Info.CurrentBytesFromValloc > om_Info.MaxBytesSbrk) |
---|
337 | { |
---|
338 | om_Info.MaxBytesSbrk = (unsigned long) sbrk(0) - om_SbrkInit; |
---|
339 | omAssume(om_Info.MaxBytesSbrk >= om_Info.CurrentBytesFromMalloc |
---|
340 | + om_Info.CurrentBytesFromValloc); |
---|
341 | } |
---|
342 | #endif |
---|
343 | } |
---|
344 | OM_VALLOC_HOOK(size); |
---|
345 | return page; |
---|
346 | } |
---|
347 | |
---|
348 | void omVfreeToSystem(void* page, size_t size) |
---|
349 | { |
---|
350 | omAssume(omIsAddrPageAligned(page)); |
---|
351 | OM_VFREE_TO_SYSTEM(page, size); |
---|
352 | om_Info.CurrentBytesFromValloc -= size; |
---|
353 | OM_VFREE_HOOK(size); |
---|
354 | } |
---|
355 | |
---|
356 | #endif /* OM_ALLOC_SYSTEM_C */ |
---|