2 * This software is part of the SBCL system. See the README file for
5 * This software is derived from the CMU CL system, which was
6 * written at Carnegie Mellon University and released into the
7 * public domain. The software is in the public domain and is
8 * provided with absolutely no warranty. See the COPYING and CREDITS
9 * files for more information.
27 #include "gc-internal.h"
30 #include "genesis/static-symbols.h"
31 #include "genesis/symbol.h"
34 write_lispobj(lispobj obj, FILE *file)
36 fwrite(&obj, sizeof(lispobj), 1, file);
40 write_bytes(FILE *file, char *addr, long bytes)
42 long count, here, data;
44 bytes = (bytes+os_vm_page_size-1)&~(os_vm_page_size-1);
49 data = (ftell(file)+os_vm_page_size-1)&~(os_vm_page_size-1);
53 count = fwrite(addr, 1, bytes, file);
59 perror("error writing to save file");
65 return data/os_vm_page_size - 1;
69 output_space(FILE *file, int id, lispobj *addr, lispobj *end)
71 int words, bytes, data;
72 static char *names[] = {NULL, "dynamic", "static", "read-only"};
74 write_lispobj(id, file);
76 write_lispobj(words, file);
78 bytes = words * sizeof(lispobj);
80 printf("writing %d bytes from the %s space at 0x%08lx\n",
81 bytes, names[id], (unsigned long)addr);
83 data = write_bytes(file, (char *)addr, bytes);
85 write_lispobj(data, file);
86 write_lispobj((long)addr / os_vm_page_size, file);
87 write_lispobj((bytes + os_vm_page_size - 1) / os_vm_page_size, file);
91 open_core_for_saving(char *filename)
93 /* Open the output file. We don't actually need the file yet, but
94 * the fopen() might fail for some reason, and we want to detect
95 * that and back out before we do anything irreversible. */
97 return fopen(filename, "w");
101 save_to_filehandle(FILE *file, char *filename, lispobj init_function)
105 /* Smash the enclosing state. (Once we do this, there's no good
106 * way to go back, which is a sufficient reason that this ends up
107 * being SAVE-LISP-AND-DIE instead of SAVE-LISP-AND-GO-ON). */
108 printf("[undoing binding stack and other enclosing state... ");
110 for_each_thread(th) { /* XXX really? */
111 unbind_to_here((lispobj *)th->binding_stack_start,th);
112 SetSymbolValue(CURRENT_CATCH_BLOCK, 0,th);
113 SetSymbolValue(CURRENT_UNWIND_PROTECT_BLOCK, 0,th);
118 /* (Now we can actually start copying ourselves into the output file.) */
120 printf("[saving current Lisp image into %s:\n", filename);
123 write_lispobj(CORE_MAGIC, file);
125 write_lispobj(VERSION_CORE_ENTRY_TYPE_CODE, file);
126 write_lispobj(3, file);
127 write_lispobj(SBCL_CORE_VERSION_INTEGER, file);
129 write_lispobj(BUILD_ID_CORE_ENTRY_TYPE_CODE, file);
130 write_lispobj(/* (We're writing the word count of the entry here, and the 2
131 * term is one word for the leading BUILD_ID_CORE_ENTRY_TYPE_CODE
132 * word and one word where we store the count itself.) */
133 2 + strlen((const char *)build_id),
137 for (p = build_id; *p; ++p)
138 write_lispobj(*p, file);
141 write_lispobj(NEW_DIRECTORY_CORE_ENTRY_TYPE_CODE, file);
142 write_lispobj(/* (word count = 3 spaces described by 5 words each, plus the
143 * entry type code, plus this count itself) */
146 READ_ONLY_CORE_SPACE_ID,
147 (lispobj *)READ_ONLY_SPACE_START,
148 (lispobj *)SymbolValue(READ_ONLY_SPACE_FREE_POINTER,0));
150 STATIC_CORE_SPACE_ID,
151 (lispobj *)STATIC_SPACE_START,
152 (lispobj *)SymbolValue(STATIC_SPACE_FREE_POINTER,0));
155 DYNAMIC_CORE_SPACE_ID,
156 (lispobj *)current_dynamic_space,
157 dynamic_space_free_pointer);
159 #ifdef LISP_FEATURE_GENCGC
160 /* Flush the current_region, updating the tables. */
161 gc_alloc_update_all_page_tables();
162 update_dynamic_space_free_pointer();
165 DYNAMIC_CORE_SPACE_ID,
166 (lispobj *)DYNAMIC_SPACE_START,
167 (lispobj *)SymbolValue(ALLOCATION_POINTER,0));
170 write_lispobj(INITIAL_FUN_CORE_ENTRY_TYPE_CODE, file);
171 write_lispobj(3, file);
172 write_lispobj(init_function, file);
174 #ifdef LISP_FEATURE_GENCGC
176 size_t size = (last_free_page*sizeof(long)+os_vm_page_size-1)
177 &~(os_vm_page_size-1);
178 long *data = calloc(size, 1);
182 for (i = 0; i < last_free_page; i++) {
183 data[i] = page_table[i].first_object_offset;
185 write_lispobj(PAGE_TABLE_CORE_ENTRY_TYPE_CODE, file);
186 write_lispobj(4, file);
187 write_lispobj(size, file);
188 offset = write_bytes(file, (char *) data, size);
189 write_lispobj(offset, file);
194 write_lispobj(END_CORE_ENTRY_TYPE_CODE, file);
203 save(char *filename, lispobj init_function)
205 FILE *file = open_core_for_saving(filename);
212 return save_to_filehandle(file, filename, init_function);