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.
13 #include <sys/types.h>
17 #include <sys/resource.h>
26 /* Almost all of this file can be skipped if we're not supporting LDB. */
27 #if defined(LISP_FEATURE_SB_LDB)
37 #include "interrupt.h"
39 #include "genesis/static-symbols.h"
40 #include "genesis/primitive-objects.h"
44 /* When we need to do command input, we use this stream, which is not
45 * in general stdin, so that things will "work" (as well as being
46 * thrown into ldb can be considered "working":-) even in a process
47 * where standard input has been redirected to a file or pipe.
49 * (We could set up output to go to a special ldb_out stream for the
50 * same reason, but there's been no pressure for that so far.)
52 * The enter-the-ldb-monitor function is responsible for setting up
54 static FILE *ldb_in = 0;
55 static int ldb_in_fd = -1;
57 typedef void cmd(char **ptr);
59 static cmd dump_cmd, print_cmd, quit_cmd, help_cmd;
60 static cmd flush_cmd, search_cmd, regs_cmd, exit_cmd;
61 static cmd print_context_cmd;
62 static cmd backtrace_cmd, purify_cmd, catchers_cmd;
63 static cmd grab_sigs_cmd;
68 void (*fn)(char **ptr);
69 } supported_cmds[] = {
70 {"help", "Display this help information.", help_cmd},
71 {"?", "(an alias for help)", help_cmd},
72 {"backtrace", "Backtrace up to N frames.", backtrace_cmd},
73 {"catchers", "Print a list of all the active catchers.", catchers_cmd},
74 {"context", "Print interrupt context number I.", print_context_cmd},
75 {"dump", "Dump memory starting at ADDRESS for COUNT words.", dump_cmd},
76 {"d", "(an alias for dump)", dump_cmd},
77 {"exit", "Exit this instance of the monitor.", exit_cmd},
78 {"flush", "Flush all temp variables.", flush_cmd},
79 /* (Classic CMU CL had a "gc" command here, which seems like a
80 * reasonable idea, but the code was stale (incompatible with
81 * gencgc) so I just flushed it. -- WHN 20000814 */
82 {"grab-signals", "Set the signal handlers to call LDB.", grab_sigs_cmd},
83 {"kill", "Kill ourself with signal number N (useful if running under gdb)",
85 {"purify", "Purify. (Caveat purifier!)", purify_cmd},
86 {"print", "Print object at ADDRESS.", print_cmd},
87 {"p", "(an alias for print)", print_cmd},
88 {"quit", "Quit.", quit_cmd},
89 {"regs", "Display current Lisp registers.", regs_cmd},
90 {"search", "Search for TYPE starting at ADDRESS for a max of COUNT words.", search_cmd},
91 {"s", "(an alias for search)", search_cmd},
95 static jmp_buf curbuf;
98 visible(unsigned char c)
100 if (c < ' ' || c > '~')
109 static char *lastaddr = 0;
110 static int lastcount = 20;
112 char *addr = lastaddr;
113 int count = lastcount, displacement;
116 addr = parse_addr(ptr);
119 count = parse_number(ptr);
123 printf("COUNT must be non-zero.\n");
136 while (count-- > 0) {
137 #ifndef LISP_FEATURE_ALPHA
138 printf("0x%08lX: ", (unsigned long) addr);
140 printf("0x%08X: ", (u32) addr);
142 if (is_valid_lisp_addr((os_vm_address_t)addr)) {
143 #ifndef LISP_FEATURE_ALPHA
144 unsigned long *lptr = (unsigned long *)addr;
146 u32 *lptr = (u32 *)addr;
148 unsigned short *sptr = (unsigned short *)addr;
149 unsigned char *cptr = (unsigned char *)addr;
151 printf("0x%08lx 0x%04x 0x%04x 0x%02x 0x%02x 0x%02x 0x%02x %c%c%c%c\n", lptr[0], sptr[0], sptr[1], cptr[0], cptr[1], cptr[2], cptr[3], visible(cptr[0]), visible(cptr[1]), visible(cptr[2]), visible(cptr[3]));
154 printf("invalid Lisp-level address\n");
156 addr += displacement;
163 print_cmd(char **ptr)
165 lispobj obj = parse_lispobj(ptr);
173 kill(getpid(), parse_number(ptr));
179 printf("CSP\t=\t0x%08lX\n", (unsigned long)current_control_stack_pointer);
180 printf("FP\t=\t0x%08lX\n", (unsigned long)current_control_frame_pointer);
181 #if !(defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
182 printf("BSP\t=\t0x%08X\n", (unsigned long)current_binding_stack_pointer);
185 #if (defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
186 printf("BSP\t=\t0x%08lx\n",
187 (unsigned long)SymbolValue(BINDING_STACK_POINTER));
190 printf("DYNAMIC\t=\t0x%08lx\n", (unsigned long)DYNAMIC_SPACE_START);
191 #if (defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
192 printf("ALLOC\t=\t0x%08lx\n",
193 (unsigned long)SymbolValue(ALLOCATION_POINTER));
195 printf("ALLOC\t=\t0x%08X\n",
196 (unsigned long)dynamic_space_free_pointer);
197 printf("TRIGGER\t=\t0x%08lx\n", (unsigned long)current_auto_gc_trigger);
199 printf("STATIC\t=\t0x%08lx\n",
200 (unsigned long)SymbolValue(STATIC_SPACE_FREE_POINTER));
201 printf("RDONLY\t=\t0x%08lx\n",
202 (unsigned long)SymbolValue(READ_ONLY_SPACE_FREE_POINTER));
207 search_cmd(char **ptr)
209 static int lastval = 0, lastcount = 0;
210 static lispobj *start = 0, *end = 0;
215 val = parse_number(ptr);
216 if (val < 0 || val > 0xff) {
217 printf("can only search for single bytes\n");
221 addr = (lispobj *)native_pointer((long)parse_addr(ptr));
223 count = parse_number(ptr);
226 /* Specified value and address, but no count. Only one. */
231 /* Specified a value, but no address, so search same range. */
237 /* Specified nothing, search again for val. */
247 printf("searching for 0x%x at 0x%08lX\n", val, (unsigned long)end);
249 while (search_for_type(val, &end, &count)) {
250 printf("found 0x%x at 0x%08lX:\n", val, (unsigned long)end);
254 if (widetag_of(obj) == SIMPLE_FUN_HEADER_WIDETAG) {
255 print((long)addr | FUN_POINTER_LOWTAG);
256 } else if (lowtag_of(obj) == OTHER_IMMEDIATE_0_LOWTAG ||
257 lowtag_of(obj) == OTHER_IMMEDIATE_1_LOWTAG) {
258 print((lispobj)addr | OTHER_POINTER_LOWTAG);
260 print((lispobj)addr);
267 /* (There used to be call_cmd() here, to call known-at-cold-init-time
268 * Lisp functions from ldb, but it bitrotted and was deleted in
269 * sbcl-0.7.5.1. See older CVS versions if you want to resuscitate
273 flush_cmd(char **ptr)
283 printf("Really quit? [y] ");
285 fgets(buf, sizeof(buf), ldb_in);
286 if (buf[0] == 'y' || buf[0] == 'Y' || buf[0] == '\n')
295 for (cmd = supported_cmds; cmd->cmd != NULL; cmd++)
296 if (cmd->help != NULL)
297 printf("%s\t%s\n", cmd->cmd, cmd->help);
309 purify_cmd(char **ptr)
315 print_context(os_context_t *context)
319 for (i = 0; i < NREGS; i++) {
320 printf("%s:\t", lisp_register_names[i]);
321 #ifdef LISP_FEATURE_X86
322 brief_print((lispobj)(*os_context_register_addr(context,
325 brief_print((lispobj)(*os_context_register_addr(context,i)));
328 #ifdef LISP_FEATURE_DARWIN
329 printf("DAR:\t\t 0x%08lx\n", (unsigned long)(*os_context_register_addr(context, 41)));
330 printf("DSISR:\t\t 0x%08lx\n", (unsigned long)(*os_context_register_addr(context, 42)));
332 printf("PC:\t\t 0x%08lx\n",
333 (unsigned long)(*os_context_pc_addr(context)));
337 print_context_cmd(char **ptr)
340 struct thread *thread=arch_os_get_current_thread();
342 free = SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,thread)>>2;
347 index = parse_number(ptr);
349 if ((index >= 0) && (index < free)) {
350 printf("There are %d interrupt contexts.\n", free);
351 printf("printing context %d\n", index);
352 print_context(thread->interrupt_contexts[index]);
354 printf("There aren't that many/few contexts.\n");
355 printf("There are %d interrupt contexts.\n", free);
359 printf("There are no interrupt contexts!\n");
361 printf("There are %d interrupt contexts.\n", free);
362 printf("printing context %d\n", free - 1);
363 print_context(thread->interrupt_contexts[free - 1]);
369 backtrace_cmd(char **ptr)
371 void backtrace(int frames);
375 n = parse_number(ptr);
379 printf("Backtrace:\n");
384 catchers_cmd(char **ptr)
386 struct catch_block *catch;
387 struct thread *thread=arch_os_get_current_thread();
389 catch = (struct catch_block *)SymbolValue(CURRENT_CATCH_BLOCK,thread);
392 printf("There are no active catchers!\n");
394 while (catch != NULL) {
395 #if !(defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
396 printf("0x%08lX:\n\tuwp: 0x%08lX\n\tfp: 0x%08lX\n\tcode: 0x%08lx\n\tentry: 0x%08lx\n\ttag: ",
397 (unsigned long)catch, (unsigned long)(catch->current_uwp),
398 (unsigned long)(catch->current_cont),
402 printf("0x%08lX:\n\tuwp: 0x%08lX\n\tfp: 0x%08lX\n\tcode: 0x%08lx\n\tentry: 0x%08lx\n\ttag: ",
403 (unsigned long)catch, (unsigned long)(catch->current_uwp),
404 (unsigned long)(catch->current_cont),
405 (unsigned long)component_ptr_from_pc((void*)catch->entry_pc) +
406 OTHER_POINTER_LOWTAG,
407 (unsigned long)catch->entry_pc);
409 brief_print((lispobj)catch->tag);
410 catch = catch->previous_catch;
416 grab_sigs_cmd(char **ptr)
418 extern void sigint_init(void);
420 printf("Grabbing signals.\n");
427 struct cmd *cmd, *found;
429 char *line, *ptr, *token;
433 ldb_in = fopen("/dev/tty","r+");
434 ldb_in_fd = fileno(ldb_in);
440 line = fgets(buf, sizeof(buf), ldb_in);
442 if (isatty(ldb_in_fd)) {
447 fprintf(stderr, "\nEOF on something other than a tty.\n");
452 if ((token = parse_token(&ptr)) == NULL)
456 for (cmd = supported_cmds; cmd->cmd != NULL; cmd++) {
457 if (strcmp(token, cmd->cmd) == 0) {
462 else if (strncmp(token, cmd->cmd, strlen(token)) == 0) {
470 printf("``%s'' is ambiguous.\n", token);
471 else if (found == NULL)
472 printf("unknown command: ``%s''\n", token);
485 bcopy(curbuf, oldbuf, sizeof(oldbuf));
487 printf("LDB monitor\n");
495 bcopy(oldbuf, curbuf, sizeof(curbuf));
504 #endif /* defined(LISP_FEATURE_SB_LDB) */
506 /* what we do when things go badly wrong at a low level */
508 monitor_or_something()
510 #if defined(LISP_FEATURE_SB_LDB)
514 "The system is too badly corrupted or confused to continue at the Lisp\n\
515 level. If the system had been compiled with the SB-LDB feature, we'd drop\n\
516 into the LDB low-level debugger now. But there's no LDB in this build, so\n\
517 we can't really do anything but just exit, sorry.\n");