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>
24 /* Almost all of this file can be skipped if we're not supporting LDB. */
25 #if defined(LISP_FEATURE_SB_LDB)
35 #include "interrupt.h"
36 #include "genesis/static-symbols.h"
37 #include "genesis/primitive-objects.h"
41 /* When we need to do command input, we use this stream, which is not
42 * in general stdin, so that things will "work" (as well as being
43 * thrown into ldb can be considered "working":-) even in a process
44 * where standard input has been redirected to a file or pipe.
46 * (We could set up output to go to a special ldb_out stream for the
47 * same reason, but there's been no pressure for that so far.)
49 * The enter-the-ldb-monitor function is responsible for setting up
51 static FILE *ldb_in = 0;
52 static int ldb_in_fd = -1;
54 typedef void cmd(char **ptr);
56 static cmd dump_cmd, print_cmd, quit_cmd, help_cmd;
57 static cmd flush_cmd, search_cmd, regs_cmd, exit_cmd;
58 static cmd print_context_cmd;
59 static cmd backtrace_cmd, purify_cmd, catchers_cmd;
60 static cmd grab_sigs_cmd;
65 void (*fn)(char **ptr);
66 } supported_cmds[] = {
67 {"help", "Display this help information.", help_cmd},
68 {"?", "(an alias for help)", help_cmd},
69 {"backtrace", "Backtrace up to N frames.", backtrace_cmd},
70 {"catchers", "Print a list of all the active catchers.", catchers_cmd},
71 {"context", "Print interrupt context number I.", print_context_cmd},
72 {"dump", "Dump memory starting at ADDRESS for COUNT words.", dump_cmd},
73 {"d", "(an alias for dump)", dump_cmd},
74 {"exit", "Exit this instance of the monitor.", exit_cmd},
75 {"flush", "Flush all temp variables.", flush_cmd},
76 /* (Classic CMU CL had a "gc" command here, which seems like a
77 * reasonable idea, but the code was stale (incompatible with
78 * gencgc) so I just flushed it. -- WHN 20000814 */
79 {"grab-signals", "Set the signal handlers to call LDB.", grab_sigs_cmd},
80 {"kill", "Kill ourself with signal number N (useful if running under gdb)",
82 {"purify", "Purify. (Caveat purifier!)", purify_cmd},
83 {"print", "Print object at ADDRESS.", print_cmd},
84 {"p", "(an alias for print)", print_cmd},
85 {"quit", "Quit.", quit_cmd},
86 {"regs", "Display current Lisp registers.", regs_cmd},
87 {"search", "Search for TYPE starting at ADDRESS for a max of COUNT words.", search_cmd},
88 {"s", "(an alias for search)", search_cmd},
92 static jmp_buf curbuf;
95 visible(unsigned char c)
97 if (c < ' ' || c > '~')
106 static char *lastaddr = 0;
107 static int lastcount = 20;
109 char *addr = lastaddr;
110 int count = lastcount, displacement;
113 addr = parse_addr(ptr);
116 count = parse_number(ptr);
120 printf("COUNT must be non-zero.\n");
133 while (count-- > 0) {
135 printf("0x%08lX: ", (unsigned long) addr);
137 printf("0x%08X: ", (u32) addr);
139 if (is_valid_lisp_addr((os_vm_address_t)addr)) {
141 unsigned long *lptr = (unsigned long *)addr;
143 u32 *lptr = (u32 *)addr;
145 unsigned short *sptr = (unsigned short *)addr;
146 unsigned char *cptr = (unsigned char *)addr;
148 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]));
151 printf("invalid Lisp-level address\n");
153 addr += displacement;
160 print_cmd(char **ptr)
162 lispobj obj = parse_lispobj(ptr);
170 kill(getpid(), parse_number(ptr));
176 printf("CSP\t=\t0x%08lX\n", (unsigned long)current_control_stack_pointer);
177 printf("FP\t=\t0x%08lX\n", (unsigned long)current_control_frame_pointer);
178 #if !defined(__i386__)
179 printf("BSP\t=\t0x%08X\n", (unsigned long)current_binding_stack_pointer);
182 printf("BSP\t=\t0x%08lx\n",
183 (unsigned long)SymbolValue(BINDING_STACK_POINTER));
186 printf("DYNAMIC\t=\t0x%08lx\n", (unsigned long)DYNAMIC_SPACE_START);
187 #if defined(__i386__)
188 printf("ALLOC\t=\t0x%08lx\n",
189 (unsigned long)SymbolValue(ALLOCATION_POINTER));
191 printf("ALLOC\t=\t0x%08X\n",
192 (unsigned long)dynamic_space_free_pointer);
193 printf("TRIGGER\t=\t0x%08lx\n", (unsigned long)current_auto_gc_trigger);
195 printf("STATIC\t=\t0x%08lx\n",
196 (unsigned long)SymbolValue(STATIC_SPACE_FREE_POINTER));
197 printf("RDONLY\t=\t0x%08lx\n",
198 (unsigned long)SymbolValue(READ_ONLY_SPACE_FREE_POINTER));
201 printf("FLAGS\t=\t0x%08x\n", current_flags_register);
206 search_cmd(char **ptr)
208 static int lastval = 0, lastcount = 0;
209 static lispobj *start = 0, *end = 0;
214 val = parse_number(ptr);
215 if (val < 0 || val > 0xff) {
216 printf("can only search for single bytes\n");
220 addr = (lispobj *)native_pointer((long)parse_addr(ptr));
222 count = parse_number(ptr);
225 /* Specified value and address, but no count. Only one. */
230 /* Specified a value, but no address, so search same range. */
236 /* Specified nothing, search again for val. */
246 printf("searching for 0x%x at 0x%08lX\n", val, (unsigned long)end);
248 while (search_for_type(val, &end, &count)) {
249 printf("found 0x%x at 0x%08lX:\n", val, (unsigned long)end);
253 if (widetag_of(obj) == SIMPLE_FUN_HEADER_WIDETAG) {
254 print((long)addr | FUN_POINTER_LOWTAG);
255 } else if (lowtag_of(obj) == OTHER_IMMEDIATE_0_LOWTAG ||
256 lowtag_of(obj) == OTHER_IMMEDIATE_1_LOWTAG) {
257 print((lispobj)addr | OTHER_POINTER_LOWTAG);
259 print((lispobj)addr);
266 /* (There used to be call_cmd() here, to call known-at-cold-init-time
267 * Lisp functions from ldb, but it bitrotted and was deleted in
268 * sbcl-0.7.5.1. See older CVS versions if you want to resuscitate
272 flush_cmd(char **ptr)
282 printf("Really quit? [y] ");
284 fgets(buf, sizeof(buf), ldb_in);
285 if (buf[0] == 'y' || buf[0] == 'Y' || buf[0] == '\n')
294 for (cmd = supported_cmds; cmd->cmd != NULL; cmd++)
295 if (cmd->help != NULL)
296 printf("%s\t%s\n", cmd->cmd, cmd->help);
308 purify_cmd(char **ptr)
314 print_context(os_context_t *context)
318 for (i = 0; i < NREGS; i++) {
319 printf("%s:\t", lisp_register_names[i]);
321 brief_print((lispobj)(*os_context_register_addr(context,
324 brief_print((lispobj)(*os_context_register_addr(context,i)));
327 printf("PC:\t\t 0x%08lx\n",
328 (unsigned long)(*os_context_pc_addr(context)));
332 print_context_cmd(char **ptr)
336 free = SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX)>>2;
341 index = parse_number(ptr);
343 if ((index >= 0) && (index < free)) {
344 printf("There are %d interrupt contexts.\n", free);
345 printf("printing context %d\n", index);
346 print_context(lisp_interrupt_contexts[index]);
348 printf("There aren't that many/few contexts.\n");
349 printf("There are %d interrupt contexts.\n", free);
353 printf("There are no interrupt contexts!\n");
355 printf("There are %d interrupt contexts.\n", free);
356 printf("printing context %d\n", free - 1);
357 print_context(lisp_interrupt_contexts[free - 1]);
363 backtrace_cmd(char **ptr)
365 void backtrace(int frames);
369 n = parse_number(ptr);
373 printf("Backtrace:\n");
378 catchers_cmd(char **ptr)
380 struct catch_block *catch;
382 catch = (struct catch_block *)SymbolValue(CURRENT_CATCH_BLOCK);
385 printf("There are no active catchers!\n");
387 while (catch != NULL) {
389 printf("0x%08lX:\n\tuwp: 0x%08lX\n\tfp: 0x%08lX\n\tcode: 0x%08lx\n\tentry: 0x%08lx\n\ttag: ",
390 (unsigned long)catch, (unsigned long)(catch->current_uwp),
391 (unsigned long)(catch->current_cont),
395 printf("0x%08lX:\n\tuwp: 0x%08lX\n\tfp: 0x%08lX\n\tcode: 0x%08lx\n\tentry: 0x%08lx\n\ttag: ",
396 (unsigned long)catch, (unsigned long)(catch->current_uwp),
397 (unsigned long)(catch->current_cont),
398 (unsigned long)component_ptr_from_pc((void*)catch->entry_pc) +
399 OTHER_POINTER_LOWTAG,
400 (unsigned long)catch->entry_pc);
402 brief_print((lispobj)catch->tag);
403 catch = catch->previous_catch;
409 grab_sigs_cmd(char **ptr)
411 extern void sigint_init(void);
413 printf("Grabbing signals.\n");
420 struct cmd *cmd, *found;
422 char *line, *ptr, *token;
426 ldb_in = fopen("/dev/tty","r+");
427 ldb_in_fd = fileno(ldb_in);
433 line = fgets(buf, sizeof(buf), ldb_in);
435 if (isatty(ldb_in_fd)) {
440 fprintf(stderr, "\nEOF on something other than a tty.\n");
445 if ((token = parse_token(&ptr)) == NULL)
449 for (cmd = supported_cmds; cmd->cmd != NULL; cmd++) {
450 if (strcmp(token, cmd->cmd) == 0) {
455 else if (strncmp(token, cmd->cmd, strlen(token)) == 0) {
463 printf("``%s'' is ambiguous.\n", token);
464 else if (found == NULL)
465 printf("unknown command: ``%s''\n", token);
478 bcopy(curbuf, oldbuf, sizeof(oldbuf));
480 printf("LDB monitor\n");
488 bcopy(oldbuf, curbuf, sizeof(curbuf));
497 #endif /* defined(LISP_FEATURE_SB_LDB) */
499 /* what we do when things go badly wrong at a low level */
501 monitor_or_something()
503 #if defined(LISP_FEATURE_SB_LDB)
506 fprintf(stderr, "There's no LDB in this build; exiting.\n");