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.
15 #include <sys/types.h>
19 #ifndef LISP_FEATURE_WIN32
20 #include <sys/resource.h>
29 /* Almost all of this file can be skipped if we're not supporting LDB. */
30 #if defined(LISP_FEATURE_SB_LDB)
40 #include "interrupt.h"
42 #include "genesis/static-symbols.h"
43 #include "genesis/primitive-objects.h"
47 /* When we need to do command input, we use this stream, which is not
48 * in general stdin, so that things will "work" (as well as being
49 * thrown into ldb can be considered "working":-) even in a process
50 * where standard input has been redirected to a file or pipe.
52 * (We could set up output to go to a special ldb_out stream for the
53 * same reason, but there's been no pressure for that so far.)
55 * The enter-the-ldb-monitor function is responsible for setting up
57 static FILE *ldb_in
= 0;
58 static int ldb_in_fd
= -1;
60 typedef void cmd(char **ptr
);
62 static cmd dump_cmd
, print_cmd
, quit_cmd
, help_cmd
;
63 static cmd flush_cmd
, search_cmd
, regs_cmd
, exit_cmd
;
64 static cmd print_context_cmd
;
65 static cmd backtrace_cmd
, purify_cmd
, catchers_cmd
;
66 static cmd grab_sigs_cmd
;
71 void (*fn
)(char **ptr
);
72 } supported_cmds
[] = {
73 {"help", "Display this help information.", help_cmd
},
74 {"?", "(an alias for help)", help_cmd
},
75 {"backtrace", "Backtrace up to N frames.", backtrace_cmd
},
76 {"catchers", "Print a list of all the active catchers.", catchers_cmd
},
77 {"context", "Print interrupt context number I.", print_context_cmd
},
78 {"dump", "Dump memory starting at ADDRESS for COUNT words.", dump_cmd
},
79 {"d", "(an alias for dump)", dump_cmd
},
80 {"exit", "Exit this instance of the monitor.", exit_cmd
},
81 {"flush", "Flush all temp variables.", flush_cmd
},
82 /* (Classic CMU CL had a "gc" command here, which seems like a
83 * reasonable idea, but the code was stale (incompatible with
84 * gencgc) so I just flushed it. -- WHN 20000814 */
85 {"grab-signals", "Set the signal handlers to call LDB.", grab_sigs_cmd
},
86 {"kill", "Kill ourself with signal number N (useful if running under gdb)",
88 {"purify", "Purify. (Caveat purifier!)", purify_cmd
},
89 {"print", "Print object at ADDRESS.", print_cmd
},
90 {"p", "(an alias for print)", print_cmd
},
91 {"quit", "Quit.", quit_cmd
},
92 {"regs", "Display current Lisp registers.", regs_cmd
},
93 {"search", "Search for TYPE starting at ADDRESS for a max of COUNT words.", search_cmd
},
94 {"s", "(an alias for search)", search_cmd
},
98 static jmp_buf curbuf
;
101 visible(unsigned char c
)
103 if (c
< ' ' || c
> '~')
112 static char *lastaddr
= 0;
113 static int lastcount
= 20;
115 char *addr
= lastaddr
;
116 int count
= lastcount
, displacement
;
119 addr
= parse_addr(ptr
);
122 count
= parse_number(ptr
);
126 printf("COUNT must be non-zero.\n");
139 while (count
-- > 0) {
140 #ifndef LISP_FEATURE_ALPHA
141 printf("0x%08lX: ", (unsigned long) addr
);
143 printf("0x%08X: ", (u32
) addr
);
145 if (is_valid_lisp_addr((os_vm_address_t
)addr
)) {
146 #ifndef LISP_FEATURE_ALPHA
147 unsigned long *lptr
= (unsigned long *)addr
;
149 u32
*lptr
= (u32
*)addr
;
151 unsigned short *sptr
= (unsigned short *)addr
;
152 unsigned char *cptr
= (unsigned char *)addr
;
154 printf("0x%08lx 0x%04x 0x%04x "
155 "0x%02x 0x%02x 0x%02x 0x%02x "
158 lptr
[0], sptr
[0], sptr
[1],
159 cptr
[0], cptr
[1], cptr
[2], cptr
[3],
160 visible(cptr
[0]), visible(cptr
[1]),
161 visible(cptr
[2]), visible(cptr
[3]));
164 printf("invalid Lisp-level address\n");
166 addr
+= displacement
;
173 print_cmd(char **ptr
)
175 lispobj obj
= parse_lispobj(ptr
);
183 #ifndef LISP_FEATURE_WIN32
184 kill(getpid(), parse_number(ptr
));
191 struct thread
*thread
=arch_os_get_current_thread();
193 printf("CSP\t=\t0x%08lx ", (unsigned long)current_control_stack_pointer
);
194 printf("CFP\t=\t0x%08lx ", (unsigned long)current_control_frame_pointer
);
197 printf("BSP\t=\t0x%08lx\n", (unsigned long)current_binding_stack_pointer
);
199 /* printf("BSP\t=\t0x%08lx\n",
200 (unsigned long)SymbolValue(BINDING_STACK_POINTER)); */
204 #ifdef LISP_FEATURE_GENCGC
205 /* printf("DYNAMIC\t=\t0x%08lx\n", DYNAMIC_SPACE_START); */
207 printf("STATIC\t=\t0x%08lx ",
208 (unsigned long)SymbolValue(STATIC_SPACE_FREE_POINTER
, thread
));
209 printf("RDONLY\t=\t0x%08lx ",
210 (unsigned long)SymbolValue(READ_ONLY_SPACE_FREE_POINTER
, thread
));
211 printf("DYNAMIC\t=\t0x%08lx\n", (unsigned long)current_dynamic_space
);
215 printf("ALLOC\t=\t0x%08lx\n", (unsigned long)dynamic_space_free_pointer
);
217 printf("ALLOC\t=\t0x%08lx\n",
218 (unsigned long)SymbolValue(ALLOCATION_POINTER
, thread
));
221 #ifndef LISP_FEATURE_GENCGC
222 printf("TRIGGER\t=\t0x%08lx\n", (unsigned long)current_auto_gc_trigger
);
227 search_cmd(char **ptr
)
229 static int lastval
= 0, lastcount
= 0;
230 static lispobj
*start
= 0, *end
= 0;
235 val
= parse_number(ptr
);
236 if (val
< 0 || val
> 0xff) {
237 printf("can only search for single bytes\n");
241 addr
= (lispobj
*)native_pointer((long)parse_addr(ptr
));
243 count
= parse_number(ptr
);
246 /* Specified value and address, but no count. Only one. */
251 /* Specified a value, but no address, so search same range. */
257 /* Specified nothing, search again for val. */
267 printf("searching for 0x%x at 0x%08lX\n", val
, (unsigned long)end
);
269 while (search_for_type(val
, &end
, &count
)) {
270 printf("found 0x%x at 0x%08lX:\n", val
, (unsigned long)end
);
274 if (widetag_of(obj
) == SIMPLE_FUN_HEADER_WIDETAG
) {
275 print((long)addr
| FUN_POINTER_LOWTAG
);
276 } else if (lowtag_of(obj
) == OTHER_IMMEDIATE_0_LOWTAG
||
277 lowtag_of(obj
) == OTHER_IMMEDIATE_1_LOWTAG
) {
278 print((lispobj
)addr
| OTHER_POINTER_LOWTAG
);
280 print((lispobj
)addr
);
287 /* (There used to be call_cmd() here, to call known-at-cold-init-time
288 * Lisp functions from ldb, but it bitrotted and was deleted in
289 * sbcl-0.7.5.1. See older CVS versions if you want to resuscitate
293 flush_cmd(char **ptr
)
303 printf("Really quit? [y] ");
305 if (fgets(buf
, sizeof(buf
), ldb_in
)) {
306 if (buf
[0] == 'y' || buf
[0] == 'Y' || buf
[0] == '\n')
309 printf("\nUnable to read response, assuming y.\n");
319 for (cmd
= supported_cmds
; cmd
->cmd
!= NULL
; cmd
++)
320 if (cmd
->help
!= NULL
)
321 printf("%s\t%s\n", cmd
->cmd
, cmd
->help
);
333 purify_cmd(char **ptr
)
339 print_context(os_context_t
*context
)
343 for (i
= 0; i
< NREGS
; i
++) {
344 printf("%s:\t", lisp_register_names
[i
]);
345 #ifdef LISP_FEATURE_X86
346 brief_print((lispobj
)(*os_context_register_addr(context
,
349 brief_print((lispobj
)(*os_context_register_addr(context
,i
)));
352 #ifdef LISP_FEATURE_DARWIN
353 printf("DAR:\t\t 0x%08lx\n", (unsigned long)(*os_context_register_addr(context
, 41)));
354 printf("DSISR:\t\t 0x%08lx\n", (unsigned long)(*os_context_register_addr(context
, 42)));
356 printf("PC:\t\t 0x%08lx\n",
357 (unsigned long)(*os_context_pc_addr(context
)));
361 print_context_cmd(char **ptr
)
364 struct thread
*thread
=arch_os_get_current_thread();
366 free_ici
= fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX
,thread
));
371 index
= parse_number(ptr
);
373 if ((index
>= 0) && (index
< free_ici
)) {
374 printf("There are %d interrupt contexts.\n", free_ici
);
375 printf("printing context %d\n", index
);
376 print_context(thread
->interrupt_contexts
[index
]);
378 printf("There aren't that many/few contexts.\n");
379 printf("There are %d interrupt contexts.\n", free_ici
);
383 printf("There are no interrupt contexts!\n");
385 printf("There are %d interrupt contexts.\n", free_ici
);
386 printf("printing context %d\n", free_ici
- 1);
387 print_context(thread
->interrupt_contexts
[free_ici
- 1]);
393 backtrace_cmd(char **ptr
)
395 void backtrace(int frames
);
399 n
= parse_number(ptr
);
403 printf("Backtrace:\n");
408 catchers_cmd(char **ptr
)
410 struct catch_block
*catch;
411 struct thread
*thread
=arch_os_get_current_thread();
413 catch = (struct catch_block
*)SymbolValue(CURRENT_CATCH_BLOCK
,thread
);
416 printf("There are no active catchers!\n");
418 while (catch != NULL
) {
419 printf("0x%08lX:\n\tuwp: 0x%08lX\n\tfp: 0x%08lX\n\t"
420 "code: 0x%08lX\n\tentry: 0x%08lX\n\ttag: ",
421 (unsigned long)catch,
422 (unsigned long)(catch->current_uwp
),
423 (unsigned long)(catch->current_cont
),
424 #if defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64)
425 (unsigned long)component_ptr_from_pc((void*)catch->entry_pc
)
426 + OTHER_POINTER_LOWTAG
,
428 (unsigned long)(catch->current_code
),
430 (unsigned long)(catch->entry_pc
));
431 brief_print((lispobj
)catch->tag
);
432 catch = catch->previous_catch
;
438 grab_sigs_cmd(char **ptr
)
440 extern void sigint_init(void);
442 printf("Grabbing signals.\n");
449 struct cmd
*cmd
, *found
;
451 char *line
, *ptr
, *token
;
455 #ifndef LISP_FEATURE_WIN32
456 ldb_in
= fopen("/dev/tty","r+");
460 ldb_in_fd
= fileno(ldb_in
);
466 line
= fgets(buf
, sizeof(buf
), ldb_in
);
471 if ((token
= parse_token(&ptr
)) == NULL
)
475 for (cmd
= supported_cmds
; cmd
->cmd
!= NULL
; cmd
++) {
476 if (strcmp(token
, cmd
->cmd
) == 0) {
481 else if (strncmp(token
, cmd
->cmd
, strlen(token
)) == 0) {
489 printf("``%s'' is ambiguous.\n", token
);
490 else if (found
== NULL
)
491 printf("unknown command: ``%s''\n", token
);
504 bcopy(curbuf
, oldbuf
, sizeof(oldbuf
));
506 printf("Welcome to LDB, a low-level debugger for the Lisp runtime environment.\n");
514 bcopy(oldbuf
, curbuf
, sizeof(curbuf
));
523 #endif /* defined(LISP_FEATURE_SB_LDB) */
525 /* what we do when things go badly wrong at a low level */
527 monitor_or_something()
529 #if defined(LISP_FEATURE_SB_LDB)
533 "The system is too badly corrupted or confused to continue at the Lisp\n\
534 level. If the system had been compiled with the SB-LDB feature, we'd drop\n\
535 into the LDB low-level debugger now. But there's no LDB in this build, so\n\
536 we can't really do anything but just exit, sorry.\n");