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/*
This code was written as part of the CMU Common Lisp project at
Carnegie Mellon University, and has been placed in the public domain.
*/
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#include <setjmp.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <signal.h>
#include "lisp.h"
#include "internals.h"
#include "globals.h"
#include "vars.h"
#include "parse.h"
#include "interrupt.h"
#include "lispregs.h"
#include "monitor.h"
#include "print.h"
#include "arch.h"
#include "gc.h"
#include "search.h"
#include "purify.h"
extern boolean isatty(int fd);
typedef void cmd(char **ptr);
static cmd call_cmd, dump_cmd, print_cmd, quit, help;
static cmd flush_cmd, search_cmd, regs_cmd, exit_cmd;
static cmd gc_cmd, print_context_cmd;
static cmd backtrace_cmd, purify_cmd, catchers_cmd;
static cmd grab_sigs_cmd;
static struct cmd {
char *cmd, *help;
void (*fn) (char **ptr);
{"help", "Display this info", help},
{"?", NULL, help},
{"backtrace", "backtrace up to N frames", backtrace_cmd},
{"call", "call FUNCTION with ARG1, ARG2, ...", call_cmd},
{"catchers", "Print a list of all the active catchers.", catchers_cmd},
{"context", "print interrupt context number I.", print_context_cmd},
{"dump", "dump memory starting at ADDRESS for COUNT words.", dump_cmd},
{"d", NULL, dump_cmd},
{"exit", "Exit this instance of the monitor.", exit_cmd},
{"flush", "flush all temp variables.", flush_cmd},
{"gc", "collect garbage (caveat collector).", gc_cmd},
{"grab-signals", "Set the signal handlers to call LDB.", grab_sigs_cmd},
{"purify", "purify (caveat purifier).", purify_cmd},
{"print", "print object at ADDRESS.", print_cmd},
{"p", NULL, print_cmd},
{"quit", "quit.", quit},
{"regs", "display current lisp regs.", regs_cmd},
{"search", "search for TYPE starting at ADDRESS for a max of COUNT words.", search_cmd},
{"s", NULL, search_cmd},
{NULL, NULL, NULL}
static int
visable(unsigned char c)
static void
dump_cmd(char **ptr)
{
static char *lastaddr = 0;
static int lastcount = 20;
char *addr = lastaddr;
int count = lastcount, displacement;
if (more_p(ptr)) {
addr = parse_addr(ptr);
if (more_p(ptr))
count = parse_number(ptr);
printf("COUNT must be non-zero.\n");
return;
displacement = -4;
count = -count;
printf("0x%08lX: ", (unsigned long) addr);
printf("0x%08X: ", (u32) addr);
if (valid_addr((os_vm_address_t) addr)) {
unsigned long *lptr = (unsigned long *) addr;
u32 *lptr = (unsigned long *) addr;
unsigned short *sptr = (unsigned short *) addr;
unsigned char *cptr = (unsigned char *) addr;
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],
visable(cptr[0]), visable(cptr[1]), visable(cptr[2]),
visable(cptr[3]));
} else
printf("invalid address\n");
addr += displacement;
static void
print_cmd(char **ptr)
static void
regs_cmd(char **ptr)
printf("CSP\t=\t0x%08lX\n", (unsigned long) current_control_stack_pointer);
printf("FP\t=\t0x%08lX\n", (unsigned long) current_control_frame_pointer);
printf("BSP\t=\t0x%08lX\n", (unsigned long) current_binding_stack_pointer);
printf("BSP\t=\t0x%08lX\n", SymbolValue(BINDING_STACK_POINTER));
printf("DYNAMIC\t=\t0x%08lX\n", (unsigned long) current_dynamic_space);
printf("ALLOC\t=\t0x%08lX\n", SymbolValue(ALLOCATION_POINTER));
printf("TRIGGER\t=\t0x%08lX\n", SymbolValue(INTERNAL_GC_TRIGGER));
printf("ALLOC\t=\t0x%08lX\n",
(unsigned long) current_dynamic_space_free_pointer);
printf("TRIGGER\t=\t0x%08lX\n", (unsigned long) current_auto_gc_trigger);
printf("STATIC\t=\t0x%08lX\n", SymbolValue(STATIC_SPACE_FREE_POINTER));
printf("RDONLY\t=\t0x%08lX\n", SymbolValue(READ_ONLY_SPACE_FREE_POINTER));
#ifdef MIPS
printf("FLAGS\t=\t0x%08x\n", current_flags_register);
#endif
}
static void
search_cmd(char **ptr)
{
static int lastval = 0, lastcount = 0;
static lispobj *start = 0, *end = 0;
int val, count;
lispobj *addr, obj;
if (more_p(ptr)) {
val = parse_number(ptr);
if (val < 0 || val > 0xff) {
printf("Can only search for single bytes.\n");
return;
}
if (more_p(ptr)) {
addr = (lispobj *) PTR((long) parse_addr(ptr));
if (more_p(ptr)) {
count = parse_number(ptr);
} else {
/* Speced value and address, but no count. Only one. */
count = -1;
}
} else {
/* Speced a value, but no address, so search same range. */
addr = start;
count = lastcount;
}
} else {
/* Speced nothing, search again for val. */
val = lastval;
addr = end;
count = lastcount;
}
lastval = val;
start = end = addr;
lastcount = count;
printf("searching for 0x%x at 0x%08lX\n", val, (unsigned long) end);
printf("found 0x%x at 0x%08lX:\n", val, (unsigned long) end);
obj = *end;
addr = end;
end += 2;
if (TypeOf(obj) == type_FunctionHeader)
print((long) addr | type_FunctionPointer);
else if (LowtagOf(obj) == type_OtherImmediate0
|| LowtagOf(obj) ==
type_OtherImmediate1) print((lispobj) addr |
type_OtherPointer);
else
print((lispobj) addr);
if (count == -1)
return;
static void
call_cmd(char **ptr)
lispobj thing = parse_lispobj(ptr);
lispobj function, cons, args[3];
lispobj result = NIL;
int numargs;
if (LowtagOf(thing) == type_OtherPointer) {
switch (TypeOf(*(lispobj *) (thing - type_OtherPointer))) {
for (cons = SymbolValue(INITIAL_FDEFN_OBJECTS);
cons != NIL; cons = CONS(cons)->cdr) {
if (FDEFN(CONS(cons)->car)->name == thing) {
thing = CONS(cons)->car;
goto fdefn;
}
}
printf("symbol 0x%08lx is undefined.\n", thing);
return;
fdefn:
function = FDEFN(thing)->function;
if (function == NIL) {
printf("fdefn 0x%08lx is undefined.\n", thing);
return;
}
break;
printf
("0x%08lx is not a function pointer, symbol, or fdefn object.\n",
} else if (LowtagOf(thing) != type_FunctionPointer) {
printf("0x%08lx is not a function pointer, symbol, or fdefn object.\n",
function = thing;
numargs = 0;
while (more_p(ptr)) {
if (numargs >= 3) {
printf("Too many arguments. 3 at most.\n");
return;
}
args[numargs++] = parse_lispobj(ptr);
}
switch (numargs) {
case 0:
result = funcall0(function);
break;
result = funcall1(function, args[0]);
break;
result = funcall2(function, args[0], args[1]);
break;
result = funcall3(function, args[0], args[1], args[2]);
break;
static void
flush_cmd(char **ptr)
static void
quit(char **ptr)
result = fgets(buf, sizeof(buf), stdin);
if (result && (buf[0] == 'y' || buf[0] == 'Y' || buf[0] == '\n')) {
static void
help(char **ptr)
{
struct cmd *cmd;
for (cmd = Cmds; cmd->cmd != NULL; cmd++)
if (cmd->help != NULL)
printf("%s\t%s\n", cmd->cmd, cmd->help);
static void
exit_cmd(char **ptr)
static void
gc_cmd(char **ptr)
static void
purify_cmd(char **ptr)
static void
print_context(os_context_t * context)
for (i = 0; i < NREGS; i++) {
printf("%s:\t", lisp_register_names[i]);
brief_print((lispobj) SC_REG(context, i * 2));
brief_print((lispobj) SC_REG(context, i));
}
printf("PC:\t\t 0x%08lx\n", (unsigned long) SC_PC(context));
static void
print_context_cmd(char **ptr)
int free;
free = SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX) >> 2;
if (more_p(ptr)) {
int index;
index = parse_number(ptr);
if ((index >= 0) && (index < free)) {
printf("There are %d interrupt contexts.\n", free);
printf("Printing context %d\n", index);
print_context(lisp_interrupt_contexts[index]);
printf("There aren't that many/few contexts.\n");
printf("There are %d interrupt contexts.\n", free);
}
} else {
if (free == 0)
printf("There are no interrupt contexts!\n");
else {
printf("There are %d interrupt contexts.\n", free);
printf("Printing context %d\n", free - 1);
print_context(lisp_interrupt_contexts[free - 1]);
static void
backtrace_cmd(char **ptr)
{
void backtrace(int frames);
int n;
if (more_p(ptr))
n = parse_number(ptr);
else
n = 100;
printf("Backtrace:\n");
backtrace(n);
}
static void
catchers_cmd(char **ptr)
catch = (struct catch_block *) SymbolValue(CURRENT_CATCH_BLOCK);
printf("There are no active catchers!\n");
while (catch != NULL) {
printf
("0x%08lX:\n\tuwp: 0x%08lX\n\tfp: 0x%08lX\n\tcode: 0x%08lx\n\tentry: 0x%08lx\n\ttag: ",
(unsigned long) catch, (unsigned long) (catch->current_uwp),
(unsigned long) (catch->current_cont), catch->current_code,
catch->entry_pc);
printf
("0x%08lX:\n\tuwp: 0x%08lX\n\tfp: 0x%08lX\n\tcode: 0x%p\n\tentry: 0x%08lx\n\ttag: ",
(unsigned long) catch, (unsigned long) (catch->current_uwp),
(unsigned long) (catch->current_cont),
component_ptr_from_pc((lispobj *) catch->entry_pc) +
type_OtherPointer, catch->entry_pc);
brief_print((lispobj) catch->tag);
catch = catch->previous_catch;
}
static void
grab_sigs_cmd(char **ptr)
{
extern void sigint_init(void);
printf("Grabbing signals.\n");
sigint_init();
}
static void
sub_monitor(void)
{
struct cmd *cmd, *found;
char buf[256];
char *line, *ptr, *token;
int ambig;
while (!done) {
printf("ldb> ");
fflush(stdout);
line = fgets(buf, sizeof(buf), stdin);
if (line == NULL) {
/*
* We can no longer read anything from stdin, so
* just exit this loop instead of spewing an
* endless stream of prompts. This also means we
* can't use ldb anymore because stdin is
* unreadable.
*/
break;
ptr = line;
if ((token = parse_token(&ptr)) == NULL)
continue;
ambig = 0;
found = NULL;
for (cmd = Cmds; cmd->cmd != NULL; cmd++) {
if (strcmp(token, cmd->cmd) == 0) {
found = cmd;
ambig = 0;
break;
} else if (strncmp(token, cmd->cmd, strlen(token)) == 0) {
if (found)
ambig = 1;
else
found = cmd;
}
}
if (ambig)
printf("``%s'' is ambiguous.\n", token);
else if (found == NULL)
printf("unknown command: ``%s''\n", token);
else {
reset_printer();
(*found->fn) (&ptr);
}
ldb_monitor(void)
memcpy(oldbuf, curbuf, sizeof(jmp_buf));
printf("LDB monitor\n");
setjmp(curbuf);
sub_monitor();
done = FALSE;
memcpy(curbuf, oldbuf, sizeof(jmp_buf));
throw_to_monitor(void)