* files for more information.
*/
+/* needed if we want dladdr() and Dl_Info from glibc's dlfcn.h */
+#define _GNU_SOURCE
+
#include <stdio.h>
#include <signal.h>
#include "sbcl.h"
#include "interrupt.h"
#include "lispregs.h"
#ifdef LISP_FEATURE_GENCGC
+#include <wchar.h>
+#include "arch.h"
#include "gencgc-alloc-region.h"
+#include "genesis/compiled-debug-fun.h"
+#include "genesis/compiled-debug-info.h"
+#include "genesis/package.h"
#endif
#include "genesis/static-symbols.h"
#include "genesis/primitive-objects.h"
#include "thread.h"
+#ifdef LISP_FEATURE_OS_PROVIDES_DLADDR
+# include <dlfcn.h>
+#endif
+
#if !(defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
/* KLUDGE: Sigh ... I know what the call frame looks like and it had
{
struct thread *thread=arch_os_get_current_thread();
return (((char *) thread->control_stack_start <= (char *) pointer) &&
- ((char *) pointer < (char *) current_control_stack_pointer));
+ ((char *) pointer < (char *) access_control_stack_pointer(thread)));
}
static void
call_info_from_lisp_state(struct call_info *info)
{
- info->frame = (struct call_frame *)current_control_frame_pointer;
+ info->frame = (struct call_frame *)access_control_frame_pointer(arch_os_get_current_thread());
info->interrupted = 0;
info->code = NULL;
info->lra = 0;
static void
call_info_from_context(struct call_info *info, os_context_t *context)
{
- unsigned long pc;
+ uword_t pc;
info->interrupted = 1;
if (lowtag_of(*os_context_register_addr(context, reg_CODE))
/* We tried to call a function, but crapped out before $CODE could
* be fixed up. Probably an undefined function. */
info->frame =
- (struct call_frame *)(*os_context_register_addr(context,
- reg_OCFP));
+ (struct call_frame *)(uword_t)
+ (*os_context_register_addr(context, reg_OCFP));
info->lra = (lispobj)(*os_context_register_addr(context, reg_LRA));
info->code = code_pointer(info->lra);
- pc = (unsigned long)native_pointer(info->lra);
+ pc = (uword_t)native_pointer(info->lra);
}
else {
info->frame =
- (struct call_frame *)(*os_context_register_addr(context, reg_CFP));
+ (struct call_frame *)(uword_t)
+ (*os_context_register_addr(context, reg_CFP));
info->code =
code_pointer(*os_context_register_addr(context, reg_CODE));
info->lra = NIL;
pc = *os_context_pc_addr(context);
}
if (info->code != NULL)
- info->pc = pc - (unsigned long) info->code -
+ info->pc = pc - (uword_t) info->code -
#ifndef LISP_FEATURE_ALPHA
(HEADER_LENGTH(info->code->header) * sizeof(lispobj));
#else
{
struct call_frame *this_frame;
struct thread *thread=arch_os_get_current_thread();
- int free;
+ int free_ici;
if (!cs_valid_pointer_p(info->frame)) {
- printf("Bogus callee value (0x%08lx).\n", (unsigned long)info->frame);
+ printf("Bogus callee value (0x%08lx).\n", (uword_t)info->frame);
return 0;
}
if (info->lra == NIL) {
/* We were interrupted. Find the correct signal context. */
- free = SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,thread)>>2;
- while (free-- > 0) {
+ free_ici = fixnum_value(SymbolValue(FREE_INTERRUPT_CONTEXT_INDEX,thread));
+ while (free_ici-- > 0) {
os_context_t *context =
- thread->interrupt_contexts[free];
- if ((struct call_frame *)(*os_context_register_addr(context,
- reg_CFP))
+ thread->interrupt_contexts[free_ici];
+ if ((struct call_frame *)(uword_t)
+ (*os_context_register_addr(context, reg_CFP))
== info->frame) {
call_info_from_context(info, context);
break;
else {
info->code = code_pointer(info->lra);
if (info->code != NULL)
- info->pc = (unsigned long)native_pointer(info->lra) -
- (unsigned long)info->code -
+ info->pc = (uword_t)native_pointer(info->lra) -
+ (uword_t)info->code -
#ifndef LISP_FEATURE_ALPHA
(HEADER_LENGTH(info->code->header) * sizeof(lispobj));
#else
}
void
-backtrace(int nframes)
+lisp_backtrace(int nframes)
{
struct call_info info;
call_info_from_lisp_state(&info);
do {
- printf("<Frame 0x%08lx%s, ", (unsigned long) info.frame,
+ printf("<Frame 0x%08lx%s, ", (uword_t) info.frame,
info.interrupted ? " [interrupted]" : "");
if (info.code != (struct code *) 0) {
lispobj function;
- printf("CODE: 0x%08lX, ", (unsigned long) info.code | OTHER_POINTER_LOWTAG);
+ printf("CODE: 0x%08lX, ", (uword_t) info.code | OTHER_POINTER_LOWTAG);
#ifndef LISP_FEATURE_ALPHA
function = info.code->entry_points;
printf("CODE: ???, ");
if (info.lra != NIL)
- printf("LRA: 0x%08lx, ", (unsigned long)info.lra);
+ printf("LRA: 0x%08lx, ", (uword_t)info.lra);
else
printf("<no LRA>, ");
#else
+static int
+altstack_pointer_p (void *p) {
+#ifndef LISP_FEATURE_WIN32
+ void* stack_start = ((void *)arch_os_get_current_thread()) + dynamic_values_bytes;
+ void* stack_end = stack_start + 32*SIGSTKSZ;
+
+ return (p > stack_start && p <= stack_end);
+#else
+ /* Win32 doesn't do altstack */
+ return 0;
+#endif
+}
+
+static int
+stack_pointer_p (void *p)
+{
+ /* we are using sizeof(long) here, because that is the right value on both
+ * x86 and x86-64. (But note that false positives would not cause much harm
+ * given the heuristical nature of x86_call_context.) */
+ uword_t stack_alignment = sizeof(void*);
+
+ return (altstack_pointer_p(p)
+ || (p < (void *) arch_os_get_current_thread()->control_stack_end
+ && (p > (void *) &p || altstack_pointer_p(&p))
+ && (((uword_t) p) & (stack_alignment-1)) == 0));
+}
+
+static int
+ra_pointer_p (void *ra)
+{
+ /* the check against 4096 is still a mystery to everyone interviewed about
+ * it, but recent changes to sb-sprof seem to suggest that such values
+ * do occur sometimes. */
+ return ((uword_t) ra) > 4096 && !stack_pointer_p (ra);
+}
+
+static int
+x86_call_context (void *fp, void **ra, void **ocfp)
+{
+ void *c_ocfp;
+ void *c_ra;
+ int c_valid_p;
+
+ if (!stack_pointer_p(fp))
+ return 0;
+
+ c_ocfp = *((void **) fp);
+ c_ra = *((void **) fp + 1);
+
+ c_valid_p = (c_ocfp > fp
+ && stack_pointer_p(c_ocfp)
+ && ra_pointer_p(c_ra));
+
+ if (c_valid_p)
+ *ra = c_ra, *ocfp = c_ocfp;
+ else
+ return 0;
+
+ return 1;
+}
+
+struct compiled_debug_fun *
+debug_function_from_pc (struct code* code, void *pc)
+{
+ uword_t code_header_len = sizeof(lispobj) * HeaderValue(code->header);
+ uword_t offset
+ = (uword_t) pc - (uword_t) code - code_header_len;
+ struct compiled_debug_fun *df;
+ struct compiled_debug_info *di;
+ struct vector *v;
+ int i, len;
+
+ if (lowtag_of(code->debug_info) != INSTANCE_POINTER_LOWTAG)
+ return 0;
+
+ di = (struct compiled_debug_info *) native_pointer(code->debug_info);
+ v = (struct vector *) native_pointer(di->fun_map);
+ len = fixnum_value(v->length);
+ df = (struct compiled_debug_fun *) native_pointer(v->data[0]);
+
+ if (len == 1)
+ return df;
+
+ for (i = 1;; i += 2) {
+ unsigned next_pc;
+
+ if (i == len)
+ return ((struct compiled_debug_fun *) native_pointer(v->data[i - 1]));
+
+ if (offset >= (uword_t)fixnum_value(df->elsewhere_pc)) {
+ struct compiled_debug_fun *p
+ = ((struct compiled_debug_fun *) native_pointer(v->data[i + 1]));
+ next_pc = fixnum_value(p->elsewhere_pc);
+ } else
+ next_pc = fixnum_value(v->data[i]);
+
+ if (offset < next_pc)
+ return ((struct compiled_debug_fun *) native_pointer(v->data[i - 1]));
+ }
+
+ return NULL;
+}
+static void
+sbcl_putwc(wchar_t c, FILE *file)
+{
+#ifdef LISP_FEATURE_OS_PROVIDES_PUTWC
+ putwc(c, file);
+#else
+ if (c < 256) {
+ fputc(c, file);
+ } else {
+ fputc('?', file);
+ }
+#endif
+}
+
+static void
+print_string (lispobj *object)
+{
+ int tag = widetag_of(*object);
+ struct vector *vector = (struct vector *) object;
+
+#define doit(TYPE) \
+ do { \
+ int i; \
+ int n = fixnum_value(vector->length); \
+ TYPE *data = (TYPE *) vector->data; \
+ for (i = 0; i < n; i++) { \
+ wchar_t c = (wchar_t) data[i]; \
+ if (c == '\\' || c == '"') \
+ putchar('\\'); \
+ sbcl_putwc(c, stdout); \
+ } \
+ } while (0)
+
+ switch (tag) {
+ case SIMPLE_BASE_STRING_WIDETAG:
+ doit(unsigned char);
+ break;
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+ case SIMPLE_CHARACTER_STRING_WIDETAG:
+ doit(unsigned int);
+ break;
+#endif
+ default:
+ printf("<??? type %d>", tag);
+ }
+#undef doit
+}
+
+static void
+print_entry_name (lispobj name)
+{
+ if (lowtag_of (name) == LIST_POINTER_LOWTAG) {
+ putchar('(');
+ while (name != NIL) {
+ struct cons *cons = (struct cons *) native_pointer(name);
+ print_entry_name(cons->car);
+ name = cons->cdr;
+ if (name != NIL)
+ putchar(' ');
+ }
+ putchar(')');
+ } else if (lowtag_of(name) == OTHER_POINTER_LOWTAG) {
+ lispobj *object = (lispobj *) native_pointer(name);
+ if (widetag_of(*object) == SYMBOL_HEADER_WIDETAG) {
+ struct symbol *symbol = (struct symbol *) object;
+ if (symbol->package != NIL) {
+ struct package *pkg
+ = (struct package *) native_pointer(symbol->package);
+ lispobj pkg_name = pkg->_name;
+ print_string(native_pointer(pkg_name));
+ fputs("::", stdout);
+ }
+ print_string(native_pointer(symbol->name));
+ } else if (widetag_of(*object) == SIMPLE_BASE_STRING_WIDETAG) {
+ putchar('"');
+ print_string(object);
+ putchar('"');
+#ifdef SIMPLE_CHARACTER_STRING_WIDETAG
+ } else if (widetag_of(*object) == SIMPLE_CHARACTER_STRING_WIDETAG) {
+ putchar('"');
+ print_string(object);
+ putchar('"');
+#endif
+ } else {
+ printf("<??? type %d>", (int) widetag_of(*object));
+ }
+ } else {
+ printf("<??? lowtag %d>", (int) lowtag_of(name));
+ }
+}
+
+static void
+print_entry_points (struct code *code)
+{
+ lispobj function = code->entry_points;
+
+ while (function != NIL) {
+ struct simple_fun *header = (struct simple_fun *) native_pointer(function);
+ print_entry_name(header->name);
+
+ function = header->next;
+ if (function != NIL)
+ printf (", ");
+ }
+}
void
-backtrace(int nframes)
+describe_thread_state(void)
{
- printf("Can't backtrace on this hardware platform.\n");
+ sigset_t mask;
+ struct thread *thread = arch_os_get_current_thread();
+ struct interrupt_data *data = thread->interrupt_data;
+#ifndef LISP_FEATURE_WIN32
+ get_current_sigmask(&mask);
+ printf("Signal mask:\n");
+ printf(" SIGALRM = %d\n", sigismember(&mask, SIGALRM));
+ printf(" SIGINT = %d\n", sigismember(&mask, SIGINT));
+ printf(" SIGPROF = %d\n", sigismember(&mask, SIGPROF));
+#ifdef SIG_STOP_FOR_GC
+ printf(" SIG_STOP_FOR_GC = %d\n", sigismember(&mask, SIG_STOP_FOR_GC));
+#endif
+#endif
+ printf("Specials:\n");
+ printf(" *GC-INHIBIT* = %s\n", (SymbolValue(GC_INHIBIT, thread) == T) ? "T" : "NIL");
+ printf(" *GC-PENDING* = %s\n",
+ (SymbolValue(GC_PENDING, thread) == T) ?
+ "T" : ((SymbolValue(GC_PENDING, thread) == NIL) ?
+ "NIL" : ":IN-PROGRESS"));
+ printf(" *INTERRUPTS-ENABLED* = %s\n", (SymbolValue(INTERRUPTS_ENABLED, thread) == T) ? "T" : "NIL");
+#ifdef STOP_FOR_GC_PENDING
+ printf(" *STOP-FOR-GC-PENDING* = %s\n", (SymbolValue(STOP_FOR_GC_PENDING, thread) == T) ? "T" : "NIL");
+#endif
+ printf("Pending handler = %p\n", data->pending_handler);
+}
+
+/* This function has been split from lisp_backtrace() to enable Lisp
+ * backtraces from gdb with call backtrace_from_fp(...). Useful for
+ * example when debugging threading deadlocks.
+ */
+void
+backtrace_from_fp(void *fp, int nframes)
+{
+ int i;
+
+ for (i = 0; i < nframes; ++i) {
+ lispobj *p;
+ void *ra;
+ void *next_fp;
+
+ if (!x86_call_context(fp, &ra, &next_fp))
+ break;
+
+ printf("%4d: ", i);
+
+ p = (lispobj *) component_ptr_from_pc((lispobj *) ra);
+ if (p) {
+ struct code *cp = (struct code *) p;
+ struct compiled_debug_fun *df = debug_function_from_pc(cp, ra);
+ if (df)
+ print_entry_name(df->name);
+ else
+ print_entry_points(cp);
+ } else {
+#ifdef LISP_FEATURE_OS_PROVIDES_DLADDR
+ Dl_info info;
+ if (dladdr(ra, &info)) {
+ printf("Foreign function %s, fp = 0x%lx, ra = 0x%lx",
+ info.dli_sname,
+ (uword_t) next_fp,
+ (uword_t) ra);
+ } else
+#endif
+ printf("Foreign fp = 0x%p, ra = 0x%p",
+ (void*) next_fp,
+ (void*) ra);
+ }
+
+ putchar('\n');
+ fp = next_fp;
+ }
+}
+
+void
+lisp_backtrace(int nframes)
+{
+ void *fp;
+
+#if defined(LISP_FEATURE_X86)
+ asm("movl %%ebp,%0" : "=g" (fp));
+#elif defined (LISP_FEATURE_X86_64)
+ asm("movq %%rbp,%0" : "=g" (fp));
+#else
+#error "How did we get here?"
+#endif
+
+ backtrace_from_fp(fp, nframes);
}
#endif
projects / sbcl.git / blobdiff