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ruby/debug.c

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/**********************************************************************
debug.c -
$Author$
created at: 04/08/25 02:31:54 JST
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#include "ruby/internal/config.h"
#include <stdio.h>
#include "eval_intern.h"
#include "encindex.h"
#include "id.h"
#include "internal/signal.h"
#include "ruby/encoding.h"
#include "ruby/io.h"
#include "ruby/ruby.h"
#include "ruby/util.h"
#include "symbol.h"
#include "vm_core.h"
#include "vm_debug.h"
#include "vm_callinfo.h"
#include "ruby/thread_native.h"
#include "ractor_core.h"
/* This is the only place struct RIMemo is actually used */
struct RIMemo {
VALUE flags;
VALUE v0;
VALUE v1;
VALUE v2;
VALUE v3;
};
/* for gdb */
const union {
enum ruby_special_consts special_consts;
enum ruby_value_type value_type;
enum ruby_tag_type tag_type;
enum node_type node_type;
enum ruby_method_ids method_ids;
enum ruby_id_types id_types;
enum ruby_fl_type fl_types;
enum ruby_fl_ushift fl_ushift;
enum ruby_encoding_consts encoding_consts;
enum ruby_coderange_type enc_coderange_types;
enum ruby_econv_flag_type econv_flag_types;
rb_econv_result_t econv_result;
enum ruby_preserved_encindex encoding_index;
enum ruby_robject_flags robject_flags;
enum ruby_rmodule_flags rmodule_flags;
enum ruby_rstring_flags rstring_flags;
enum ruby_rarray_flags rarray_flags;
enum ruby_rarray_consts rarray_consts;
enum {
RUBY_FMODE_READABLE = FMODE_READABLE,
RUBY_FMODE_WRITABLE = FMODE_WRITABLE,
RUBY_FMODE_READWRITE = FMODE_READWRITE,
RUBY_FMODE_BINMODE = FMODE_BINMODE,
RUBY_FMODE_SYNC = FMODE_SYNC,
RUBY_FMODE_TTY = FMODE_TTY,
RUBY_FMODE_DUPLEX = FMODE_DUPLEX,
RUBY_FMODE_APPEND = FMODE_APPEND,
RUBY_FMODE_CREATE = FMODE_CREATE,
RUBY_FMODE_NOREVLOOKUP = 0x00000100,
RUBY_FMODE_TRUNC = FMODE_TRUNC,
RUBY_FMODE_TEXTMODE = FMODE_TEXTMODE,
RUBY_FMODE_EXTERNAL = 0x00010000,
RUBY_FMODE_SETENC_BY_BOM = FMODE_SETENC_BY_BOM,
RUBY_FMODE_UNIX = 0x00200000,
RUBY_FMODE_INET = 0x00400000,
RUBY_FMODE_INET6 = 0x00800000,
RUBY_NODE_TYPESHIFT = NODE_TYPESHIFT,
RUBY_NODE_TYPEMASK = NODE_TYPEMASK,
RUBY_NODE_LSHIFT = NODE_LSHIFT,
RUBY_NODE_FL_NEWLINE = NODE_FL_NEWLINE
} various;
union {
enum imemo_type types;
enum {RUBY_IMEMO_MASK = IMEMO_MASK} mask;
struct RIMemo *ptr;
} imemo;
struct RSymbol *symbol_ptr;
enum vm_call_flag_bits vm_call_flags;
} ruby_dummy_gdb_enums;
const SIGNED_VALUE RUBY_NODE_LMASK = NODE_LMASK;
int
ruby_debug_print_indent(int level, int debug_level, int indent_level)
{
if (level < debug_level) {
fprintf(stderr, "%*s", indent_level, "");
fflush(stderr);
return TRUE;
}
return FALSE;
}
void
ruby_debug_printf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
}
#include "internal/gc.h"
VALUE
ruby_debug_print_value(int level, int debug_level, const char *header, VALUE obj)
{
if (level < debug_level) {
char buff[0x100];
rb_raw_obj_info(buff, 0x100, obj);
fprintf(stderr, "DBG> %s: %s\n", header, buff);
fflush(stderr);
}
return obj;
}
void
ruby_debug_print_v(VALUE v)
{
ruby_debug_print_value(0, 1, "", v);
}
ID
ruby_debug_print_id(int level, int debug_level, const char *header, ID id)
{
if (level < debug_level) {
fprintf(stderr, "DBG> %s: %s\n", header, rb_id2name(id));
fflush(stderr);
}
return id;
}
NODE *
ruby_debug_print_node(int level, int debug_level, const char *header, const NODE *node)
{
if (level < debug_level) {
fprintf(stderr, "DBG> %s: %s (%u)\n", header,
ruby_node_name(nd_type(node)), nd_line(node));
}
return (NODE *)node;
}
void
ruby_debug_breakpoint(void)
{
/* */
}
#if defined _WIN32
# if RUBY_MSVCRT_VERSION >= 80
extern int ruby_w32_rtc_error;
# endif
#endif
#if defined _WIN32 || defined __CYGWIN__
#include <windows.h>
UINT ruby_w32_codepage[2];
#endif
extern int ruby_rgengc_debug;
extern int ruby_on_ci;
int
ruby_env_debug_option(const char *str, int len, void *arg)
{
int ov;
size_t retlen;
unsigned long n;
#define SET_WHEN(name, var, val) do { \
if (len == sizeof(name) - 1 && \
strncmp(str, (name), len) == 0) { \
(var) = (val); \
return 1; \
} \
} while (0)
#define NAME_MATCH_VALUE(name) \
((size_t)len >= sizeof(name)-1 && \
strncmp(str, (name), sizeof(name)-1) == 0 && \
((len == sizeof(name)-1 && !(len = 0)) || \
(str[sizeof(name)-1] == '=' && \
(str += sizeof(name), len -= sizeof(name), 1))))
#define SET_UINT(val) do { \
n = ruby_scan_digits(str, len, 10, &retlen, &ov); \
if (!ov && retlen) { \
val = (unsigned int)n; \
} \
str += retlen; \
len -= retlen; \
} while (0)
#define SET_UINT_LIST(name, vals, num) do { \
int i; \
for (i = 0; i < (num); ++i) { \
SET_UINT((vals)[i]); \
if (!len || *str != ':') break; \
++str; \
--len; \
} \
if (len > 0) { \
fprintf(stderr, "ignored "name" option: `%.*s'\n", len, str); \
} \
} while (0)
#define SET_WHEN_UINT(name, vals, num, req) \
if (NAME_MATCH_VALUE(name)) SET_UINT_LIST(name, vals, num);
SET_WHEN("gc_stress", *ruby_initial_gc_stress_ptr, Qtrue);
SET_WHEN("core", ruby_enable_coredump, 1);
SET_WHEN("ci", ruby_on_ci, 1);
if (NAME_MATCH_VALUE("rgengc")) {
if (!len) ruby_rgengc_debug = 1;
else SET_UINT_LIST("rgengc", &ruby_rgengc_debug, 1);
return 1;
}
#if defined _WIN32
# if RUBY_MSVCRT_VERSION >= 80
SET_WHEN("rtc_error", ruby_w32_rtc_error, 1);
# endif
#endif
#if defined _WIN32 || defined __CYGWIN__
if (NAME_MATCH_VALUE("codepage")) {
if (!len) fprintf(stderr, "missing codepage argument");
else SET_UINT_LIST("codepage", ruby_w32_codepage, numberof(ruby_w32_codepage));
return 1;
}
#endif
return 0;
}
static void
set_debug_option(const char *str, int len, void *arg)
{
if (!ruby_env_debug_option(str, len, arg)) {
fprintf(stderr, "unexpected debug option: %.*s\n", len, str);
}
}
#if USE_RUBY_DEBUG_LOG
static void setup_debug_log(void);
#else
#define setup_debug_log()
#endif
void
ruby_set_debug_option(const char *str)
{
ruby_each_words(str, set_debug_option, 0);
setup_debug_log();
}
#if USE_RUBY_DEBUG_LOG
// RUBY_DEBUG_LOG features
// See vm_debug.h comments for details.
#define MAX_DEBUG_LOG 0x1000
#define MAX_DEBUG_LOG_MESSAGE_LEN 0x0200
#define MAX_DEBUG_LOG_FILTER_LEN 0x0020
#define MAX_DEBUG_LOG_FILTER_NUM 0x0010
enum ruby_debug_log_mode ruby_debug_log_mode;
struct debug_log_filter {
enum debug_log_filter_type {
dlf_all,
dlf_file, // "file:..."
dlf_func, // "func:..."
} type;
bool negative;
char str[MAX_DEBUG_LOG_FILTER_LEN];
};
static const char *dlf_type_names[] = {
"all",
"file",
"func",
};
#ifdef MAX_PATH
#define DEBUG_LOG_MAX_PATH (MAX_PATH-1)
#else
#define DEBUG_LOG_MAX_PATH 255
#endif
static struct {
char *mem;
unsigned int cnt;
struct debug_log_filter filters[MAX_DEBUG_LOG_FILTER_NUM];
unsigned int filters_num;
bool show_pid;
rb_nativethread_lock_t lock;
char output_file[DEBUG_LOG_MAX_PATH+1];
FILE *output;
} debug_log;
static char *
RUBY_DEBUG_LOG_MEM_ENTRY(unsigned int index)
{
return &debug_log.mem[MAX_DEBUG_LOG_MESSAGE_LEN * index];
}
static enum debug_log_filter_type
filter_type(const char *str, int *skiplen)
{
if (strncmp(str, "file:", 5) == 0) {
*skiplen = 5;
return dlf_file;
}
else if(strncmp(str, "func:", 5) == 0) {
*skiplen = 5;
return dlf_func;
}
else {
*skiplen = 0;
return dlf_all;
}
}
static void
setup_debug_log_filter(void)
{
const char *filter_config = getenv("RUBY_DEBUG_LOG_FILTER");
if (filter_config && strlen(filter_config) > 0) {
unsigned int i;
for (i=0; i<MAX_DEBUG_LOG_FILTER_NUM && filter_config; i++) {
size_t len;
const char *str = filter_config;
const char *p;
if ((p = strchr(str, ',')) == NULL) {
len = strlen(str);
filter_config = NULL;
}
else {
len = p - str - 1; // 1 is ','
filter_config = p + 1;
}
// positive/negative
if (*str == '-') {
debug_log.filters[i].negative = true;
str++;
}
else if (*str == '+') {
// negative is false on default.
str++;
}
// type
int skiplen;
debug_log.filters[i].type = filter_type(str, &skiplen);
len -= skiplen;
if (len >= MAX_DEBUG_LOG_FILTER_LEN) {
fprintf(stderr, "too long: %s (max:%d)\n", str, MAX_DEBUG_LOG_FILTER_LEN - 1);
exit(1);
}
// body
strncpy(debug_log.filters[i].str, str + skiplen, len);
debug_log.filters[i].str[len] = 0;
}
debug_log.filters_num = i;
for (i=0; i<debug_log.filters_num; i++) {
fprintf(stderr, "RUBY_DEBUG_LOG_FILTER[%d]=%s (%s%s)\n", i,
debug_log.filters[i].str,
debug_log.filters[i].negative ? "-" : "",
dlf_type_names[debug_log.filters[i].type]);
}
}
}
static void
setup_debug_log(void)
{
// check RUBY_DEBUG_LOG
const char *log_config = getenv("RUBY_DEBUG_LOG");
if (log_config && strlen(log_config) > 0) {
if (strcmp(log_config, "mem") == 0) {
debug_log.mem = (char *)malloc(MAX_DEBUG_LOG * MAX_DEBUG_LOG_MESSAGE_LEN);
if (debug_log.mem == NULL) {
fprintf(stderr, "setup_debug_log failed (can't allocate memory)\n");
exit(1);
}
ruby_debug_log_mode |= ruby_debug_log_memory;
}
else if (strcmp(log_config, "stderr") == 0) {
ruby_debug_log_mode |= ruby_debug_log_stderr;
}
else {
ruby_debug_log_mode |= ruby_debug_log_file;
// pid extension with %p
unsigned long len = strlen(log_config);
for (unsigned long i=0, j=0; i<len; i++) {
const char c = log_config[i];
if (c == '%') {
i++;
switch (log_config[i]) {
case '%':
debug_log.output_file[j++] = '%';
break;
case 'p':
snprintf(debug_log.output_file + j, DEBUG_LOG_MAX_PATH - j, "%d", getpid());
j = strlen(debug_log.output_file);
break;
default:
fprintf(stderr, "can not parse RUBY_DEBUG_LOG filename: %s\n", log_config);
exit(1);
}
}
else {
debug_log.output_file[j++] = c;
}
if (j >= DEBUG_LOG_MAX_PATH) {
fprintf(stderr, "RUBY_DEBUG_LOG=%s is too long\n", log_config);
exit(1);
}
}
if ((debug_log.output = fopen(debug_log.output_file, "w")) == NULL) {
fprintf(stderr, "can not open %s for RUBY_DEBUG_LOG\n", log_config);
exit(1);
}
setvbuf(debug_log.output, NULL, _IONBF, 0);
}
fprintf(stderr, "RUBY_DEBUG_LOG=%s %s%s%s\n", log_config,
(ruby_debug_log_mode & ruby_debug_log_memory) ? "[mem]" : "",
(ruby_debug_log_mode & ruby_debug_log_stderr) ? "[stderr]" : "",
(ruby_debug_log_mode & ruby_debug_log_file) ? "[file]" : "");
if (debug_log.output_file[0]) {
fprintf(stderr, "RUBY_DEBUG_LOG filename=%s\n", debug_log.output_file);
}
rb_nativethread_lock_initialize(&debug_log.lock);
setup_debug_log_filter();
if (getenv("RUBY_DEBUG_LOG_PID")) {
debug_log.show_pid = true;
}
}
}
static bool
check_filter(const char *str, const struct debug_log_filter *filter, bool *state)
{
if (filter->negative) {
if (strstr(str, filter->str) == NULL) {
*state = true;
return false;
}
else {
*state = false;
return true;
}
}
else {
if (strstr(str, filter->str) != NULL) {
*state = true;
return true;
}
else {
*state = false;
return false;
}
}
}
//
// RUBY_DEBUG_LOG_FILTER=-foo,-bar,baz,boo
// returns true if
// (func_name or file_name) doesn't contain foo
// and
// (func_name or file_name) doesn't contain bar
// and
// (func_name or file_name) contains baz or boo
//
// RUBY_DEBUG_LOG_FILTER=foo,bar,-baz,-boo
// returns true if
// (func_name or file_name) contains foo or bar
// or
// (func_name or file_name) doesn't contain baz and
// (func_name or file_name) doesn't contain boo and
//
// You can specify "file:" (ex file:foo) or "func:" (ex func:foo)
// prefixes to specify the filter for.
//
bool
ruby_debug_log_filter(const char *func_name, const char *file_name)
{
if (debug_log.filters_num > 0) {
bool state = false;
for (unsigned int i = 0; i<debug_log.filters_num; i++) {
const struct debug_log_filter *filter = &debug_log.filters[i];
switch (filter->type) {
case dlf_all:
if (check_filter(func_name, filter, &state)) return state;
if (check_filter(file_name, filter, &state)) return state;
break;
case dlf_func:
if (check_filter(func_name, filter, &state)) return state;
break;
case dlf_file:
if (check_filter(file_name, filter, &state)) return state;
break;
}
}
return state;
}
else {
return true;
}
}
static const char *
pretty_filename(const char *path)
{
// basename is one idea.
const char *s;
while ((s = strchr(path, '/')) != NULL) {
path = s+1;
}
return path;
}
#undef ruby_debug_log
void
ruby_debug_log(const char *file, int line, const char *func_name, const char *fmt, ...)
{
char buff[MAX_DEBUG_LOG_MESSAGE_LEN] = {0};
int len = 0;
int r = 0;
if (debug_log.show_pid) {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN, "pid:%d\t", getpid());
if (r < 0) rb_bug("ruby_debug_log returns %d", r);
len += r;
}
// message title
if (func_name && len < MAX_DEBUG_LOG_MESSAGE_LEN) {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN, "%s\t", func_name);
if (r < 0) rb_bug("ruby_debug_log returns %d", r);
len += r;
}
// message
if (fmt && len < MAX_DEBUG_LOG_MESSAGE_LEN) {
va_list args;
va_start(args, fmt);
r = vsnprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN - len, fmt, args);
va_end(args);
if (r < 0) rb_bug("ruby_debug_log vsnprintf() returns %d", r);
len += r;
}
// optional information
// C location
if (file && len < MAX_DEBUG_LOG_MESSAGE_LEN) {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN, "\t%s:%d", pretty_filename(file), line);
if (r < 0) rb_bug("ruby_debug_log returns %d", r);
len += r;
}
rb_execution_context_t *ec = rb_current_execution_context(false);
// Ruby location
int ruby_line;
const char *ruby_file = ec ? rb_source_location_cstr(&ruby_line) : NULL;
if (len < MAX_DEBUG_LOG_MESSAGE_LEN) {
if (ruby_file) {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN - len, "\t%s:%d", pretty_filename(ruby_file), ruby_line);
}
else {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN - len, "\t");
}
if (r < 0) rb_bug("ruby_debug_log returns %d", r);
len += r;
}
#ifdef RUBY_NT_SERIAL
// native thread information
if (len < MAX_DEBUG_LOG_MESSAGE_LEN) {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN - len, "\tnt:%d", ruby_nt_serial);
if (r < 0) rb_bug("ruby_debug_log returns %d", r);
len += r;
}
#endif
if (ec) {
rb_thread_t *th = ec ? rb_ec_thread_ptr(ec) : NULL;
// ractor information
if (ruby_single_main_ractor == NULL) {
rb_ractor_t *cr = th ? th->ractor : NULL;
rb_vm_t *vm = GET_VM();
if (r && len < MAX_DEBUG_LOG_MESSAGE_LEN) {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN - len, "\tr:#%d/%u (%u)",
cr ? (int)rb_ractor_id(cr) : -1, vm->ractor.cnt, vm->ractor.sched.running_cnt);
if (r < 0) rb_bug("ruby_debug_log returns %d", r);
len += r;
}
}
// thread information
if (th && r && len < MAX_DEBUG_LOG_MESSAGE_LEN) {
rb_execution_context_t *rec = th->ractor ? th->ractor->threads.running_ec : NULL;
const rb_thread_t *rth = rec ? rec->thread_ptr : NULL;
const rb_thread_t *sth = th->ractor ? th->ractor->threads.sched.running : NULL;
if (rth != th || sth != th) {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN - len, "\tth:%u (rth:%d,sth:%d)",
rb_th_serial(th), rth ? (int)rb_th_serial(rth) : -1, sth ? (int)rb_th_serial(sth) : -1);
}
else {
r = snprintf(buff + len, MAX_DEBUG_LOG_MESSAGE_LEN - len, "\tth:%u", rb_th_serial(th));
}
if (r < 0) rb_bug("ruby_debug_log returns %d", r);
len += r;
}
}
rb_nativethread_lock_lock(&debug_log.lock);
{
unsigned int cnt = debug_log.cnt++;
if (ruby_debug_log_mode & ruby_debug_log_memory) {
unsigned int index = cnt % MAX_DEBUG_LOG;
char *dst = RUBY_DEBUG_LOG_MEM_ENTRY(index);
strncpy(dst, buff, MAX_DEBUG_LOG_MESSAGE_LEN);
}
if (ruby_debug_log_mode & ruby_debug_log_stderr) {
fprintf(stderr, "%4u: %s\n", cnt, buff);
}
if (ruby_debug_log_mode & ruby_debug_log_file) {
fprintf(debug_log.output, "%u\t%s\n", cnt, buff);
}
}
rb_nativethread_lock_unlock(&debug_log.lock);
}
// for debugger
static void
debug_log_dump(FILE *out, unsigned int n)
{
if (ruby_debug_log_mode & ruby_debug_log_memory) {
unsigned int size = debug_log.cnt > MAX_DEBUG_LOG ? MAX_DEBUG_LOG : debug_log.cnt;
unsigned int current_index = debug_log.cnt % MAX_DEBUG_LOG;
if (n == 0) n = size;
if (n > size) n = size;
for (unsigned int i=0; i<n; i++) {
int index = current_index - size + i;
if (index < 0) index += MAX_DEBUG_LOG;
VM_ASSERT(index <= MAX_DEBUG_LOG);
const char *mesg = RUBY_DEBUG_LOG_MEM_ENTRY(index);;
fprintf(out, "%4u: %s\n", debug_log.cnt - size + i, mesg);
}
}
else {
fprintf(stderr, "RUBY_DEBUG_LOG=mem is not specified.");
}
}
// for debuggers
void
ruby_debug_log_print(unsigned int n)
{
debug_log_dump(stderr, n);
}
void
ruby_debug_log_dump(const char *fname, unsigned int n)
{
FILE *fp = fopen(fname, "w");
if (fp == NULL) {
fprintf(stderr, "can't open %s. give up.\n", fname);
}
else {
debug_log_dump(fp, n);
fclose(fp);
}
}
#endif // #if USE_RUBY_DEBUG_LOG
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