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vm_backtrace.c
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/**********************************************************************
vm_backtrace.c -
$Author: ko1 $
created at: Sun Jun 03 00:14:20 2012
Copyright (C) 1993-2012 Yukihiro Matsumoto
**********************************************************************/
#include "eval_intern.h"
#include "internal.h"
#include "internal/class.h"
#include "internal/error.h"
#include "internal/vm.h"
#include "iseq.h"
#include "ruby/debug.h"
#include "ruby/encoding.h"
#include "vm_core.h"
static VALUE rb_cBacktrace;
static VALUE rb_cBacktraceLocation;
static VALUE
id2str(ID id)
{
VALUE str = rb_id2str(id);
if (!str) return Qnil;
return str;
}
#define rb_id2str(id) id2str(id)
#define BACKTRACE_START 0
#define ALL_BACKTRACE_LINES -1
inline static int
calc_pos(const rb_iseq_t *iseq, const VALUE *pc, int *lineno, int *node_id)
{
VM_ASSERT(iseq);
if (pc == NULL) {
if (ISEQ_BODY(iseq)->type == ISEQ_TYPE_TOP) {
VM_ASSERT(! ISEQ_BODY(iseq)->local_table);
VM_ASSERT(! ISEQ_BODY(iseq)->local_table_size);
return 0;
}
if (lineno) *lineno = ISEQ_BODY(iseq)->location.first_lineno;
#ifdef USE_ISEQ_NODE_ID
if (node_id) *node_id = -1;
#endif
return 1;
}
else {
VM_ASSERT(ISEQ_BODY(iseq));
VM_ASSERT(ISEQ_BODY(iseq)->iseq_encoded);
VM_ASSERT(ISEQ_BODY(iseq)->iseq_size);
ptrdiff_t n = pc - ISEQ_BODY(iseq)->iseq_encoded;
VM_ASSERT(n >= 0);
#if SIZEOF_PTRDIFF_T > SIZEOF_INT
VM_ASSERT(n <= (ptrdiff_t)UINT_MAX);
#endif
VM_ASSERT((unsigned int)n <= ISEQ_BODY(iseq)->iseq_size);
ASSUME(n >= 0);
size_t pos = n; /* no overflow */
if (LIKELY(pos)) {
/* use pos-1 because PC points next instruction at the beginning of instruction */
pos--;
}
#if VMDEBUG && defined(HAVE_BUILTIN___BUILTIN_TRAP)
else {
/* SDR() is not possible; that causes infinite loop. */
rb_print_backtrace(stderr);
__builtin_trap();
}
#endif
if (lineno) *lineno = rb_iseq_line_no(iseq, pos);
#ifdef USE_ISEQ_NODE_ID
if (node_id) *node_id = rb_iseq_node_id(iseq, pos);
#endif
return 1;
}
}
inline static int
calc_lineno(const rb_iseq_t *iseq, const VALUE *pc)
{
int lineno;
if (calc_pos(iseq, pc, &lineno, NULL)) return lineno;
return 0;
}
#ifdef USE_ISEQ_NODE_ID
inline static int
calc_node_id(const rb_iseq_t *iseq, const VALUE *pc)
{
int node_id;
if (calc_pos(iseq, pc, NULL, &node_id)) return node_id;
return -1;
}
#endif
int
rb_vm_get_sourceline(const rb_control_frame_t *cfp)
{
if (VM_FRAME_RUBYFRAME_P(cfp) && cfp->iseq) {
const rb_iseq_t *iseq = cfp->iseq;
int line = calc_lineno(iseq, cfp->pc);
if (line != 0) {
return line;
}
else {
return ISEQ_BODY(iseq)->location.first_lineno;
}
}
else {
return 0;
}
}
typedef struct rb_backtrace_location_struct {
const rb_callable_method_entry_t *cme;
const rb_iseq_t *iseq;
const VALUE *pc;
} rb_backtrace_location_t;
struct valued_frame_info {
rb_backtrace_location_t *loc;
VALUE btobj;
};
static void
location_mark(void *ptr)
{
struct valued_frame_info *vfi = (struct valued_frame_info *)ptr;
rb_gc_mark(vfi->btobj);
}
static void
location_mark_entry(rb_backtrace_location_t *fi)
{
rb_gc_mark((VALUE)fi->cme);
if (fi->iseq) rb_gc_mark_movable((VALUE)fi->iseq);
}
static const rb_data_type_t location_data_type = {
"frame_info",
{
location_mark,
RUBY_TYPED_DEFAULT_FREE,
NULL, // No external memory to report,
},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | RUBY_TYPED_EMBEDDABLE
};
int
rb_frame_info_p(VALUE obj)
{
return rb_typeddata_is_kind_of(obj, &location_data_type);
}
static inline rb_backtrace_location_t *
location_ptr(VALUE locobj)
{
struct valued_frame_info *vloc;
TypedData_Get_Struct(locobj, struct valued_frame_info, &location_data_type, vloc);
return vloc->loc;
}
static int
location_lineno(rb_backtrace_location_t *loc)
{
if (loc->iseq) {
return calc_lineno(loc->iseq, loc->pc);
}
return 0;
}
/*
* Returns the line number of this frame.
*
* For example, using +caller_locations.rb+ from Thread::Backtrace::Location
*
* loc = c(0..1).first
* loc.lineno #=> 2
*/
static VALUE
location_lineno_m(VALUE self)
{
return INT2FIX(location_lineno(location_ptr(self)));
}
VALUE rb_mod_name0(VALUE klass, bool *permanent);
static VALUE
gen_method_name(VALUE owner, VALUE name)
{
bool permanent;
if (RB_TYPE_P(owner, T_CLASS) || RB_TYPE_P(owner, T_MODULE)) {
if (RCLASS_SINGLETON_P(owner)) {
VALUE v = RCLASS_ATTACHED_OBJECT(owner);
if (RB_TYPE_P(v, T_CLASS) || RB_TYPE_P(v, T_MODULE)) {
v = rb_mod_name0(v, &permanent);
if (permanent && !NIL_P(v)) {
return rb_sprintf("%"PRIsVALUE".%"PRIsVALUE, v, name);
}
}
}
else {
owner = rb_mod_name0(owner, &permanent);
if (permanent && !NIL_P(owner)) {
return rb_sprintf("%"PRIsVALUE"#%"PRIsVALUE, owner, name);
}
}
}
return name;
}
static VALUE
calculate_iseq_label(VALUE owner, const rb_iseq_t *iseq)
{
retry:
switch (ISEQ_BODY(iseq)->type) {
case ISEQ_TYPE_TOP:
case ISEQ_TYPE_CLASS:
case ISEQ_TYPE_MAIN:
return ISEQ_BODY(iseq)->location.label;
case ISEQ_TYPE_METHOD:
return gen_method_name(owner, ISEQ_BODY(iseq)->location.label);
case ISEQ_TYPE_BLOCK:
case ISEQ_TYPE_PLAIN: {
int level = 0;
const rb_iseq_t *orig_iseq = iseq;
if (ISEQ_BODY(orig_iseq)->parent_iseq != 0) {
while (ISEQ_BODY(orig_iseq)->local_iseq != iseq) {
if (ISEQ_BODY(iseq)->type == ISEQ_TYPE_BLOCK) {
level++;
}
iseq = ISEQ_BODY(iseq)->parent_iseq;
}
}
if (level <= 1) {
return rb_sprintf("block in %"PRIsVALUE, calculate_iseq_label(owner, iseq));
}
else {
return rb_sprintf("block (%d levels) in %"PRIsVALUE, level, calculate_iseq_label(owner, iseq));
}
}
case ISEQ_TYPE_RESCUE:
case ISEQ_TYPE_ENSURE:
case ISEQ_TYPE_EVAL:
iseq = ISEQ_BODY(iseq)->parent_iseq;
goto retry;
default:
rb_bug("calculate_iseq_label: unreachable");
}
}
static VALUE
location_label(rb_backtrace_location_t *loc)
{
if (loc->cme && loc->cme->def->type == VM_METHOD_TYPE_CFUNC) {
return gen_method_name(loc->cme->owner, rb_id2str(loc->cme->def->original_id));
}
else {
VALUE owner = Qnil;
if (loc->cme) {
owner = loc->cme->owner;
}
return calculate_iseq_label(owner, loc->iseq);
}
}
/*
* Returns the label of this frame.
*
* Usually consists of method, class, module, etc names with decoration.
*
* Consider the following example:
*
* def foo
* puts caller_locations(0).first.label
*
* 1.times do
* puts caller_locations(0).first.label
*
* 1.times do
* puts caller_locations(0).first.label
* end
*
* end
* end
*
* The result of calling +foo+ is this:
*
* label: foo
* label: block in foo
* label: block (2 levels) in foo
*
*/
static VALUE
location_label_m(VALUE self)
{
return location_label(location_ptr(self));
}
static VALUE
location_base_label(rb_backtrace_location_t *loc)
{
if (loc->cme && loc->cme->def->type == VM_METHOD_TYPE_CFUNC) {
return rb_id2str(loc->cme->def->original_id);
}
return ISEQ_BODY(loc->iseq)->location.base_label;
}
/*
* Returns the base label of this frame.
*
* Usually same as #label, without decoration.
*/
static VALUE
location_base_label_m(VALUE self)
{
return location_base_label(location_ptr(self));
}
static const rb_iseq_t *
location_iseq(rb_backtrace_location_t *loc)
{
return loc->iseq;
}
/*
* Returns the file name of this frame. This will generally be an absolute
* path, unless the frame is in the main script, in which case it will be the
* script location passed on the command line.
*
* For example, using +caller_locations.rb+ from Thread::Backtrace::Location
*
* loc = c(0..1).first
* loc.path #=> caller_locations.rb
*/
static VALUE
location_path_m(VALUE self)
{
const rb_iseq_t *iseq = location_iseq(location_ptr(self));
return iseq ? rb_iseq_path(iseq) : Qnil;
}
#ifdef USE_ISEQ_NODE_ID
static int
location_node_id(rb_backtrace_location_t *loc)
{
if (loc->iseq && loc->pc) {
return calc_node_id(loc->iseq, loc->pc);
}
return -1;
}
#endif
int
rb_get_node_id_from_frame_info(VALUE obj)
{
#ifdef USE_ISEQ_NODE_ID
rb_backtrace_location_t *loc = location_ptr(obj);
return location_node_id(loc);
#else
return -1;
#endif
}
const rb_iseq_t *
rb_get_iseq_from_frame_info(VALUE obj)
{
rb_backtrace_location_t *loc = location_ptr(obj);
const rb_iseq_t *iseq = location_iseq(loc);
return iseq;
}
static VALUE
location_realpath(rb_backtrace_location_t *loc)
{
if (loc->iseq) {
return rb_iseq_realpath(loc->iseq);
}
return Qnil;
}
/*
* Returns the full file path of this frame.
*
* Same as #path, except that it will return absolute path
* even if the frame is in the main script.
*/
static VALUE
location_absolute_path_m(VALUE self)
{
return location_realpath(location_ptr(self));
}
static VALUE
location_format(VALUE file, int lineno, VALUE name)
{
VALUE s = rb_enc_sprintf(rb_enc_compatible(file, name), "%s", RSTRING_PTR(file));
if (lineno != 0) {
rb_str_catf(s, ":%d", lineno);
}
rb_str_cat_cstr(s, ":in ");
if (NIL_P(name)) {
rb_str_cat_cstr(s, "unknown method");
}
else {
rb_str_catf(s, "'%s'", RSTRING_PTR(name));
}
return s;
}
static VALUE
location_to_str(rb_backtrace_location_t *loc)
{
VALUE file, owner = Qnil, name;
int lineno;
if (loc->cme && loc->cme->def->type == VM_METHOD_TYPE_CFUNC) {
if (loc->iseq && loc->pc) {
file = rb_iseq_path(loc->iseq);
lineno = calc_lineno(loc->iseq, loc->pc);
}
else {
file = GET_VM()->progname;
lineno = 0;
}
name = gen_method_name(loc->cme->owner, rb_id2str(loc->cme->def->original_id));
}
else {
file = rb_iseq_path(loc->iseq);
lineno = calc_lineno(loc->iseq, loc->pc);
if (loc->cme) {
owner = loc->cme->owner;
}
name = calculate_iseq_label(owner, loc->iseq);
}
return location_format(file, lineno, name);
}
/*
* Returns a Kernel#caller style string representing this frame.
*/
static VALUE
location_to_str_m(VALUE self)
{
return location_to_str(location_ptr(self));
}
/*
* Returns the same as calling +inspect+ on the string representation of
* #to_str
*/
static VALUE
location_inspect_m(VALUE self)
{
return rb_str_inspect(location_to_str(location_ptr(self)));
}
typedef struct rb_backtrace_struct {
int backtrace_size;
VALUE strary;
VALUE locary;
rb_backtrace_location_t backtrace[1];
} rb_backtrace_t;
static void
backtrace_mark(void *ptr)
{
rb_backtrace_t *bt = (rb_backtrace_t *)ptr;
size_t i, s = bt->backtrace_size;
for (i=0; i<s; i++) {
location_mark_entry(&bt->backtrace[i]);
}
rb_gc_mark_movable(bt->strary);
rb_gc_mark_movable(bt->locary);
}
static void
location_update_entry(rb_backtrace_location_t *fi)
{
fi->cme = (rb_callable_method_entry_t *)rb_gc_location((VALUE)fi->cme);
if (fi->iseq) {
fi->iseq = (rb_iseq_t *)rb_gc_location((VALUE)fi->iseq);
}
}
static void
backtrace_update(void *ptr)
{
rb_backtrace_t *bt = (rb_backtrace_t *)ptr;
size_t i, s = bt->backtrace_size;
for (i=0; i<s; i++) {
location_update_entry(&bt->backtrace[i]);
}
bt->strary = rb_gc_location(bt->strary);
bt->locary = rb_gc_location(bt->locary);
}
static const rb_data_type_t backtrace_data_type = {
"backtrace",
{
backtrace_mark,
RUBY_DEFAULT_FREE,
NULL, // No external memory to report,
backtrace_update,
},
0, 0, RUBY_TYPED_FREE_IMMEDIATELY | RUBY_TYPED_WB_PROTECTED | RUBY_TYPED_EMBEDDABLE
};
int
rb_backtrace_p(VALUE obj)
{
return rb_typeddata_is_kind_of(obj, &backtrace_data_type);
}
static VALUE
backtrace_alloc(VALUE klass)
{
rb_backtrace_t *bt;
VALUE obj = TypedData_Make_Struct(klass, rb_backtrace_t, &backtrace_data_type, bt);
return obj;
}
static long
backtrace_size(const rb_execution_context_t *ec)
{
const rb_control_frame_t *last_cfp = ec->cfp;
const rb_control_frame_t *start_cfp = RUBY_VM_END_CONTROL_FRAME(ec);
if (start_cfp == NULL) {
return -1;
}
start_cfp =
RUBY_VM_NEXT_CONTROL_FRAME(
RUBY_VM_NEXT_CONTROL_FRAME(start_cfp)); /* skip top frames */
if (start_cfp < last_cfp) {
return 0;
}
return start_cfp - last_cfp + 1;
}
static bool
is_internal_location(const rb_control_frame_t *cfp)
{
static const char prefix[] = "<internal:";
const size_t prefix_len = sizeof(prefix) - 1;
VALUE file = rb_iseq_path(cfp->iseq);
return strncmp(prefix, RSTRING_PTR(file), prefix_len) == 0;
}
static void
bt_update_cfunc_loc(unsigned long cfunc_counter, rb_backtrace_location_t *cfunc_loc, const rb_iseq_t *iseq, const VALUE *pc)
{
for (; cfunc_counter > 0; cfunc_counter--, cfunc_loc--) {
cfunc_loc->iseq = iseq;
cfunc_loc->pc = pc;
}
}
static VALUE location_create(rb_backtrace_location_t *srcloc, void *btobj);
static void
bt_yield_loc(rb_backtrace_location_t *loc, long num_frames, VALUE btobj)
{
for (; num_frames > 0; num_frames--, loc++) {
rb_yield(location_create(loc, (void *)btobj));
}
}
static VALUE
rb_ec_partial_backtrace_object(const rb_execution_context_t *ec, long start_frame, long num_frames, int* start_too_large, bool skip_internal, bool do_yield)
{
const rb_control_frame_t *cfp = ec->cfp;
const rb_control_frame_t *end_cfp = RUBY_VM_END_CONTROL_FRAME(ec);
ptrdiff_t size;
rb_backtrace_t *bt = NULL;
VALUE btobj = Qnil;
rb_backtrace_location_t *loc = NULL;
unsigned long cfunc_counter = 0;
// In the case the thread vm_stack or cfp is not initialized, there is no backtrace.
if (end_cfp == NULL) {
num_frames = 0;
}
else {
end_cfp = RUBY_VM_NEXT_CONTROL_FRAME(end_cfp);
/*
* top frame (dummy) <- RUBY_VM_END_CONTROL_FRAME
* top frame (dummy) <- end_cfp
* top frame <- main script
* top frame
* ...
* 2nd frame <- lev:0
* current frame <- ec->cfp
*/
size = end_cfp - cfp + 1;
if (size < 0) {
num_frames = 0;
}
else if (num_frames < 0 || num_frames > size) {
num_frames = size;
}
}
size_t memsize = offsetof(rb_backtrace_t, backtrace) + num_frames * sizeof(rb_backtrace_location_t);
btobj = rb_data_typed_object_zalloc(rb_cBacktrace, memsize, &backtrace_data_type);
TypedData_Get_Struct(btobj, rb_backtrace_t, &backtrace_data_type, bt);
bt->backtrace_size = 0;
if (num_frames == 0) {
if (start_too_large) *start_too_large = 0;
return btobj;
}
for (; cfp != end_cfp && (bt->backtrace_size < num_frames); cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp)) {
if (cfp->iseq) {
if (cfp->pc) {
if (start_frame > 0) {
start_frame--;
}
else if (!skip_internal || !is_internal_location(cfp)) {
const rb_iseq_t *iseq = cfp->iseq;
const VALUE *pc = cfp->pc;
loc = &bt->backtrace[bt->backtrace_size++];
RB_OBJ_WRITE(btobj, &loc->cme, rb_vm_frame_method_entry(cfp));
RB_OBJ_WRITE(btobj, &loc->iseq, iseq);
loc->pc = pc;
bt_update_cfunc_loc(cfunc_counter, loc-1, iseq, pc);
if (do_yield) {
bt_yield_loc(loc - cfunc_counter, cfunc_counter+1, btobj);
}
cfunc_counter = 0;
}
}
}
else {
VM_ASSERT(RUBYVM_CFUNC_FRAME_P(cfp));
if (start_frame > 0) {
start_frame--;
}
else {
loc = &bt->backtrace[bt->backtrace_size++];
RB_OBJ_WRITE(btobj, &loc->cme, rb_vm_frame_method_entry(cfp));
loc->iseq = NULL;
loc->pc = NULL;
cfunc_counter++;
}
}
}
if (cfunc_counter > 0) {
for (; cfp != end_cfp; cfp = RUBY_VM_PREVIOUS_CONTROL_FRAME(cfp)) {
if (cfp->iseq && cfp->pc && (!skip_internal || !is_internal_location(cfp))) {
bt_update_cfunc_loc(cfunc_counter, loc, cfp->iseq, cfp->pc);
RB_OBJ_WRITTEN(btobj, Qundef, cfp->iseq);
if (do_yield) {
bt_yield_loc(loc - cfunc_counter, cfunc_counter, btobj);
}
break;
}
}
}
if (start_too_large) *start_too_large = (start_frame > 0 ? -1 : 0);
return btobj;
}
VALUE
rb_ec_backtrace_object(const rb_execution_context_t *ec)
{
return rb_ec_partial_backtrace_object(ec, BACKTRACE_START, ALL_BACKTRACE_LINES, NULL, FALSE, FALSE);
}
static VALUE
backtrace_collect(rb_backtrace_t *bt, VALUE (*func)(rb_backtrace_location_t *, void *arg), void *arg)
{
VALUE btary;
int i;
btary = rb_ary_new2(bt->backtrace_size);
for (i=0; i<bt->backtrace_size; i++) {
rb_backtrace_location_t *loc = &bt->backtrace[i];
rb_ary_push(btary, func(loc, arg));
}
return btary;
}
static VALUE
location_to_str_dmyarg(rb_backtrace_location_t *loc, void *dmy)
{
return location_to_str(loc);
}
static VALUE
backtrace_to_str_ary(VALUE self)
{
VALUE r;
rb_backtrace_t *bt;
TypedData_Get_Struct(self, rb_backtrace_t, &backtrace_data_type, bt);
r = backtrace_collect(bt, location_to_str_dmyarg, 0);
RB_GC_GUARD(self);
return r;
}
VALUE
rb_backtrace_to_str_ary(VALUE self)
{
rb_backtrace_t *bt;
TypedData_Get_Struct(self, rb_backtrace_t, &backtrace_data_type, bt);
if (!bt->strary) {
RB_OBJ_WRITE(self, &bt->strary, backtrace_to_str_ary(self));
}
return bt->strary;
}
void
rb_backtrace_use_iseq_first_lineno_for_last_location(VALUE self)
{
rb_backtrace_t *bt;
rb_backtrace_location_t *loc;
TypedData_Get_Struct(self, rb_backtrace_t, &backtrace_data_type, bt);
VM_ASSERT(bt->backtrace_size > 0);
loc = &bt->backtrace[0];
VM_ASSERT(!loc->cme || loc->cme->def->type == VM_METHOD_TYPE_ISEQ);
loc->pc = NULL; // means location.first_lineno
}
static VALUE
location_create(rb_backtrace_location_t *srcloc, void *btobj)
{
VALUE obj;
struct valued_frame_info *vloc;
obj = TypedData_Make_Struct(rb_cBacktraceLocation, struct valued_frame_info, &location_data_type, vloc);
vloc->loc = srcloc;
RB_OBJ_WRITE(obj, &vloc->btobj, (VALUE)btobj);
return obj;
}
static VALUE
backtrace_to_location_ary(VALUE self)
{
VALUE r;
rb_backtrace_t *bt;
TypedData_Get_Struct(self, rb_backtrace_t, &backtrace_data_type, bt);
r = backtrace_collect(bt, location_create, (void *)self);
RB_GC_GUARD(self);
return r;
}
VALUE
rb_backtrace_to_location_ary(VALUE self)
{
rb_backtrace_t *bt;
TypedData_Get_Struct(self, rb_backtrace_t, &backtrace_data_type, bt);
if (!bt->locary) {
RB_OBJ_WRITE(self, &bt->locary, backtrace_to_location_ary(self));
}
return bt->locary;
}
static VALUE
backtrace_dump_data(VALUE self)
{
VALUE str = rb_backtrace_to_str_ary(self);
return str;
}
static VALUE
backtrace_load_data(VALUE self, VALUE str)
{
rb_backtrace_t *bt;
TypedData_Get_Struct(self, rb_backtrace_t, &backtrace_data_type, bt);
RB_OBJ_WRITE(self, &bt->strary, str);
return self;
}
/*
* call-seq: Thread::Backtrace::limit -> integer
*
* Returns maximum backtrace length set by <tt>--backtrace-limit</tt>
* command-line option. The default is <tt>-1</tt> which means unlimited
* backtraces. If the value is zero or positive, the error backtraces,
* produced by Exception#full_message, are abbreviated and the extra lines
* are replaced by <tt>... 3 levels... </tt>
*
* $ ruby -r net/http -e "p Thread::Backtrace.limit; Net::HTTP.get(URI('http://wrong.address'))"
* - 1
* .../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': Failed to open TCP connection to wrong.address:80 (getaddrinfo: Name or service not known) (SocketError)
* from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
* from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
* from .../lib/ruby/3.1.0/net/http.rb:998:in `connect'
* from .../lib/ruby/3.1.0/net/http.rb:976:in `do_start'
* from .../lib/ruby/3.1.0/net/http.rb:965:in `start'
* from .../lib/ruby/3.1.0/net/http.rb:627:in `start'
* from .../lib/ruby/3.1.0/net/http.rb:503:in `get_response'
* from .../lib/ruby/3.1.0/net/http.rb:474:in `get'
* .../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError)
* from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
* from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
* from .../lib/ruby/3.1.0/net/http.rb:998:in `connect'
* from .../lib/ruby/3.1.0/net/http.rb:976:in `do_start'
* from .../lib/ruby/3.1.0/net/http.rb:965:in `start'
* from .../lib/ruby/3.1.0/net/http.rb:627:in `start'
* from .../lib/ruby/3.1.0/net/http.rb:503:in `get_response'
* from .../lib/ruby/3.1.0/net/http.rb:474:in `get'
* from -e:1:in `<main>'
*
* $ ruby --backtrace-limit 2 -r net/http -e "p Thread::Backtrace.limit; Net::HTTP.get(URI('http://wrong.address'))"
* 2
* .../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': Failed to open TCP connection to wrong.address:80 (getaddrinfo: Name or service not known) (SocketError)
* from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
* from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
* ... 7 levels...
* .../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError)
* from .../lib/ruby/3.1.0/socket.rb:227:in `foreach'
* from .../lib/ruby/3.1.0/socket.rb:632:in `tcp'
* ... 7 levels...
*
* $ ruby --backtrace-limit 0 -r net/http -e "p Thread::Backtrace.limit; Net::HTTP.get(URI('http://wrong.address'))"
* 0
* .../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': Failed to open TCP connection to wrong.address:80 (getaddrinfo: Name or service not known) (SocketError)
* ... 9 levels...
* .../lib/ruby/3.1.0/socket.rb:227:in `getaddrinfo': getaddrinfo: Name or service not known (SocketError)
* ... 9 levels...
*
*/
static VALUE
backtrace_limit(VALUE self)
{
return LONG2NUM(rb_backtrace_length_limit);
}
VALUE
rb_ec_backtrace_str_ary(const rb_execution_context_t *ec, long lev, long n)
{
return rb_backtrace_to_str_ary(rb_ec_partial_backtrace_object(ec, lev, n, NULL, FALSE, FALSE));
}
VALUE
rb_ec_backtrace_location_ary(const rb_execution_context_t *ec, long lev, long n, bool skip_internal)
{
return rb_backtrace_to_location_ary(rb_ec_partial_backtrace_object(ec, lev, n, NULL, skip_internal, FALSE));
}
/* make old style backtrace directly */
static void
backtrace_each(const rb_execution_context_t *ec,
void (*init)(void *arg, size_t size),
void (*iter_iseq)(void *arg, const rb_control_frame_t *cfp),
void (*iter_cfunc)(void *arg, const rb_control_frame_t *cfp, ID mid),
void *arg)
{
const rb_control_frame_t *last_cfp = ec->cfp;
const rb_control_frame_t *start_cfp = RUBY_VM_END_CONTROL_FRAME(ec);
const rb_control_frame_t *cfp;
ptrdiff_t size, i;
// In the case the thread vm_stack or cfp is not initialized, there is no backtrace.
if (start_cfp == NULL) {
init(arg, 0);
return;
}
/* <- start_cfp (end control frame)
* top frame (dummy)
* top frame (dummy)
* top frame <- start_cfp
* top frame
* ...
* 2nd frame <- lev:0
* current frame <- ec->cfp
*/
start_cfp =
RUBY_VM_NEXT_CONTROL_FRAME(
RUBY_VM_NEXT_CONTROL_FRAME(start_cfp)); /* skip top frames */
if (start_cfp < last_cfp) {
size = 0;
}
else {
size = start_cfp - last_cfp + 1;
}
init(arg, size);
/* SDR(); */
for (i=0, cfp = start_cfp; i<size; i++, cfp = RUBY_VM_NEXT_CONTROL_FRAME(cfp)) {
/* fprintf(stderr, "cfp: %d\n", (rb_control_frame_t *)(ec->vm_stack + ec->vm_stack_size) - cfp); */
if (cfp->iseq) {
if (cfp->pc) {
iter_iseq(arg, cfp);
}
}
else {
VM_ASSERT(RUBYVM_CFUNC_FRAME_P(cfp));
const rb_callable_method_entry_t *me = rb_vm_frame_method_entry(cfp);
ID mid = me->def->original_id;
iter_cfunc(arg, cfp, mid);
}
}
}
struct oldbt_arg {
VALUE filename;
int lineno;
void (*func)(void *data, VALUE file, int lineno, VALUE name);
void *data; /* result */
};
static void
oldbt_init(void *ptr, size_t dmy)
{
struct oldbt_arg *arg = (struct oldbt_arg *)ptr;
arg->filename = GET_VM()->progname;
arg->lineno = 0;
}
static void
oldbt_iter_iseq(void *ptr, const rb_control_frame_t *cfp)
{
const rb_iseq_t *iseq = cfp->iseq;
const VALUE *pc = cfp->pc;
struct oldbt_arg *arg = (struct oldbt_arg *)ptr;
VALUE file = arg->filename = rb_iseq_path(iseq);
VALUE name = ISEQ_BODY(iseq)->location.label;
int lineno = arg->lineno = calc_lineno(iseq, pc);
(arg->func)(arg->data, file, lineno, name);
}
static void
oldbt_iter_cfunc(void *ptr, const rb_control_frame_t *cfp, ID mid)
{
struct oldbt_arg *arg = (struct oldbt_arg *)ptr;
VALUE file = arg->filename;
VALUE name = rb_id2str(mid);
int lineno = arg->lineno;
(arg->func)(arg->data, file, lineno, name);
}
static void
oldbt_print(void *data, VALUE file, int lineno, VALUE name)
{
FILE *fp = (FILE *)data;
if (NIL_P(name)) {
fprintf(fp, "\tfrom %s:%d:in unknown method\n",
RSTRING_PTR(file), lineno);
}
else {
fprintf(fp, "\tfrom %s:%d:in '%s'\n",
RSTRING_PTR(file), lineno, RSTRING_PTR(name));
}
}
static void
vm_backtrace_print(FILE *fp)
{
struct oldbt_arg arg;
arg.func = oldbt_print;
arg.data = (void *)fp;
backtrace_each(GET_EC(),
oldbt_init,
oldbt_iter_iseq,
oldbt_iter_cfunc,
&arg);
}
struct oldbt_bugreport_arg {
FILE *fp;