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rp_method.c
552 lines (451 loc) · 17.3 KB
/
rp_method.c
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/* Copyright (C) 2005-2019 Shugo Maeda <shugo@ruby-lang.org> and Charlie Savage <cfis@savagexi.com>
Please see the LICENSE file for copyright and distribution information */
#include "rp_allocation.h"
#include "rp_call_trees.h"
#include "rp_method.h"
#include "rp_profile.h"
VALUE cRpMethodInfo;
/* ================ Helper Functions =================*/
VALUE resolve_klass(VALUE klass, unsigned int* klass_flags)
{
VALUE result = klass;
if (klass == 0 || klass == Qnil)
{
result = Qnil;
}
else if (BUILTIN_TYPE(klass) == T_CLASS && FL_TEST(klass, FL_SINGLETON))
{
/* We have come across a singleton object. First
figure out what it is attached to.*/
VALUE attached = rb_iv_get(klass, "__attached__");
switch (BUILTIN_TYPE(attached))
{
/* Is this a singleton class acting as a metaclass? */
case T_CLASS:
{
*klass_flags |= kClassSingleton;
result = attached;
break;
}
/* Is this for singleton methods on a module? */
case T_MODULE:
{
*klass_flags |= kModuleSingleton;
result = attached;
break;
}
/* Is this for singleton methods on an object? */
case T_OBJECT:
{
*klass_flags |= kObjectSingleton;
result = rb_class_superclass(klass);
break;
}
/* Ok, this could be other things like an array put onto
a singleton object (yeah, it happens, see the singleton
objects test case). */
default:
{
*klass_flags |= kOtherSingleton;
result = klass;
break;
}
}
}
/* Is this an include for a module? If so get the actual
module class since we want to combine all profiling
results for that module. */
else if (BUILTIN_TYPE(klass) == T_ICLASS)
{
unsigned int dummy;
*klass_flags |= kModuleIncludee;
result = resolve_klass(RBASIC_CLASS(klass), &dummy);
}
return result;
}
VALUE resolve_klass_name(VALUE klass, unsigned int* klass_flags)
{
VALUE result = Qnil;
if (klass == Qnil)
{
result = rb_str_new2("[global]");
}
else if (*klass_flags & kOtherSingleton)
{
result = rb_any_to_s(klass);
}
else
{
result = rb_class_name(klass);
}
return result;
}
st_data_t method_key(VALUE klass, VALUE msym)
{
VALUE resolved_klass = klass;
/* Is this an include for a module? If so get the actual
module class since we want to combine all profiling
results for that module. */
if (klass == 0 || klass == Qnil)
{
resolved_klass = Qnil;
}
else if (BUILTIN_TYPE(klass) == T_ICLASS)
{
resolved_klass = RBASIC_CLASS(klass);
}
st_data_t hash = rb_hash_start(0);
hash = rb_hash_uint(hash, resolved_klass);
hash = rb_hash_uint(hash, msym);
hash = rb_hash_end(hash);
return hash;
}
/* ================ prof_method_t =================*/
prof_method_t* prof_get_method(VALUE self)
{
/* Can't use Data_Get_Struct because that triggers the event hook
ending up in endless recursion. */
prof_method_t* result = RTYPEDDATA_DATA(self);
if (!result)
rb_raise(rb_eRuntimeError, "This RubyProf::MethodInfo instance has already been freed, likely because its profile has been freed.");
return result;
}
prof_method_t* prof_method_create(struct prof_profile_t* profile, VALUE klass, VALUE msym, VALUE source_file, int source_line)
{
prof_method_t* result = ALLOC(prof_method_t);
result->profile = profile;
result->key = method_key(klass, msym);
result->klass_flags = 0;
/* Note we do not call resolve_klass_name now because that causes an object allocation that shows up
in the allocation results so we want to avoid it until after the profile run is complete. */
result->klass = resolve_klass(klass, &result->klass_flags);
result->klass_name = Qnil;
result->method_name = msym;
result->measurement = prof_measurement_create();
result->call_trees = prof_call_trees_create();
result->allocations_table = prof_allocations_create();
result->visits = 0;
result->recursive = false;
result->object = Qnil;
result->source_file = source_file;
result->source_line = source_line;
return result;
}
prof_method_t* prof_method_copy(prof_method_t* other)
{
prof_method_t* result = prof_method_create(other->profile, other->klass, other->method_name, other->source_file, other->source_line);
result->measurement = prof_measurement_copy(other->measurement);
return result;
}
/* The underlying c structures are freed when the parent profile is freed.
However, on shutdown the Ruby GC frees objects in any will-nilly order.
That means the ruby thread object wrapping the c thread struct may
be freed before the parent profile. Thus we add in a free function
for the garbage collector so that if it does get called will nil
out our Ruby object reference.*/
static void prof_method_ruby_gc_free(void* data)
{
if (data)
{
prof_method_t* method = (prof_method_t*)data;
method->object = Qnil;
}
}
static void prof_method_free(prof_method_t* method)
{
/* Has this method object been accessed by Ruby? If
yes clean it up so to avoid a segmentation fault. */
if (method->object != Qnil)
{
RTYPEDDATA(method->object)->data = NULL;
method->object = Qnil;
}
prof_allocations_free(method->allocations_table);
prof_call_trees_free(method->call_trees);
prof_measurement_free(method->measurement);
xfree(method);
}
size_t prof_method_size(const void* data)
{
return sizeof(prof_method_t);
}
void prof_method_mark(void* data)
{
if (!data) return;
prof_method_t* method = (prof_method_t*)data;
if (method->object != Qnil)
rb_gc_mark_movable(method->object);
// Mark the profile to keep it alive. Can't call prof_profile_mark because that would
// cause recursion
if (method->profile && method->profile->object != Qnil)
rb_gc_mark(method->profile->object);
rb_gc_mark(method->klass_name);
rb_gc_mark(method->method_name);
rb_gc_mark(method->source_file);
if (method->klass != Qnil)
rb_gc_mark(method->klass);
prof_measurement_mark(method->measurement);
prof_allocations_mark(method->allocations_table);
}
void prof_method_compact(void* data)
{
prof_method_t* method = (prof_method_t*)data;
method->object = rb_gc_location(method->object);
method->klass_name = rb_gc_location(method->klass_name);
method->method_name = rb_gc_location(method->method_name);
}
static VALUE prof_method_allocate(VALUE klass)
{
prof_method_t* method_data = prof_method_create(NULL, Qnil, Qnil, Qnil, 0);
method_data->object = prof_method_wrap(method_data);
return method_data->object;
}
static const rb_data_type_t method_info_type =
{
.wrap_struct_name = "MethodInfo",
.function =
{
.dmark = prof_method_mark,
.dfree = prof_method_ruby_gc_free,
.dsize = prof_method_size,
.dcompact = prof_method_compact
},
.data = NULL,
.flags = RUBY_TYPED_FREE_IMMEDIATELY
};
VALUE prof_method_wrap(prof_method_t* method)
{
if (method->object == Qnil)
{
method->object = TypedData_Wrap_Struct(cRpMethodInfo, &method_info_type, method);
}
return method->object;
}
st_table* method_table_create()
{
return rb_st_init_numtable();
}
static int method_table_free_iterator(st_data_t key, st_data_t value, st_data_t dummy)
{
prof_method_free((prof_method_t*)value);
return ST_CONTINUE;
}
void method_table_free(st_table* table)
{
rb_st_foreach(table, method_table_free_iterator, 0);
rb_st_free_table(table);
}
size_t method_table_insert(st_table* table, st_data_t key, prof_method_t* val)
{
return rb_st_insert(table, (st_data_t)key, (st_data_t)val);
}
static int prof_method_table_merge_internal(st_data_t key, st_data_t value, st_data_t data)
{
st_table* self_table = (st_table*)data;
prof_method_t* other_child = (prof_method_t*)value;
prof_method_t* self_child = method_table_lookup(self_table, other_child->key);
if (self_child)
{
prof_measurement_merge_internal(self_child->measurement, other_child->measurement);
}
else
{
prof_method_t* copy = prof_method_copy(other_child);
method_table_insert(self_table, copy->key, copy);
}
return ST_CONTINUE;
}
void prof_method_table_merge(st_table* self, st_table* other)
{
rb_st_foreach(other, prof_method_table_merge_internal, (st_data_t)self);
}
prof_method_t* method_table_lookup(st_table* table, st_data_t key)
{
st_data_t val;
if (rb_st_lookup(table, (st_data_t)key, &val))
{
return (prof_method_t*)val;
}
else
{
return NULL;
}
}
/* ================ Method Info =================*/
/* Document-class: RubyProf::MethodInfo
The RubyProf::MethodInfo class stores profiling data for a method.
One instance of the RubyProf::MethodInfo class is created per method
called per thread. Thus, if a method is called in two different
thread then there will be two RubyProf::MethodInfo objects
created. RubyProf::MethodInfo objects can be accessed via
the RubyProf::Profile object.
*/
/* call-seq:
new(klass, method_name) -> method_info
Creates a new MethodInfo instance. +Klass+ should be a reference to
a Ruby class and +method_name+ a symbol identifying one of its instance methods.*/
static VALUE prof_method_initialize(VALUE self, VALUE klass, VALUE method_name)
{
prof_method_t* method_ptr = prof_get_method(self);
method_ptr->klass = klass;
method_ptr->method_name = method_name;
// Setup method key
method_ptr->key = method_key(klass, method_name);
// Get method object
VALUE ruby_method = rb_funcall(klass, rb_intern("instance_method"), 1, method_name);
// Get source file and line number
VALUE location_array = rb_funcall(ruby_method, rb_intern("source_location"), 0);
if (location_array != Qnil && RARRAY_LEN(location_array) == 2)
{
method_ptr->source_file = rb_ary_entry(location_array, 0);
method_ptr->source_line = NUM2INT(rb_ary_entry(location_array, 1));
}
return self;
}
/* call-seq:
hash -> hash
Returns the hash key for this method info. The hash key is calculated based on the
klass name and method name */
static VALUE prof_method_hash(VALUE self)
{
prof_method_t* method_ptr = prof_get_method(self);
return ULL2NUM(method_ptr->key);
}
/* call-seq:
allocations -> array
Returns an array of allocation information.*/
static VALUE prof_method_allocations(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return prof_allocations_wrap(method->allocations_table);
}
/* call-seq:
called -> Measurement
Returns the measurement associated with this method. */
static VALUE prof_method_measurement(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return prof_measurement_wrap(method->measurement);
}
/* call-seq:
source_file => string
Returns the source file of the method
*/
static VALUE prof_method_source_file(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return method->source_file;
}
/* call-seq:
line_no -> int
returns the line number of the method */
static VALUE prof_method_line(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return INT2FIX(method->source_line);
}
/* call-seq:
klass_name -> String
Returns the name of this method's class. Singleton classes
will have the form <Object::Object>. */
static VALUE prof_method_klass_name(VALUE self)
{
prof_method_t* method = prof_get_method(self);
if (method->klass_name == Qnil)
method->klass_name = resolve_klass_name(method->klass, &method->klass_flags);
return method->klass_name;
}
/* call-seq:
klass_flags -> integer
Returns the klass flags */
static VALUE prof_method_klass_flags(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return INT2FIX(method->klass_flags);
}
/* call-seq:
method_name -> Symbol
Returns the name of this method in the format Object#method. Singletons
methods will be returned in the format <Object::Object>#method.*/
static VALUE prof_method_name(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return method->method_name;
}
/* call-seq:
recursive? -> boolean
Returns the true if this method is recursively invoked */
static VALUE prof_method_recursive(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return method->recursive ? Qtrue : Qfalse;
}
/* call-seq:
call_trees -> CallTrees
Returns the CallTrees associated with this method. */
static VALUE prof_method_call_trees(VALUE self)
{
prof_method_t* method = prof_get_method(self);
return prof_call_trees_wrap(method->call_trees);
}
/* :nodoc: */
static VALUE prof_method_dump(VALUE self)
{
prof_method_t* method_data = prof_get_method(self);
VALUE result = rb_hash_new();
rb_hash_aset(result, ID2SYM(rb_intern("klass_name")), prof_method_klass_name(self));
rb_hash_aset(result, ID2SYM(rb_intern("klass_flags")), INT2FIX(method_data->klass_flags));
rb_hash_aset(result, ID2SYM(rb_intern("method_name")), method_data->method_name);
rb_hash_aset(result, ID2SYM(rb_intern("key")), ULL2NUM(method_data->key));
rb_hash_aset(result, ID2SYM(rb_intern("recursive")), prof_method_recursive(self));
rb_hash_aset(result, ID2SYM(rb_intern("source_file")), method_data->source_file);
rb_hash_aset(result, ID2SYM(rb_intern("source_line")), INT2FIX(method_data->source_line));
rb_hash_aset(result, ID2SYM(rb_intern("call_trees")), prof_call_trees_wrap(method_data->call_trees));
rb_hash_aset(result, ID2SYM(rb_intern("measurement")), prof_measurement_wrap(method_data->measurement));
rb_hash_aset(result, ID2SYM(rb_intern("allocations")), prof_method_allocations(self));
return result;
}
/* :nodoc: */
static VALUE prof_method_load(VALUE self, VALUE data)
{
prof_method_t* method_data = prof_get_method(self);
method_data->object = self;
method_data->klass_name = rb_hash_aref(data, ID2SYM(rb_intern("klass_name")));
method_data->klass_flags = FIX2INT(rb_hash_aref(data, ID2SYM(rb_intern("klass_flags"))));
method_data->method_name = rb_hash_aref(data, ID2SYM(rb_intern("method_name")));
method_data->key = RB_NUM2ULL(rb_hash_aref(data, ID2SYM(rb_intern("key"))));
method_data->recursive = rb_hash_aref(data, ID2SYM(rb_intern("recursive"))) == Qtrue ? true : false;
method_data->source_file = rb_hash_aref(data, ID2SYM(rb_intern("source_file")));
method_data->source_line = FIX2INT(rb_hash_aref(data, ID2SYM(rb_intern("source_line"))));
VALUE call_trees = rb_hash_aref(data, ID2SYM(rb_intern("call_trees")));
method_data->call_trees = prof_get_call_trees(call_trees);
VALUE measurement = rb_hash_aref(data, ID2SYM(rb_intern("measurement")));
method_data->measurement = prof_get_measurement(measurement);
VALUE allocations = rb_hash_aref(data, ID2SYM(rb_intern("allocations")));
prof_allocations_unwrap(method_data->allocations_table, allocations);
return data;
}
void rp_init_method_info()
{
/* MethodInfo */
cRpMethodInfo = rb_define_class_under(mProf, "MethodInfo", rb_cObject);
rb_define_const(cRpMethodInfo, "MODULE_INCLUDEE", INT2NUM(kModuleIncludee));
rb_define_const(cRpMethodInfo, "CLASS_SINGLETON", INT2NUM(kClassSingleton));
rb_define_const(cRpMethodInfo, "MODULE_SINGLETON", INT2NUM(kModuleSingleton));
rb_define_const(cRpMethodInfo, "OBJECT_SINGLETON", INT2NUM(kObjectSingleton));
rb_define_const(cRpMethodInfo, "OTHER_SINGLETON", INT2NUM(kOtherSingleton));
rb_define_alloc_func(cRpMethodInfo, prof_method_allocate);
rb_define_method(cRpMethodInfo, "initialize", prof_method_initialize, 2);
rb_define_method(cRpMethodInfo, "hash", prof_method_hash, 0);
rb_define_method(cRpMethodInfo, "klass_name", prof_method_klass_name, 0);
rb_define_method(cRpMethodInfo, "klass_flags", prof_method_klass_flags, 0);
rb_define_method(cRpMethodInfo, "method_name", prof_method_name, 0);
rb_define_method(cRpMethodInfo, "call_trees", prof_method_call_trees, 0);
rb_define_method(cRpMethodInfo, "allocations", prof_method_allocations, 0);
rb_define_method(cRpMethodInfo, "measurement", prof_method_measurement, 0);
rb_define_method(cRpMethodInfo, "source_file", prof_method_source_file, 0);
rb_define_method(cRpMethodInfo, "line", prof_method_line, 0);
rb_define_method(cRpMethodInfo, "recursive?", prof_method_recursive, 0);
rb_define_method(cRpMethodInfo, "_dump_data", prof_method_dump, 0);
rb_define_method(cRpMethodInfo, "_load_data", prof_method_load, 1);
}