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#ifndef RB_DEBUG_H /*-*-C++-*-vi:se ft=cpp:*/ #define RB_DEBUG_H 1 /** * @file * @author $Author: ko1 $ * @date Tue Nov 20 20:35:08 2012 * @copyright Copyright (C) 2012 Yukihiro Matsumoto * @copyright This file is a part of the programming language Ruby. * Permission is hereby granted, to either redistribute and/or * modify this file, provided that the conditions mentioned in the * file COPYING are met. Consult the file for details. */ #include "ruby/internal/attr/nonnull.h" #include "ruby/internal/attr/returns_nonnull.h" #include "ruby/internal/dllexport.h" #include "ruby/internal/event.h" #include "ruby/internal/value.h" RBIMPL_SYMBOL_EXPORT_BEGIN() /* Note: This file contains experimental APIs. */ /* APIs can be replaced at Ruby 2.0.1 or later */ /** * @name Frame-profiling APIs * * @{ */ RBIMPL_ATTR_NONNULL((3)) /** * Queries mysterious "frame"s of the given range. * * The returned values are opaque backtrace pointers, which you are allowed to * issue a very limited set of operations listed below. Don't call arbitrary * ruby methods. * * @param[in] start Start position (0 means the topmost). * @param[in] limit Number objects of `buff`. * @param[out] buff Return buffer. * @param[out] lines Return buffer. * @return Number of objects filled into `buff`. * @post `buff` is filled with backtrace pointers. * @post `lines` is filled with `__LINE__` of each backtraces. * * @internal * * @shyouhei doesn't like this abuse of ::VALUE. It should have been * `const struct rb_callable_method_entry_struct *`. */ int rb_profile_frames(int start, int limit, VALUE *buff, int *lines); /** * Queries the path of the passed backtrace. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil The frame is implemented in C etc. * @retval otherwise Where `frame` is running. */ VALUE rb_profile_frame_path(VALUE frame); /** * Identical to rb_profile_frame_path(), except it tries to expand the * returning path. In case the path is `require`-d from something else * rb_profile_frame_path() can return relative paths. This one tries to avoid * that. * * @param[in] frame What rb_profile_frames() returned. * @retval "<cfunc>" The frame is in C. * @retval RUBY_Qnil Can't infer real path (inside of `eval` etc.). * @retval otherwise Where `frame` is running. */ VALUE rb_profile_frame_absolute_path(VALUE frame); /** * Queries human-readable "label" string. This is `"<main>"` for the toplevel, * `"<compiled>"` for evaluated ones, method name for methods, class name for * classes. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil Can't infer the label (C etc.). * @retval "<main>" The frame is global toplevel. * @retval "<compiled>" The frame is dynamic. * @retval otherwise Label of the frame. */ VALUE rb_profile_frame_label(VALUE frame); /** * Identical to rb_profile_frame_label(), except it does not "qualify" the * result. Consider the following backtrace: * * ```ruby * def bar * caller_locations * end * * def foo * [1].map { bar }.first * end * * obj = foo.first * obj.label # => "block in foo" * obj.base_label # => "foo" * ``` * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil Can't infer the label (C etc.). * @retval "<main>" The frame is global toplevel. * @retval "<compiled>" The frame is dynamic. * @retval otherwise Base label of the frame. */ VALUE rb_profile_frame_base_label(VALUE frame); /** * Identical to rb_profile_frame_label(), except it returns a qualified result. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil Can't infer the label (C etc.). * @retval "<main>" The frame is global toplevel. * @retval "<compiled>" The frame is dynamic. * @retval otherwise Qualified label of the frame. * * @internal * * As of writing there is no way to obtain this return value from a Ruby * script. This may change in future (it took 8 years and still no progress, * though). */ VALUE rb_profile_frame_full_label(VALUE frame); /** * Queries the first line of the method of the passed frame pointer. Can be * handy when for instance a debugger want to display the frame in question. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil Can't infer the line (C etc.). * @retval otherwise Line number of the method in question. */ VALUE rb_profile_frame_first_lineno(VALUE frame); /** * Queries the class path of the method that the passed frame represents. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil Can't infer the class (global toplevel etc.). * @retval otherwise Class path as in rb_class_path(). */ VALUE rb_profile_frame_classpath(VALUE frame); /** * Queries if the method of the passed frame is a singleton class. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qtrue It is a singleton method. * @retval RUBY_Qfalse Otherwise (normal method/non-method). */ VALUE rb_profile_frame_singleton_method_p(VALUE frame); /** * Queries the name of the method of the passed frame. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil The frame in question is not a method. * @retval otherwise Name of the method of the frame. */ VALUE rb_profile_frame_method_name(VALUE frame); /** * Identical to rb_profile_frame_method_name(), except it "qualifies" the * return value with its defining class. * * @param[in] frame What rb_profile_frames() returned. * @retval RUBY_Qnil The frame in question is not a method. * @retval otherwise Qualified name of the method of the frame. */ VALUE rb_profile_frame_qualified_method_name(VALUE frame); /** @} */ /** * @name Debug inspector APIs * * @{ */ /** Opaque struct representing a debug inspector. */ typedef struct rb_debug_inspector_struct rb_debug_inspector_t; /** * Type of the callback function passed to rb_debug_inspector_open(). * Inspection shall happen only inside of them. The passed pointers gets * invalidated once after the callback returns. * * @param[in] dc A debug context. * @param[in,out] data What was passed to rb_debug_inspector_open(). * @return What would be the return value of rb_debug_inspector_open(). */ typedef VALUE (*rb_debug_inspector_func_t)(const rb_debug_inspector_t *dc, void *data); /** * Prepares, executes, then cleans up a debug session. * * @param[in] func A callback to run inside of a debug session. * @param[in,out] data Passed as-is to `func`. * @return What was returned from `func`. */ VALUE rb_debug_inspector_open(rb_debug_inspector_func_t func, void *data); /** * Queries the current receiver of the passed context's upper frame. * * @param[in] dc A debug context. * @param[in] index Index of the frame from top to bottom. * @exception rb_eArgError `index` out of range. * @return The current receiver at `index`-th frame. */ VALUE rb_debug_inspector_frame_self_get(const rb_debug_inspector_t *dc, long index); /** * Queries the current class of the passed context's upper frame. * * @param[in] dc A debug context. * @param[in] index Index of the frame from top to bottom. * @exception rb_eArgError `index` out of range. * @return The current class at `index`-th frame. */ VALUE rb_debug_inspector_frame_class_get(const rb_debug_inspector_t *dc, long index); /** * Queries the binding of the passed context's upper frame. * * @param[in] dc A debug context. * @param[in] index Index of the frame from top to bottom. * @exception rb_eArgError `index` out of range. * @return The binding at `index`-th frame. */ VALUE rb_debug_inspector_frame_binding_get(const rb_debug_inspector_t *dc, long index); /** * Queries the instruction sequence of the passed context's upper frame. * * @param[in] dc A debug context. * @param[in] index Index of the frame from top to bottom. * @exception rb_eArgError `index` out of range. * @retval RUBY_Qnil `index`-th frame is not in Ruby (C etc.). * @retval otherwise An instance of `RubyVM::InstructionSequence` which * represents the instruction sequence at `index`-th * frame. */ VALUE rb_debug_inspector_frame_iseq_get(const rb_debug_inspector_t *dc, long index); /** * Queries the backtrace object of the context. This is as if you call * `caller_locations` at the point of debugger. * * @param[in] dc A debug context. * @return An array of `Thread::Backtrace::Location` which represents the * current point of execution at `dc`. */ VALUE rb_debug_inspector_backtrace_locations(const rb_debug_inspector_t *dc); /** @} */ /** * @name Old style set_trace_func APIs * * @{ */ /* duplicated def of include/ruby/ruby.h */ #include "ruby/internal/event.h" /** * Identical to rb_remove_event_hook(), except it additionally takes the data * argument. This extra argument is the same as that of rb_add_event_hook(), * and this function removes the hook which matches both arguments at once. * * @param[in] func A callback. * @param[in] data What to be passed to `func`. * @return Number of deleted event hooks. * @note As multiple events can share the same `func` it is quite * possible for the return value to become more than one. */ int rb_remove_event_hook_with_data(rb_event_hook_func_t func, VALUE data); /** * Identical to rb_add_event_hook(), except its effect is limited to the passed * thread. Other threads are not affected by this. * * @param[in] thval An instance of ::rb_cThread. * @param[in] func A callback. * @param[in] events A set of events that `func` should run. * @param[in] data Passed as-is to `func`. * @exception rb_eTypeError `thval` is not a thread. */ void rb_thread_add_event_hook(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data); /** * Identical to rb_remove_event_hook(), except it additionally takes a thread * argument. This extra argument is the same as that of * rb_thread_add_event_hook(), and this function removes the hook which matches * both arguments at once. * * @param[in] thval An instance of ::rb_cThread. * @param[in] func A callback. * @exception rb_eTypeError `thval` is not a thread. * @return Number of deleted event hooks. * @note As multiple events can share the same `func` it is quite * possible for the return value to become more than one. */ int rb_thread_remove_event_hook(VALUE thval, rb_event_hook_func_t func); /** * Identical to rb_thread_remove_event_hook(), except it additionally takes the * data argument. It can also be seen as a routine identical to * rb_remove_event_hook_with_data(), except it additionally takes the thread. * This function deletes hooks that satisfy all three criteria. * * @param[in] thval An instance of ::rb_cThread. * @param[in] func A callback. * @param[in] data What to be passed to `func`. * @exception rb_eTypeError `thval` is not a thread. * @return Number of deleted event hooks. * @note As multiple events can share the same `func` it is quite * possible for the return value to become more than one. */ int rb_thread_remove_event_hook_with_data(VALUE thval, rb_event_hook_func_t func, VALUE data); /** @} */ /** * @name TracePoint APIs * * @{ */ /** * Creates a tracepoint by registering a callback function for one or more * tracepoint events. Once the tracepoint is created, you can use * rb_tracepoint_enable to enable the tracepoint. * * @param[in] target_thread_not_supported_yet Meant for picking the * thread in which the tracepoint is to be created. * However, current implementation ignore this * parameter, tracepoint is created for all threads. * Simply specify Qnil. * @param[in] events Event(s) to listen to. * @param[in] func A callback function. * @param[in,out] data Void pointer that will be passed to the callback * function. * * When the callback function is called, it will be passed 2 parameters: * 1. `VALUE tpval` - the TracePoint object from which trace args can be * extracted. * 1. `void *data` - A void pointer which helps to share scope with the * callback function. * * It is important to note that you cannot register callbacks for normal events * and internal events simultaneously because they are different purpose. You * can use any Ruby APIs (calling methods and so on) on normal event hooks. * However, in internal events, you can not use any Ruby APIs (even object * creations). This is why we can't specify internal events by TracePoint * directly. Limitations are MRI version specific. * * Example: * * ```CXX * rb_tracepoint_new( * Qnil, * RUBY_INTERNAL_EVENT_NEWOBJ | RUBY_INTERNAL_EVENT_FREEOBJ, * obj_event_i, * data); * ``` * * In this example, a callback function `obj_event_i` will be registered for * internal events #RUBY_INTERNAL_EVENT_NEWOBJ and * #RUBY_INTERNAL_EVENT_FREEOBJ. */ VALUE rb_tracepoint_new(VALUE target_thread_not_supported_yet, rb_event_flag_t events, void (*func)(VALUE, void *), void *data); /** * Starts (enables) trace(s) defined by the passed object. A TracePoint object * does not immediately take effect on creation. You have to explicitly call * this API. * * @param[in] tpval An instance of TracePoint. * @exception rb_eArgError A trace is already running. * @return Undefined value. Forget this. It should have returned `void`. * @post Trace(s) defined by `tpval` start. */ VALUE rb_tracepoint_enable(VALUE tpval); /** * Stops (disables) an already running instance of TracePoint. * * @param[in] tpval An instance of TracePoint. * @return Undefined value. Forget this. It should have returned `void`. * @post Trace(s) defined by `tpval` stop. */ VALUE rb_tracepoint_disable(VALUE tpval); /** * Queries if the passed TracePoint is up and running. * * @param[in] tpval An instance of TracePoint. * @retval RUBY_Qtrue It is. * @retval RUBY_Qfalse It isn't. */ VALUE rb_tracepoint_enabled_p(VALUE tpval); /** * Type that represents a specific trace event. Roughly resembles the * tracepoint object that is passed to the block of `TracePoint.new`: * * ```ruby * TracePoint.new(*events) do |obj| * ... # ^^^^^ Resembles this object. * end * ``` */ typedef struct rb_trace_arg_struct rb_trace_arg_t; RBIMPL_ATTR_RETURNS_NONNULL() /** * Queries the current event of the passed tracepoint. * * @param[in] tpval An instance of TracePoint. * @exception rb_eRuntimeError `tpval` is disabled. * @return The current event. * * @internal * * `tpval` is a fake. There is only one instance of ::rb_trace_arg_t at one * time. This function just returns that global variable. */ rb_trace_arg_t *rb_tracearg_from_tracepoint(VALUE tpval); RBIMPL_ATTR_NONNULL(()) /** * Queries the event of the passed trace. * * @param[in] trace_arg A trace instance. * @return Its event. */ rb_event_flag_t rb_tracearg_event_flag(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Identical to rb_tracearg_event_flag(), except it returns the name of the * event in Ruby's symbol. * * @param[in] trace_arg A trace instance. * @return Its event, in Ruby level Symbol object. */ VALUE rb_tracearg_event(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the line of the point where the trace is at. * * @param[in] trace_arg A trace instance. * @retval 0 The trace is not at Ruby frame. * @return otherwise Its line number. */ VALUE rb_tracearg_lineno(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the file name of the point where the trace is at. * * @param[in] trace_arg A trace instance. * @retval RUBY_Qnil The trace is not at Ruby frame. * @retval otherwise Its path. */ VALUE rb_tracearg_path(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the method name of the point where the trace is at. * * @param[in] trace_arg A trace instance. * @retval RUBY_Qnil There is no method. * @retval otherwise Its method name, in Ruby level Symbol. */ VALUE rb_tracearg_method_id(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Identical to rb_tracearg_method_id(), except it returns callee id like * rb_frame_callee(). * * @param[in] trace_arg A trace instance. * @retval RUBY_Qnil There is no method. * @retval otherwise Its method name, in Ruby level Symbol. */ VALUE rb_tracearg_callee_id(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the class that defines the method that the passed trace is at. This * can be different from the class of rb_tracearg_self()'s return value because * of inheritance(s). * * @param[in] trace_arg A trace instance. * @retval RUBY_Qnil There is no method. * @retval otherwise Its method's class. */ VALUE rb_tracearg_defined_class(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Creates a binding object of the point where the trace is at. * * @param[in] trace_arg A trace instance. * @retval RUBY_Qnil The point has no binding. * @retval otherwise Its binding. * * @internal * * @shyouhei has no idea on which situation shall this function return * ::RUBY_Qnil. */ VALUE rb_tracearg_binding(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the receiver of the point trace is at. * * @param[in] trace_arg A trace instance. * @return Its receiver. */ VALUE rb_tracearg_self(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the return value that the trace represents. * * @param[in] trace_arg A trace instance. * @exception rb_eRuntimeError The tracing event is not return-related. * @return The return value. */ VALUE rb_tracearg_return_value(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the raised exception that the trace represents. * * @param[in] trace_arg A trace instance. * @exception rb_eRuntimeError The tracing event is not exception-related. * @return The raised exception. */ VALUE rb_tracearg_raised_exception(rb_trace_arg_t *trace_arg); RBIMPL_ATTR_NONNULL(()) /** * Queries the allocated/deallocated object that the trace represents. * * @param[in] trace_arg A trace instance. * @exception rb_eRuntimeError The tracing event is not GC-related. * @return The allocated/deallocated object. */ VALUE rb_tracearg_object(rb_trace_arg_t *trace_arg); /** @} */ /** * @name Postponed Job API * * @{ */ /* * Postponed Job API * rb_postponed_job_register and rb_postponed_job_register_one are * async-signal-safe and used via SIGPROF by the "stackprof" RubyGem */ /** * Type of postponed jobs. * * @param[in,out] arg What was passed to rb_postponed_job_register(). */ typedef void (*rb_postponed_job_func_t)(void *arg); /** * Registers a postponed job. * * There are situations when running a ruby program is not possible. For * instance when a program is in a signal handler; for another instance when * the GC is busy. On such situations however, there might be needs to do * something. We cannot but defer such operations until we are 100% sure it is * safe to execute them. This mechanism is called postponed jobs. This * function registers a new one. The registered job would eventually gets * executed. * * @param[in] flags (Unused) reserved for future extensions. * @param[in] func Job body. * @param[in,out] data Passed as-is to `func`. * @retval 0 Postponed job buffer is full. Failed. * @retval otherwise Opaque return value. * @post The passed job is postponed. */ int rb_postponed_job_register(unsigned int flags, rb_postponed_job_func_t func, void *data); /** * Identical to rb_postponed_job_register_one(), except it additionally checks * for duplicated registration. In case the passed job is already in the * postponed job buffer this function does nothing. * * @param[in] flags (Unused) reserved for future extensions. * @param[in] func Job body. * @param[in,out] data Passed as-is to `func`. * @retval 0 Postponed job buffer is full. Failed. * @retval otherwise Opaque return value. */ int rb_postponed_job_register_one(unsigned int flags, rb_postponed_job_func_t func, void *data); /** @} */ /** * @cond INTERNAL_MACRO * * Anything after this are intentionally left undocumented, to honour the * comment below. */ /* undocumented advanced tracing APIs */ typedef enum { RUBY_EVENT_HOOK_FLAG_SAFE = 0x01, RUBY_EVENT_HOOK_FLAG_DELETED = 0x02, RUBY_EVENT_HOOK_FLAG_RAW_ARG = 0x04 } rb_event_hook_flag_t; void rb_add_event_hook2(rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_event_hook_flag_t hook_flag); void rb_thread_add_event_hook2(VALUE thval, rb_event_hook_func_t func, rb_event_flag_t events, VALUE data, rb_event_hook_flag_t hook_flag); /** @endcond */ RBIMPL_SYMBOL_EXPORT_END() #endif /* RUBY_DEBUG_H */