| // Copyright 2018 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // TRACE_<event> macros to simplify emitting vthread events. |
| // Note: This only provides a C++ implementation. |
| |
| // A note on the style of the macros here. |
| // These macros have a public API which is what you see here. |
| // Underlying that are the *_INTERNAL_* macros which you intentionally do not |
| // see here. This is to help avoid thinking anything underneath is something |
| // that is public and usable. |
| |
| #ifndef TRACE_VTHREAD_EVENT_VTHREAD_H_ |
| #define TRACE_VTHREAD_EVENT_VTHREAD_H_ |
| |
| #include <trace-vthread/internal/event_vthread.h> |
| |
| // Writes a virtual thread duration begin event. |
| // This event must be matched by a duration end event with the same category, |
| // name and virtual thread. |
| // |
| // Virtual thread durations describe work which is happening synchronously on |
| // a timeline other than the CPU's (E.g. the GPU). |
| // They can be nested to represent a control flow stack. |
| // The virtual thread id serves to identify the timeline within the process. |
| // |
| // 0 to 15 arguments can be associated with the event, each of which is used |
| // to annotate the duration with additional information. The arguments |
| // provided to matching duration begin and duration end events are combined |
| // together in the trace; it is not necessary to repeat them. |
| // |
| // |category_literal|, |name_literal| and |vthread_literal| must be |
| // null-terminated static string constants. |
| // |vthread_id| is the correlation id of the virtual thread. |
| // Must be unique for a given process. |
| // |timestamp| is the tick that the duration event begins. |
| // |args| is the list of argument key/value pairs. |
| // |
| // Usage: |
| // |
| // trace_vthread_id_t vthread_id = 444; |
| // zx_ticks_t curr_ticks = zx_ticks_get(); |
| // TRACE_VTHREAD_DURATION_BEGIN("category", "name", "vthread", vthread_id, |
| // curr_ticks, "x", TA_INT32(42)); |
| // |
| #define TRACE_VTHREAD_DURATION_BEGIN(category_literal, name_literal, \ |
| vthread_literal, vthread_id, \ |
| timestamp, args...) \ |
| TRACE_VTHREAD_INTERNAL_DURATION_BEGIN( \ |
| (category_literal), (name_literal), (vthread_literal), (vthread_id), \ |
| (timestamp), args) |
| |
| // Writes a virtual thread duration end event. |
| // |
| // Virtual thread durations describe work which is happening synchronously on |
| // a timeline other than the CPU's (E.g. the GPU). |
| // They can be nested to represent a control flow stack. |
| // The virtual thread id serves to identify the timeline within the process. |
| // |
| // 0 to 15 arguments can be associated with the event, each of which is used |
| // to annotate the duration with additional information. The arguments |
| // provided to matching duration begin and duration end events are combined |
| // together in the trace; it is not necessary to repeat them. |
| // |
| // |category_literal|, |name_literal| and |vthread_literal| must be |
| // null-terminated static string constants. |
| // |vthread_id| is the correlation id of the virtual thread. |
| // Must be unique for a given process. |
| // |timestamp| is the tick that the duration event ends. |
| // |args| is the list of argument key/value pairs. |
| // |
| // Usage: |
| // |
| // trace_vthread_id_t vthread_id = 444; |
| // zx_ticks_t curr_ticks = zx_ticks_get(); |
| // TRACE_VTHREAD_DURATION_END("category", "name", "vthread", vthread_id, |
| // curr_ticks, "x", TA_INT32(42)); |
| // |
| #define TRACE_VTHREAD_DURATION_END(category_literal, name_literal, \ |
| vthread_literal, vthread_id, \ |
| timestamp, args...) \ |
| TRACE_VTHREAD_INTERNAL_DURATION_END( \ |
| (category_literal), (name_literal), (vthread_literal), (vthread_id), \ |
| (timestamp), args) |
| |
| // Writes a virtual thread flow begin event with the specified id. |
| // This event may be followed by flow steps events and must be matched by |
| // a flow end event with the same category, name, virtual thread and id. |
| // |
| // Flow events describe control flow handoffs between threads or across |
| // processes. |
| // They are typically represented as arrows in a visualizer. Flow arrows are |
| // from the end of the duration event which encloses the beginning of the flow |
| // to the beginning of the duration event which encloses the next step or the |
| // end of the flow. The id serves to correlate flows which share the same |
| // category and name across processes. |
| // |
| // This event must be enclosed in a duration event which represents where |
| // the flow handoff occurs. |
| // |
| // 0 to 15 arguments can be associated with the event, each of which is used |
| // to annotate the flow with additional information. The arguments provided |
| // to matching flow begin, flow step, and flow end events are combined |
| // together in the trace; it is not necessary to repeat them. |
| // |
| // |category_literal|, |name_literal| and |vthread_literal| must be |
| // null-terminated static string constants. |
| // |vthread_id| is the correlation id of the virtual thread. |
| // Must be unique for a given process. |
| // |flow_id| is the correlation id of the flow. |
| // Must be unique for a given category and name combination. |
| // |timestamp| is the tick that the flow begins. |
| // |args| is the list of argument key/value pairs. |
| // |
| // Usage: |
| // |
| // trace_vthread_id_t vthread_id = 444; |
| // trace_flow_id_t flow_id = 555; |
| // zx_ticks_t curr_ticks = zx_ticks_get(); |
| // TRACE_VTHREAD_FLOW_BEGIN("category", "name", "vthread", vthread_id, |
| // flow_id, curr_ticks, "x", TA_INT32(42)); |
| // |
| #define TRACE_VTHREAD_FLOW_BEGIN(category_literal, name_literal, \ |
| vthread_literal, vthread_id, flow_id, \ |
| timestamp, args...) \ |
| TRACE_VTHREAD_INTERNAL_FLOW_BEGIN( \ |
| (category_literal), (name_literal), (vthread_literal), (vthread_id), \ |
| (flow_id), (timestamp), args) |
| |
| // Writes a virtual thread flow step event with the specified id. |
| // |
| // Flow events describe control flow handoffs between threads or across |
| // processes. |
| // They are typically represented as arrows in a visualizer. Flow arrows are |
| // from the end of the duration event which encloses the beginning of the flow |
| // to the beginning of the duration event which encloses the next step or the |
| // end of the flow. The id serves to correlate flows which share the same |
| // category and name across processes. |
| // |
| // This event must be enclosed in a duration event which represents where |
| // the flow handoff occurs. |
| // |
| // 0 to 15 arguments can be associated with the event, each of which is used |
| // to annotate the flow with additional information. The arguments provided |
| // to matching flow begin, flow step, and flow end events are combined |
| // together in the trace; it is not necessary to repeat them. |
| // |
| // |category_literal|, |name_literal| and |vthread_literal| must be |
| // null-terminated static string constants. |
| // |vthread_id| is the correlation id of the virtual thread. |
| // Must be unique for a given process. |
| // |flow_id| is the correlation id of the flow. |
| // Must be unique for a given category and name combination. |
| // |timestamp| is the tick that the flow steps. |
| // |args| is the list of argument key/value pairs. |
| // |
| // Usage: |
| // |
| // trace_vthread_id_t vthread_id = 444; |
| // trace_flow_id_t flow_id = 555; |
| // zx_ticks_t curr_ticks = zx_ticks_get(); |
| // TRACE_VTHREAD_FLOW_STEP("category", "name", "vthread", vthread_id, |
| // flow_id, curr_ticks, "x", TA_INT32(42)); |
| // |
| #define TRACE_VTHREAD_FLOW_STEP(category_literal, name_literal, \ |
| vthread_literal, vthread_id, flow_id, \ |
| timestamp, args...) \ |
| TRACE_VTHREAD_INTERNAL_FLOW_STEP( \ |
| (category_literal), (name_literal), (vthread_literal), (vthread_id), \ |
| (flow_id), (timestamp), args) |
| |
| // Writes a virtual thread flow end event with the specified id. |
| // |
| // Flow events describe control flow handoffs between threads or across |
| // processes. |
| // They are typically represented as arrows in a visualizer. Flow arrows are |
| // from the end of the duration event which encloses the beginning of the flow |
| // to the beginning of the duration event which encloses the next step or the |
| // end of the flow. The id serves to correlate flows which share the same |
| // category and name across processes. |
| // |
| // This event must be enclosed in a duration event which represents where |
| // the flow handoff occurs. |
| // |
| // 0 to 15 arguments can be associated with the event, each of which is used |
| // to annotate the flow with additional information. The arguments provided |
| // to matching flow begin, flow step, and flow end events are combined |
| // together in the trace; it is not necessary to repeat them. |
| // |
| // |category_literal|, |name_literal| and |vthread_literal| must be |
| // null-terminated static string constants. |
| // |vthread_id| is the correlation id of the virtual thread. |
| // Must be unique for a given process. |
| // |flow_id| is the correlation id of the flow. |
| // Must be unique for a given category and name combination. |
| // |timestamp| is the tick that the flow ends. |
| // |args| is the list of argument key/value pairs. |
| // |
| // Usage: |
| // |
| // trace_vthread_id_t vthread_id = 444; |
| // trace_flow_id_t flow_id = 555; |
| // zx_ticks_t curr_ticks = zx_ticks_get(); |
| // TRACE_VTHREAD_FLOW_END("category", "name", "vthread", vthread_id, |
| // flow_id, curr_ticks, "x", TA_INT32(42)); |
| // |
| #define TRACE_VTHREAD_FLOW_END(category_literal, name_literal, \ |
| vthread_literal, vthread_id, flow_id, \ |
| timestamp, args...) \ |
| TRACE_VTHREAD_INTERNAL_FLOW_END( \ |
| (category_literal), (name_literal), (vthread_literal), (vthread_id), \ |
| (flow_id), (timestamp), args) |
| |
| #endif // TRACE_VTHREAD_EVENT_VTHREAD_H_ |
