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u/tracing: Add trace marker code

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This commit is contained in:
Jakob Bornecrantz 2021-02-22 20:33:58 +00:00
parent 75e908552f
commit 3077660f1d
6 changed files with 232 additions and 0 deletions
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2
CMakeLists.txt
View file

@ -116,6 +116,7 @@ endif()
option(BUILD_TESTING "Enable building of the test suite?" ON)
option(XRT_FEATURE_COLOR_LOG "Enable logging in color on supported platforms" ON)
option(XRT_FEATURE_TRACING "Enable debug tracing on supported platforms" OFF)
cmake_dependent_option(CMAKE_INTERPROCEDURAL_OPTIMIZATION "Enable inter-procedural (link-time) optimization" OFF "HAS_IPO" OFF)
cmake_dependent_option(XRT_HAVE_WAYLAND "Enable Wayland support" ON "WAYLAND_FOUND AND WAYLAND_SCANNER_FOUND AND WAYLAND_PROTOCOLS_FOUND" OFF)
@ -335,6 +336,7 @@ message(STATUS "# FEATURE_OPENXR_LAYER_EQUIRECT2: ${XRT_FEATURE_OPENXR_
message(STATUS "# FEATURE_OPENXR_LAYER_EQUIRECT1: ${XRT_FEATURE_OPENXR_LAYER_EQUIRECT1}")
message(STATUS "# FEATURE_STEAMVR_PLUGIN: ${XRT_FEATURE_STEAMVR_PLUGIN}")
message(STATUS "# FEATURE_COLOR_LOG: ${XRT_FEATURE_COLOR_LOG}")
message(STATUS "# FEATURE_TRACING: ${XRT_FEATURE_TRACING}")
message(STATUS "#")
message(STATUS "# DRIVER_ANDROID: ${XRT_BUILD_DRIVER_ANDROID}")
message(STATUS "# DRIVER_ARDUINO: ${XRT_BUILD_DRIVER_ARDUINO}")

2
src/xrt/auxiliary/CMakeLists.txt
View file

@ -141,6 +141,8 @@ set(UTIL_SOURCE_FILES
util/u_time.h
util/u_timing_render.c
util/u_timing_render.h
util/u_trace_marker.c
util/u_trace_marker.h
util/u_var.cpp
util/u_var.h
util/u_config_json.c

2
src/xrt/auxiliary/meson.build
View file

@ -56,6 +56,8 @@ lib_aux_util = static_library(
'util/u_time.h',
'util/u_timing_render.c',
'util/u_timing_render.h',
'util/u_trace_marker.c',
'util/u_trace_marker.h',
'util/u_var.cpp',
'util/u_var.h',
'util/u_config_json.c',

94
src/xrt/auxiliary/util/u_trace_marker.c Normal file
View file

@ -0,0 +1,94 @@
// Copyright 2020-2021, Collabora, Ltd.
// SPDX-License-Identifier: BSL-1.0
/*!
* @file
* @brief Trace marking debugging code.
* @author Jakob Bornecrantz <jakob@collabora.com>
* @ingroup aux_util
*/
// This needs to be first.
#define _GNU_SOURCE
#include <unistd.h>
#include <sys/types.h>
#include "xrt/xrt_compiler.h"
#include "u_trace_marker.h"
#include <stdio.h>
#include <fcntl.h>
#include <stdarg.h>
#include <pthread.h>
#include <sys/stat.h>
#define TRACE_MARKER_FILENAME "/sys/kernel/tracing/trace_marker"
int u_trace_xrt_fd = -1;
int u_trace_ipc_fd = -1;
int u_trace_oxr_fd = -1;
int u_trace_comp_fd = -1;
void
u_tracer_maker_init(void)
{
int fd = open(TRACE_MARKER_FILENAME, O_WRONLY);
u_trace_oxr_fd = fd;
u_trace_ipc_fd = fd;
u_trace_xrt_fd = fd;
u_trace_comp_fd = fd;
}
void
u_trace_enter(int fd, const char *func)
{
if (fd < 0) {
return;
}
char tmp[512];
ssize_t len = snprintf(tmp, sizeof(tmp), "B %u %s", getpid(), func);
if (len > 0) {
len = write(fd, tmp, len);
}
}
void
u_trace_leave(int fd, const char *func)
{
if (fd < 0) {
return;
}
char tmp[512];
ssize_t len = snprintf(tmp, sizeof(tmp), "E %u %s", getpid(), func);
if (len > 0) {
len = write(fd, tmp, len);
}
}
void
u_trace_data(int fd, enum u_trace_data_type type, void *data, size_t size)
{
char tmp[1024 * 8];
ssize_t len = snprintf(tmp, sizeof(tmp), "r %u %u %u ", getpid(), type, (uint32_t)size);
if (len <= 0) {
return;
}
for (size_t i = 0; i < size; i++) {
ssize_t ret = snprintf(tmp + (size_t)len, sizeof(tmp) - (size_t)len, "%02x", ((uint8_t *)data)[i]);
if (ret <= 0) {
return;
}
len += ret;
}
if (len > 0) {
len = write(fd, tmp, len);
}
}

130
src/xrt/auxiliary/util/u_trace_marker.h Normal file
View file

@ -0,0 +1,130 @@
// Copyright 2020-2021, Collabora, Ltd.
// SPDX-License-Identifier: BSL-1.0
/*!
* @file
* @brief Trace marking debugging code.
* @author Jakob Bornecrantz <jakob@collabora.com>
* @ingroup aux_util
*/
#pragma once
#include "xrt/xrt_compiler.h"
#include "xrt/xrt_config_os.h"
#include "xrt/xrt_config_build.h"
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
enum u_trace_data_type
{
U_TRACE_DATA_TYPE_TIMING_FRAME,
};
void
u_tracer_maker_init(void);
void
u_trace_enter(int fd, const char *func);
void
u_trace_leave(int fd, const char *func);
void
u_trace_data(int fd, enum u_trace_data_type type, void *data, size_t size);
extern int u_trace_xrt_fd;
extern int u_trace_ipc_fd;
extern int u_trace_oxr_fd;
extern int u_trace_comp_fd;
#define XRT_TRACE_MARKER() U_TRACE_MARKER(u_trace_xrt_fd)
#define IPC_TRACE_MARKER() U_TRACE_MARKER(u_trace_ipc_fd)
#define OXR_TRACE_MARKER() U_TRACE_MARKER(u_trace_oxr_fd)
#define COMP_TRACE_MARKER() U_TRACE_MARKER(u_trace_comp_fd)
#define COMP_TRACE_DATA(type, data) U_TRACE_DATA(u_trace_comp_fd, type, data)
/*
*
* Functions implemented by other modules.
*
*/
void
u_timing_frame_write_json(FILE *file, void *data);
void
u_timing_frame_write_json_metadata(FILE *file);
/*
*
* When enabled.
*
*/
#ifdef XRT_FEATURE_TRACING
#ifndef XRT_OS_LINUX
#error "Tracing only supported on Linux"
#endif
struct u_trace_scoped_struct
{
const char *name;
int data;
};
static inline void
u_trace_scope_cleanup(struct u_trace_scoped_struct *data)
{
u_trace_leave(data->data, data->name);
}
#define U_TRACE_MARKER(fd) \
struct u_trace_scoped_struct __attribute__((cleanup(u_trace_scope_cleanup))) \
u_trace_marker_func_data = {__func__, fd}; \
u_trace_enter(u_trace_marker_func_data.data, u_trace_marker_func_data.name)
#define U_TRACE_DATA(fd, type, data) u_trace_data(fd, type, (void *)&(data), sizeof(data))
#define U_TRACE_TARGET_INIT() \
void __attribute__((constructor(101))) u_trace_maker_constructor(void); \
\
void u_trace_maker_constructor(void) \
{ \
u_tracer_maker_init(); \
}
#else // XRT_FEATURE_TRACING
/*
*
* When disabled.
*
*/
#define U_TRACE_MARKER(fd) \
do { \
} while (false)
#define U_TRACE_DATA(fd, type, data) \
do { \
} while (false)
#define U_TRACE_TARGET_INIT()
#endif // XRT_FEATURE_TRACING
#ifdef __cplusplus
}
#endif

2
src/xrt/include/xrt/xrt_config_build.h.cmake_in
View file

@ -26,3 +26,5 @@
#cmakedefine XRT_FEATURE_OPENXR_LAYER_EQUIRECT1
#cmakedefine XRT_FEATURE_COLOR_LOG
#cmakedefine XRT_FEATURE_TRACING