[osal]: Add mpp_trace using ftrace

Change-Id: I6c6597d722f574524f1b993a18f6cd868b20fbab
Signed-off-by: Herman Chen <herman.chen@rock-chips.com>

osal/mpp_trace.cpp

@@ -0,0 +1,170 @@
+/*
+ * Copyright 2021 Rockchip Electronics Co. LTD
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define MODULE_TAG "mpp_trace"
+
+#include <fcntl.h>
+#include <stdarg.h>
+
+#include "mpp_common.h"
+#include "mpp_trace.h"
+
+#define ATRACE_MESSAGE_LENGTH 256
+
+class MppTraceService
+{
+private:
+    // avoid any unwanted function
+    MppTraceService();
+    ~MppTraceService();
+    MppTraceService(const MppTraceService &);
+    MppTraceService &operator=(const MppTraceService &);
+
+    void trace_write(const char *fmt, ...);
+
+    RK_S32 mTraceFd;
+
+public:
+    static MppTraceService *get_inst() {
+        static MppTraceService inst;
+        return &inst;
+    }
+
+    void trace_begin(const char* name);
+    void trace_end(const char* name);
+    void trace_async_begin(const char* name, RK_S32 cookie);
+    void trace_async_end(const char* name, RK_S32 cookie);
+    void trace_int32(const char* name, RK_S32 val);
+    void trace_int64(const char* name, RK_S64 val);
+};
+
+MppTraceService::MppTraceService()
+{
+    static const char *ftrace_paths[] = {
+        "/sys/kernel/debug/tracing/trace_marker",
+        "/debug/tracing/trace_marker",
+        "/debugfs/tracing/trace_marker",
+    };
+
+    RK_U32 i;
+
+    for (i = 0; i < MPP_ARRAY_ELEMS(ftrace_paths); i++) {
+        if (!access(ftrace_paths[i], F_OK)) {
+            mTraceFd = open(ftrace_paths[i], O_WRONLY | O_CLOEXEC);
+            if (mTraceFd >= 0)
+                break;
+        }
+    }
+}
+
+MppTraceService::~MppTraceService()
+{
+    if (mTraceFd >= 0) {
+        close(mTraceFd);
+        mTraceFd = -1;
+    }
+}
+
+void MppTraceService::trace_write(const char *fmt, ...)
+{
+    char buf[ATRACE_MESSAGE_LENGTH];
+    va_list ap;
+    RK_S32 len;
+
+    va_start(ap, fmt);
+    len = vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+    va_end(ap);
+
+    write(mTraceFd, buf, len);
+}
+
+void MppTraceService::trace_begin(const char* name)
+{
+    if (mTraceFd < 0)
+        return;
+
+    trace_write("B|%d|%s", getpid(), name);
+}
+
+void MppTraceService::trace_end(const char* name)
+{
+    if (mTraceFd < 0)
+        return;
+
+    trace_write("E|%d|%s", getpid(), name);
+}
+
+void MppTraceService::trace_async_begin(const char* name, RK_S32 cookie)
+{
+    if (mTraceFd < 0)
+        return;
+
+    trace_write("S|%d|%s|%d", getpid(), name, cookie);
+}
+
+void MppTraceService::trace_async_end(const char* name, RK_S32 cookie)
+{
+    if (mTraceFd < 0)
+        return;
+
+    trace_write("F|%d|%s|%d", getpid(), name, cookie);
+}
+
+void MppTraceService::trace_int32(const char* name, RK_S32 value)
+{
+    if (mTraceFd < 0)
+        return;
+
+    trace_write("C|%d|%s|%d", getpid(), name, value);
+}
+
+void MppTraceService::trace_int64(const char* name, RK_S64 value)
+{
+    if (mTraceFd < 0)
+        return;
+
+    trace_write("C|%d|%s|%lld", getpid(), name, value);
+}
+
+void mpp_trace_begin(const char* name)
+{
+    MppTraceService::get_inst()->trace_begin(name);
+}
+
+void mpp_trace_end(const char* name)
+{
+    MppTraceService::get_inst()->trace_end(name);
+}
+
+void mpp_trace_async_begin(const char* name, RK_S32 cookie)
+{
+    MppTraceService::get_inst()->trace_async_begin(name, cookie);
+}
+
+void mpp_trace_async_end(const char* name, RK_S32 cookie)
+{
+    MppTraceService::get_inst()->trace_async_end(name, cookie);
+}
+
+void mpp_trace_int32(const char* name, RK_S32 value)
+{
+    MppTraceService::get_inst()->trace_int32(name, value);
+}
+
+void mpp_trace_int64(const char* name, RK_S64 value)
+{
+    MppTraceService::get_inst()->trace_int64(name, value);
+}