Add macro to call event logger for errors. DO NOT MERGE (4fd82100) · Commits · e / os / android_system_core

include/log/log.h

+9 −0

Original line number	Diff line number	Diff line
		@@ -531,6 +531,12 @@ typedef enum {
		#define android_btWriteLog(tag, type, payload, len) \
		__android_log_btwrite(tag, type, payload, len)

		#define android_errorWriteLog(tag, subTag) \
		__android_log_error_write(tag, subTag, -1, NULL, 0)

		#define android_errorWriteWithInfoLog(tag, subTag, uid, data, dataLen) \
		__android_log_error_write(tag, subTag, uid, data, dataLen)

		// TODO: remove these prototypes and their users
		#define android_testLog(prio, tag) (1)
		#define android_writevLog(vec,num) do{}while(0)
		@@ -549,6 +555,9 @@ typedef enum {
		LOG_ID_MAX
		} log_id_t;

		int __android_log_error_write(int tag, const char subTag, int32_t uid, const char data,
		uint32_t dataLen);

		/*
		* Send a simple string to the log.
		*/

liblog/Android.mk

+1 −1

Original line number	Diff line number	Diff line
		@@ -16,7 +16,7 @@
		LOCAL_PATH := $(my-dir)
		include $(CLEAR_VARS)

		liblog_sources := logd_write.c
		liblog_sources := logd_write.c log_event_write.c

		# some files must not be compiled when building against Mingw
		# they correspond to features not used by our host development tools

liblog/log_event_write.c

0 → 100644

+88 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2015 The Android Open Source Project
		*
		* 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.
		*/

		#include <errno.h>
		#include <string.h>

		#include <log/log.h>
		#include <log/logger.h>

		#define MAX_EVENT_PAYLOAD 512
		#define MAX_SUBTAG_LEN 32

		static inline void copy4LE(uint8_t *buf, size_t pos, int val)
		{
		buf[pos] = val & 0xFF;
		buf[pos+1] = (val >> 8) & 0xFF;
		buf[pos+2] = (val >> 16) & 0xFF;
		buf[pos+3] = (val >> 24) & 0xFF;
		}

		int __android_log_error_write(int tag, const char subTag, int32_t uid, const char data,
		uint32_t dataLen)
		{
		uint8_t buf[MAX_EVENT_PAYLOAD];
		size_t pos = 0;
		uint32_t subTagLen = 0;
		uint32_t roomLeftForData = 0;

		if ((subTag == NULL) \|\| ((data == NULL) && (dataLen != 0))) return -EINVAL;

		subTagLen = strlen(subTag);

		// Truncate subtags that are too long.
		subTagLen = subTagLen > MAX_SUBTAG_LEN ? MAX_SUBTAG_LEN : subTagLen;

		// Truncate dataLen if it is too long.
		roomLeftForData = MAX_EVENT_PAYLOAD -
		(1 + // EVENT_TYPE_LIST
		1 + // Number of elements in list
		1 + // EVENT_TYPE_STRING
		sizeof(subTagLen) +
		subTagLen +
		1 + // EVENT_TYPE_INT
		sizeof(uid) +
		1 + // EVENT_TYPE_STRING
		sizeof(dataLen));
		dataLen = dataLen > roomLeftForData ? roomLeftForData : dataLen;

		buf[pos++] = EVENT_TYPE_LIST;
		buf[pos++] = 3; // Number of elements in the list (subTag, uid, data)

		// Write sub tag.
		buf[pos++] = EVENT_TYPE_STRING;
		copy4LE(buf, pos, subTagLen);
		pos += 4;
		memcpy(&buf[pos], subTag, subTagLen);
		pos += subTagLen;

		// Write UID.
		buf[pos++] = EVENT_TYPE_INT;
		copy4LE(buf, pos, uid);
		pos += 4;

		// Write data.
		buf[pos++] = EVENT_TYPE_STRING;
		copy4LE(buf, pos, dataLen);
		pos += 4;
		if (dataLen != 0)
		{
		memcpy(&buf[pos], data, dataLen);
		pos += dataLen;
		}

		return __android_log_bwrite(tag, buf, pos);
		}