1 /*
2 * Copyright (C) 2019 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #pragma once
18
19 #include <android-base/stringprintf.h>
20 #include <json/value.h>
21 #include <json/writer.h>
22
23 #ifdef ANDROID_BINDER_STATUS_H
24 #define IS_BINDER_OK(__ex__) (__ex__ == ::android::binder::Status::EX_NONE)
25
26 #define EXCEPTION_TO_STRING(__ex__, str) \
27 case ::android::binder::Status::__ex__: \
28 return str;
29
30 #define TO_EXCEPTION(__ex__) __ex__;
31
32 #else
33 #define IS_BINDER_OK(__ex__) (AStatus_isOk(AStatus_fromExceptionCode(__ex__)))
34
35 #define EXCEPTION_TO_STRING(__ex__, str) \
36 case __ex__: \
37 return str;
38
39 #define TO_EXCEPTION(__ex__) AStatus_getExceptionCode(AStatus_fromExceptionCode(__ex__));
40
41 #endif
42
exceptionToString(int32_t exception)43 std::string exceptionToString(int32_t exception) {
44 switch (exception) {
45 EXCEPTION_TO_STRING(EX_SECURITY, "SecurityException")
46 EXCEPTION_TO_STRING(EX_BAD_PARCELABLE, "BadParcelableException")
47 EXCEPTION_TO_STRING(EX_ILLEGAL_ARGUMENT, "IllegalArgumentException")
48 EXCEPTION_TO_STRING(EX_NULL_POINTER, "NullPointerException")
49 EXCEPTION_TO_STRING(EX_ILLEGAL_STATE, "IllegalStateException")
50 EXCEPTION_TO_STRING(EX_NETWORK_MAIN_THREAD, "NetworkMainThreadException")
51 EXCEPTION_TO_STRING(EX_UNSUPPORTED_OPERATION, "UnsupportedOperationException")
52 EXCEPTION_TO_STRING(EX_SERVICE_SPECIFIC, "ServiceSpecificException")
53 EXCEPTION_TO_STRING(EX_PARCELABLE, "ParcelableException")
54 EXCEPTION_TO_STRING(EX_TRANSACTION_FAILED, "TransactionFailedException")
55 default:
56 return "UnknownException";
57 }
58 }
59
60 using LogFn = std::function<void(const std::string& msg)>;
61
binderCallLogFn(const Json::Value & logTransaction,const LogFn & logFn)62 void binderCallLogFn(const Json::Value& logTransaction, const LogFn& logFn) {
63 using namespace std::string_literals;
64
65 bool hasReturnArgs;
66 std::string output;
67 const Json::Value& returnArgs = logTransaction["_aidl_return"];
68 const Json::Value& inputArgsArray = logTransaction["input_args"];
69
70 hasReturnArgs = !returnArgs.empty();
71 output.append(logTransaction["method_name"].asString() + "("s);
72
73 // input args
74 Json::FastWriter fastWriter;
75 fastWriter.omitEndingLineFeed();
76 for (Json::Value::ArrayIndex i = 0; i < inputArgsArray.size(); ++i) {
77 std::string value = fastWriter.write(inputArgsArray[i]["value"]);
78 output.append(value);
79 if (i != inputArgsArray.size() - 1) {
80 output.append(", "s);
81 }
82 }
83 output.append(")"s);
84
85 const int exceptionCode =
86 TO_EXCEPTION(logTransaction["binder_status"]["exception_code"].asInt());
87
88 if (hasReturnArgs || !IS_BINDER_OK(exceptionCode)) {
89 output.append(" -> "s);
90 }
91
92 // return status
93 if (!IS_BINDER_OK(exceptionCode)) {
94 // an exception occurred
95 const int errCode = logTransaction["binder_status"]["service_specific_error_code"].asInt();
96 output.append(::android::base::StringPrintf(
97 "%s(%d, \"%s\")", exceptionToString(exceptionCode).c_str(),
98 (errCode != 0) ? errCode : exceptionCode,
99 logTransaction["binder_status"]["exception_message"].asString().c_str()));
100 }
101 // return args
102 if (hasReturnArgs) {
103 output.append(::android::base::StringPrintf("{%s}", fastWriter.write(returnArgs).c_str()));
104 }
105 // duration time
106 output.append(
107 ::android::base::StringPrintf(" <%.2fms>", logTransaction["duration_ms"].asFloat()));
108 logFn(output);
109 }
110