1 /*
2 * Copyright (C) 2021 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 #include "src/trace_processor/prelude/functions/create_function_internal.h"
18
19 #include "perfetto/base/status.h"
20 #include "perfetto/ext/base/string_view.h"
21 #include "src/trace_processor/sqlite/sqlite_utils.h"
22 #include "src/trace_processor/util/status_macros.h"
23
24 namespace perfetto {
25 namespace trace_processor {
26
ParseFunctionName(base::StringView raw,base::StringView & out)27 base::Status ParseFunctionName(base::StringView raw, base::StringView& out) {
28 size_t function_name_end = raw.find('(');
29 if (function_name_end == base::StringView::npos)
30 return base::ErrStatus("unable to find bracket starting argument list");
31
32 base::StringView function_name = raw.substr(0, function_name_end);
33 if (!sql_argument::IsValidName(function_name)) {
34 return base::ErrStatus("function name %s is not alphanumeric",
35 function_name.ToStdString().c_str());
36 }
37 out = function_name;
38 return base::OkStatus();
39 }
40
ParsePrototype(base::StringView raw,Prototype & out)41 base::Status ParsePrototype(base::StringView raw, Prototype& out) {
42 // Examples of function prototypes:
43 // ANDROID_SDK_LEVEL()
44 // STARTUP_SLICE(dur_ns INT)
45 // FIND_NEXT_SLICE_WITH_NAME(ts INT, name STRING)
46
47 base::StringView function_name;
48 RETURN_IF_ERROR(ParseFunctionName(raw, function_name));
49
50 size_t function_name_end = function_name.size();
51 size_t args_start = function_name_end + 1;
52 size_t args_end = raw.find(')', args_start);
53 if (args_end == base::StringView::npos)
54 return base::ErrStatus("unable to find bracket ending argument list");
55
56 base::StringView args_str = raw.substr(args_start, args_end - args_start);
57 RETURN_IF_ERROR(sql_argument::ParseArgumentDefinitions(args_str.ToStdString(),
58 out.arguments));
59
60 out.function_name = function_name.ToStdString();
61 return base::OkStatus();
62 }
63
SqliteRetToStatus(sqlite3 * db,const std::string & function_name,int ret)64 base::Status SqliteRetToStatus(sqlite3* db,
65 const std::string& function_name,
66 int ret) {
67 if (ret != SQLITE_ROW && ret != SQLITE_DONE) {
68 return base::ErrStatus("%s: SQLite error while executing function body: %s",
69 function_name.c_str(), sqlite3_errmsg(db));
70 }
71 return base::OkStatus();
72 }
73
MaybeBindArgument(sqlite3_stmt * stmt,const std::string & function_name,const sql_argument::ArgumentDefinition & arg,sqlite3_value * value)74 base::Status MaybeBindArgument(sqlite3_stmt* stmt,
75 const std::string& function_name,
76 const sql_argument::ArgumentDefinition& arg,
77 sqlite3_value* value) {
78 int index = sqlite3_bind_parameter_index(stmt, arg.dollar_name().c_str());
79
80 // If the argument is not in the query, this just means its an unused
81 // argument which we can just ignore.
82 if (index == 0)
83 return base::Status();
84
85 int ret = sqlite3_bind_value(stmt, index, value);
86 if (ret != SQLITE_OK) {
87 return base::ErrStatus(
88 "%s: SQLite error while binding value to argument %s: %s",
89 function_name.c_str(), arg.name().c_str(),
90 sqlite3_errmsg(sqlite3_db_handle(stmt)));
91 }
92 return base::OkStatus();
93 }
94
95 } // namespace trace_processor
96 } // namespace perfetto
97