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Copy pathtest_usdt_args.cc
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100 lines (85 loc) · 3.24 KB
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/*
* Copyright (c) 2016 GitHub, Inc.
*
* 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 <iostream>
#include <string>
#include "catch.hpp"
#include "usdt.h"
using std::experimental::optional;
using std::experimental::nullopt;
static void verify_register(USDT::ArgumentParser_x64 &parser, int arg_size,
int constant) {
USDT::Argument arg;
REQUIRE(parser.parse(&arg));
REQUIRE(arg.arg_size() == arg_size);
REQUIRE(arg.constant());
REQUIRE(arg.constant() == constant);
}
static void verify_register(USDT::ArgumentParser_x64 &parser, int arg_size,
const std::string ®name,
optional<int> deref_offset = nullopt,
optional<std::string> deref_ident = nullopt,
optional<std::string> index_regname = nullopt,
optional<int> scale = nullopt) {
USDT::Argument arg;
REQUIRE(parser.parse(&arg));
REQUIRE(arg.arg_size() == arg_size);
REQUIRE(arg.base_register_name());
REQUIRE(arg.base_register_name() == regname);
REQUIRE(arg.deref_offset() == deref_offset);
REQUIRE(arg.deref_ident() == deref_ident);
REQUIRE(arg.index_register_name() == index_regname);
REQUIRE(arg.scale() == scale);
}
TEST_CASE("test usdt argument parsing", "[usdt]") {
SECTION("parse failure") {
USDT::ArgumentParser_x64 parser("4@i%ra+1r");
USDT::Argument arg;
REQUIRE(!parser.parse(&arg));
int i;
for (i = 0; i < 10 && !parser.done(); ++i) {
parser.parse(&arg);
}
// Make sure we reach termination
REQUIRE(i < 10);
}
SECTION("argument examples from the Python implementation") {
USDT::ArgumentParser_x64 parser(
"-4@$0 8@$1234 %rdi %rax %rsi "
"-8@%rbx 4@%r12 8@-8(%rbp) 4@(%rax) "
"-4@global_max_action(%rip) "
"8@24+mp_(%rip) "
"-4@CheckpointStats+40(%rip) "
"4@glob-2(%rip) "
"8@(%rax,%rdx,8) "
"4@(%rbx,%rcx)");
verify_register(parser, -4, 0);
verify_register(parser, 8, 1234);
verify_register(parser, 8, "di");
verify_register(parser, 8, "ax");
verify_register(parser, 8, "si");
verify_register(parser, -8, "bx");
verify_register(parser, 4, "r12");
verify_register(parser, 8, "bp", -8);
verify_register(parser, 4, "ax", 0);
verify_register(parser, -4, "ip", 0, std::string("global_max_action"));
verify_register(parser, 8, "ip", 24, std::string("mp_"));
verify_register(parser, -4, "ip", 40, std::string("CheckpointStats"));
verify_register(parser, 4, "ip", -2, std::string("glob"));
verify_register(parser, 8, "ax", 0, nullopt, std::string("dx"), 8);
verify_register(parser, 4, "bx", 0, nullopt, std::string("cx"));
REQUIRE(parser.done());
}
}