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test_usdt_args.cc
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test_usdt_args.cc
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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:https://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 &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 &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);
}
/* supported arches only */
#if defined(__aarch64__) || defined(__powerpc64__) || \
defined(__s390x__) || defined(__x86_64__)
TEST_CASE("test usdt argument parsing", "[usdt]") {
SECTION("parse failure") {
#ifdef __aarch64__
USDT::ArgumentParser_aarch64 parser("4@[x32,200]");
#elif __powerpc64__
USDT::ArgumentParser_powerpc64 parser("4@-12(42)");
#elif __s390x__
USDT::ArgumentParser_s390x parser("4@-12(%r42)");
#elif defined(__x86_64__)
USDT::ArgumentParser_x64 parser("4@i%ra+1r");
#endif
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") {
#ifdef __aarch64__
USDT::ArgumentParser_aarch64 parser(
"-1@x0 4@5 8@[x12] -4@[x30,-40] -4@[x31,-40] 8@[sp, 120]");
verify_register(parser, -1, "regs[0]");
verify_register(parser, 4, 5);
verify_register(parser, 8, "regs[12]", 0);
verify_register(parser, -4, "regs[30]", -40);
verify_register(parser, -4, "sp", -40);
verify_register(parser, 8, "sp", 120);
#elif __powerpc64__
USDT::ArgumentParser_powerpc64 parser(
"-4@0 8@%r0 8@i0 4@0(%r0) -2@0(0) "
"1@0 -2@%r3 -8@i9 -1@0(%r4) -4@16(6) "
"2@7 4@%r11 4@i-67 8@-16(%r17) 1@-52(11) "
"-8@13 -8@%r25 2@i-11 -2@14(%r26) -8@-32(24) "
"4@29 2@%r17 -8@i-693 -1@-23(%r31) 4@28(30) "
"-2@31 -4@%r30 2@i1097 4@108(%r30) -2@-4(31)");
verify_register(parser, -4, "gpr[0]");
verify_register(parser, 8, "gpr[0]");
verify_register(parser, 8, 0);
verify_register(parser, 4, "gpr[0]", 0);
verify_register(parser, -2, "gpr[0]", 0);
verify_register(parser, 1, "gpr[0]");
verify_register(parser, -2, "gpr[3]");
verify_register(parser, -8, 9);
verify_register(parser, -1, "gpr[4]", 0);
verify_register(parser, -4, "gpr[6]", 16);
verify_register(parser, 2, "gpr[7]");
verify_register(parser, 4, "gpr[11]");
verify_register(parser, 4, -67);
verify_register(parser, 8, "gpr[17]", -16);
verify_register(parser, 1, "gpr[11]", -52);
verify_register(parser, -8, "gpr[13]");
verify_register(parser, -8, "gpr[25]");
verify_register(parser, 2, -11);
verify_register(parser, -2, "gpr[26]", 14);
verify_register(parser, -8, "gpr[24]", -32);
verify_register(parser, 4, "gpr[29]");
verify_register(parser, 2, "gpr[17]");
verify_register(parser, -8, -693);
verify_register(parser, -1, "gpr[31]", -23);
verify_register(parser, 4, "gpr[30]", 28);
verify_register(parser, -2, "gpr[31]");
verify_register(parser, -4, "gpr[30]");
verify_register(parser, 2, 1097);
verify_register(parser, 4, "gpr[30]", 108);
verify_register(parser, -2, "gpr[31]", -4);
#elif __s390x__
USDT::ArgumentParser_s390x parser(
"-4@%r0 8@%r0 8@0 4@0(%r0) -2@0(%r0) "
"1@%r0 -2@%r3 -8@9 -1@0(%r4) -4@16(%r6) "
"2@%r7 4@%r11 4@-67 8@-16(%r15) 1@-52(%r11) "
"-8@%r4 -8@%r14 2@-11 -2@14(%r13) -8@-32(%r12) "
"4@%r5 2@%r11 -8@-693 -1@-23(%r10) 4@28(%r9) "
"-2@%r3 -4@%r8 2@1097 4@108(%r7) -2@-4(%r6)");
verify_register(parser, -4, "gprs[0]");
verify_register(parser, 8, "gprs[0]");
verify_register(parser, 8, 0);
verify_register(parser, 4, "gprs[0]", 0);
verify_register(parser, -2, "gprs[0]", 0);
verify_register(parser, 1, "gprs[0]");
verify_register(parser, -2, "gprs[3]");
verify_register(parser, -8, 9);
verify_register(parser, -1, "gprs[4]", 0);
verify_register(parser, -4, "gprs[6]", 16);
verify_register(parser, 2, "gprs[7]");
verify_register(parser, 4, "gprs[11]");
verify_register(parser, 4, -67);
verify_register(parser, 8, "gprs[15]", -16);
verify_register(parser, 1, "gprs[11]", -52);
verify_register(parser, -8, "gprs[4]");
verify_register(parser, -8, "gprs[14]");
verify_register(parser, 2, -11);
verify_register(parser, -2, "gprs[13]", 14);
verify_register(parser, -8, "gprs[12]", -32);
verify_register(parser, 4, "gprs[5]");
verify_register(parser, 2, "gprs[11]");
verify_register(parser, -8, -693);
verify_register(parser, -1, "gprs[10]", -23);
verify_register(parser, 4, "gprs[9]", 28);
verify_register(parser, -2, "gprs[3]");
verify_register(parser, -4, "gprs[8]");
verify_register(parser, 2, 1097);
verify_register(parser, 4, "gprs[7]", 108);
verify_register(parser, -2, "gprs[6]", -4);
#elif defined(__x86_64__)
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"));
#endif
REQUIRE(parser.done());
}
}
#endif /* supported arches only */