mirror of
https://github.com/google/sandboxed-api.git
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129 lines
3.1 KiB
C++
129 lines
3.1 KiB
C++
// Copyright 2019 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// A binary that exits via different modes: crashes, causes violation, exits
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// normally or times out, to test the stack tracing symbolizer.
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#include <syscall.h>
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#include <unistd.h>
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#include <cstdlib>
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#include "absl/base/attributes.h"
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#include "absl/strings/numbers.h"
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#include "sandboxed_api/sandbox2/testcases/symbolize_lib.h"
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#include "sandboxed_api/util/raw_logging.h"
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// Sometimes we don't have debug info to properly unwind through libc (a frame
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// is skipped).
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// Workaround by putting another frame on the call stack.
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template <typename F>
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ABSL_ATTRIBUTE_NOINLINE ABSL_ATTRIBUTE_NO_TAIL_CALL void IndirectLibcCall(
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F func) {
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func();
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}
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ABSL_ATTRIBUTE_NOINLINE
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void CrashMe(char x = 0) {
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volatile char* null = nullptr;
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*null = x;
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}
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ABSL_ATTRIBUTE_NOINLINE
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ABSL_ATTRIBUTE_NO_TAIL_CALL
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void ViolatePolicy(int x = 0) {
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IndirectLibcCall([x]() { syscall(__NR_ptrace, x); });
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}
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ABSL_ATTRIBUTE_NOINLINE
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ABSL_ATTRIBUTE_NO_TAIL_CALL
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void ExitNormally(int x = 0) {
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IndirectLibcCall([x]() {
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// _exit is marked noreturn, which makes stack traces a bit trickier -
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// work around by using a volatile read
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if (volatile int y = 1) {
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_exit(x);
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}
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});
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}
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ABSL_ATTRIBUTE_NOINLINE
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ABSL_ATTRIBUTE_NO_TAIL_CALL
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void SleepForXSeconds(int x = 0) {
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IndirectLibcCall([x]() { sleep(x); });
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}
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ABSL_ATTRIBUTE_NOINLINE
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ABSL_ATTRIBUTE_NO_TAIL_CALL
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void RunTest(int testno) {
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switch (testno) {
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case 1:
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CrashMe();
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break;
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case 2:
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ViolatePolicy();
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break;
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case 3:
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ExitNormally();
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break;
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case 4:
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SleepForXSeconds(10);
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break;
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default:
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SAPI_RAW_LOG(FATAL, "Unknown test case: %d", testno);
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}
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}
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ABSL_ATTRIBUTE_NOINLINE
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ABSL_ATTRIBUTE_NO_TAIL_CALL
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void RecurseA(int testno, int n);
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ABSL_ATTRIBUTE_NOINLINE
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ABSL_ATTRIBUTE_NO_TAIL_CALL
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void RecurseB(int testno, int n) {
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if (n > 1) {
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return RecurseA(testno, n - 1);
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}
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return RunTest(testno);
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}
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void RecurseA(int testno, int n) {
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if (n > 1) {
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return RecurseB(testno, n - 1);
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}
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return RunTest(testno);
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}
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int main(int argc, char* argv[]) {
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SAPI_RAW_CHECK(argc >= 3, "Not enough arguments");
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int testno;
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int testmode;
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SAPI_RAW_CHECK(absl::SimpleAtoi(argv[1], &testno), "testno not a number");
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SAPI_RAW_CHECK(absl::SimpleAtoi(argv[2], &testmode), "testmode not a number");
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switch (testmode) {
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case 1:
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RunTest(testno);
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break;
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case 2:
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RecurseA(testno, 10);
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break;
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case 3:
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LibRecurse(&RunTest, testno, 10);
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break;
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default:
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SAPI_RAW_LOG(FATAL, "Unknown test mode: %d", testmode);
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}
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return EXIT_SUCCESS;
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}
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