github.com/SagerNet/gvisor@v0.0.0-20210707092255-7731c139d75c/test/syscalls/linux/brk.cc (about)

     1  // Copyright 2018 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #include <stdint.h>
    16  #include <sys/syscall.h>
    17  #include <unistd.h>
    18  
    19  #include "test/util/test_util.h"
    20  
    21  namespace gvisor {
    22  namespace testing {
    23  
    24  TEST(BrkTest, BrkSyscallReturnsOldBrkOnFailure) {
    25    auto old_brk = sbrk(0);
    26    EXPECT_THAT(syscall(SYS_brk, reinterpret_cast<void*>(-1)),
    27                SyscallSucceedsWithValue(reinterpret_cast<uintptr_t>(old_brk)));
    28  }
    29  
    30  }  // namespace testing
    31  }  // namespace gvisor