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Diffstat (limited to 'test/util/proc_util.cc')
-rw-r--r-- | test/util/proc_util.cc | 107 |
1 files changed, 0 insertions, 107 deletions
diff --git a/test/util/proc_util.cc b/test/util/proc_util.cc deleted file mode 100644 index 34d636ba9..000000000 --- a/test/util/proc_util.cc +++ /dev/null @@ -1,107 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// 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 "test/util/proc_util.h" - -#include <algorithm> -#include <iostream> -#include <vector> - -#include "absl/strings/ascii.h" -#include "absl/strings/str_cat.h" -#include "absl/strings/str_split.h" -#include "absl/strings/string_view.h" -#include "test/util/fs_util.h" -#include "test/util/test_util.h" - -namespace gvisor { -namespace testing { - -// Parses a single line from /proc/<xxx>/maps. -PosixErrorOr<ProcMapsEntry> ParseProcMapsLine(absl::string_view line) { - ProcMapsEntry map_entry = {}; - - // Limit splitting to 6 parts so that if there is a file path and it contains - // spaces, the file path is not split. - std::vector<std::string> parts = - absl::StrSplit(line, absl::MaxSplits(' ', 5), absl::SkipEmpty()); - - // parts.size() should be 6 if there is a file name specified, and 5 - // otherwise. - if (parts.size() < 5) { - return PosixError(EINVAL, absl::StrCat("Invalid line: ", line)); - } - - // Address range in the form X-X where X are hex values without leading 0x. - std::vector<std::string> addresses = absl::StrSplit(parts[0], '-'); - if (addresses.size() != 2) { - return PosixError(EINVAL, - absl::StrCat("Invalid address range: ", parts[0])); - } - ASSIGN_OR_RETURN_ERRNO(map_entry.start, AtoiBase(addresses[0], 16)); - ASSIGN_OR_RETURN_ERRNO(map_entry.end, AtoiBase(addresses[1], 16)); - - // Permissions are four bytes of the form rwxp or - if permission not set. - if (parts[1].size() != 4) { - return PosixError(EINVAL, - absl::StrCat("Invalid permission field: ", parts[1])); - } - - map_entry.readable = parts[1][0] == 'r'; - map_entry.writable = parts[1][1] == 'w'; - map_entry.executable = parts[1][2] == 'x'; - map_entry.priv = parts[1][3] == 'p'; - - ASSIGN_OR_RETURN_ERRNO(map_entry.offset, AtoiBase(parts[2], 16)); - - std::vector<std::string> device = absl::StrSplit(parts[3], ':'); - if (device.size() != 2) { - return PosixError(EINVAL, absl::StrCat("Invalid device: ", parts[3])); - } - ASSIGN_OR_RETURN_ERRNO(map_entry.major, AtoiBase(device[0], 16)); - ASSIGN_OR_RETURN_ERRNO(map_entry.minor, AtoiBase(device[1], 16)); - - ASSIGN_OR_RETURN_ERRNO(map_entry.inode, Atoi<int64_t>(parts[4])); - if (parts.size() == 6) { - // A filename is present. However, absl::StrSplit retained the whitespace - // between the inode number and the filename. - map_entry.filename = - std::string(absl::StripLeadingAsciiWhitespace(parts[5])); - } - - return map_entry; -} - -PosixErrorOr<std::vector<ProcMapsEntry>> ParseProcMaps( - absl::string_view contents) { - std::vector<ProcMapsEntry> entries; - auto lines = absl::StrSplit(contents, '\n', absl::SkipEmpty()); - for (const auto& l : lines) { - std::cout << "line: " << l << std::endl; - ASSIGN_OR_RETURN_ERRNO(auto entry, ParseProcMapsLine(l)); - entries.push_back(entry); - } - return entries; -} - -PosixErrorOr<bool> IsVsyscallEnabled() { - ASSIGN_OR_RETURN_ERRNO(auto contents, GetContents("/proc/self/maps")); - ASSIGN_OR_RETURN_ERRNO(auto maps, ParseProcMaps(contents)); - return std::any_of(maps.begin(), maps.end(), [](const ProcMapsEntry& e) { - return e.filename == "[vsyscall]"; - }); -} - -} // namespace testing -} // namespace gvisor |