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Diffstat (limited to 'test/util/signal_util.h')
-rw-r--r-- | test/util/signal_util.h | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/test/util/signal_util.h b/test/util/signal_util.h deleted file mode 100644 index 7fd2af015..000000000 --- a/test/util/signal_util.h +++ /dev/null @@ -1,92 +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. - -#ifndef GVISOR_TEST_UTIL_SIGNAL_UTIL_H_ -#define GVISOR_TEST_UTIL_SIGNAL_UTIL_H_ - -#include <signal.h> -#include <sys/syscall.h> -#include <unistd.h> -#include <ostream> - -#include "gmock/gmock.h" -#include "test/util/cleanup.h" -#include "test/util/posix_error.h" - -// Format a sigset_t as a comma separated list of numeric ranges. -::std::ostream& operator<<(::std::ostream& os, const sigset_t& sigset); - -namespace gvisor { -namespace testing { - -// The maximum signal number. -static constexpr int kMaxSignal = 64; - -// Wrapper for the tgkill(2) syscall, which glibc does not provide. -inline int tgkill(pid_t tgid, pid_t tid, int sig) { - return syscall(__NR_tgkill, tgid, tid, sig); -} - -// Installs the passed sigaction and returns a cleanup function to restore the -// previous handler when it goes out of scope. -PosixErrorOr<Cleanup> ScopedSigaction(int sig, struct sigaction const& sa); - -// Updates the signal mask as per sigprocmask(2) and returns a cleanup function -// to restore the previous signal mask when it goes out of scope. -PosixErrorOr<Cleanup> ScopedSignalMask(int how, sigset_t const& set); - -// ScopedSignalMask variant that creates a mask of the single signal 'sig'. -inline PosixErrorOr<Cleanup> ScopedSignalMask(int how, int sig) { - sigset_t set; - sigemptyset(&set); - sigaddset(&set, sig); - return ScopedSignalMask(how, set); -} - -// Asserts equality of two sigset_t values. -MATCHER_P(EqualsSigset, value, "equals " + ::testing::PrintToString(value)) { - for (int sig = 1; sig <= kMaxSignal; ++sig) { - if (sigismember(&arg, sig) != sigismember(&value, sig)) { - return false; - } - } - return true; -} - -#ifdef __x86_64__ -// Fault can be used to generate a synchronous SIGSEGV. -// -// This fault can be fixed up in a handler via fixup, below. -inline void Fault() { - // Zero and dereference %ax. - asm("movabs $0, %%rax\r\n" - "mov 0(%%rax), %%rax\r\n" - : - : - : "ax"); -} - -// FixupFault fixes up a fault generated by fault, above. -inline void FixupFault(ucontext_t* ctx) { - // Skip the bad instruction above. - // - // The encoding is 0x48 0xab 0x00. - ctx->uc_mcontext.gregs[REG_RIP] += 3; -} -#endif - -} // namespace testing -} // namespace gvisor - -#endif // GVISOR_TEST_UTIL_SIGNAL_UTIL_H_ |