Class DeathTestImpl

tests/gtest/gtest-all.cc:7994–8052

Provides cross platform implementation for some death functionality.

// Provides cross platform implementation for some death functionality.
class DeathTestImpl : public DeathTest {
 protected:
  DeathTestImpl(const char* a_statement, Matcher<const std::string&> matcher)
      : statement_(a_statement),
        matcher_(std::move(matcher)),
        spawned_(false),
        status_(-1),
        outcome_(IN_PROGRESS),
        read_fd_(-1),
        write_fd_(-1) {}

  // read_fd_ is expected to be closed and cleared by a derived class.
  ~DeathTestImpl() override { GTEST_DEATH_TEST_CHECK_(read_fd_ == -1); }

  void Abort(AbortReason reason) override;
  bool Passed(bool status_ok) override;

  const char* statement() const { return statement_; }
  bool spawned() const { return spawned_; }
  void set_spawned(bool is_spawned) { spawned_ = is_spawned; }
  int status() const { return status_; }
  void set_status(int a_status) { status_ = a_status; }
  DeathTestOutcome outcome() const { return outcome_; }
  void set_outcome(DeathTestOutcome an_outcome) { outcome_ = an_outcome; }
  int read_fd() const { return read_fd_; }
  void set_read_fd(int fd) { read_fd_ = fd; }
  int write_fd() const { return write_fd_; }
  void set_write_fd(int fd) { write_fd_ = fd; }

  // Called in the parent process only. Reads the result code of the death
  // test child process via a pipe, interprets it to set the outcome_
  // member, and closes read_fd_.  Outputs diagnostics and terminates in
  // case of unexpected codes.
  void ReadAndInterpretStatusByte();

  // Returns stderr output from the child process.
  virtual std::string GetErrorLogs();

 private:
  // The textual content of the code this object is testing.  This class
  // doesn't own this string and should not attempt to delete it.
  const char* const statement_;
  // A matcher that's expected to match the stderr output by the child process.
  Matcher<const std::string&> matcher_;
  // True if the death test child process has been successfully spawned.
  bool spawned_;
  // The exit status of the child process.
  int status_;
  // How the death test concluded.
  DeathTestOutcome outcome_;
  // Descriptor to the read end of the pipe to the child process.  It is
  // always -1 in the child process.  The child keeps its write end of the
  // pipe in write_fd_.
  int read_fd_;
  // Descriptor to the child's write end of the pipe to the parent process.
  // It is always -1 in the parent process.  The parent keeps its end of the
  // pipe in read_fd_.
  int write_fd_;