Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 489 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Host/common/Socket.cpp b/gnu/llvm/lldb/source/Host/common/Socket.cpp
new file mode 100644
index 00000000000..7fba1daff75
--- /dev/null
+++ b/gnu/llvm/lldb/source/Host/common/Socket.cpp
@@ -0,0 +1,489 @@
+//===-- Socket.cpp ----------------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Host/Socket.h"
+
+#include "lldb/Host/Config.h"
+#include "lldb/Host/Host.h"
+#include "lldb/Host/SocketAddress.h"
+#include "lldb/Host/StringConvert.h"
+#include "lldb/Host/common/TCPSocket.h"
+#include "lldb/Host/common/UDPSocket.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/RegularExpression.h"
+
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/Errno.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/WindowsError.h"
+
+#if LLDB_ENABLE_POSIX
+#include "lldb/Host/posix/DomainSocket.h"
+
+#include <arpa/inet.h>
+#include <netdb.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#endif
+
+#ifdef __linux__
+#include "lldb/Host/linux/AbstractSocket.h"
+#endif
+
+#ifdef __ANDROID__
+#include <arpa/inet.h>
+#include <asm-generic/errno-base.h>
+#include <errno.h>
+#include <linux/tcp.h>
+#include <fcntl.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#endif // __ANDROID__
+
+using namespace lldb;
+using namespace lldb_private;
+
+#if defined(_WIN32)
+typedef const char *set_socket_option_arg_type;
+typedef char *get_socket_option_arg_type;
+const NativeSocket Socket::kInvalidSocketValue = INVALID_SOCKET;
+#else  // #if defined(_WIN32)
+typedef const void *set_socket_option_arg_type;
+typedef void *get_socket_option_arg_type;
+const NativeSocket Socket::kInvalidSocketValue = -1;
+#endif // #if defined(_WIN32)
+
+namespace {
+
+bool IsInterrupted() {
+#if defined(_WIN32)
+  return ::WSAGetLastError() == WSAEINTR;
+#else
+  return errno == EINTR;
+#endif
+}
+}
+
+Socket::Socket(SocketProtocol protocol, bool should_close,
+               bool child_processes_inherit)
+    : IOObject(eFDTypeSocket), m_protocol(protocol),
+      m_socket(kInvalidSocketValue),
+      m_child_processes_inherit(child_processes_inherit),
+      m_should_close_fd(should_close) {}
+
+Socket::~Socket() { Close(); }
+
+llvm::Error Socket::Initialize() {
+#if defined(_WIN32)
+  auto wVersion = WINSOCK_VERSION;
+  WSADATA wsaData;
+  int err = ::WSAStartup(wVersion, &wsaData);
+  if (err == 0) {
+    if (wsaData.wVersion < wVersion) {
+      WSACleanup();
+      return llvm::make_error<llvm::StringError>(
+          "WSASock version is not expected.", llvm::inconvertibleErrorCode());
+    }
+  } else {
+    return llvm::errorCodeToError(llvm::mapWindowsError(::WSAGetLastError()));
+  }
+#endif
+
+  return llvm::Error::success();
+}
+
+void Socket::Terminate() {
+#if defined(_WIN32)
+  ::WSACleanup();
+#endif
+}
+
+std::unique_ptr<Socket> Socket::Create(const SocketProtocol protocol,
+                                       bool child_processes_inherit,
+                                       Status &error) {
+  error.Clear();
+
+  std::unique_ptr<Socket> socket_up;
+  switch (protocol) {
+  case ProtocolTcp:
+    socket_up =
+        std::make_unique<TCPSocket>(true, child_processes_inherit);
+    break;
+  case ProtocolUdp:
+    socket_up =
+        std::make_unique<UDPSocket>(true, child_processes_inherit);
+    break;
+  case ProtocolUnixDomain:
+#if LLDB_ENABLE_POSIX
+    socket_up =
+        std::make_unique<DomainSocket>(true, child_processes_inherit);
+#else
+    error.SetErrorString(
+        "Unix domain sockets are not supported on this platform.");
+#endif
+    break;
+  case ProtocolUnixAbstract:
+#ifdef __linux__
+    socket_up =
+        std::make_unique<AbstractSocket>(child_processes_inherit);
+#else
+    error.SetErrorString(
+        "Abstract domain sockets are not supported on this platform.");
+#endif
+    break;
+  }
+
+  if (error.Fail())
+    socket_up.reset();
+
+  return socket_up;
+}
+
+Status Socket::TcpConnect(llvm::StringRef host_and_port,
+                          bool child_processes_inherit, Socket *&socket) {
+  Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_COMMUNICATION));
+  LLDB_LOGF(log, "Socket::%s (host/port = %s)", __FUNCTION__,
+            host_and_port.str().c_str());
+
+  Status error;
+  std::unique_ptr<Socket> connect_socket(
+      Create(ProtocolTcp, child_processes_inherit, error));
+  if (error.Fail())
+    return error;
+
+  error = connect_socket->Connect(host_and_port);
+  if (error.Success())
+    socket = connect_socket.release();
+
+  return error;
+}
+
+Status Socket::TcpListen(llvm::StringRef host_and_port,
+                         bool child_processes_inherit, Socket *&socket,
+                         Predicate<uint16_t> *predicate, int backlog) {
+  Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_CONNECTION));
+  LLDB_LOGF(log, "Socket::%s (%s)", __FUNCTION__, host_and_port.str().c_str());
+
+  Status error;
+  std::string host_str;
+  std::string port_str;
+  int32_t port = INT32_MIN;
+  if (!DecodeHostAndPort(host_and_port, host_str, port_str, port, &error))
+    return error;
+
+  std::unique_ptr<TCPSocket> listen_socket(
+      new TCPSocket(true, child_processes_inherit));
+  if (error.Fail())
+    return error;
+
+  error = listen_socket->Listen(host_and_port, backlog);
+  if (error.Success()) {
+    // We were asked to listen on port zero which means we must now read the
+    // actual port that was given to us as port zero is a special code for
+    // "find an open port for me".
+    if (port == 0)
+      port = listen_socket->GetLocalPortNumber();
+
+    // Set the port predicate since when doing a listen://<host>:<port> it
+    // often needs to accept the incoming connection which is a blocking system
+    // call. Allowing access to the bound port using a predicate allows us to
+    // wait for the port predicate to be set to a non-zero value from another
+    // thread in an efficient manor.
+    if (predicate)
+      predicate->SetValue(port, eBroadcastAlways);
+    socket = listen_socket.release();
+  }
+
+  return error;
+}
+
+Status Socket::UdpConnect(llvm::StringRef host_and_port,
+                          bool child_processes_inherit, Socket *&socket) {
+  Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_CONNECTION));
+  LLDB_LOGF(log, "Socket::%s (host/port = %s)", __FUNCTION__,
+            host_and_port.str().c_str());
+
+  return UDPSocket::Connect(host_and_port, child_processes_inherit, socket);
+}
+
+Status Socket::UnixDomainConnect(llvm::StringRef name,
+                                 bool child_processes_inherit,
+                                 Socket *&socket) {
+  Status error;
+  std::unique_ptr<Socket> connect_socket(
+      Create(ProtocolUnixDomain, child_processes_inherit, error));
+  if (error.Fail())
+    return error;
+
+  error = connect_socket->Connect(name);
+  if (error.Success())
+    socket = connect_socket.release();
+
+  return error;
+}
+
+Status Socket::UnixDomainAccept(llvm::StringRef name,
+                                bool child_processes_inherit, Socket *&socket) {
+  Status error;
+  std::unique_ptr<Socket> listen_socket(
+      Create(ProtocolUnixDomain, child_processes_inherit, error));
+  if (error.Fail())
+    return error;
+
+  error = listen_socket->Listen(name, 5);
+  if (error.Fail())
+    return error;
+
+  error = listen_socket->Accept(socket);
+  return error;
+}
+
+Status Socket::UnixAbstractConnect(llvm::StringRef name,
+                                   bool child_processes_inherit,
+                                   Socket *&socket) {
+  Status error;
+  std::unique_ptr<Socket> connect_socket(
+      Create(ProtocolUnixAbstract, child_processes_inherit, error));
+  if (error.Fail())
+    return error;
+
+  error = connect_socket->Connect(name);
+  if (error.Success())
+    socket = connect_socket.release();
+  return error;
+}
+
+Status Socket::UnixAbstractAccept(llvm::StringRef name,
+                                  bool child_processes_inherit,
+                                  Socket *&socket) {
+  Status error;
+  std::unique_ptr<Socket> listen_socket(
+      Create(ProtocolUnixAbstract, child_processes_inherit, error));
+  if (error.Fail())
+    return error;
+
+  error = listen_socket->Listen(name, 5);
+  if (error.Fail())
+    return error;
+
+  error = listen_socket->Accept(socket);
+  return error;
+}
+
+bool Socket::DecodeHostAndPort(llvm::StringRef host_and_port,
+                               std::string &host_str, std::string &port_str,
+                               int32_t &port, Status *error_ptr) {
+  static RegularExpression g_regex(
+      llvm::StringRef("([^:]+|\\[[0-9a-fA-F:]+.*\\]):([0-9]+)"));
+  llvm::SmallVector<llvm::StringRef, 3> matches;
+  if (g_regex.Execute(host_and_port, &matches)) {
+    host_str = matches[1].str();
+    port_str = matches[2].str();
+    // IPv6 addresses are wrapped in [] when specified with ports
+    if (host_str.front() == '[' && host_str.back() == ']')
+      host_str = host_str.substr(1, host_str.size() - 2);
+    bool ok = false;
+    port = StringConvert::ToUInt32(port_str.c_str(), UINT32_MAX, 10, &ok);
+    if (ok && port <= UINT16_MAX) {
+      if (error_ptr)
+        error_ptr->Clear();
+      return true;
+    }
+    // port is too large
+    if (error_ptr)
+      error_ptr->SetErrorStringWithFormat(
+          "invalid host:port specification: '%s'", host_and_port.str().c_str());
+    return false;
+  }
+
+  // If this was unsuccessful, then check if it's simply a signed 32-bit
+  // integer, representing a port with an empty host.
+  host_str.clear();
+  port_str.clear();
+  if (to_integer(host_and_port, port, 10) && port < UINT16_MAX) {
+    port_str = host_and_port;
+    if (error_ptr)
+      error_ptr->Clear();
+    return true;
+  }
+
+  if (error_ptr)
+    error_ptr->SetErrorStringWithFormat("invalid host:port specification: '%s'",
+                                        host_and_port.str().c_str());
+  return false;
+}
+
+IOObject::WaitableHandle Socket::GetWaitableHandle() {
+  // TODO: On Windows, use WSAEventSelect
+  return m_socket;
+}
+
+Status Socket::Read(void *buf, size_t &num_bytes) {
+  Status error;
+  int bytes_received = 0;
+  do {
+    bytes_received = ::recv(m_socket, static_cast<char *>(buf), num_bytes, 0);
+  } while (bytes_received < 0 && IsInterrupted());
+
+  if (bytes_received < 0) {
+    SetLastError(error);
+    num_bytes = 0;
+  } else
+    num_bytes = bytes_received;
+
+  Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_COMMUNICATION));
+  if (log) {
+    LLDB_LOGF(log,
+              "%p Socket::Read() (socket = %" PRIu64
+              ", src = %p, src_len = %" PRIu64 ", flags = 0) => %" PRIi64
+              " (error = %s)",
+              static_cast<void *>(this), static_cast<uint64_t>(m_socket), buf,
+              static_cast<uint64_t>(num_bytes),
+              static_cast<int64_t>(bytes_received), error.AsCString());
+  }
+
+  return error;
+}
+
+Status Socket::Write(const void *buf, size_t &num_bytes) {
+  const size_t src_len = num_bytes;
+  Status error;
+  int bytes_sent = 0;
+  do {
+    bytes_sent = Send(buf, num_bytes);
+  } while (bytes_sent < 0 && IsInterrupted());
+
+  if (bytes_sent < 0) {
+    SetLastError(error);
+    num_bytes = 0;
+  } else
+    num_bytes = bytes_sent;
+
+  Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_COMMUNICATION));
+  if (log) {
+    LLDB_LOGF(log,
+              "%p Socket::Write() (socket = %" PRIu64
+              ", src = %p, src_len = %" PRIu64 ", flags = 0) => %" PRIi64
+              " (error = %s)",
+              static_cast<void *>(this), static_cast<uint64_t>(m_socket), buf,
+              static_cast<uint64_t>(src_len),
+              static_cast<int64_t>(bytes_sent), error.AsCString());
+  }
+
+  return error;
+}
+
+Status Socket::PreDisconnect() {
+  Status error;
+  return error;
+}
+
+Status Socket::Close() {
+  Status error;
+  if (!IsValid() || !m_should_close_fd)
+    return error;
+
+  Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_CONNECTION));
+  LLDB_LOGF(log, "%p Socket::Close (fd = %" PRIu64 ")",
+            static_cast<void *>(this), static_cast<uint64_t>(m_socket));
+
+#if defined(_WIN32)
+  bool success = !!closesocket(m_socket);
+#else
+  bool success = !!::close(m_socket);
+#endif
+  // A reference to a FD was passed in, set it to an invalid value
+  m_socket = kInvalidSocketValue;
+  if (!success) {
+    SetLastError(error);
+  }
+
+  return error;
+}
+
+int Socket::GetOption(int level, int option_name, int &option_value) {
+  get_socket_option_arg_type option_value_p =
+      reinterpret_cast<get_socket_option_arg_type>(&option_value);
+  socklen_t option_value_size = sizeof(int);
+  return ::getsockopt(m_socket, level, option_name, option_value_p,
+                      &option_value_size);
+}
+
+int Socket::SetOption(int level, int option_name, int option_value) {
+  set_socket_option_arg_type option_value_p =
+      reinterpret_cast<get_socket_option_arg_type>(&option_value);
+  return ::setsockopt(m_socket, level, option_name, option_value_p,
+                      sizeof(option_value));
+}
+
+size_t Socket::Send(const void *buf, const size_t num_bytes) {
+  return ::send(m_socket, static_cast<const char *>(buf), num_bytes, 0);
+}
+
+void Socket::SetLastError(Status &error) {
+#if defined(_WIN32)
+  error.SetError(::WSAGetLastError(), lldb::eErrorTypeWin32);
+#else
+  error.SetErrorToErrno();
+#endif
+}
+
+NativeSocket Socket::CreateSocket(const int domain, const int type,
+                                  const int protocol,
+                                  bool child_processes_inherit, Status &error) {
+  error.Clear();
+  auto socket_type = type;
+#ifdef SOCK_CLOEXEC
+  if (!child_processes_inherit)
+    socket_type |= SOCK_CLOEXEC;
+#endif
+  auto sock = ::socket(domain, socket_type, protocol);
+  if (sock == kInvalidSocketValue)
+    SetLastError(error);
+
+  return sock;
+}
+
+NativeSocket Socket::AcceptSocket(NativeSocket sockfd, struct sockaddr *addr,
+                                  socklen_t *addrlen,
+                                  bool child_processes_inherit, Status &error) {
+  error.Clear();
+#if defined(ANDROID_USE_ACCEPT_WORKAROUND)
+  // Hack:
+  // This enables static linking lldb-server to an API 21 libc, but still
+  // having it run on older devices. It is necessary because API 21 libc's
+  // implementation of accept() uses the accept4 syscall(), which is not
+  // available in older kernels. Using an older libc would fix this issue, but
+  // introduce other ones, as the old libraries were quite buggy.
+  int fd = syscall(__NR_accept, sockfd, addr, addrlen);
+  if (fd >= 0 && !child_processes_inherit) {
+    int flags = ::fcntl(fd, F_GETFD);
+    if (flags != -1 && ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC) != -1)
+      return fd;
+    SetLastError(error);
+    close(fd);
+  }
+  return fd;
+#elif defined(SOCK_CLOEXEC) && defined(HAVE_ACCEPT4)
+  int flags = 0;
+  if (!child_processes_inherit) {
+    flags |= SOCK_CLOEXEC;
+  }
+  NativeSocket fd = llvm::sys::RetryAfterSignal(
+      static_cast<NativeSocket>(-1), ::accept4, sockfd, addr, addrlen, flags);
+#else
+  NativeSocket fd = llvm::sys::RetryAfterSignal(
+      static_cast<NativeSocket>(-1), ::accept, sockfd, addr, addrlen);
+#endif
+  if (fd == kInvalidSocketValue)
+    SetLastError(error);
+  return fd;
+}