forked from OSchip/llvm-project
378 lines
12 KiB
C++
378 lines
12 KiB
C++
//===-- lldb-platform.cpp ---------------------------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include <errno.h>
|
|
#if defined(__APPLE__)
|
|
#include <netinet/in.h>
|
|
#endif
|
|
#include <signal.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include <fstream>
|
|
|
|
#include "llvm/Support/FileSystem.h"
|
|
#include "llvm/Support/FileUtilities.h"
|
|
|
|
#include "Acceptor.h"
|
|
#include "LLDBServerUtilities.h"
|
|
#include "Plugins/Process/gdb-remote/GDBRemoteCommunicationServerPlatform.h"
|
|
#include "Plugins/Process/gdb-remote/ProcessGDBRemoteLog.h"
|
|
#include "lldb/Host/ConnectionFileDescriptor.h"
|
|
#include "lldb/Host/HostGetOpt.h"
|
|
#include "lldb/Host/OptionParser.h"
|
|
#include "lldb/Host/common/TCPSocket.h"
|
|
#include "lldb/Utility/FileSpec.h"
|
|
#include "lldb/Utility/Status.h"
|
|
|
|
using namespace lldb;
|
|
using namespace lldb_private;
|
|
using namespace lldb_private::lldb_server;
|
|
using namespace lldb_private::process_gdb_remote;
|
|
using namespace llvm;
|
|
|
|
//----------------------------------------------------------------------
|
|
// option descriptors for getopt_long_only()
|
|
//----------------------------------------------------------------------
|
|
|
|
static int g_debug = 0;
|
|
static int g_verbose = 0;
|
|
static int g_server = 0;
|
|
|
|
static struct option g_long_options[] = {
|
|
{"debug", no_argument, &g_debug, 1},
|
|
{"verbose", no_argument, &g_verbose, 1},
|
|
{"log-file", required_argument, NULL, 'l'},
|
|
{"log-channels", required_argument, NULL, 'c'},
|
|
{"listen", required_argument, NULL, 'L'},
|
|
{"port-offset", required_argument, NULL, 'p'},
|
|
{"gdbserver-port", required_argument, NULL, 'P'},
|
|
{"min-gdbserver-port", required_argument, NULL, 'm'},
|
|
{"max-gdbserver-port", required_argument, NULL, 'M'},
|
|
{"socket-file", required_argument, NULL, 'f'},
|
|
{"server", no_argument, &g_server, 1},
|
|
{NULL, 0, NULL, 0}};
|
|
|
|
#if defined(__APPLE__)
|
|
#define LOW_PORT (IPPORT_RESERVED)
|
|
#define HIGH_PORT (IPPORT_HIFIRSTAUTO)
|
|
#else
|
|
#define LOW_PORT (1024u)
|
|
#define HIGH_PORT (49151u)
|
|
#endif
|
|
|
|
//----------------------------------------------------------------------
|
|
// Watch for signals
|
|
//----------------------------------------------------------------------
|
|
static void signal_handler(int signo) {
|
|
switch (signo) {
|
|
case SIGHUP:
|
|
// Use SIGINT first, if that does not work, use SIGHUP as a last resort.
|
|
// And we should not call exit() here because it results in the global
|
|
// destructors
|
|
// to be invoked and wreaking havoc on the threads still running.
|
|
Host::SystemLog(Host::eSystemLogWarning,
|
|
"SIGHUP received, exiting lldb-server...\n");
|
|
abort();
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void display_usage(const char *progname, const char *subcommand) {
|
|
fprintf(stderr, "Usage:\n %s %s [--log-file log-file-name] [--log-channels "
|
|
"log-channel-list] [--port-file port-file-path] --server "
|
|
"--listen port\n",
|
|
progname, subcommand);
|
|
exit(0);
|
|
}
|
|
|
|
static Status save_socket_id_to_file(const std::string &socket_id,
|
|
const FileSpec &file_spec) {
|
|
FileSpec temp_file_spec(file_spec.GetDirectory().AsCString());
|
|
Status error(llvm::sys::fs::create_directory(temp_file_spec.GetPath()));
|
|
if (error.Fail())
|
|
return Status("Failed to create directory %s: %s",
|
|
temp_file_spec.GetCString(), error.AsCString());
|
|
|
|
llvm::SmallString<64> temp_file_path;
|
|
temp_file_spec.AppendPathComponent("port-file.%%%%%%");
|
|
int FD;
|
|
auto err_code = llvm::sys::fs::createUniqueFile(temp_file_spec.GetPath(), FD,
|
|
temp_file_path);
|
|
if (err_code)
|
|
return Status("Failed to create temp file: %s", err_code.message().c_str());
|
|
|
|
llvm::FileRemover tmp_file_remover(temp_file_path);
|
|
|
|
{
|
|
llvm::raw_fd_ostream temp_file(FD, true);
|
|
temp_file << socket_id;
|
|
temp_file.close();
|
|
if (temp_file.has_error())
|
|
return Status("Failed to write to port file.");
|
|
}
|
|
|
|
err_code = llvm::sys::fs::rename(temp_file_path, file_spec.GetPath());
|
|
if (err_code)
|
|
return Status("Failed to rename file %s to %s: %s", temp_file_path.c_str(),
|
|
file_spec.GetPath().c_str(), err_code.message().c_str());
|
|
|
|
tmp_file_remover.releaseFile();
|
|
return Status();
|
|
}
|
|
|
|
//----------------------------------------------------------------------
|
|
// main
|
|
//----------------------------------------------------------------------
|
|
int main_platform(int argc, char *argv[]) {
|
|
const char *progname = argv[0];
|
|
const char *subcommand = argv[1];
|
|
argc--;
|
|
argv++;
|
|
signal(SIGPIPE, SIG_IGN);
|
|
signal(SIGHUP, signal_handler);
|
|
int long_option_index = 0;
|
|
Status error;
|
|
std::string listen_host_port;
|
|
int ch;
|
|
|
|
std::string log_file;
|
|
StringRef
|
|
log_channels; // e.g. "lldb process threads:gdb-remote default:linux all"
|
|
|
|
GDBRemoteCommunicationServerPlatform::PortMap gdbserver_portmap;
|
|
int min_gdbserver_port = 0;
|
|
int max_gdbserver_port = 0;
|
|
uint16_t port_offset = 0;
|
|
|
|
FileSpec socket_file;
|
|
bool show_usage = false;
|
|
int option_error = 0;
|
|
int socket_error = -1;
|
|
|
|
std::string short_options(OptionParser::GetShortOptionString(g_long_options));
|
|
|
|
#if __GLIBC__
|
|
optind = 0;
|
|
#else
|
|
optreset = 1;
|
|
optind = 1;
|
|
#endif
|
|
|
|
while ((ch = getopt_long_only(argc, argv, short_options.c_str(),
|
|
g_long_options, &long_option_index)) != -1) {
|
|
switch (ch) {
|
|
case 0: // Any optional that auto set themselves will return 0
|
|
break;
|
|
|
|
case 'L':
|
|
listen_host_port.append(optarg);
|
|
break;
|
|
|
|
case 'l': // Set Log File
|
|
if (optarg && optarg[0])
|
|
log_file.assign(optarg);
|
|
break;
|
|
|
|
case 'c': // Log Channels
|
|
if (optarg && optarg[0])
|
|
log_channels = StringRef(optarg);
|
|
break;
|
|
|
|
case 'f': // Socket file
|
|
if (optarg && optarg[0])
|
|
socket_file.SetFile(optarg, FileSpec::Style::native);
|
|
break;
|
|
|
|
case 'p': {
|
|
if (!llvm::to_integer(optarg, port_offset)) {
|
|
llvm::errs() << "error: invalid port offset string " << optarg << "\n";
|
|
option_error = 4;
|
|
break;
|
|
}
|
|
if (port_offset < LOW_PORT || port_offset > HIGH_PORT) {
|
|
llvm::errs() << llvm::formatv("error: port offset {0} is not in the "
|
|
"valid user port range of {1} - {2}\n",
|
|
port_offset, LOW_PORT, HIGH_PORT);
|
|
option_error = 5;
|
|
}
|
|
} break;
|
|
|
|
case 'P':
|
|
case 'm':
|
|
case 'M': {
|
|
uint16_t portnum;
|
|
if (!llvm::to_integer(optarg, portnum)) {
|
|
llvm::errs() << "error: invalid port number string " << optarg << "\n";
|
|
option_error = 2;
|
|
break;
|
|
}
|
|
if (portnum < LOW_PORT || portnum > HIGH_PORT) {
|
|
llvm::errs() << llvm::formatv("error: port number {0} is not in the "
|
|
"valid user port range of {1} - {2}\n",
|
|
portnum, LOW_PORT, HIGH_PORT);
|
|
option_error = 1;
|
|
break;
|
|
}
|
|
if (ch == 'P')
|
|
gdbserver_portmap[portnum] = LLDB_INVALID_PROCESS_ID;
|
|
else if (ch == 'm')
|
|
min_gdbserver_port = portnum;
|
|
else
|
|
max_gdbserver_port = portnum;
|
|
} break;
|
|
|
|
case 'h': /* fall-through is intentional */
|
|
case '?':
|
|
show_usage = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!LLDBServerUtilities::SetupLogging(log_file, log_channels, 0))
|
|
return -1;
|
|
|
|
// Make a port map for a port range that was specified.
|
|
if (min_gdbserver_port < max_gdbserver_port) {
|
|
for (uint16_t port = min_gdbserver_port; port < max_gdbserver_port; ++port)
|
|
gdbserver_portmap[port] = LLDB_INVALID_PROCESS_ID;
|
|
} else if (min_gdbserver_port != max_gdbserver_port) {
|
|
fprintf(stderr, "error: --min-gdbserver-port (%u) is greater than "
|
|
"--max-gdbserver-port (%u)\n",
|
|
min_gdbserver_port, max_gdbserver_port);
|
|
option_error = 3;
|
|
}
|
|
|
|
// Print usage and exit if no listening port is specified.
|
|
if (listen_host_port.empty())
|
|
show_usage = true;
|
|
|
|
if (show_usage || option_error) {
|
|
display_usage(progname, subcommand);
|
|
exit(option_error);
|
|
}
|
|
|
|
// Skip any options we consumed with getopt_long_only.
|
|
argc -= optind;
|
|
argv += optind;
|
|
lldb_private::Args inferior_arguments;
|
|
inferior_arguments.SetArguments(argc, const_cast<const char **>(argv));
|
|
|
|
const bool children_inherit_listen_socket = false;
|
|
// the test suite makes many connections in parallel, let's not miss any.
|
|
// The highest this should get reasonably is a function of the number
|
|
// of target CPUs. For now, let's just use 100.
|
|
const int backlog = 100;
|
|
|
|
std::unique_ptr<Acceptor> acceptor_up(Acceptor::Create(
|
|
listen_host_port, children_inherit_listen_socket, error));
|
|
if (error.Fail()) {
|
|
fprintf(stderr, "failed to create acceptor: %s", error.AsCString());
|
|
exit(socket_error);
|
|
}
|
|
|
|
error = acceptor_up->Listen(backlog);
|
|
if (error.Fail()) {
|
|
printf("failed to listen: %s\n", error.AsCString());
|
|
exit(socket_error);
|
|
}
|
|
if (socket_file) {
|
|
error =
|
|
save_socket_id_to_file(acceptor_up->GetLocalSocketId(), socket_file);
|
|
if (error.Fail()) {
|
|
fprintf(stderr, "failed to write socket id to %s: %s\n",
|
|
socket_file.GetPath().c_str(), error.AsCString());
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
do {
|
|
GDBRemoteCommunicationServerPlatform platform(
|
|
acceptor_up->GetSocketProtocol(), acceptor_up->GetSocketScheme());
|
|
|
|
if (port_offset > 0)
|
|
platform.SetPortOffset(port_offset);
|
|
|
|
if (!gdbserver_portmap.empty()) {
|
|
platform.SetPortMap(std::move(gdbserver_portmap));
|
|
}
|
|
|
|
const bool children_inherit_accept_socket = true;
|
|
Connection *conn = nullptr;
|
|
error = acceptor_up->Accept(children_inherit_accept_socket, conn);
|
|
if (error.Fail()) {
|
|
printf("error: %s\n", error.AsCString());
|
|
exit(socket_error);
|
|
}
|
|
printf("Connection established.\n");
|
|
if (g_server) {
|
|
// Collect child zombie processes.
|
|
while (waitpid(-1, nullptr, WNOHANG) > 0)
|
|
;
|
|
if (fork()) {
|
|
// Parent doesn't need a connection to the lldb client
|
|
delete conn;
|
|
|
|
// Parent will continue to listen for new connections.
|
|
continue;
|
|
} else {
|
|
// Child process will handle the connection and exit.
|
|
g_server = 0;
|
|
// Listening socket is owned by parent process.
|
|
acceptor_up.release();
|
|
}
|
|
} else {
|
|
// If not running as a server, this process will not accept
|
|
// connections while a connection is active.
|
|
acceptor_up.reset();
|
|
}
|
|
platform.SetConnection(conn);
|
|
|
|
if (platform.IsConnected()) {
|
|
if (inferior_arguments.GetArgumentCount() > 0) {
|
|
lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
|
|
uint16_t port = 0;
|
|
std::string socket_name;
|
|
Status error = platform.LaunchGDBServer(inferior_arguments,
|
|
"", // hostname
|
|
pid, port, socket_name);
|
|
if (error.Success())
|
|
platform.SetPendingGdbServer(pid, port, socket_name);
|
|
else
|
|
fprintf(stderr, "failed to start gdbserver: %s\n", error.AsCString());
|
|
}
|
|
|
|
// After we connected, we need to get an initial ack from...
|
|
if (platform.HandshakeWithClient()) {
|
|
bool interrupt = false;
|
|
bool done = false;
|
|
while (!interrupt && !done) {
|
|
if (platform.GetPacketAndSendResponse(llvm::None, error, interrupt,
|
|
done) !=
|
|
GDBRemoteCommunication::PacketResult::Success)
|
|
break;
|
|
}
|
|
|
|
if (error.Fail()) {
|
|
fprintf(stderr, "error: %s\n", error.AsCString());
|
|
}
|
|
} else {
|
|
fprintf(stderr, "error: handshake with client failed\n");
|
|
}
|
|
}
|
|
} while (g_server);
|
|
|
|
fprintf(stderr, "lldb-server exiting...\n");
|
|
|
|
return 0;
|
|
}
|