| //===-- Host.mm -------------------------------------------------*- 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/Host.h" |
| #include "PosixSpawnResponsible.h" |
| |
| #include <AvailabilityMacros.h> |
| #include <TargetConditionals.h> |
| |
| #if TARGET_OS_OSX |
| #define __XPC_PRIVATE_H__ |
| #include <xpc/xpc.h> |
| |
| #define LaunchUsingXPCRightName "com.apple.lldb.RootDebuggingXPCService" |
| |
| // These XPC messaging keys are used for communication between Host.mm and the |
| // XPC service. |
| #define LauncherXPCServiceAuthKey "auth-key" |
| #define LauncherXPCServiceArgPrefxKey "arg" |
| #define LauncherXPCServiceEnvPrefxKey "env" |
| #define LauncherXPCServiceCPUTypeKey "cpuType" |
| #define LauncherXPCServicePosixspawnFlagsKey "posixspawnFlags" |
| #define LauncherXPCServiceStdInPathKeyKey "stdInPath" |
| #define LauncherXPCServiceStdOutPathKeyKey "stdOutPath" |
| #define LauncherXPCServiceStdErrPathKeyKey "stdErrPath" |
| #define LauncherXPCServiceChildPIDKey "childPID" |
| #define LauncherXPCServiceErrorTypeKey "errorType" |
| #define LauncherXPCServiceCodeTypeKey "errorCode" |
| |
| #include <bsm/audit.h> |
| #include <bsm/audit_session.h> |
| #endif |
| |
| #include "llvm/Support/Host.h" |
| |
| #include <asl.h> |
| #include <crt_externs.h> |
| #include <cstdio> |
| #include <cstdlib> |
| #include <dlfcn.h> |
| #include <grp.h> |
| #include <libproc.h> |
| #include <pwd.h> |
| #include <spawn.h> |
| #include <sys/proc.h> |
| #include <sys/stat.h> |
| #include <sys/sysctl.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include "lldb/Host/ConnectionFileDescriptor.h" |
| #include "lldb/Host/FileSystem.h" |
| #include "lldb/Host/HostInfo.h" |
| #include "lldb/Host/ProcessLaunchInfo.h" |
| #include "lldb/Host/ThreadLauncher.h" |
| #include "lldb/Utility/ArchSpec.h" |
| #include "lldb/Utility/LLDBLog.h" |
| #include "lldb/Utility/DataBufferHeap.h" |
| #include "lldb/Utility/DataExtractor.h" |
| #include "lldb/Utility/Endian.h" |
| #include "lldb/Utility/FileSpec.h" |
| #include "lldb/Utility/Log.h" |
| #include "lldb/Utility/NameMatches.h" |
| #include "lldb/Utility/ProcessInfo.h" |
| #include "lldb/Utility/StreamString.h" |
| #include "lldb/Utility/StructuredData.h" |
| #include "lldb/lldb-defines.h" |
| |
| #include "llvm/ADT/ScopeExit.h" |
| #include "llvm/Support/Errno.h" |
| #include "llvm/Support/FileSystem.h" |
| |
| #include "../cfcpp/CFCBundle.h" |
| #include "../cfcpp/CFCMutableArray.h" |
| #include "../cfcpp/CFCMutableDictionary.h" |
| #include "../cfcpp/CFCReleaser.h" |
| #include "../cfcpp/CFCString.h" |
| |
| #include <objc/objc-auto.h> |
| #include <os/log.h> |
| |
| #include <CoreFoundation/CoreFoundation.h> |
| #include <Foundation/Foundation.h> |
| |
| #ifndef _POSIX_SPAWN_DISABLE_ASLR |
| #define _POSIX_SPAWN_DISABLE_ASLR 0x0100 |
| #endif |
| |
| extern "C" { |
| int __pthread_chdir(const char *path); |
| int __pthread_fchdir(int fildes); |
| } |
| |
| using namespace lldb; |
| using namespace lldb_private; |
| |
| static os_log_t g_os_log; |
| static std::once_flag g_os_log_once; |
| |
| void Host::SystemLog(llvm::StringRef message) { |
| if (__builtin_available(macos 10.12, iOS 10, tvOS 10, watchOS 3, *)) { |
| std::call_once(g_os_log_once, []() { |
| g_os_log = os_log_create("com.apple.dt.lldb", "lldb"); |
| }); |
| os_log(g_os_log, "%{public}s", message.str().c_str()); |
| } else { |
| llvm::errs() << message; |
| } |
| } |
| |
| bool Host::GetBundleDirectory(const FileSpec &file, |
| FileSpec &bundle_directory) { |
| #if defined(__APPLE__) |
| if (FileSystem::Instance().IsDirectory(file)) { |
| char path[PATH_MAX]; |
| if (file.GetPath(path, sizeof(path))) { |
| CFCBundle bundle(path); |
| if (bundle.GetPath(path, sizeof(path))) { |
| bundle_directory.SetFile(path, FileSpec::Style::native); |
| return true; |
| } |
| } |
| } |
| #endif |
| bundle_directory.Clear(); |
| return false; |
| } |
| |
| bool Host::ResolveExecutableInBundle(FileSpec &file) { |
| #if defined(__APPLE__) |
| if (FileSystem::Instance().IsDirectory(file)) { |
| char path[PATH_MAX]; |
| if (file.GetPath(path, sizeof(path))) { |
| CFCBundle bundle(path); |
| CFCReleaser<CFURLRef> url(bundle.CopyExecutableURL()); |
| if (url.get()) { |
| if (::CFURLGetFileSystemRepresentation(url.get(), YES, (UInt8 *)path, |
| sizeof(path))) { |
| file.SetFile(path, FileSpec::Style::native); |
| return true; |
| } |
| } |
| } |
| } |
| #endif |
| return false; |
| } |
| |
| #if TARGET_OS_OSX |
| |
| static void *AcceptPIDFromInferior(const char *connect_url) { |
| ConnectionFileDescriptor file_conn; |
| Status error; |
| if (file_conn.Connect(connect_url, &error) == eConnectionStatusSuccess) { |
| char pid_str[256]; |
| ::memset(pid_str, 0, sizeof(pid_str)); |
| ConnectionStatus status; |
| const size_t pid_str_len = file_conn.Read( |
| pid_str, sizeof(pid_str), std::chrono::seconds(0), status, NULL); |
| if (pid_str_len > 0) { |
| int pid = atoi(pid_str); |
| return (void *)(intptr_t)pid; |
| } |
| } |
| return NULL; |
| } |
| |
| const char *applscript_in_new_tty = "tell application \"Terminal\"\n" |
| " activate\n" |
| " do script \"/bin/bash -c '%s';exit\"\n" |
| "end tell\n"; |
| |
| const char *applscript_in_existing_tty = "\ |
| set the_shell_script to \"/bin/bash -c '%s';exit\"\n\ |
| tell application \"Terminal\"\n\ |
| repeat with the_window in (get windows)\n\ |
| repeat with the_tab in tabs of the_window\n\ |
| set the_tty to tty in the_tab\n\ |
| if the_tty contains \"%s\" then\n\ |
| if the_tab is not busy then\n\ |
| set selected of the_tab to true\n\ |
| set frontmost of the_window to true\n\ |
| do script the_shell_script in the_tab\n\ |
| return\n\ |
| end if\n\ |
| end if\n\ |
| end repeat\n\ |
| end repeat\n\ |
| do script the_shell_script\n\ |
| end tell\n"; |
| |
| static Status |
| LaunchInNewTerminalWithAppleScript(const char *exe_path, |
| ProcessLaunchInfo &launch_info) { |
| Status error; |
| char unix_socket_name[PATH_MAX] = "/tmp/XXXXXX"; |
| if (::mktemp(unix_socket_name) == NULL) { |
| error.SetErrorString("failed to make temporary path for a unix socket"); |
| return error; |
| } |
| |
| StreamString command; |
| FileSpec darwin_debug_file_spec = HostInfo::GetSupportExeDir(); |
| if (!darwin_debug_file_spec) { |
| error.SetErrorString("can't locate the 'darwin-debug' executable"); |
| return error; |
| } |
| |
| darwin_debug_file_spec.GetFilename().SetCString("darwin-debug"); |
| |
| if (!FileSystem::Instance().Exists(darwin_debug_file_spec)) { |
| error.SetErrorStringWithFormat( |
| "the 'darwin-debug' executable doesn't exists at '%s'", |
| darwin_debug_file_spec.GetPath().c_str()); |
| return error; |
| } |
| |
| char launcher_path[PATH_MAX]; |
| darwin_debug_file_spec.GetPath(launcher_path, sizeof(launcher_path)); |
| |
| const ArchSpec &arch_spec = launch_info.GetArchitecture(); |
| // Only set the architecture if it is valid and if it isn't Haswell (x86_64h). |
| if (arch_spec.IsValid() && |
| arch_spec.GetCore() != ArchSpec::eCore_x86_64_x86_64h) |
| command.Printf("arch -arch %s ", arch_spec.GetArchitectureName()); |
| |
| command.Printf(R"(\"%s\" --unix-socket=%s)", launcher_path, unix_socket_name); |
| |
| if (arch_spec.IsValid()) |
| command.Printf(" --arch=%s", arch_spec.GetArchitectureName()); |
| |
| FileSpec working_dir{launch_info.GetWorkingDirectory()}; |
| if (working_dir) |
| command.Printf(R"( --working-dir \"%s\")", working_dir.GetCString()); |
| else { |
| char cwd[PATH_MAX]; |
| if (getcwd(cwd, PATH_MAX)) |
| command.Printf(R"( --working-dir \"%s\")", cwd); |
| } |
| |
| if (launch_info.GetFlags().Test(eLaunchFlagDisableASLR)) |
| command.PutCString(" --disable-aslr"); |
| |
| // We are launching on this host in a terminal. So compare the environment on |
| // the host to what is supplied in the launch_info. Any items that aren't in |
| // the host environment need to be sent to darwin-debug. If we send all |
| // environment entries, we might blow the max command line length, so we only |
| // send user modified entries. |
| Environment host_env = Host::GetEnvironment(); |
| |
| for (const auto &KV : launch_info.GetEnvironment()) { |
| auto host_entry = host_env.find(KV.first()); |
| if (host_entry == host_env.end() || host_entry->second != KV.second) |
| command.Format(R"( --env=\"{0}\")", Environment::compose(KV)); |
| } |
| |
| command.PutCString(" -- "); |
| |
| const char **argv = launch_info.GetArguments().GetConstArgumentVector(); |
| if (argv) { |
| for (size_t i = 0; argv[i] != NULL; ++i) { |
| if (i == 0) |
| command.Printf(R"( \"%s\")", exe_path); |
| else |
| command.Printf(R"( \"%s\")", argv[i]); |
| } |
| } else { |
| command.Printf(R"( \"%s\")", exe_path); |
| } |
| command.PutCString(" ; echo Process exited with status $?"); |
| if (launch_info.GetFlags().Test(lldb::eLaunchFlagCloseTTYOnExit)) |
| command.PutCString(" ; exit"); |
| |
| StreamString applescript_source; |
| |
| applescript_source.Printf(applscript_in_new_tty, |
| command.GetString().str().c_str()); |
| |
| NSAppleScript *applescript = [[NSAppleScript alloc] |
| initWithSource:[NSString stringWithCString:applescript_source.GetString() |
| .str() |
| .c_str() |
| encoding:NSUTF8StringEncoding]]; |
| |
| lldb::pid_t pid = LLDB_INVALID_PROCESS_ID; |
| |
| Status lldb_error; |
| // Sleep and wait a bit for debugserver to start to listen... |
| ConnectionFileDescriptor file_conn; |
| char connect_url[128]; |
| ::snprintf(connect_url, sizeof(connect_url), "unix-accept://%s", |
| unix_socket_name); |
| |
| // Spawn a new thread to accept incoming connection on the connect_url |
| // so we can grab the pid from the inferior. We have to do this because we |
| // are sending an AppleScript that will launch a process in Terminal.app, |
| // in a shell and the shell will fork/exec a couple of times before we get |
| // to the process that we wanted to launch. So when our process actually |
| // gets launched, we will handshake with it and get the process ID for it. |
| llvm::Expected<HostThread> accept_thread = ThreadLauncher::LaunchThread( |
| unix_socket_name, [&] { return AcceptPIDFromInferior(connect_url); }); |
| |
| if (!accept_thread) |
| return Status(accept_thread.takeError()); |
| |
| [applescript executeAndReturnError:nil]; |
| |
| thread_result_t accept_thread_result = NULL; |
| lldb_error = accept_thread->Join(&accept_thread_result); |
| if (lldb_error.Success() && accept_thread_result) { |
| pid = (intptr_t)accept_thread_result; |
| } |
| |
| llvm::sys::fs::remove(unix_socket_name); |
| [applescript release]; |
| if (pid != LLDB_INVALID_PROCESS_ID) |
| launch_info.SetProcessID(pid); |
| return error; |
| } |
| |
| #endif // TARGET_OS_OSX |
| |
| bool Host::OpenFileInExternalEditor(const FileSpec &file_spec, |
| uint32_t line_no) { |
| #if !TARGET_OS_OSX |
| return false; |
| #else // !TARGET_OS_OSX |
| // We attach this to an 'odoc' event to specify a particular selection |
| typedef struct { |
| int16_t reserved0; // must be zero |
| int16_t fLineNumber; |
| int32_t fSelStart; |
| int32_t fSelEnd; |
| uint32_t reserved1; // must be zero |
| uint32_t reserved2; // must be zero |
| } BabelAESelInfo; |
| |
| Log *log = GetLog(LLDBLog::Host); |
| char file_path[PATH_MAX]; |
| file_spec.GetPath(file_path, PATH_MAX); |
| CFCString file_cfstr(file_path, kCFStringEncodingUTF8); |
| CFCReleaser<CFURLRef> file_URL(::CFURLCreateWithFileSystemPath( |
| NULL, file_cfstr.get(), kCFURLPOSIXPathStyle, false)); |
| |
| LLDB_LOGF(log, |
| "Sending source file: \"%s\" and line: %d to external editor.\n", |
| file_path, line_no); |
| |
| long error; |
| BabelAESelInfo file_and_line_info = { |
| 0, // reserved0 |
| (int16_t)(line_no - 1), // fLineNumber (zero based line number) |
| 1, // fSelStart |
| 1024, // fSelEnd |
| 0, // reserved1 |
| 0 // reserved2 |
| }; |
| |
| AEKeyDesc file_and_line_desc; |
| |
| error = ::AECreateDesc(typeUTF8Text, &file_and_line_info, |
| sizeof(file_and_line_info), |
| &(file_and_line_desc.descContent)); |
| |
| if (error != noErr) { |
| LLDB_LOGF(log, "Error creating AEDesc: %ld.\n", error); |
| return false; |
| } |
| |
| file_and_line_desc.descKey = keyAEPosition; |
| |
| static std::string g_app_name; |
| static FSRef g_app_fsref; |
| |
| LSApplicationParameters app_params; |
| ::memset(&app_params, 0, sizeof(app_params)); |
| app_params.flags = |
| kLSLaunchDefaults | kLSLaunchDontAddToRecents | kLSLaunchDontSwitch; |
| |
| char *external_editor = ::getenv("LLDB_EXTERNAL_EDITOR"); |
| |
| if (external_editor) { |
| LLDB_LOGF(log, "Looking for external editor \"%s\".\n", external_editor); |
| |
| if (g_app_name.empty() || |
| strcmp(g_app_name.c_str(), external_editor) != 0) { |
| CFCString editor_name(external_editor, kCFStringEncodingUTF8); |
| error = ::LSFindApplicationForInfo(kLSUnknownCreator, NULL, |
| editor_name.get(), &g_app_fsref, NULL); |
| |
| // If we found the app, then store away the name so we don't have to |
| // re-look it up. |
| if (error != noErr) { |
| LLDB_LOGF(log, |
| "Could not find External Editor application, error: %ld.\n", |
| error); |
| return false; |
| } |
| } |
| app_params.application = &g_app_fsref; |
| } |
| |
| ProcessSerialNumber psn; |
| CFCReleaser<CFArrayRef> file_array( |
| CFArrayCreate(NULL, (const void **)file_URL.ptr_address(false), 1, NULL)); |
| error = ::LSOpenURLsWithRole(file_array.get(), kLSRolesAll, |
| &file_and_line_desc, &app_params, &psn, 1); |
| |
| AEDisposeDesc(&(file_and_line_desc.descContent)); |
| |
| if (error != noErr) { |
| LLDB_LOGF(log, "LSOpenURLsWithRole failed, error: %ld.\n", error); |
| |
| return false; |
| } |
| |
| return true; |
| #endif // TARGET_OS_OSX |
| } |
| |
| bool Host::IsInteractiveGraphicSession() { |
| #if !TARGET_OS_OSX |
| return false; |
| #else |
| auditinfo_addr_t info; |
| getaudit_addr(&info, sizeof(info)); |
| return info.ai_flags & AU_SESSION_FLAG_HAS_GRAPHIC_ACCESS; |
| #endif |
| } |
| |
| Environment Host::GetEnvironment() { return Environment(*_NSGetEnviron()); } |
| |
| static bool GetMacOSXProcessCPUType(ProcessInstanceInfo &process_info) { |
| if (process_info.ProcessIDIsValid()) { |
| // Make a new mib to stay thread safe |
| int mib[CTL_MAXNAME] = { |
| 0, |
| }; |
| size_t mib_len = CTL_MAXNAME; |
| if (::sysctlnametomib("sysctl.proc_cputype", mib, &mib_len)) |
| return false; |
| |
| mib[mib_len] = process_info.GetProcessID(); |
| mib_len++; |
| |
| cpu_type_t cpu, sub = 0; |
| size_t len = sizeof(cpu); |
| if (::sysctl(mib, mib_len, &cpu, &len, 0, 0) == 0) { |
| switch (cpu) { |
| case CPU_TYPE_I386: |
| sub = CPU_SUBTYPE_I386_ALL; |
| break; |
| case CPU_TYPE_X86_64: |
| sub = CPU_SUBTYPE_X86_64_ALL; |
| break; |
| |
| #if defined(CPU_TYPE_ARM64) && defined(CPU_SUBTYPE_ARM64_ALL) |
| case CPU_TYPE_ARM64: |
| sub = CPU_SUBTYPE_ARM64_ALL; |
| break; |
| #endif |
| |
| #if defined(CPU_TYPE_ARM64_32) && defined(CPU_SUBTYPE_ARM64_32_ALL) |
| case CPU_TYPE_ARM64_32: |
| sub = CPU_SUBTYPE_ARM64_32_ALL; |
| break; |
| #endif |
| |
| case CPU_TYPE_ARM: { |
| // Note that we fetched the cpu type from the PROCESS but we can't get a |
| // cpusubtype of the |
| // process -- we can only get the host's cpu subtype. |
| uint32_t cpusubtype = 0; |
| len = sizeof(cpusubtype); |
| if (::sysctlbyname("hw.cpusubtype", &cpusubtype, &len, NULL, 0) == 0) |
| sub = cpusubtype; |
| |
| bool host_cpu_is_64bit; |
| uint32_t is64bit_capable; |
| size_t is64bit_capable_len = sizeof(is64bit_capable); |
| host_cpu_is_64bit = |
| sysctlbyname("hw.cpu64bit_capable", &is64bit_capable, |
| &is64bit_capable_len, NULL, 0) == 0; |
| |
| // if the host is an armv8 device, its cpusubtype will be in |
| // CPU_SUBTYPE_ARM64 numbering |
| // and we need to rewrite it to a reasonable CPU_SUBTYPE_ARM value |
| // instead. |
| |
| if (host_cpu_is_64bit) { |
| sub = CPU_SUBTYPE_ARM_V7; |
| } |
| } break; |
| |
| default: |
| break; |
| } |
| process_info.GetArchitecture().SetArchitecture(eArchTypeMachO, cpu, sub); |
| return true; |
| } |
| } |
| process_info.GetArchitecture().Clear(); |
| return false; |
| } |
| |
| static bool GetMacOSXProcessArgs(const ProcessInstanceInfoMatch *match_info_ptr, |
| ProcessInstanceInfo &process_info) { |
| if (process_info.ProcessIDIsValid()) { |
| int proc_args_mib[3] = {CTL_KERN, KERN_PROCARGS2, |
| (int)process_info.GetProcessID()}; |
| |
| size_t arg_data_size = 0; |
| if (::sysctl(proc_args_mib, 3, nullptr, &arg_data_size, NULL, 0) || |
| arg_data_size == 0) |
| arg_data_size = 8192; |
| |
| // Add a few bytes to the calculated length, I know we need to add at least |
| // one byte |
| // to this number otherwise we get junk back, so add 128 just in case... |
| DataBufferHeap arg_data(arg_data_size + 128, 0); |
| arg_data_size = arg_data.GetByteSize(); |
| if (::sysctl(proc_args_mib, 3, arg_data.GetBytes(), &arg_data_size, NULL, |
| 0) == 0) { |
| DataExtractor data(arg_data.GetBytes(), arg_data_size, |
| endian::InlHostByteOrder(), sizeof(void *)); |
| lldb::offset_t offset = 0; |
| uint32_t argc = data.GetU32(&offset); |
| llvm::Triple &triple = process_info.GetArchitecture().GetTriple(); |
| const llvm::Triple::ArchType triple_arch = triple.getArch(); |
| const bool check_for_ios_simulator = |
| (triple_arch == llvm::Triple::x86 || |
| triple_arch == llvm::Triple::x86_64); |
| const char *cstr = data.GetCStr(&offset); |
| if (cstr) { |
| process_info.GetExecutableFile().SetFile(cstr, FileSpec::Style::native); |
| |
| if (match_info_ptr == NULL || |
| NameMatches( |
| process_info.GetExecutableFile().GetFilename().GetCString(), |
| match_info_ptr->GetNameMatchType(), |
| match_info_ptr->GetProcessInfo().GetName())) { |
| // Skip NULLs |
| while (true) { |
| const uint8_t *p = data.PeekData(offset, 1); |
| if ((p == NULL) || (*p != '\0')) |
| break; |
| ++offset; |
| } |
| // Now extract all arguments |
| Args &proc_args = process_info.GetArguments(); |
| for (int i = 0; i < static_cast<int>(argc); ++i) { |
| cstr = data.GetCStr(&offset); |
| if (cstr) |
| proc_args.AppendArgument(llvm::StringRef(cstr)); |
| } |
| |
| Environment &proc_env = process_info.GetEnvironment(); |
| while ((cstr = data.GetCStr(&offset))) { |
| if (cstr[0] == '\0') |
| break; |
| |
| if (check_for_ios_simulator) { |
| if (strncmp(cstr, "SIMULATOR_UDID=", strlen("SIMULATOR_UDID=")) == |
| 0) |
| process_info.GetArchitecture().GetTriple().setOS( |
| llvm::Triple::IOS); |
| else |
| process_info.GetArchitecture().GetTriple().setOS( |
| llvm::Triple::MacOSX); |
| } |
| |
| proc_env.insert(cstr); |
| } |
| return true; |
| } |
| } |
| } |
| } |
| return false; |
| } |
| |
| static bool GetMacOSXProcessUserAndGroup(ProcessInstanceInfo &process_info) { |
| if (process_info.ProcessIDIsValid()) { |
| int mib[4]; |
| mib[0] = CTL_KERN; |
| mib[1] = KERN_PROC; |
| mib[2] = KERN_PROC_PID; |
| mib[3] = process_info.GetProcessID(); |
| struct kinfo_proc proc_kinfo; |
| size_t proc_kinfo_size = sizeof(struct kinfo_proc); |
| |
| if (::sysctl(mib, 4, &proc_kinfo, &proc_kinfo_size, NULL, 0) == 0) { |
| if (proc_kinfo_size > 0) { |
| process_info.SetParentProcessID(proc_kinfo.kp_eproc.e_ppid); |
| process_info.SetUserID(proc_kinfo.kp_eproc.e_pcred.p_ruid); |
| process_info.SetGroupID(proc_kinfo.kp_eproc.e_pcred.p_rgid); |
| process_info.SetEffectiveUserID(proc_kinfo.kp_eproc.e_ucred.cr_uid); |
| if (proc_kinfo.kp_eproc.e_ucred.cr_ngroups > 0) |
| process_info.SetEffectiveGroupID( |
| proc_kinfo.kp_eproc.e_ucred.cr_groups[0]); |
| else |
| process_info.SetEffectiveGroupID(UINT32_MAX); |
| return true; |
| } |
| } |
| } |
| process_info.SetParentProcessID(LLDB_INVALID_PROCESS_ID); |
| process_info.SetUserID(UINT32_MAX); |
| process_info.SetGroupID(UINT32_MAX); |
| process_info.SetEffectiveUserID(UINT32_MAX); |
| process_info.SetEffectiveGroupID(UINT32_MAX); |
| return false; |
| } |
| |
| uint32_t Host::FindProcessesImpl(const ProcessInstanceInfoMatch &match_info, |
| ProcessInstanceInfoList &process_infos) { |
| std::vector<struct kinfo_proc> kinfos; |
| |
| int mib[3] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL}; |
| |
| size_t pid_data_size = 0; |
| if (::sysctl(mib, 3, nullptr, &pid_data_size, nullptr, 0) != 0) |
| return 0; |
| |
| // Add a few extra in case a few more show up |
| const size_t estimated_pid_count = |
| (pid_data_size / sizeof(struct kinfo_proc)) + 10; |
| |
| kinfos.resize(estimated_pid_count); |
| pid_data_size = kinfos.size() * sizeof(struct kinfo_proc); |
| |
| if (::sysctl(mib, 3, &kinfos[0], &pid_data_size, nullptr, 0) != 0) |
| return 0; |
| |
| const size_t actual_pid_count = (pid_data_size / sizeof(struct kinfo_proc)); |
| |
| bool all_users = match_info.GetMatchAllUsers(); |
| const lldb::pid_t our_pid = getpid(); |
| const uid_t our_uid = getuid(); |
| for (size_t i = 0; i < actual_pid_count; i++) { |
| const struct kinfo_proc &kinfo = kinfos[i]; |
| |
| bool kinfo_user_matches = false; |
| if (all_users) |
| kinfo_user_matches = true; |
| else |
| kinfo_user_matches = kinfo.kp_eproc.e_pcred.p_ruid == our_uid; |
| |
| // Special case, if lldb is being run as root we can attach to anything. |
| if (our_uid == 0) |
| kinfo_user_matches = true; |
| |
| if (!kinfo_user_matches || // Make sure the user is acceptable |
| static_cast<lldb::pid_t>(kinfo.kp_proc.p_pid) == |
| our_pid || // Skip this process |
| kinfo.kp_proc.p_pid == 0 || // Skip kernel (kernel pid is zero) |
| kinfo.kp_proc.p_stat == SZOMB || // Zombies are bad, they like brains... |
| kinfo.kp_proc.p_flag & P_TRACED || // Being debugged? |
| kinfo.kp_proc.p_flag & P_WEXIT) |
| continue; |
| |
| ProcessInstanceInfo process_info; |
| process_info.SetProcessID(kinfo.kp_proc.p_pid); |
| process_info.SetParentProcessID(kinfo.kp_eproc.e_ppid); |
| process_info.SetUserID(kinfo.kp_eproc.e_pcred.p_ruid); |
| process_info.SetGroupID(kinfo.kp_eproc.e_pcred.p_rgid); |
| process_info.SetEffectiveUserID(kinfo.kp_eproc.e_ucred.cr_uid); |
| if (kinfo.kp_eproc.e_ucred.cr_ngroups > 0) |
| process_info.SetEffectiveGroupID(kinfo.kp_eproc.e_ucred.cr_groups[0]); |
| else |
| process_info.SetEffectiveGroupID(UINT32_MAX); |
| |
| // Make sure our info matches before we go fetch the name and cpu type |
| if (!match_info.UserIDsMatch(process_info) || |
| !match_info.ProcessIDsMatch(process_info)) |
| continue; |
| |
| // Get CPU type first so we can know to look for iOS simulator is we have |
| // x86 or x86_64 |
| if (GetMacOSXProcessCPUType(process_info)) { |
| if (GetMacOSXProcessArgs(&match_info, process_info)) { |
| if (match_info.Matches(process_info)) |
| process_infos.push_back(process_info); |
| } |
| } |
| } |
| return process_infos.size(); |
| } |
| |
| bool Host::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) { |
| process_info.SetProcessID(pid); |
| bool success = false; |
| |
| // Get CPU type first so we can know to look for iOS simulator is we have x86 |
| // or x86_64 |
| if (GetMacOSXProcessCPUType(process_info)) |
| success = true; |
| |
| if (GetMacOSXProcessArgs(NULL, process_info)) |
| success = true; |
| |
| if (GetMacOSXProcessUserAndGroup(process_info)) |
| success = true; |
| |
| if (success) |
| return true; |
| |
| process_info.Clear(); |
| return false; |
| } |
| |
| #if TARGET_OS_OSX |
| static void PackageXPCArguments(xpc_object_t message, const char *prefix, |
| const Args &args) { |
| size_t count = args.GetArgumentCount(); |
| char buf[50]; // long enough for 'argXXX' |
| memset(buf, 0, 50); |
| sprintf(buf, "%sCount", prefix); |
| xpc_dictionary_set_int64(message, buf, count); |
| for (size_t i = 0; i < count; i++) { |
| memset(buf, 0, 50); |
| sprintf(buf, "%s%zi", prefix, i); |
| xpc_dictionary_set_string(message, buf, args.GetArgumentAtIndex(i)); |
| } |
| } |
| |
| static void PackageXPCEnvironment(xpc_object_t message, llvm::StringRef prefix, |
| const Environment &env) { |
| xpc_dictionary_set_int64(message, (prefix + "Count").str().c_str(), |
| env.size()); |
| size_t i = 0; |
| for (const auto &KV : env) { |
| xpc_dictionary_set_string(message, (prefix + llvm::Twine(i)).str().c_str(), |
| Environment::compose(KV).c_str()); |
| } |
| } |
| |
| /* |
| A valid authorizationRef means that |
| - there is the LaunchUsingXPCRightName rights in the /etc/authorization |
| - we have successfully copied the rights to be send over the XPC wire |
| Once obtained, it will be valid for as long as the process lives. |
| */ |
| static AuthorizationRef authorizationRef = NULL; |
| static Status getXPCAuthorization(ProcessLaunchInfo &launch_info) { |
| Status error; |
| Log *log(GetLog(LLDBLog::Host | LLDBLog::Process)); |
| |
| if ((launch_info.GetUserID() == 0) && !authorizationRef) { |
| OSStatus createStatus = |
| AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, |
| kAuthorizationFlagDefaults, &authorizationRef); |
| if (createStatus != errAuthorizationSuccess) { |
| error.SetError(1, eErrorTypeGeneric); |
| error.SetErrorString("Can't create authorizationRef."); |
| LLDB_LOG(log, "error: {0}", error); |
| return error; |
| } |
| |
| OSStatus rightsStatus = |
| AuthorizationRightGet(LaunchUsingXPCRightName, NULL); |
| if (rightsStatus != errAuthorizationSuccess) { |
| // No rights in the security database, Create it with the right prompt. |
| CFStringRef prompt = |
| CFSTR("Xcode is trying to take control of a root process."); |
| CFStringRef keys[] = {CFSTR("en")}; |
| CFTypeRef values[] = {prompt}; |
| CFDictionaryRef promptDict = CFDictionaryCreate( |
| kCFAllocatorDefault, (const void **)keys, (const void **)values, 1, |
| &kCFCopyStringDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks); |
| |
| CFStringRef keys1[] = {CFSTR("class"), CFSTR("group"), CFSTR("comment"), |
| CFSTR("default-prompt"), CFSTR("shared")}; |
| CFTypeRef values1[] = {CFSTR("user"), CFSTR("admin"), |
| CFSTR(LaunchUsingXPCRightName), promptDict, |
| kCFBooleanFalse}; |
| CFDictionaryRef dict = CFDictionaryCreate( |
| kCFAllocatorDefault, (const void **)keys1, (const void **)values1, 5, |
| &kCFCopyStringDictionaryKeyCallBacks, |
| &kCFTypeDictionaryValueCallBacks); |
| rightsStatus = AuthorizationRightSet( |
| authorizationRef, LaunchUsingXPCRightName, dict, NULL, NULL, NULL); |
| CFRelease(promptDict); |
| CFRelease(dict); |
| } |
| |
| OSStatus copyRightStatus = errAuthorizationDenied; |
| if (rightsStatus == errAuthorizationSuccess) { |
| AuthorizationItem item1 = {LaunchUsingXPCRightName, 0, NULL, 0}; |
| AuthorizationItem items[] = {item1}; |
| AuthorizationRights requestedRights = {1, items}; |
| AuthorizationFlags authorizationFlags = |
| kAuthorizationFlagInteractionAllowed | kAuthorizationFlagExtendRights; |
| copyRightStatus = AuthorizationCopyRights( |
| authorizationRef, &requestedRights, kAuthorizationEmptyEnvironment, |
| authorizationFlags, NULL); |
| } |
| |
| if (copyRightStatus != errAuthorizationSuccess) { |
| // Eventually when the commandline supports running as root and the user |
| // is not |
| // logged in in the current audit session, we will need the trick in gdb |
| // where |
| // we ask the user to type in the root passwd in the terminal. |
| error.SetError(2, eErrorTypeGeneric); |
| error.SetErrorStringWithFormat( |
| "Launching as root needs root authorization."); |
| LLDB_LOG(log, "error: {0}", error); |
| |
| if (authorizationRef) { |
| AuthorizationFree(authorizationRef, kAuthorizationFlagDefaults); |
| authorizationRef = NULL; |
| } |
| } |
| } |
| |
| return error; |
| } |
| #endif |
| |
| static short GetPosixspawnFlags(const ProcessLaunchInfo &launch_info) { |
| short flags = POSIX_SPAWN_SETSIGDEF | POSIX_SPAWN_SETSIGMASK; |
| |
| if (launch_info.GetFlags().Test(eLaunchFlagExec)) |
| flags |= POSIX_SPAWN_SETEXEC; // Darwin specific posix_spawn flag |
| |
| if (launch_info.GetFlags().Test(eLaunchFlagDebug)) |
| flags |= POSIX_SPAWN_START_SUSPENDED; // Darwin specific posix_spawn flag |
| |
| if (launch_info.GetFlags().Test(eLaunchFlagDisableASLR)) |
| flags |= _POSIX_SPAWN_DISABLE_ASLR; // Darwin specific posix_spawn flag |
| |
| if (launch_info.GetLaunchInSeparateProcessGroup()) |
| flags |= POSIX_SPAWN_SETPGROUP; |
| |
| #ifdef POSIX_SPAWN_CLOEXEC_DEFAULT |
| #if defined(__x86_64__) || defined(__i386__) |
| static LazyBool g_use_close_on_exec_flag = eLazyBoolCalculate; |
| if (g_use_close_on_exec_flag == eLazyBoolCalculate) { |
| g_use_close_on_exec_flag = eLazyBoolNo; |
| |
| llvm::VersionTuple version = HostInfo::GetOSVersion(); |
| if (version > llvm::VersionTuple(10, 7)) { |
| // Kernel panic if we use the POSIX_SPAWN_CLOEXEC_DEFAULT on 10.7 or |
| // earlier |
| g_use_close_on_exec_flag = eLazyBoolYes; |
| } |
| } |
| #else |
| static LazyBool g_use_close_on_exec_flag = eLazyBoolYes; |
| #endif // defined(__x86_64__) || defined(__i386__) |
| // Close all files exception those with file actions if this is supported. |
| if (g_use_close_on_exec_flag == eLazyBoolYes) |
| flags |= POSIX_SPAWN_CLOEXEC_DEFAULT; |
| #endif // ifdef POSIX_SPAWN_CLOEXEC_DEFAULT |
| return flags; |
| } |
| |
| static Status LaunchProcessXPC(const char *exe_path, |
| ProcessLaunchInfo &launch_info, |
| lldb::pid_t &pid) { |
| #if TARGET_OS_OSX |
| Status error = getXPCAuthorization(launch_info); |
| if (error.Fail()) |
| return error; |
| |
| Log *log(GetLog(LLDBLog::Host | LLDBLog::Process)); |
| |
| uid_t requested_uid = launch_info.GetUserID(); |
| const char *xpc_service = nil; |
| bool send_auth = false; |
| AuthorizationExternalForm extForm; |
| if (requested_uid == 0) { |
| if (AuthorizationMakeExternalForm(authorizationRef, &extForm) == |
| errAuthorizationSuccess) { |
| send_auth = true; |
| } else { |
| error.SetError(3, eErrorTypeGeneric); |
| error.SetErrorStringWithFormat("Launching root via XPC needs to " |
| "externalize authorization reference."); |
| LLDB_LOG(log, "error: {0}", error); |
| return error; |
| } |
| xpc_service = LaunchUsingXPCRightName; |
| } else { |
| error.SetError(4, eErrorTypeGeneric); |
| error.SetErrorStringWithFormat( |
| "Launching via XPC is only currently available for root."); |
| LLDB_LOG(log, "error: {0}", error); |
| return error; |
| } |
| |
| xpc_connection_t conn = xpc_connection_create(xpc_service, NULL); |
| |
| xpc_connection_set_event_handler(conn, ^(xpc_object_t event) { |
| xpc_type_t type = xpc_get_type(event); |
| |
| if (type == XPC_TYPE_ERROR) { |
| if (event == XPC_ERROR_CONNECTION_INTERRUPTED) { |
| // The service has either canceled itself, crashed, or been terminated. |
| // The XPC connection is still valid and sending a message to it will |
| // re-launch the service. |
| // If the service is state-full, this is the time to initialize the new |
| // service. |
| return; |
| } else if (event == XPC_ERROR_CONNECTION_INVALID) { |
| // The service is invalid. Either the service name supplied to |
| // xpc_connection_create() is incorrect |
| // or we (this process) have canceled the service; we can do any cleanup |
| // of application state at this point. |
| // printf("Service disconnected"); |
| return; |
| } else { |
| // printf("Unexpected error from service: %s", |
| // xpc_dictionary_get_string(event, XPC_ERROR_KEY_DESCRIPTION)); |
| } |
| |
| } else { |
| // printf("Received unexpected event in handler"); |
| } |
| }); |
| |
| xpc_connection_set_finalizer_f(conn, xpc_finalizer_t(xpc_release)); |
| xpc_connection_resume(conn); |
| xpc_object_t message = xpc_dictionary_create(nil, nil, 0); |
| |
| if (send_auth) { |
| xpc_dictionary_set_data(message, LauncherXPCServiceAuthKey, extForm.bytes, |
| sizeof(AuthorizationExternalForm)); |
| } |
| |
| PackageXPCArguments(message, LauncherXPCServiceArgPrefxKey, |
| launch_info.GetArguments()); |
| PackageXPCEnvironment(message, LauncherXPCServiceEnvPrefxKey, |
| launch_info.GetEnvironment()); |
| |
| // Posix spawn stuff. |
| xpc_dictionary_set_int64(message, LauncherXPCServiceCPUTypeKey, |
| launch_info.GetArchitecture().GetMachOCPUType()); |
| xpc_dictionary_set_int64(message, LauncherXPCServicePosixspawnFlagsKey, |
| GetPosixspawnFlags(launch_info)); |
| const FileAction *file_action = launch_info.GetFileActionForFD(STDIN_FILENO); |
| if (file_action && !file_action->GetPath().empty()) { |
| xpc_dictionary_set_string(message, LauncherXPCServiceStdInPathKeyKey, |
| file_action->GetPath().str().c_str()); |
| } |
| file_action = launch_info.GetFileActionForFD(STDOUT_FILENO); |
| if (file_action && !file_action->GetPath().empty()) { |
| xpc_dictionary_set_string(message, LauncherXPCServiceStdOutPathKeyKey, |
| file_action->GetPath().str().c_str()); |
| } |
| file_action = launch_info.GetFileActionForFD(STDERR_FILENO); |
| if (file_action && !file_action->GetPath().empty()) { |
| xpc_dictionary_set_string(message, LauncherXPCServiceStdErrPathKeyKey, |
| file_action->GetPath().str().c_str()); |
| } |
| |
| xpc_object_t reply = |
| xpc_connection_send_message_with_reply_sync(conn, message); |
| xpc_type_t returnType = xpc_get_type(reply); |
| if (returnType == XPC_TYPE_DICTIONARY) { |
| pid = xpc_dictionary_get_int64(reply, LauncherXPCServiceChildPIDKey); |
| if (pid == 0) { |
| int errorType = |
| xpc_dictionary_get_int64(reply, LauncherXPCServiceErrorTypeKey); |
| int errorCode = |
| xpc_dictionary_get_int64(reply, LauncherXPCServiceCodeTypeKey); |
| |
| error.SetError(errorCode, eErrorTypeGeneric); |
| error.SetErrorStringWithFormat( |
| "Problems with launching via XPC. Error type : %i, code : %i", |
| errorType, errorCode); |
| LLDB_LOG(log, "error: {0}", error); |
| |
| if (authorizationRef) { |
| AuthorizationFree(authorizationRef, kAuthorizationFlagDefaults); |
| authorizationRef = NULL; |
| } |
| } |
| } else if (returnType == XPC_TYPE_ERROR) { |
| error.SetError(5, eErrorTypeGeneric); |
| error.SetErrorStringWithFormat( |
| "Problems with launching via XPC. XPC error : %s", |
| xpc_dictionary_get_string(reply, XPC_ERROR_KEY_DESCRIPTION)); |
| LLDB_LOG(log, "error: {0}", error); |
| } |
| |
| return error; |
| #else |
| Status error; |
| return error; |
| #endif |
| } |
| |
| static bool AddPosixSpawnFileAction(void *_file_actions, const FileAction *info, |
| Log *log, Status &error) { |
| if (info == NULL) |
| return false; |
| |
| posix_spawn_file_actions_t *file_actions = |
| static_cast<posix_spawn_file_actions_t *>(_file_actions); |
| |
| switch (info->GetAction()) { |
| case FileAction::eFileActionNone: |
| error.Clear(); |
| break; |
| |
| case FileAction::eFileActionClose: |
| if (info->GetFD() == -1) |
| error.SetErrorString( |
| "invalid fd for posix_spawn_file_actions_addclose(...)"); |
| else { |
| error.SetError( |
| ::posix_spawn_file_actions_addclose(file_actions, info->GetFD()), |
| eErrorTypePOSIX); |
| if (error.Fail()) |
| LLDB_LOG(log, |
| "error: {0}, posix_spawn_file_actions_addclose " |
| "(action={1}, fd={2})", |
| error, file_actions, info->GetFD()); |
| } |
| break; |
| |
| case FileAction::eFileActionDuplicate: |
| if (info->GetFD() == -1) |
| error.SetErrorString( |
| "invalid fd for posix_spawn_file_actions_adddup2(...)"); |
| else if (info->GetActionArgument() == -1) |
| error.SetErrorString( |
| "invalid duplicate fd for posix_spawn_file_actions_adddup2(...)"); |
| else { |
| error.SetError( |
| ::posix_spawn_file_actions_adddup2(file_actions, info->GetFD(), |
| info->GetActionArgument()), |
| eErrorTypePOSIX); |
| if (error.Fail()) |
| LLDB_LOG(log, |
| "error: {0}, posix_spawn_file_actions_adddup2 " |
| "(action={1}, fd={2}, dup_fd={3})", |
| error, file_actions, info->GetFD(), info->GetActionArgument()); |
| } |
| break; |
| |
| case FileAction::eFileActionOpen: |
| if (info->GetFD() == -1) |
| error.SetErrorString( |
| "invalid fd in posix_spawn_file_actions_addopen(...)"); |
| else { |
| int oflag = info->GetActionArgument(); |
| |
| mode_t mode = 0; |
| |
| if (oflag & O_CREAT) |
| mode = 0640; |
| |
| error.SetError(::posix_spawn_file_actions_addopen( |
| file_actions, info->GetFD(), |
| info->GetPath().str().c_str(), oflag, mode), |
| eErrorTypePOSIX); |
| if (error.Fail()) |
| LLDB_LOG(log, |
| "error: {0}, posix_spawn_file_actions_addopen (action={1}, " |
| "fd={2}, path='{3}', oflag={4}, mode={5})", |
| error, file_actions, info->GetFD(), info->GetPath(), oflag, |
| mode); |
| } |
| break; |
| } |
| return error.Success(); |
| } |
| |
| static Status LaunchProcessPosixSpawn(const char *exe_path, |
| const ProcessLaunchInfo &launch_info, |
| lldb::pid_t &pid) { |
| Status error; |
| Log *log(GetLog(LLDBLog::Host | LLDBLog::Process)); |
| |
| posix_spawnattr_t attr; |
| error.SetError(::posix_spawnattr_init(&attr), eErrorTypePOSIX); |
| |
| if (error.Fail()) { |
| LLDB_LOG(log, "error: {0}, ::posix_spawnattr_init ( &attr )", error); |
| return error; |
| } |
| |
| // Make sure we clean up the posix spawn attributes before exiting this scope. |
| auto cleanup_attr = |
| llvm::make_scope_exit([&]() { posix_spawnattr_destroy(&attr); }); |
| |
| sigset_t no_signals; |
| sigset_t all_signals; |
| sigemptyset(&no_signals); |
| sigfillset(&all_signals); |
| ::posix_spawnattr_setsigmask(&attr, &no_signals); |
| ::posix_spawnattr_setsigdefault(&attr, &all_signals); |
| |
| short flags = GetPosixspawnFlags(launch_info); |
| |
| error.SetError(::posix_spawnattr_setflags(&attr, flags), eErrorTypePOSIX); |
| if (error.Fail()) { |
| LLDB_LOG(log, |
| "error: {0}, ::posix_spawnattr_setflags ( &attr, flags={1:x} )", |
| error, flags); |
| return error; |
| } |
| |
| bool is_graphical = true; |
| |
| #if TARGET_OS_OSX |
| SecuritySessionId session_id; |
| SessionAttributeBits session_attributes; |
| OSStatus status = |
| SessionGetInfo(callerSecuritySession, &session_id, &session_attributes); |
| if (status == errSessionSuccess) |
| is_graphical = session_attributes & sessionHasGraphicAccess; |
| #endif |
| |
| // When lldb is ran through a graphical session, make the debuggee process |
| // responsible for its own TCC permissions instead of inheriting them from |
| // its parent. |
| if (is_graphical && launch_info.GetFlags().Test(eLaunchFlagDebug) && |
| !launch_info.GetFlags().Test(eLaunchFlagInheritTCCFromParent)) { |
| error.SetError(setup_posix_spawn_responsible_flag(&attr), eErrorTypePOSIX); |
| if (error.Fail()) { |
| LLDB_LOG(log, "error: {0}, setup_posix_spawn_responsible_flag(&attr)", |
| error); |
| return error; |
| } |
| } |
| |
| // Don't set the binpref if a shell was provided. After all, that's only |
| // going to affect what version of the shell is launched, not what fork of |
| // the binary is launched. We insert "arch --arch <ARCH> as part of the |
| // shell invocation to do that job on OSX. |
| if (launch_info.GetShell() == FileSpec()) { |
| const ArchSpec &arch_spec = launch_info.GetArchitecture(); |
| cpu_type_t cpu_type = arch_spec.GetMachOCPUType(); |
| cpu_type_t cpu_subtype = arch_spec.GetMachOCPUSubType(); |
| const bool set_cpu_type = |
| cpu_type != 0 && cpu_type != static_cast<cpu_type_t>(UINT32_MAX) && |
| cpu_type != static_cast<cpu_type_t>(LLDB_INVALID_CPUTYPE); |
| const bool set_cpu_subtype = |
| cpu_subtype != 0 && |
| cpu_subtype != static_cast<cpu_subtype_t>(UINT32_MAX) && |
| cpu_subtype != CPU_SUBTYPE_X86_64_H; |
| if (set_cpu_type) { |
| size_t ocount = 0; |
| typedef int (*posix_spawnattr_setarchpref_np_t)( |
| posix_spawnattr_t *, size_t, cpu_type_t *, cpu_subtype_t *, size_t *); |
| posix_spawnattr_setarchpref_np_t posix_spawnattr_setarchpref_np_fn = |
| (posix_spawnattr_setarchpref_np_t)dlsym( |
| RTLD_DEFAULT, "posix_spawnattr_setarchpref_np"); |
| if (set_cpu_subtype && posix_spawnattr_setarchpref_np_fn) { |
| error.SetError((*posix_spawnattr_setarchpref_np_fn)( |
| &attr, 1, &cpu_type, &cpu_subtype, &ocount), |
| eErrorTypePOSIX); |
| if (error.Fail()) |
| LLDB_LOG(log, |
| "error: {0}, ::posix_spawnattr_setarchpref_np ( &attr, 1, " |
| "cpu_type = {1:x}, cpu_subtype = {1:x}, count => {2} )", |
| error, cpu_type, cpu_subtype, ocount); |
| |
| if (error.Fail() || ocount != 1) |
| return error; |
| } else { |
| error.SetError( |
| ::posix_spawnattr_setbinpref_np(&attr, 1, &cpu_type, &ocount), |
| eErrorTypePOSIX); |
| if (error.Fail()) |
| LLDB_LOG(log, |
| "error: {0}, ::posix_spawnattr_setbinpref_np ( &attr, 1, " |
| "cpu_type = {1:x}, count => {2} )", |
| error, cpu_type, ocount); |
| if (error.Fail() || ocount != 1) |
| return error; |
| } |
| } |
| } |
| |
| const char *tmp_argv[2]; |
| char *const *argv = const_cast<char *const *>( |
| launch_info.GetArguments().GetConstArgumentVector()); |
| Environment::Envp envp = launch_info.GetEnvironment().getEnvp(); |
| if (argv == NULL) { |
| // posix_spawn gets very unhappy if it doesn't have at least the program |
| // name in argv[0]. One of the side affects I have noticed is the |
| // environment |
| // variables don't make it into the child process if "argv == NULL"!!! |
| tmp_argv[0] = exe_path; |
| tmp_argv[1] = NULL; |
| argv = const_cast<char *const *>(tmp_argv); |
| } |
| |
| FileSpec working_dir{launch_info.GetWorkingDirectory()}; |
| if (working_dir) { |
| // Set the working directory on this thread only |
| if (__pthread_chdir(working_dir.GetCString()) < 0) { |
| if (errno == ENOENT) { |
| error.SetErrorStringWithFormat("No such file or directory: %s", |
| working_dir.GetCString()); |
| } else if (errno == ENOTDIR) { |
| error.SetErrorStringWithFormat("Path doesn't name a directory: %s", |
| working_dir.GetCString()); |
| } else { |
| error.SetErrorStringWithFormat("An unknown error occurred when " |
| "changing directory for process " |
| "execution."); |
| } |
| return error; |
| } |
| } |
| |
| ::pid_t result_pid = LLDB_INVALID_PROCESS_ID; |
| const size_t num_file_actions = launch_info.GetNumFileActions(); |
| if (num_file_actions > 0) { |
| posix_spawn_file_actions_t file_actions; |
| error.SetError(::posix_spawn_file_actions_init(&file_actions), |
| eErrorTypePOSIX); |
| if (error.Fail()) { |
| LLDB_LOG(log, |
| "error: {0}, ::posix_spawn_file_actions_init ( &file_actions )", |
| error); |
| return error; |
| } |
| |
| // Make sure we clean up the posix file actions before exiting this scope. |
| auto cleanup_fileact = llvm::make_scope_exit( |
| [&]() { posix_spawn_file_actions_destroy(&file_actions); }); |
| |
| for (size_t i = 0; i < num_file_actions; ++i) { |
| const FileAction *launch_file_action = |
| launch_info.GetFileActionAtIndex(i); |
| if (launch_file_action) { |
| if (!AddPosixSpawnFileAction(&file_actions, launch_file_action, log, |
| error)) |
| return error; |
| } |
| } |
| |
| error.SetError( |
| ::posix_spawnp(&result_pid, exe_path, &file_actions, &attr, argv, envp), |
| eErrorTypePOSIX); |
| |
| if (error.Fail()) { |
| LLDB_LOG(log, |
| "error: {0}, ::posix_spawnp(pid => {1}, path = '{2}', " |
| "file_actions = {3}, " |
| "attr = {4}, argv = {5}, envp = {6} )", |
| error, result_pid, exe_path, &file_actions, &attr, argv, |
| envp.get()); |
| if (log) { |
| for (int ii = 0; argv[ii]; ++ii) |
| LLDB_LOG(log, "argv[{0}] = '{1}'", ii, argv[ii]); |
| } |
| } |
| |
| } else { |
| error.SetError( |
| ::posix_spawnp(&result_pid, exe_path, NULL, &attr, argv, envp), |
| eErrorTypePOSIX); |
| |
| if (error.Fail()) { |
| LLDB_LOG(log, |
| "error: {0}, ::posix_spawnp ( pid => {1}, path = '{2}', " |
| "file_actions = NULL, attr = {3}, argv = {4}, envp = {5} )", |
| error, result_pid, exe_path, &attr, argv, envp.get()); |
| if (log) { |
| for (int ii = 0; argv[ii]; ++ii) |
| LLDB_LOG(log, "argv[{0}] = '{1}'", ii, argv[ii]); |
| } |
| } |
| } |
| pid = result_pid; |
| |
| if (working_dir) { |
| // No more thread specific current working directory |
| __pthread_fchdir(-1); |
| } |
| |
| return error; |
| } |
| |
| static bool ShouldLaunchUsingXPC(ProcessLaunchInfo &launch_info) { |
| bool result = false; |
| |
| #if TARGET_OS_OSX |
| bool launchingAsRoot = launch_info.GetUserID() == 0; |
| bool currentUserIsRoot = HostInfo::GetEffectiveUserID() == 0; |
| |
| if (launchingAsRoot && !currentUserIsRoot) { |
| // If current user is already root, we don't need XPC's help. |
| result = true; |
| } |
| #endif |
| |
| return result; |
| } |
| |
| Status Host::LaunchProcess(ProcessLaunchInfo &launch_info) { |
| Status error; |
| |
| FileSystem &fs = FileSystem::Instance(); |
| FileSpec exe_spec(launch_info.GetExecutableFile()); |
| |
| if (!fs.Exists(exe_spec)) |
| FileSystem::Instance().Resolve(exe_spec); |
| |
| if (!fs.Exists(exe_spec)) |
| FileSystem::Instance().ResolveExecutableLocation(exe_spec); |
| |
| if (!fs.Exists(exe_spec)) { |
| error.SetErrorStringWithFormatv("executable doesn't exist: '{0}'", |
| exe_spec); |
| return error; |
| } |
| |
| if (launch_info.GetFlags().Test(eLaunchFlagLaunchInTTY)) { |
| #if TARGET_OS_OSX |
| return LaunchInNewTerminalWithAppleScript(exe_spec.GetPath().c_str(), |
| launch_info); |
| #else |
| error.SetErrorString("launching a process in a new terminal is not " |
| "supported on iOS devices"); |
| return error; |
| #endif |
| } |
| |
| lldb::pid_t pid = LLDB_INVALID_PROCESS_ID; |
| |
| auto exe_path = exe_spec.GetPath(); |
| |
| if (ShouldLaunchUsingXPC(launch_info)) |
| error = LaunchProcessXPC(exe_path.c_str(), launch_info, pid); |
| else |
| error = LaunchProcessPosixSpawn(exe_path.c_str(), launch_info, pid); |
| |
| if (pid != LLDB_INVALID_PROCESS_ID) { |
| // If all went well, then set the process ID into the launch info |
| launch_info.SetProcessID(pid); |
| |
| // Make sure we reap any processes we spawn or we will have zombies. |
| bool monitoring = launch_info.MonitorProcess(); |
| UNUSED_IF_ASSERT_DISABLED(monitoring); |
| assert(monitoring); |
| } else { |
| // Invalid process ID, something didn't go well |
| if (error.Success()) |
| error.SetErrorString("process launch failed for unknown reasons"); |
| } |
| return error; |
| } |
| |
| Status Host::ShellExpandArguments(ProcessLaunchInfo &launch_info) { |
| Status error; |
| if (launch_info.GetFlags().Test(eLaunchFlagShellExpandArguments)) { |
| FileSpec expand_tool_spec = HostInfo::GetSupportExeDir(); |
| if (!expand_tool_spec) { |
| error.SetErrorString( |
| "could not get support executable directory for lldb-argdumper tool"); |
| return error; |
| } |
| expand_tool_spec.AppendPathComponent("lldb-argdumper"); |
| if (!FileSystem::Instance().Exists(expand_tool_spec)) { |
| error.SetErrorStringWithFormat( |
| "could not find the lldb-argdumper tool: %s", |
| expand_tool_spec.GetPath().c_str()); |
| return error; |
| } |
| |
| StreamString expand_tool_spec_stream; |
| expand_tool_spec_stream.Printf("\"%s\"", |
| expand_tool_spec.GetPath().c_str()); |
| |
| Args expand_command(expand_tool_spec_stream.GetData()); |
| expand_command.AppendArguments(launch_info.GetArguments()); |
| |
| int status; |
| std::string output; |
| FileSpec cwd(launch_info.GetWorkingDirectory()); |
| if (!FileSystem::Instance().Exists(cwd)) { |
| char *wd = getcwd(nullptr, 0); |
| if (wd == nullptr) { |
| error.SetErrorStringWithFormat( |
| "cwd does not exist; cannot launch with shell argument expansion"); |
| return error; |
| } else { |
| FileSpec working_dir(wd); |
| free(wd); |
| launch_info.SetWorkingDirectory(working_dir); |
| } |
| } |
| bool run_in_shell = true; |
| bool hide_stderr = true; |
| Status e = |
| RunShellCommand(expand_command, cwd, &status, nullptr, &output, |
| std::chrono::seconds(10), run_in_shell, hide_stderr); |
| |
| if (e.Fail()) |
| return e; |
| |
| if (status != 0) { |
| error.SetErrorStringWithFormat("lldb-argdumper exited with error %d", |
| status); |
| return error; |
| } |
| |
| auto data_sp = StructuredData::ParseJSON(output); |
| if (!data_sp) { |
| error.SetErrorString("invalid JSON"); |
| return error; |
| } |
| |
| auto dict_sp = data_sp->GetAsDictionary(); |
| if (!data_sp) { |
| error.SetErrorString("invalid JSON"); |
| return error; |
| } |
| |
| auto args_sp = dict_sp->GetObjectForDotSeparatedPath("arguments"); |
| if (!args_sp) { |
| error.SetErrorString("invalid JSON"); |
| return error; |
| } |
| |
| auto args_array_sp = args_sp->GetAsArray(); |
| if (!args_array_sp) { |
| error.SetErrorString("invalid JSON"); |
| return error; |
| } |
| |
| launch_info.GetArguments().Clear(); |
| |
| for (size_t i = 0; i < args_array_sp->GetSize(); i++) { |
| auto item_sp = args_array_sp->GetItemAtIndex(i); |
| if (!item_sp) |
| continue; |
| auto str_sp = item_sp->GetAsString(); |
| if (!str_sp) |
| continue; |
| |
| launch_info.GetArguments().AppendArgument(str_sp->GetValue()); |
| } |
| } |
| |
| return error; |
| } |
| |
| llvm::Expected<HostThread> Host::StartMonitoringChildProcess( |
| const Host::MonitorChildProcessCallback &callback, lldb::pid_t pid) { |
| unsigned long mask = DISPATCH_PROC_EXIT; |
| |
| Log *log(GetLog(LLDBLog::Host | LLDBLog::Process)); |
| |
| dispatch_source_t source = ::dispatch_source_create( |
| DISPATCH_SOURCE_TYPE_PROC, pid, mask, |
| ::dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)); |
| |
| LLDB_LOGF(log, |
| "Host::StartMonitoringChildProcess(callback, pid=%i) source = %p\n", |
| static_cast<int>(pid), static_cast<void *>(source)); |
| |
| if (source) { |
| Host::MonitorChildProcessCallback callback_copy = callback; |
| ::dispatch_source_set_cancel_handler(source, ^{ |
| dispatch_release(source); |
| }); |
| ::dispatch_source_set_event_handler(source, ^{ |
| |
| int status = 0; |
| int wait_pid = 0; |
| wait_pid = llvm::sys::RetryAfterSignal(-1, ::waitpid, pid, &status, 0); |
| if (wait_pid >= 0) { |
| int signal = 0; |
| int exit_status = 0; |
| const char *status_cstr = NULL; |
| if (WIFEXITED(status)) { |
| exit_status = WEXITSTATUS(status); |
| status_cstr = "EXITED"; |
| } else if (WIFSIGNALED(status)) { |
| signal = WTERMSIG(status); |
| status_cstr = "SIGNALED"; |
| exit_status = -1; |
| } else { |
| llvm_unreachable("Unknown status"); |
| } |
| |
| LLDB_LOGF(log, |
| "::waitpid (pid = %llu, &status, 0) => pid = %i, status " |
| "= 0x%8.8x (%s), signal = %i, exit_status = %i", |
| pid, wait_pid, status, status_cstr, signal, exit_status); |
| |
| if (callback_copy) |
| callback_copy(pid, signal, exit_status); |
| |
| ::dispatch_source_cancel(source); |
| } |
| }); |
| |
| ::dispatch_resume(source); |
| } |
| return HostThread(); |
| } |
