//===-- PlatformNetBSD.cpp ------------------------------------------------===// // // 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 "PlatformNetBSD.h" #include "lldb/Host/Config.h" #include #if LLDB_ENABLE_POSIX #include #endif #include "lldb/Core/Debugger.h" #include "lldb/Core/PluginManager.h" #include "lldb/Host/HostInfo.h" #include "lldb/Target/Process.h" #include "lldb/Target/Target.h" #include "lldb/Utility/FileSpec.h" #include "lldb/Utility/LLDBLog.h" #include "lldb/Utility/Log.h" #include "lldb/Utility/State.h" #include "lldb/Utility/Status.h" #include "lldb/Utility/StreamString.h" // Define these constants from NetBSD mman.h for use when targeting remote // netbsd systems even when host has different values. #define MAP_PRIVATE 0x0002 #define MAP_ANON 0x1000 using namespace lldb; using namespace lldb_private; using namespace lldb_private::platform_netbsd; LLDB_PLUGIN_DEFINE(PlatformNetBSD) static uint32_t g_initialize_count = 0; PlatformSP PlatformNetBSD::CreateInstance(bool force, const ArchSpec *arch) { Log *log = GetLog(LLDBLog::Platform); LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force, arch ? arch->GetArchitectureName() : "", arch ? arch->GetTriple().getTriple() : ""); bool create = force; if (!create && arch && arch->IsValid()) { const llvm::Triple &triple = arch->GetTriple(); switch (triple.getOS()) { case llvm::Triple::NetBSD: create = true; break; default: break; } } LLDB_LOG(log, "create = {0}", create); if (create) { return PlatformSP(new PlatformNetBSD(false)); } return PlatformSP(); } llvm::StringRef PlatformNetBSD::GetPluginDescriptionStatic(bool is_host) { if (is_host) return "Local NetBSD user platform plug-in."; return "Remote NetBSD user platform plug-in."; } void PlatformNetBSD::Initialize() { PlatformPOSIX::Initialize(); if (g_initialize_count++ == 0) { #if defined(__NetBSD__) PlatformSP default_platform_sp(new PlatformNetBSD(true)); default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture()); Platform::SetHostPlatform(default_platform_sp); #endif PluginManager::RegisterPlugin( PlatformNetBSD::GetPluginNameStatic(false), PlatformNetBSD::GetPluginDescriptionStatic(false), PlatformNetBSD::CreateInstance, nullptr); } } void PlatformNetBSD::Terminate() { if (g_initialize_count > 0) { if (--g_initialize_count == 0) { PluginManager::UnregisterPlugin(PlatformNetBSD::CreateInstance); } } PlatformPOSIX::Terminate(); } /// Default Constructor PlatformNetBSD::PlatformNetBSD(bool is_host) : PlatformPOSIX(is_host) // This is the local host platform { if (is_host) { ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault); m_supported_architectures.push_back(hostArch); if (hostArch.GetTriple().isArch64Bit()) { m_supported_architectures.push_back( HostInfo::GetArchitecture(HostInfo::eArchKind32)); } } else { m_supported_architectures = CreateArchList( {llvm::Triple::x86_64, llvm::Triple::x86}, llvm::Triple::NetBSD); } } std::vector PlatformNetBSD::GetSupportedArchitectures(const ArchSpec &process_host_arch) { if (m_remote_platform_sp) return m_remote_platform_sp->GetSupportedArchitectures(process_host_arch); return m_supported_architectures; } void PlatformNetBSD::GetStatus(Stream &strm) { Platform::GetStatus(strm); #if LLDB_ENABLE_POSIX // Display local kernel information only when we are running in host mode. // Otherwise, we would end up printing non-NetBSD information (when running // on Mac OS for example). if (IsHost()) { struct utsname un; if (uname(&un)) return; strm.Printf(" Kernel: %s\n", un.sysname); strm.Printf(" Release: %s\n", un.release); strm.Printf(" Version: %s\n", un.version); } #endif } uint32_t PlatformNetBSD::GetResumeCountForLaunchInfo(ProcessLaunchInfo &launch_info) { uint32_t resume_count = 0; // Always resume past the initial stop when we use eLaunchFlagDebug if (launch_info.GetFlags().Test(eLaunchFlagDebug)) { // Resume past the stop for the final exec into the true inferior. ++resume_count; } // If we're not launching a shell, we're done. const FileSpec &shell = launch_info.GetShell(); if (!shell) return resume_count; std::string shell_string = shell.GetPath(); // We're in a shell, so for sure we have to resume past the shell exec. ++resume_count; // Figure out what shell we're planning on using. const char *shell_name = strrchr(shell_string.c_str(), '/'); if (shell_name == nullptr) shell_name = shell_string.c_str(); else shell_name++; if (strcmp(shell_name, "csh") == 0 || strcmp(shell_name, "tcsh") == 0 || strcmp(shell_name, "zsh") == 0 || strcmp(shell_name, "sh") == 0) { // These shells seem to re-exec themselves. Add another resume. ++resume_count; } return resume_count; } bool PlatformNetBSD::CanDebugProcess() { if (IsHost()) { return true; } else { // If we're connected, we can debug. return IsConnected(); } } void PlatformNetBSD::CalculateTrapHandlerSymbolNames() { m_trap_handlers.push_back(ConstString("_sigtramp")); } MmapArgList PlatformNetBSD::GetMmapArgumentList(const ArchSpec &arch, addr_t addr, addr_t length, unsigned prot, unsigned flags, addr_t fd, addr_t offset) { uint64_t flags_platform = 0; if (flags & eMmapFlagsPrivate) flags_platform |= MAP_PRIVATE; if (flags & eMmapFlagsAnon) flags_platform |= MAP_ANON; MmapArgList args({addr, length, prot, flags_platform, fd, offset}); return args; } CompilerType PlatformNetBSD::GetSiginfoType(const llvm::Triple &triple) { if (!m_type_system_up) m_type_system_up.reset(new TypeSystemClang("siginfo", triple)); TypeSystemClang *ast = m_type_system_up.get(); // generic types CompilerType int_type = ast->GetBasicType(eBasicTypeInt); CompilerType uint_type = ast->GetBasicType(eBasicTypeUnsignedInt); CompilerType long_type = ast->GetBasicType(eBasicTypeLong); CompilerType long_long_type = ast->GetBasicType(eBasicTypeLongLong); CompilerType voidp_type = ast->GetBasicType(eBasicTypeVoid).GetPointerType(); // platform-specific types CompilerType &pid_type = int_type; CompilerType &uid_type = uint_type; CompilerType &clock_type = uint_type; CompilerType &lwpid_type = int_type; CompilerType sigval_type = ast->CreateRecordType( nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_sigval_t", clang::TTK_Union, lldb::eLanguageTypeC); ast->StartTagDeclarationDefinition(sigval_type); ast->AddFieldToRecordType(sigval_type, "sival_int", int_type, lldb::eAccessPublic, 0); ast->AddFieldToRecordType(sigval_type, "sival_ptr", voidp_type, lldb::eAccessPublic, 0); ast->CompleteTagDeclarationDefinition(sigval_type); CompilerType ptrace_option_type = ast->CreateRecordType( nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "", clang::TTK_Union, lldb::eLanguageTypeC); ast->StartTagDeclarationDefinition(ptrace_option_type); ast->AddFieldToRecordType(ptrace_option_type, "_pe_other_pid", pid_type, lldb::eAccessPublic, 0); ast->AddFieldToRecordType(ptrace_option_type, "_pe_lwp", lwpid_type, lldb::eAccessPublic, 0); ast->CompleteTagDeclarationDefinition(ptrace_option_type); // siginfo_t CompilerType siginfo_type = ast->CreateRecordType( nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_siginfo_t", clang::TTK_Union, lldb::eLanguageTypeC); ast->StartTagDeclarationDefinition(siginfo_type); // struct _ksiginfo CompilerType ksiginfo_type = ast->CreateRecordType( nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "", clang::TTK_Struct, lldb::eLanguageTypeC); ast->StartTagDeclarationDefinition(ksiginfo_type); ast->AddFieldToRecordType(ksiginfo_type, "_signo", int_type, lldb::eAccessPublic, 0); ast->AddFieldToRecordType(ksiginfo_type, "_code", int_type, lldb::eAccessPublic, 0); ast->AddFieldToRecordType(ksiginfo_type, "_errno", int_type, lldb::eAccessPublic, 0); // the structure is padded on 64-bit arches to fix alignment if (triple.isArch64Bit()) ast->AddFieldToRecordType(ksiginfo_type, "__pad0", int_type, lldb::eAccessPublic, 0); // union used to hold the signal data CompilerType union_type = ast->CreateRecordType( nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "", clang::TTK_Union, lldb::eLanguageTypeC); ast->StartTagDeclarationDefinition(union_type); ast->AddFieldToRecordType( union_type, "_rt", ast->CreateStructForIdentifier(ConstString(), { {"_pid", pid_type}, {"_uid", uid_type}, {"_value", sigval_type}, }), lldb::eAccessPublic, 0); ast->AddFieldToRecordType( union_type, "_child", ast->CreateStructForIdentifier(ConstString(), { {"_pid", pid_type}, {"_uid", uid_type}, {"_status", int_type}, {"_utime", clock_type}, {"_stime", clock_type}, }), lldb::eAccessPublic, 0); ast->AddFieldToRecordType( union_type, "_fault", ast->CreateStructForIdentifier(ConstString(), { {"_addr", voidp_type}, {"_trap", int_type}, {"_trap2", int_type}, {"_trap3", int_type}, }), lldb::eAccessPublic, 0); ast->AddFieldToRecordType( union_type, "_poll", ast->CreateStructForIdentifier(ConstString(), { {"_band", long_type}, {"_fd", int_type}, }), lldb::eAccessPublic, 0); ast->AddFieldToRecordType(union_type, "_syscall", ast->CreateStructForIdentifier( ConstString(), { {"_sysnum", int_type}, {"_retval", int_type.GetArrayType(2)}, {"_error", int_type}, {"_args", long_long_type.GetArrayType(8)}, }), lldb::eAccessPublic, 0); ast->AddFieldToRecordType( union_type, "_ptrace_state", ast->CreateStructForIdentifier(ConstString(), { {"_pe_report_event", int_type}, {"_option", ptrace_option_type}, }), lldb::eAccessPublic, 0); ast->CompleteTagDeclarationDefinition(union_type); ast->AddFieldToRecordType(ksiginfo_type, "_reason", union_type, lldb::eAccessPublic, 0); ast->CompleteTagDeclarationDefinition(ksiginfo_type); ast->AddFieldToRecordType(siginfo_type, "_info", ksiginfo_type, lldb::eAccessPublic, 0); ast->CompleteTagDeclarationDefinition(siginfo_type); return siginfo_type; }