348 lines
12 KiB
C++
348 lines
12 KiB
C++
//===-- PlatformNetBSD.cpp ------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "PlatformNetBSD.h"
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#include "lldb/Host/Config.h"
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#include <cstdio>
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#if LLDB_ENABLE_POSIX
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#include <sys/utsname.h>
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#endif
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Host/HostInfo.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/Utility/LLDBLog.h"
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#include "lldb/Utility/Log.h"
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#include "lldb/Utility/State.h"
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#include "lldb/Utility/Status.h"
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#include "lldb/Utility/StreamString.h"
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// Define these constants from NetBSD mman.h for use when targeting remote
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// netbsd systems even when host has different values.
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#define MAP_PRIVATE 0x0002
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#define MAP_ANON 0x1000
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::platform_netbsd;
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LLDB_PLUGIN_DEFINE(PlatformNetBSD)
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static uint32_t g_initialize_count = 0;
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PlatformSP PlatformNetBSD::CreateInstance(bool force, const ArchSpec *arch) {
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Log *log = GetLog(LLDBLog::Platform);
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LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force,
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arch ? arch->GetArchitectureName() : "<null>",
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arch ? arch->GetTriple().getTriple() : "<null>");
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bool create = force;
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if (!create && arch && arch->IsValid()) {
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const llvm::Triple &triple = arch->GetTriple();
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switch (triple.getOS()) {
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case llvm::Triple::NetBSD:
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create = true;
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break;
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default:
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break;
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}
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}
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LLDB_LOG(log, "create = {0}", create);
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if (create) {
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return PlatformSP(new PlatformNetBSD(false));
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}
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return PlatformSP();
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}
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llvm::StringRef PlatformNetBSD::GetPluginDescriptionStatic(bool is_host) {
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if (is_host)
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return "Local NetBSD user platform plug-in.";
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return "Remote NetBSD user platform plug-in.";
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}
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void PlatformNetBSD::Initialize() {
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PlatformPOSIX::Initialize();
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if (g_initialize_count++ == 0) {
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#if defined(__NetBSD__)
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PlatformSP default_platform_sp(new PlatformNetBSD(true));
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default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
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Platform::SetHostPlatform(default_platform_sp);
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#endif
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PluginManager::RegisterPlugin(
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PlatformNetBSD::GetPluginNameStatic(false),
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PlatformNetBSD::GetPluginDescriptionStatic(false),
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PlatformNetBSD::CreateInstance, nullptr);
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}
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}
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void PlatformNetBSD::Terminate() {
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if (g_initialize_count > 0) {
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if (--g_initialize_count == 0) {
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PluginManager::UnregisterPlugin(PlatformNetBSD::CreateInstance);
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}
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}
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PlatformPOSIX::Terminate();
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}
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/// Default Constructor
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PlatformNetBSD::PlatformNetBSD(bool is_host)
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: PlatformPOSIX(is_host) // This is the local host platform
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{
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if (is_host) {
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ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
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m_supported_architectures.push_back(hostArch);
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if (hostArch.GetTriple().isArch64Bit()) {
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m_supported_architectures.push_back(
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HostInfo::GetArchitecture(HostInfo::eArchKind32));
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}
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} else {
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m_supported_architectures = CreateArchList(
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{llvm::Triple::x86_64, llvm::Triple::x86}, llvm::Triple::NetBSD);
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}
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}
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std::vector<ArchSpec>
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PlatformNetBSD::GetSupportedArchitectures(const ArchSpec &process_host_arch) {
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if (m_remote_platform_sp)
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return m_remote_platform_sp->GetSupportedArchitectures(process_host_arch);
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return m_supported_architectures;
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}
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void PlatformNetBSD::GetStatus(Stream &strm) {
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Platform::GetStatus(strm);
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#if LLDB_ENABLE_POSIX
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// Display local kernel information only when we are running in host mode.
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// Otherwise, we would end up printing non-NetBSD information (when running
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// on Mac OS for example).
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if (IsHost()) {
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struct utsname un;
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if (uname(&un))
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return;
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strm.Printf(" Kernel: %s\n", un.sysname);
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strm.Printf(" Release: %s\n", un.release);
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strm.Printf(" Version: %s\n", un.version);
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}
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#endif
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}
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uint32_t
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PlatformNetBSD::GetResumeCountForLaunchInfo(ProcessLaunchInfo &launch_info) {
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uint32_t resume_count = 0;
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// Always resume past the initial stop when we use eLaunchFlagDebug
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if (launch_info.GetFlags().Test(eLaunchFlagDebug)) {
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// Resume past the stop for the final exec into the true inferior.
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++resume_count;
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}
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// If we're not launching a shell, we're done.
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const FileSpec &shell = launch_info.GetShell();
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if (!shell)
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return resume_count;
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std::string shell_string = shell.GetPath();
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// We're in a shell, so for sure we have to resume past the shell exec.
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++resume_count;
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// Figure out what shell we're planning on using.
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const char *shell_name = strrchr(shell_string.c_str(), '/');
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if (shell_name == nullptr)
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shell_name = shell_string.c_str();
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else
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shell_name++;
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if (strcmp(shell_name, "csh") == 0 || strcmp(shell_name, "tcsh") == 0 ||
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strcmp(shell_name, "zsh") == 0 || strcmp(shell_name, "sh") == 0) {
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// These shells seem to re-exec themselves. Add another resume.
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++resume_count;
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}
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return resume_count;
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}
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bool PlatformNetBSD::CanDebugProcess() {
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if (IsHost()) {
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return true;
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} else {
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// If we're connected, we can debug.
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return IsConnected();
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}
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}
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void PlatformNetBSD::CalculateTrapHandlerSymbolNames() {
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m_trap_handlers.push_back(ConstString("_sigtramp"));
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}
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MmapArgList PlatformNetBSD::GetMmapArgumentList(const ArchSpec &arch,
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addr_t addr, addr_t length,
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unsigned prot, unsigned flags,
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addr_t fd, addr_t offset) {
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uint64_t flags_platform = 0;
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if (flags & eMmapFlagsPrivate)
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flags_platform |= MAP_PRIVATE;
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if (flags & eMmapFlagsAnon)
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flags_platform |= MAP_ANON;
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MmapArgList args({addr, length, prot, flags_platform, fd, offset});
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return args;
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}
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CompilerType PlatformNetBSD::GetSiginfoType(const llvm::Triple &triple) {
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if (!m_type_system_up)
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m_type_system_up.reset(new TypeSystemClang("siginfo", triple));
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TypeSystemClang *ast = m_type_system_up.get();
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// generic types
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CompilerType int_type = ast->GetBasicType(eBasicTypeInt);
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CompilerType uint_type = ast->GetBasicType(eBasicTypeUnsignedInt);
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CompilerType long_type = ast->GetBasicType(eBasicTypeLong);
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CompilerType long_long_type = ast->GetBasicType(eBasicTypeLongLong);
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CompilerType voidp_type = ast->GetBasicType(eBasicTypeVoid).GetPointerType();
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// platform-specific types
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CompilerType &pid_type = int_type;
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CompilerType &uid_type = uint_type;
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CompilerType &clock_type = uint_type;
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CompilerType &lwpid_type = int_type;
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CompilerType sigval_type = ast->CreateRecordType(
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nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_sigval_t",
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clang::TTK_Union, lldb::eLanguageTypeC);
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ast->StartTagDeclarationDefinition(sigval_type);
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ast->AddFieldToRecordType(sigval_type, "sival_int", int_type,
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(sigval_type, "sival_ptr", voidp_type,
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lldb::eAccessPublic, 0);
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ast->CompleteTagDeclarationDefinition(sigval_type);
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CompilerType ptrace_option_type = ast->CreateRecordType(
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nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "",
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clang::TTK_Union, lldb::eLanguageTypeC);
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ast->StartTagDeclarationDefinition(ptrace_option_type);
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ast->AddFieldToRecordType(ptrace_option_type, "_pe_other_pid", pid_type,
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(ptrace_option_type, "_pe_lwp", lwpid_type,
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lldb::eAccessPublic, 0);
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ast->CompleteTagDeclarationDefinition(ptrace_option_type);
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// siginfo_t
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CompilerType siginfo_type = ast->CreateRecordType(
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nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_siginfo_t",
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clang::TTK_Union, lldb::eLanguageTypeC);
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ast->StartTagDeclarationDefinition(siginfo_type);
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// struct _ksiginfo
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CompilerType ksiginfo_type = ast->CreateRecordType(
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nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "",
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clang::TTK_Struct, lldb::eLanguageTypeC);
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ast->StartTagDeclarationDefinition(ksiginfo_type);
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ast->AddFieldToRecordType(ksiginfo_type, "_signo", int_type,
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(ksiginfo_type, "_code", int_type,
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(ksiginfo_type, "_errno", int_type,
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lldb::eAccessPublic, 0);
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// the structure is padded on 64-bit arches to fix alignment
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if (triple.isArch64Bit())
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ast->AddFieldToRecordType(ksiginfo_type, "__pad0", int_type,
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lldb::eAccessPublic, 0);
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// union used to hold the signal data
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CompilerType union_type = ast->CreateRecordType(
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nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "",
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clang::TTK_Union, lldb::eLanguageTypeC);
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ast->StartTagDeclarationDefinition(union_type);
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ast->AddFieldToRecordType(
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union_type, "_rt",
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ast->CreateStructForIdentifier(ConstString(),
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{
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{"_pid", pid_type},
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{"_uid", uid_type},
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{"_value", sigval_type},
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}),
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(
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union_type, "_child",
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ast->CreateStructForIdentifier(ConstString(),
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{
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{"_pid", pid_type},
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{"_uid", uid_type},
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{"_status", int_type},
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{"_utime", clock_type},
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{"_stime", clock_type},
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}),
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(
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union_type, "_fault",
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ast->CreateStructForIdentifier(ConstString(),
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{
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{"_addr", voidp_type},
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{"_trap", int_type},
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{"_trap2", int_type},
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{"_trap3", int_type},
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}),
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(
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union_type, "_poll",
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ast->CreateStructForIdentifier(ConstString(),
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{
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{"_band", long_type},
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{"_fd", int_type},
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}),
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(union_type, "_syscall",
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ast->CreateStructForIdentifier(
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ConstString(),
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{
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{"_sysnum", int_type},
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{"_retval", int_type.GetArrayType(2)},
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{"_error", int_type},
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{"_args", long_long_type.GetArrayType(8)},
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}),
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lldb::eAccessPublic, 0);
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ast->AddFieldToRecordType(
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union_type, "_ptrace_state",
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ast->CreateStructForIdentifier(ConstString(),
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{
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{"_pe_report_event", int_type},
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{"_option", ptrace_option_type},
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}),
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lldb::eAccessPublic, 0);
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ast->CompleteTagDeclarationDefinition(union_type);
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ast->AddFieldToRecordType(ksiginfo_type, "_reason", union_type,
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lldb::eAccessPublic, 0);
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ast->CompleteTagDeclarationDefinition(ksiginfo_type);
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ast->AddFieldToRecordType(siginfo_type, "_info", ksiginfo_type,
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lldb::eAccessPublic, 0);
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ast->CompleteTagDeclarationDefinition(siginfo_type);
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return siginfo_type;
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}
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