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Diffstat (limited to 'contrib/llvm-project/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp')
| -rw-r--r-- | contrib/llvm-project/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/contrib/llvm-project/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp b/contrib/llvm-project/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp new file mode 100644 index 000000000000..d7584be2b95e --- /dev/null +++ b/contrib/llvm-project/lldb/source/Plugins/Platform/FreeBSD/PlatformFreeBSD.cpp @@ -0,0 +1,284 @@ +//===-- PlatformFreeBSD.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 "PlatformFreeBSD.h" +#include "lldb/Host/Config.h" + +#include <cstdio> +#if LLDB_ENABLE_POSIX +#include <sys/utsname.h> +#endif + +#include "lldb/Breakpoint/BreakpointLocation.h" +#include "lldb/Breakpoint/BreakpointSite.h" +#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" + +#include "llvm/TargetParser/Host.h" +#include "llvm/TargetParser/Triple.h" + +// Define these constants from FreeBSD mman.h for use when targeting remote +// FreeBSD 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_freebsd; + +LLDB_PLUGIN_DEFINE(PlatformFreeBSD) + +static uint32_t g_initialize_count = 0; + + +PlatformSP PlatformFreeBSD::CreateInstance(bool force, const ArchSpec *arch) { + Log *log = GetLog(LLDBLog::Platform); + LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force, + arch ? arch->GetArchitectureName() : "<null>", + arch ? arch->GetTriple().getTriple() : "<null>"); + + bool create = force; + if (!create && arch && arch->IsValid()) { + const llvm::Triple &triple = arch->GetTriple(); + switch (triple.getOS()) { + case llvm::Triple::FreeBSD: + create = true; + break; + +#if defined(__FreeBSD__) + // Only accept "unknown" for the OS if the host is BSD and it "unknown" + // wasn't specified (it was just returned because it was NOT specified) + case llvm::Triple::OSType::UnknownOS: + create = !arch->TripleOSWasSpecified(); + break; +#endif + default: + break; + } + } + LLDB_LOG(log, "create = {0}", create); + if (create) { + return PlatformSP(new PlatformFreeBSD(false)); + } + return PlatformSP(); +} + +llvm::StringRef PlatformFreeBSD::GetPluginDescriptionStatic(bool is_host) { + if (is_host) + return "Local FreeBSD user platform plug-in."; + return "Remote FreeBSD user platform plug-in."; +} + +void PlatformFreeBSD::Initialize() { + Platform::Initialize(); + + if (g_initialize_count++ == 0) { +#if defined(__FreeBSD__) + PlatformSP default_platform_sp(new PlatformFreeBSD(true)); + default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture()); + Platform::SetHostPlatform(default_platform_sp); +#endif + PluginManager::RegisterPlugin( + PlatformFreeBSD::GetPluginNameStatic(false), + PlatformFreeBSD::GetPluginDescriptionStatic(false), + PlatformFreeBSD::CreateInstance, nullptr); + } +} + +void PlatformFreeBSD::Terminate() { + if (g_initialize_count > 0) { + if (--g_initialize_count == 0) { + PluginManager::UnregisterPlugin(PlatformFreeBSD::CreateInstance); + } + } + + PlatformPOSIX::Terminate(); +} + +/// Default Constructor +PlatformFreeBSD::PlatformFreeBSD(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::aarch64, + llvm::Triple::arm, llvm::Triple::mips64, llvm::Triple::ppc64, + llvm::Triple::ppc}, + llvm::Triple::FreeBSD); + } +} + +std::vector<ArchSpec> +PlatformFreeBSD::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 PlatformFreeBSD::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-FreeBSD 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 +} + +bool PlatformFreeBSD::CanDebugProcess() { + if (IsHost()) { + return true; + } else { + // If we're connected, we can debug. + return IsConnected(); + } +} + +void PlatformFreeBSD::CalculateTrapHandlerSymbolNames() { + m_trap_handlers.push_back(ConstString("_sigtramp")); +} + +MmapArgList PlatformFreeBSD::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}); + if (arch.GetTriple().getArch() == llvm::Triple::x86) + args.push_back(0); + return args; +} + +CompilerType PlatformFreeBSD::GetSiginfoType(const llvm::Triple &triple) { + { + std::lock_guard<std::mutex> guard(m_mutex); + if (!m_type_system) + m_type_system = std::make_shared<TypeSystemClang>("siginfo", triple); + } + TypeSystemClang *ast = m_type_system.get(); + + // generic types + CompilerType int_type = ast->GetBasicType(eBasicTypeInt); + CompilerType uint_type = ast->GetBasicType(eBasicTypeUnsignedInt); + CompilerType long_type = ast->GetBasicType(eBasicTypeLong); + CompilerType voidp_type = ast->GetBasicType(eBasicTypeVoid).GetPointerType(); + + // platform-specific types + CompilerType &pid_type = int_type; + CompilerType &uid_type = uint_type; + + CompilerType sigval_type = ast->CreateRecordType( + nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_sigval_t", + llvm::to_underlying(clang::TagTypeKind::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); + + // siginfo_t + CompilerType siginfo_type = ast->CreateRecordType( + nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_siginfo_t", + llvm::to_underlying(clang::TagTypeKind::Struct), lldb::eLanguageTypeC); + ast->StartTagDeclarationDefinition(siginfo_type); + ast->AddFieldToRecordType(siginfo_type, "si_signo", int_type, + lldb::eAccessPublic, 0); + ast->AddFieldToRecordType(siginfo_type, "si_errno", int_type, + lldb::eAccessPublic, 0); + ast->AddFieldToRecordType(siginfo_type, "si_code", int_type, + lldb::eAccessPublic, 0); + ast->AddFieldToRecordType(siginfo_type, "si_pid", pid_type, + lldb::eAccessPublic, 0); + ast->AddFieldToRecordType(siginfo_type, "si_uid", uid_type, + lldb::eAccessPublic, 0); + ast->AddFieldToRecordType(siginfo_type, "si_status", int_type, + lldb::eAccessPublic, 0); + ast->AddFieldToRecordType(siginfo_type, "si_addr", voidp_type, + lldb::eAccessPublic, 0); + ast->AddFieldToRecordType(siginfo_type, "si_value", sigval_type, + lldb::eAccessPublic, 0); + + // union used to hold the signal data + CompilerType union_type = ast->CreateRecordType( + nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "", + llvm::to_underlying(clang::TagTypeKind::Union), lldb::eLanguageTypeC); + ast->StartTagDeclarationDefinition(union_type); + + ast->AddFieldToRecordType( + union_type, "_fault", + ast->CreateStructForIdentifier(llvm::StringRef(), + { + {"_trapno", int_type}, + }), + lldb::eAccessPublic, 0); + + ast->AddFieldToRecordType( + union_type, "_timer", + ast->CreateStructForIdentifier(llvm::StringRef(), + { + {"_timerid", int_type}, + {"_overrun", int_type}, + }), + lldb::eAccessPublic, 0); + + ast->AddFieldToRecordType( + union_type, "_mesgq", + ast->CreateStructForIdentifier(llvm::StringRef(), + { + {"_mqd", int_type}, + }), + lldb::eAccessPublic, 0); + + ast->AddFieldToRecordType( + union_type, "_poll", + ast->CreateStructForIdentifier(llvm::StringRef(), + { + {"_band", long_type}, + }), + lldb::eAccessPublic, 0); + + ast->CompleteTagDeclarationDefinition(union_type); + ast->AddFieldToRecordType(siginfo_type, "_reason", union_type, + lldb::eAccessPublic, 0); + + ast->CompleteTagDeclarationDefinition(siginfo_type); + return siginfo_type; +} |