a5f759ed9d
This PR is in reference to porting LLDB on AIX. Link to discussions on llvm discourse and github: 1. https://discourse.llvm.org/t/port-lldb-to-ibm-aix/80640 2. https://github.com/llvm/llvm-project/issues/101657 The complete changes for porting are present in this draft PR: https://github.com/llvm/llvm-project/pull/102601 Details: -------------- Adding PlatformAIX plugin for a basic lldb build support. The 1st commit is the original version as in the draft PR which is a PlatformLinux copy. I have removed some of the code in the next commits. Please let me know all the other changes required to push the PlatformAIX changes and avoid any duplication.
159 lines
4.8 KiB
C++
159 lines
4.8 KiB
C++
//===-- PlatformAIX.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 "PlatformAIX.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 "Utility/ARM64_DWARF_Registers.h"
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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/Symbol/UnwindPlan.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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// Use defined constants from AIX mman.h for use when targeting remote aix
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// systems even when host has different values.
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// For remotely cross debugging aix
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constexpr int MapVariable = 0x0;
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constexpr int MapPrivate = 0x2;
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constexpr int MapAnonymous = 0x10;
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#if defined(_AIX)
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#include <sys/mman.h>
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static_assert(MapVariable == MAP_VARIABLE);
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static_assert(MapPrivate == MAP_PRIVATE);
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static_assert(MapAnonymous == MAP_ANONYMOUS);
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#endif
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::platform_aix;
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LLDB_PLUGIN_DEFINE(PlatformAIX)
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static uint32_t g_initialize_count = 0;
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PlatformSP PlatformAIX::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 || (arch && arch->IsValid() &&
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arch->GetTriple().getOS() == llvm::Triple::AIX);
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LLDB_LOG(log, "create = {0}", create);
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if (create) {
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return PlatformSP(new PlatformAIX(false));
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}
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return PlatformSP();
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}
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llvm::StringRef PlatformAIX::GetPluginDescriptionStatic(bool is_host) {
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if (is_host)
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return "Local AIX user platform plug-in.";
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return "Remote AIX user platform plug-in.";
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}
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void PlatformAIX::Initialize() {
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PlatformPOSIX::Initialize();
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if (g_initialize_count++ == 0) {
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#ifdef _AIX
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PlatformSP default_platform_sp(new PlatformAIX(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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PlatformAIX::GetPluginNameStatic(false),
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PlatformAIX::GetPluginDescriptionStatic(false),
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PlatformAIX::CreateInstance, nullptr);
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}
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}
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void PlatformAIX::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(PlatformAIX::CreateInstance);
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PlatformPOSIX::Terminate();
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}
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PlatformAIX::PlatformAIX(bool is_host) : PlatformPOSIX(is_host) {
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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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} else {
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m_supported_architectures =
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CreateArchList({llvm::Triple::ppc64}, llvm::Triple::AIX);
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}
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}
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std::vector<ArchSpec>
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PlatformAIX::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 PlatformAIX::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-AIX information (when running on
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// 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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void PlatformAIX::CalculateTrapHandlerSymbolNames() {}
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lldb::UnwindPlanSP
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PlatformAIX::GetTrapHandlerUnwindPlan(const llvm::Triple &triple,
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ConstString name) {
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return {};
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}
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MmapArgList PlatformAIX::GetMmapArgumentList(const ArchSpec &arch, addr_t addr,
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addr_t length, unsigned prot,
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unsigned flags, addr_t fd,
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addr_t offset) {
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unsigned flags_platform = MapVariable;
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if (flags & eMmapFlagsPrivate)
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flags_platform |= MapPrivate;
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if (flags & eMmapFlagsAnon)
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flags_platform |= MapAnonymous;
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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 PlatformAIX::GetSiginfoType(const llvm::Triple &triple) {
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return CompilerType();
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}
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