[lldb][AIX] Added PlatformAIX plugin

lldb/source/Plugins/Platform/AIX/CMakeLists.txt

@@ -0,0 +1,13 @@
+add_definitions("-D_ALL_SOURCE")
+
+add_lldb_library(lldbPluginPlatformAIX PLUGIN
+  PlatformAIX.cpp
+
+   LINK_LIBS
+    lldbBreakpoint
+    lldbCore
+    lldbHost
+    lldbInterpreter
+    lldbTarget
+    lldbPluginPlatformPOSIX
+  )

lldb/source/Plugins/Platform/AIX/PlatformAIX.cpp

@@ -0,0 +1,155 @@
+//===-- PlatformAIX.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 "PlatformAIX.h"
+#include "lldb/Host/Config.h"
+#include <cstdio>
+#if LLDB_ENABLE_POSIX
+#include <sys/utsname.h>
+#endif
+#include "Utility/ARM64_DWARF_Registers.h"
+#include "lldb/Core/Debugger.h"
+#include "lldb/Core/PluginManager.h"
+#include "lldb/Host/HostInfo.h"
+#include "lldb/Symbol/UnwindPlan.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"
+
+// Use defined constants from AIX mman.h for use when targeting remote aix
+// systems even when host has different values.
+
+// For remotely cross debugging aix
+constexpr int MapVariable = 0x0;
+constexpr int MapPrivate = 0x2;
+constexpr int MapAnonymous = 0x10;
+#if defined(_AIX)
+#include <sys/mman.h>
+static_assert(MapVariable == MAP_VARIABLE);
+static_assert(MapPrivate == MAP_PRIVATE);
+static_assert(MapAnonymous = MAP_ANONYMOUS);
+#endif
+
+using namespace lldb;
+using namespace lldb_private;
+using namespace lldb_private::platform_aix;
+
+LLDB_PLUGIN_DEFINE(PlatformAIX)
+
+static uint32_t g_initialize_count = 0;
+
+PlatformSP PlatformAIX::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 || (arch && arch->IsValid() &&
+                          arch->GetTriple().getOS() == llvm::Triple::AIX);
+  LLDB_LOG(log, "create = {0}", create);
+  if (create) {
+    return PlatformSP(new PlatformAIX(false));
+  }
+  return PlatformSP();
+}
+
+llvm::StringRef PlatformAIX::GetPluginDescriptionStatic(bool is_host) {
+  if (is_host)
+    return "Local AIX user platform plug-in.";
+  return "Remote AIX user platform plug-in.";
+}
+
+void PlatformAIX::Initialize() {
+  PlatformPOSIX::Initialize();
+
+  if (g_initialize_count++ == 0) {
+#ifdef _AIX
+    PlatformSP default_platform_sp(new PlatformAIX(true));
+    default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
+    Platform::SetHostPlatform(default_platform_sp);
+#endif
+    PluginManager::RegisterPlugin(
+        PlatformAIX::GetPluginNameStatic(false),
+        PlatformAIX::GetPluginDescriptionStatic(false),
+        PlatformAIX::CreateInstance, nullptr);
+  }
+}
+
+void PlatformAIX::Terminate() {
+  if (g_initialize_count > 0)
+    if (--g_initialize_count == 0)
+      PluginManager::UnregisterPlugin(PlatformAIX::CreateInstance);
+
+  PlatformPOSIX::Terminate();
+}
+
+PlatformAIX::PlatformAIX(bool is_host) : PlatformPOSIX(is_host) {
+  if (is_host) {
+    ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
+    m_supported_architectures.push_back(hostArch);
+  } else {
+    m_supported_architectures =
+        CreateArchList({llvm::Triple::ppc64}, llvm::Triple::AIX);
+  }
+}
+
+std::vector<ArchSpec>
+PlatformAIX::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 PlatformAIX::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-AIX 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
+}
+
+void PlatformAIX::CalculateTrapHandlerSymbolNames() {}
+
+lldb::UnwindPlanSP
+PlatformAIX::GetTrapHandlerUnwindPlan(const llvm::Triple &triple,
+                                      ConstString name) {
+  return {};
+}
+
+MmapArgList PlatformAIX::GetMmapArgumentList(const ArchSpec &arch, addr_t addr,
+                                             addr_t length, unsigned prot,
+                                             unsigned flags, addr_t fd,
+                                             addr_t offset) {
+  unsigned flags_platform = 0;
+#if defined(_AIX)
+  flags_platform = MapPrivate | MapVariable | MapAnon;
+#endif
+  MmapArgList args({addr, length, prot, flags_platform, fd, offset});
+  return args;
+}
+
+CompilerType PlatformAIX::GetSiginfoType(const llvm::Triple &triple) {
+  return CompilerType();
+}

lldb/source/Plugins/Platform/AIX/PlatformAIX.h

@@ -0,0 +1,70 @@
+//===-- PlatformAIX.h -----------------------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_SOURCE_PLUGINS_PLATFORM_AIX_PLATFORMAIX_H
+#define LLDB_SOURCE_PLUGINS_PLATFORM_AIX_PLATFORMAIX_H
+
+#include "Plugins/Platform/POSIX/PlatformPOSIX.h"
+#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
+
+namespace lldb_private {
+namespace platform_aix {
+
+class PlatformAIX : public PlatformPOSIX {
+public:
+  PlatformAIX(bool is_host);
+
+  static void Initialize();
+
+  static void Terminate();
+
+  // lldb_private::PluginInterface functions
+  static lldb::PlatformSP CreateInstance(bool force, const ArchSpec *arch);
+
+  static llvm::StringRef GetPluginNameStatic(bool is_host) {
+    return is_host ? Platform::GetHostPlatformName() : "remote-AIX";
+  }
+
+  static llvm::StringRef GetPluginDescriptionStatic(bool is_host);
+
+  llvm::StringRef GetPluginName() override {
+    return GetPluginNameStatic(IsHost());
+  }
+
+  // lldb_private::Platform functions
+  llvm::StringRef GetDescription() override {
+    return GetPluginDescriptionStatic(IsHost());
+  }
+
+  void GetStatus(Stream &strm) override;
+
+  std::vector<ArchSpec>
+  GetSupportedArchitectures(const ArchSpec &process_host_arch) override;
+
+  void CalculateTrapHandlerSymbolNames() override;
+
+  lldb::UnwindPlanSP GetTrapHandlerUnwindPlan(const llvm::Triple &triple,
+                                              ConstString name) override;
+
+  MmapArgList GetMmapArgumentList(const ArchSpec &arch, lldb::addr_t addr,
+                                  lldb::addr_t length, unsigned prot,
+                                  unsigned flags, lldb::addr_t fd,
+                                  lldb::addr_t offset) override;
+
+  CompilerType GetSiginfoType(const llvm::Triple &triple) override;
+
+  std::vector<ArchSpec> m_supported_architectures;
+
+private:
+  std::unique_ptr<TypeSystemClang> m_type_system_up;
+};
+
+} // namespace platform_aix
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_PLATFORM_AIX_PLATFORMAIX_H

lldb/source/Plugins/Platform/CMakeLists.txt

@@ -1,3 +1,4 @@
+add_subdirectory(AIX)
 add_subdirectory(Android)
 add_subdirectory(FreeBSD)
 add_subdirectory(gdb-server)