[Lldb-commits] [lldb] [lldb][AIX] Added PlatformAIX plugin (PR #121273)

[Dhruv Srivastava via lldb-commits]

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@@ -0,0 +1,370 @@
+//===-- 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.
+
+#if defined(_AIX)
+#include <sys/mman.h>
+#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;
+  if (!create && arch && arch->IsValid()) {
+    const llvm::Triple &triple = arch->GetTriple();
+    switch (triple.getOS()) {
+    case llvm::Triple::AIX:
+      create = true;
+      break;
+
+    default:
+      break;
+    }
+  }
+
+  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();
+}
+
+/// Default Constructor
+PlatformAIX::PlatformAIX(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::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
+}
+
+uint32_t
+PlatformAIX::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 PlatformAIX::CanDebugProcess() {
+  if (IsHost()) {
+    return true;
+  } else {
+    // If we're connected, we can debug.
+    return IsConnected();
+  }
+}
+
+void PlatformAIX::CalculateTrapHandlerSymbolNames() {
+  m_trap_handlers.push_back(ConstString("_sigtramp"));
+  m_trap_handlers.push_back(ConstString("__kernel_rt_sigreturn"));
+  m_trap_handlers.push_back(ConstString("__restore_rt"));
----------------
DhruvSrivastavaX wrote:

Yes, working on updating accordingly

https://github.com/llvm/llvm-project/pull/121273