[Lldb-commits] [lldb] [lldb][AIX] HostInfoAIX Support (PR #117906)
Dhruv Srivastava via lldb-commits
lldb-commits at lists.llvm.org
Fri Dec 27 02:50:45 PST 2024
https://github.com/DhruvSrivastavaX updated https://github.com/llvm/llvm-project/pull/117906
>From d05de47c87362b54760f65c294c30c80b2d5bc9b Mon Sep 17 00:00:00 2001
From: Dhruv-Srivastava <dhruv.srivastava at ibm.com>
Date: Wed, 27 Nov 2024 10:10:32 -0600
Subject: [PATCH] HostInfoAIX
---
lldb/include/lldb/Host/aix/HostInfoAIX.h | 43 +++++
lldb/source/Host/CMakeLists.txt | 5 +
lldb/source/Host/aix/HostInfoAIX.cpp | 213 +++++++++++++++++++++++
3 files changed, 261 insertions(+)
create mode 100644 lldb/include/lldb/Host/aix/HostInfoAIX.h
create mode 100644 lldb/source/Host/aix/HostInfoAIX.cpp
diff --git a/lldb/include/lldb/Host/aix/HostInfoAIX.h b/lldb/include/lldb/Host/aix/HostInfoAIX.h
new file mode 100644
index 00000000000000..c797b36f3dcc8d
--- /dev/null
+++ b/lldb/include/lldb/Host/aix/HostInfoAIX.h
@@ -0,0 +1,43 @@
+//===-- HostInfoAIX.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_HOST_AIX_HOSTINFOAIX_H_
+#define LLDB_HOST_AIX_HOSTINFOAIX_H_
+
+#include "lldb/Host/posix/HostInfoPosix.h"
+#include "lldb/Utility/FileSpec.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/VersionTuple.h"
+
+#include <optional>
+#include <string>
+
+namespace lldb_private {
+
+class HostInfoAIX : public HostInfoPosix {
+ friend class HostInfoBase;
+
+public:
+ static void Initialize(SharedLibraryDirectoryHelper *helper = nullptr);
+ static void Terminate();
+
+ static llvm::VersionTuple GetOSVersion();
+ static std::optional<std::string> GetOSBuildString();
+ static llvm::StringRef GetDistributionId();
+ static FileSpec GetProgramFileSpec();
+
+protected:
+ static bool ComputeSupportExeDirectory(FileSpec &file_spec);
+ static bool ComputeSystemPluginsDirectory(FileSpec &file_spec);
+ static bool ComputeUserPluginsDirectory(FileSpec &file_spec);
+ static void ComputeHostArchitectureSupport(ArchSpec &arch_32,
+ ArchSpec &arch_64);
+};
+} // namespace lldb_private
+
+#endif // LLDB_HOST_AIX_HOSTINFOAIX_H_
diff --git a/lldb/source/Host/CMakeLists.txt b/lldb/source/Host/CMakeLists.txt
index c2e091ee8555b7..e0cd8569bf9575 100644
--- a/lldb/source/Host/CMakeLists.txt
+++ b/lldb/source/Host/CMakeLists.txt
@@ -133,6 +133,11 @@ else()
openbsd/Host.cpp
openbsd/HostInfoOpenBSD.cpp
)
+
+ elseif (CMAKE_SYSTEM_NAME MATCHES "AIX")
+ add_host_subdirectory(aix
+ aix/HostInfoAIX.cpp
+ )
endif()
endif()
diff --git a/lldb/source/Host/aix/HostInfoAIX.cpp b/lldb/source/Host/aix/HostInfoAIX.cpp
new file mode 100644
index 00000000000000..e43ab3afd94657
--- /dev/null
+++ b/lldb/source/Host/aix/HostInfoAIX.cpp
@@ -0,0 +1,213 @@
+//===-- HostInfoAIX.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 "lldb/Host/aix/HostInfoAIX.h"
+#include "lldb/Host/Config.h"
+#include "lldb/Host/FileSystem.h"
+#include "lldb/Utility/LLDBLog.h"
+#include "lldb/Utility/Log.h"
+
+#include "llvm/Support/Threading.h"
+
+#include <climits>
+#include <cstdio>
+#include <cstring>
+#include <sys/utsname.h>
+#include <unistd.h>
+
+#include <algorithm>
+#include <mutex>
+#include <optional>
+
+using namespace lldb_private;
+
+namespace {
+struct HostInfoAIXFields {
+ llvm::once_flag m_distribution_once_flag;
+ std::string m_distribution_id;
+ llvm::once_flag m_os_version_once_flag;
+ llvm::VersionTuple m_os_version;
+};
+} // namespace
+
+static HostInfoAIXFields *g_fields = nullptr;
+
+void HostInfoAIX::Initialize(SharedLibraryDirectoryHelper *helper) {
+ HostInfoPosix::Initialize(helper);
+
+ g_fields = new HostInfoAIXFields();
+}
+
+void HostInfoAIX::Terminate() {
+ assert(g_fields && "Missing call to Initialize?");
+ delete g_fields;
+ g_fields = nullptr;
+ HostInfoBase::Terminate();
+}
+
+llvm::VersionTuple HostInfoAIX::GetOSVersion() {
+ assert(g_fields && "Missing call to Initialize?");
+ llvm::call_once(g_fields->m_os_version_once_flag, []() {
+ struct utsname un;
+ if (uname(&un) != 0)
+ return;
+
+ llvm::StringRef release = un.release;
+ // The kernel release string can include a lot of stuff (e.g.
+ // 4.9.0-6-amd64). We're only interested in the numbered prefix.
+ release = release.substr(0, release.find_first_not_of("0123456789."));
+ g_fields->m_os_version.tryParse(release);
+ });
+
+ return g_fields->m_os_version;
+}
+
+std::optional<std::string> HostInfoAIX::GetOSBuildString() {
+ struct utsname un;
+ ::memset(&un, 0, sizeof(utsname));
+
+ if (uname(&un) < 0)
+ return std::nullopt;
+
+ return std::string(un.release);
+}
+
+llvm::StringRef HostInfoAIX::GetDistributionId() {
+ assert(g_fields && "Missing call to Initialize?");
+ // Try to run 'lbs_release -i', and use that response for the distribution
+ // id.
+ llvm::call_once(g_fields->m_distribution_once_flag, []() {
+ Log *log = GetLog(LLDBLog::Host);
+ LLDB_LOGF(log, "attempting to determine AIX distribution...");
+
+ // check if the lsb_release command exists at one of the following paths
+ const char *const exe_paths[] = {"/bin/lsb_release",
+ "/usr/bin/lsb_release"};
+
+ for (size_t exe_index = 0;
+ exe_index < sizeof(exe_paths) / sizeof(exe_paths[0]); ++exe_index) {
+ const char *const get_distribution_info_exe = exe_paths[exe_index];
+ if (access(get_distribution_info_exe, F_OK)) {
+ // this exe doesn't exist, move on to next exe
+ LLDB_LOGF(log, "executable doesn't exist: %s",
+ get_distribution_info_exe);
+ continue;
+ }
+
+ // execute the distribution-retrieval command, read output
+ std::string get_distribution_id_command(get_distribution_info_exe);
+ get_distribution_id_command += " -i";
+
+ FILE *file = popen(get_distribution_id_command.c_str(), "r");
+ if (!file) {
+ LLDB_LOGF(log,
+ "failed to run command: \"%s\", cannot retrieve "
+ "platform information",
+ get_distribution_id_command.c_str());
+ break;
+ }
+
+ // retrieve the distribution id string.
+ char distribution_id[256] = {'\0'};
+ if (fgets(distribution_id, sizeof(distribution_id) - 1, file) !=
+ nullptr) {
+ LLDB_LOGF(log, "distribution id command returned \"%s\"",
+ distribution_id);
+
+ const char *const distributor_id_key = "Distributor ID:\t";
+ if (strstr(distribution_id, distributor_id_key)) {
+ // strip newlines
+ std::string id_string(distribution_id + strlen(distributor_id_key));
+ llvm::erase(id_string, '\n');
+
+ // lower case it and convert whitespace to underscores
+ std::transform(
+ id_string.begin(), id_string.end(), id_string.begin(),
+ [](char ch) { return tolower(isspace(ch) ? '_' : ch); });
+
+ g_fields->m_distribution_id = id_string;
+ LLDB_LOGF(log, "distribution id set to \"%s\"",
+ g_fields->m_distribution_id.c_str());
+ } else {
+ LLDB_LOGF(log, "failed to find \"%s\" field in \"%s\"",
+ distributor_id_key, distribution_id);
+ }
+ } else {
+ LLDB_LOGF(log,
+ "failed to retrieve distribution id, \"%s\" returned no"
+ " lines",
+ get_distribution_id_command.c_str());
+ }
+
+ // clean up the file
+ pclose(file);
+ }
+ });
+
+ return g_fields->m_distribution_id;
+}
+
+FileSpec HostInfoAIX::GetProgramFileSpec() {
+ static FileSpec g_program_filespec;
+
+ if (!g_program_filespec) {
+ char exe_path[PATH_MAX];
+ ssize_t len = readlink("/proc/self/exe", exe_path, sizeof(exe_path) - 1);
+ if (len > 0) {
+ exe_path[len] = 0;
+ g_program_filespec.SetFile(exe_path, FileSpec::Style::native);
+ }
+ }
+
+ return g_program_filespec;
+}
+
+bool HostInfoAIX::ComputeSupportExeDirectory(FileSpec &file_spec) {
+ if (HostInfoPosix::ComputeSupportExeDirectory(file_spec) &&
+ file_spec.IsAbsolute() && FileSystem::Instance().Exists(file_spec))
+ return true;
+ file_spec.SetDirectory(GetProgramFileSpec().GetDirectory());
+ return !file_spec.GetDirectory().IsEmpty();
+}
+
+bool HostInfoAIX::ComputeSystemPluginsDirectory(FileSpec &file_spec) {
+ FileSpec temp_file("/usr/" LLDB_INSTALL_LIBDIR_BASENAME "/lldb/plugins");
+ FileSystem::Instance().Resolve(temp_file);
+ file_spec.SetDirectory(temp_file.GetPath());
+ return true;
+}
+
+bool HostInfoAIX::ComputeUserPluginsDirectory(FileSpec &file_spec) {
+ // XDG Base Directory Specification
+ // http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html If
+ // XDG_DATA_HOME exists, use that, otherwise use ~/.local/share/lldb.
+ const char *xdg_data_home = getenv("XDG_DATA_HOME");
+ if (xdg_data_home && xdg_data_home[0]) {
+ std::string user_plugin_dir(xdg_data_home);
+ user_plugin_dir += "/lldb";
+ file_spec.SetDirectory(user_plugin_dir.c_str());
+ } else
+ file_spec.SetDirectory("~/.local/share/lldb");
+ return true;
+}
+
+void HostInfoAIX::ComputeHostArchitectureSupport(ArchSpec &arch_32,
+ ArchSpec &arch_64) {
+ HostInfoPosix::ComputeHostArchitectureSupport(arch_32, arch_64);
+
+ // On AIX, "unknown" in the vendor slot isn't what we want for the default
+ // triple. It's probably an artifact of config.guess.
+ if (arch_32.IsValid()) {
+ if (arch_32.GetTriple().getVendor() == llvm::Triple::UnknownVendor)
+ arch_32.GetTriple().setVendorName(llvm::StringRef());
+ }
+ if (arch_64.IsValid()) {
+ if (arch_64.GetTriple().getVendor() == llvm::Triple::UnknownVendor)
+ arch_64.GetTriple().setVendorName(llvm::StringRef());
+ }
+}
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