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HemangGadhaviHemangGadhavi
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[lldb][AIX] get host info for AIX (llvm#134354)
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. llvm#101657 The complete changes for porting are present in this draft PR: llvm#102601 - Added changes to make the common host support functions under `Host/posix` for unix-like system. Also, created the `unittests/Host/posix/` to test the hostInfo & support functions for unix-like system. - Added changes to get the host information for AIX. (GetProcessInfo()) (Information like : executable path, arch, process status etc.)
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16 files changed

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‎lldb/include/lldb/Host/linux/Support.h‎

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@@ -18,12 +18,6 @@ namespace lldb_private {
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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getProcFile(::pid_t pid, ::pid_t tid, const llvm::Twine &file);
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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getProcFile(::pid_t pid, const llvm::Twine &file);
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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getProcFile(const llvm::Twine &file);
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} // namespace lldb_private
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#endif // #ifndef LLDB_HOST_LINUX_SUPPORT_H

‎lldb/include/lldb/Host/posix/Support.h‎

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//===-- Support.h -----------------------------------------------*- C++ -*-===//
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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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#ifndef LLDB_HOST_POSIX_SUPPORT_H
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#define LLDB_HOST_POSIX_SUPPORT_H
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/ErrorOr.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <memory>
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namespace lldb_private {
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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getProcFile(::pid_t pid, const llvm::Twine &file);
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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getProcFile(const llvm::Twine &file);
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} // namespace lldb_private
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#endif // #ifndef LLDB_HOST_POSIX_SUPPORT_H

‎lldb/source/Host/CMakeLists.txt‎

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@@ -87,6 +87,7 @@ else()
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posix/MainLoopPosix.cpp
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posix/PipePosix.cpp
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posix/ProcessLauncherPosixFork.cpp
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posix/Support.cpp
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)
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if (CMAKE_SYSTEM_NAME MATCHES "Darwin")

‎lldb/source/Host/aix/Host.cpp‎

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@@ -7,17 +7,138 @@
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/Host.h"
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#include "lldb/Host/posix/Support.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/ProcessInfo.h"
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#include "lldb/Utility/Status.h"
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#include "llvm/BinaryFormat/XCOFF.h"
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#include <sys/proc.h>
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#include <sys/procfs.h>
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using namespace lldb;
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using namespace lldb_private;
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namespace {
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enum class ProcessState {
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Unknown,
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Dead,
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DiskSleep,
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Idle,
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Paging,
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Parked,
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Running,
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Sleeping,
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TracedOrStopped,
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Zombie,
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};
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}
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static ProcessInstanceInfo::timespec convert(pr_timestruc64_t t) {
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ProcessInstanceInfo::timespec ts;
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ts.tv_sec = t.tv_sec;
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ts.tv_usec = t.tv_nsec / 1000; // nanos to micros
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return ts;
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}
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static bool GetStatusInfo(::pid_t pid, ProcessInstanceInfo &processInfo,
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ProcessState &State) {
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struct pstatus pstatusData;
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auto BufferOrError = getProcFile(pid, "status");
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if (!BufferOrError)
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return false;
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std::unique_ptr<llvm::MemoryBuffer> StatusBuffer = std::move(*BufferOrError);
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// Ensure there's enough data for psinfoData
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if (StatusBuffer->getBufferSize() < sizeof(pstatusData))
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return false;
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std::memcpy(&pstatusData, StatusBuffer->getBufferStart(),
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sizeof(pstatusData));
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switch (pstatusData.pr_stat) {
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case SIDL:
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State = ProcessState::Idle;
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break;
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case SACTIVE:
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State = ProcessState::Running;
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break;
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case SSTOP:
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State = ProcessState::TracedOrStopped;
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break;
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case SZOMB:
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State = ProcessState::Zombie;
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break;
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default:
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State = ProcessState::Unknown;
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break;
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}
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processInfo.SetIsZombie(State == ProcessState::Zombie);
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processInfo.SetUserTime(convert(pstatusData.pr_utime));
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processInfo.SetSystemTime(convert(pstatusData.pr_stime));
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processInfo.SetCumulativeUserTime(convert(pstatusData.pr_cutime));
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processInfo.SetCumulativeSystemTime(convert(pstatusData.pr_cstime));
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return true;
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}
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static bool GetExePathAndIds(::pid_t pid, ProcessInstanceInfo &process_info) {
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struct psinfo psinfoData;
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auto BufferOrError = getProcFile(pid, "psinfo");
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if (!BufferOrError)
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return false;
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std::unique_ptr<llvm::MemoryBuffer> PsinfoBuffer = std::move(*BufferOrError);
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// Ensure there's enough data for psinfoData
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if (PsinfoBuffer->getBufferSize() < sizeof(psinfoData))
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return false;
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std::memcpy(&psinfoData, PsinfoBuffer->getBufferStart(), sizeof(psinfoData));
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llvm::StringRef PathRef(
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psinfoData.pr_psargs,
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strnlen(psinfoData.pr_psargs, sizeof(psinfoData.pr_psargs)));
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if (PathRef.empty())
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return false;
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process_info.GetExecutableFile().SetFile(PathRef, FileSpec::Style::native);
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ArchSpec arch_spec = ArchSpec();
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arch_spec.SetArchitecture(eArchTypeXCOFF, llvm::XCOFF::TCPU_PPC64,
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LLDB_INVALID_CPUTYPE, llvm::Triple::AIX);
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process_info.SetArchitecture(arch_spec);
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process_info.SetParentProcessID(psinfoData.pr_ppid);
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process_info.SetGroupID(psinfoData.pr_gid);
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process_info.SetEffectiveGroupID(psinfoData.pr_egid);
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process_info.SetUserID(psinfoData.pr_uid);
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process_info.SetEffectiveUserID(psinfoData.pr_euid);
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process_info.SetProcessGroupID(psinfoData.pr_pgid);
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process_info.SetProcessSessionID(psinfoData.pr_sid);
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return true;
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}
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static bool GetProcessAndStatInfo(::pid_t pid,
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ProcessInstanceInfo &process_info,
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ProcessState &State) {
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process_info.Clear();
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process_info.SetProcessID(pid);
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if (pid == LLDB_INVALID_PROCESS_ID)
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return false;
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// Get Executable path/Arch and Get User and Group IDs.
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if (!GetExePathAndIds(pid, process_info))
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return false;
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// Get process status and timing info.
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if (!GetStatusInfo(pid, process_info, State))
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return false;
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return true;
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}
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uint32_t Host::FindProcessesImpl(const ProcessInstanceInfoMatch &match_info,
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ProcessInstanceInfoList &process_infos) {
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return 0;
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}
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bool Host::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) {
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return false;
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ProcessState State;
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return GetProcessAndStatInfo(pid, process_info, State);
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}
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Status Host::ShellExpandArguments(ProcessLaunchInfo &launch_info) {

‎lldb/source/Host/linux/Host.cpp‎

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#include "lldb/Host/Host.h"
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#include "lldb/Host/HostInfo.h"
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#include "lldb/Host/linux/Host.h"
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#include "lldb/Host/linux/Support.h"
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#include "lldb/Host/posix/Support.h"
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#include "lldb/Utility/DataExtractor.h"
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using namespace lldb;

‎lldb/source/Host/linux/Support.cpp‎

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@@ -22,23 +22,3 @@ lldb_private::getProcFile(::pid_t pid, ::pid_t tid, const llvm::Twine &file) {
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LLDB_LOG(log, "Failed to open {0}: {1}", File, Ret.getError().message());
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return Ret;
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}
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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lldb_private::getProcFile(::pid_t pid, const llvm::Twine &file) {
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Log *log = GetLog(LLDBLog::Host);
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std::string File = ("/proc/" + llvm::Twine(pid) + "/" + file).str();
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auto Ret = llvm::MemoryBuffer::getFileAsStream(File);
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if (!Ret)
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LLDB_LOG(log, "Failed to open {0}: {1}", File, Ret.getError().message());
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return Ret;
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}
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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lldb_private::getProcFile(const llvm::Twine &file) {
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Log *log = GetLog(LLDBLog::Host);
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std::string File = ("/proc/" + file).str();
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auto Ret = llvm::MemoryBuffer::getFileAsStream(File);
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if (!Ret)
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LLDB_LOG(log, "Failed to open {0}: {1}", File, Ret.getError().message());
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return Ret;
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}

‎lldb/source/Host/posix/Support.cpp‎

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//===-- Support.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 "lldb/Host/posix/Support.h"
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#include "lldb/Utility/LLDBLog.h"
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#include "lldb/Utility/Log.h"
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#include "llvm/Support/MemoryBuffer.h"
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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lldb_private::getProcFile(::pid_t pid, const llvm::Twine &file) {
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Log *log = GetLog(LLDBLog::Host);
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std::string File = ("/proc/" + llvm::Twine(pid) + "/" + file).str();
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auto Ret = llvm::MemoryBuffer::getFileAsStream(File);
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if (!Ret)
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LLDB_LOG(log, "Failed to open {0}: {1}", File, Ret.getError().message());
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return Ret;
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}
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llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
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lldb_private::getProcFile(const llvm::Twine &file) {
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Log *log = GetLog(LLDBLog::Host);
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std::string File = ("/proc/" + file).str();
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auto Ret = llvm::MemoryBuffer::getFileAsStream(File);
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if (!Ret)
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LLDB_LOG(log, "Failed to open {0}: {1}", File, Ret.getError().message());
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return Ret;
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}

‎lldb/source/Plugins/Process/AIX/NativeProcessAIX.h‎

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#include "Plugins/Process/Utility/NativeProcessSoftwareSingleStep.h"
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#include "lldb/Host/Debug.h"
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#include "lldb/Host/common/NativeProcessProtocol.h"
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#include "lldb/Host/linux/Support.h"
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#include "lldb/Host/posix/Support.h"
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#include "lldb/Target/MemoryRegionInfo.h"
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#include "lldb/Utility/ArchSpec.h"
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#include "lldb/Utility/FileSpec.h"

‎lldb/source/Plugins/Process/Linux/IntelPTCollector.cpp‎

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#include "Perf.h"
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#include "Plugins/Process/POSIX/ProcessPOSIXLog.h"
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#include "Procfs.h"
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#include "lldb/Host/linux/Support.h"
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#include "lldb/Utility/StreamString.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Support/Error.h"

‎lldb/source/Plugins/Process/Linux/NativeProcessLinux.h‎

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#include "lldb/Host/Debug.h"
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#include "lldb/Host/HostThread.h"
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#include "lldb/Host/linux/Support.h"
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#include "lldb/Host/posix/Support.h"
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#include "lldb/Target/MemoryRegionInfo.h"
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#include "lldb/Utility/ArchSpec.h"
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#include "lldb/Utility/FileSpec.h"

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