Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 246 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Host/netbsd/Host.cpp b/gnu/llvm/lldb/source/Host/netbsd/Host.cpp
new file mode 100644
index 00000000000..20f3db3c22c
--- /dev/null
+++ b/gnu/llvm/lldb/source/Host/netbsd/Host.cpp
@@ -0,0 +1,246 @@
+//===-- source/Host/netbsd/Host.cpp -----------------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+
+#include <dlfcn.h>
+#include <execinfo.h>
+#include <stdio.h>
+#include <sys/proc.h>
+#include <sys/sysctl.h>
+#include <sys/types.h>
+
+#include <limits.h>
+
+#include <elf.h>
+#include <kvm.h>
+#include <sys/exec.h>
+#include <sys/ptrace.h>
+
+#include "lldb/Host/Host.h"
+#include "lldb/Host/HostInfo.h"
+#include "lldb/Utility/DataBufferHeap.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/Endian.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/NameMatches.h"
+#include "lldb/Utility/ProcessInfo.h"
+#include "lldb/Utility/Status.h"
+#include "lldb/Utility/StreamString.h"
+
+#include "llvm/Support/Host.h"
+
+extern "C" {
+extern char **environ;
+}
+
+using namespace lldb;
+using namespace lldb_private;
+
+namespace lldb_private {
+class ProcessLaunchInfo;
+}
+
+Environment Host::GetEnvironment() { return Environment(environ); }
+
+static bool GetNetBSDProcessArgs(const ProcessInstanceInfoMatch *match_info_ptr,
+                                 ProcessInstanceInfo &process_info) {
+  if (!process_info.ProcessIDIsValid())
+    return false;
+
+  int pid = process_info.GetProcessID();
+
+  int mib[4] = {CTL_KERN, KERN_PROC_ARGS, pid, KERN_PROC_ARGV};
+
+  char arg_data[8192];
+  size_t arg_data_size = sizeof(arg_data);
+  if (::sysctl(mib, 4, arg_data, &arg_data_size, NULL, 0) != 0)
+    return false;
+
+  DataExtractor data(arg_data, arg_data_size, endian::InlHostByteOrder(),
+                     sizeof(void *));
+  lldb::offset_t offset = 0;
+  const char *cstr;
+
+  cstr = data.GetCStr(&offset);
+  if (!cstr)
+    return false;
+
+  process_info.GetExecutableFile().SetFile(cstr,
+                                           FileSpec::Style::native);
+
+  if (!(match_info_ptr == NULL ||
+        NameMatches(process_info.GetExecutableFile().GetFilename().GetCString(),
+                    match_info_ptr->GetNameMatchType(),
+                    match_info_ptr->GetProcessInfo().GetName())))
+    return false;
+
+  process_info.SetArg0(cstr);
+  Args &proc_args = process_info.GetArguments();
+  while (1) {
+    const uint8_t *p = data.PeekData(offset, 1);
+    while ((p != NULL) && (*p == '\0') && offset < arg_data_size) {
+      ++offset;
+      p = data.PeekData(offset, 1);
+    }
+    if (p == NULL || offset >= arg_data_size)
+      break;
+
+    cstr = data.GetCStr(&offset);
+    if (!cstr)
+      break;
+
+    proc_args.AppendArgument(llvm::StringRef(cstr));
+  }
+
+  return true;
+}
+
+static bool GetNetBSDProcessCPUType(ProcessInstanceInfo &process_info) {
+  if (process_info.ProcessIDIsValid()) {
+    process_info.GetArchitecture() =
+        HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
+    return true;
+  }
+  process_info.GetArchitecture().Clear();
+  return false;
+}
+
+static bool GetNetBSDProcessUserAndGroup(ProcessInstanceInfo &process_info) {
+  ::kvm_t *kdp;
+  char errbuf[_POSIX2_LINE_MAX]; /* XXX: error string unused */
+
+  struct ::kinfo_proc2 *proc_kinfo;
+  const int pid = process_info.GetProcessID();
+  int nproc;
+
+  if (!process_info.ProcessIDIsValid())
+    goto error;
+
+  if ((kdp = ::kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf)) == NULL)
+    goto error;
+
+  if ((proc_kinfo = ::kvm_getproc2(kdp, KERN_PROC_PID, pid,
+                                   sizeof(struct ::kinfo_proc2), &nproc)) ==
+      NULL) {
+    ::kvm_close(kdp);
+    goto error;
+  }
+
+  if (nproc < 1) {
+    ::kvm_close(kdp); /* XXX: we don't check for error here */
+    goto error;
+  }
+
+  process_info.SetParentProcessID(proc_kinfo->p_ppid);
+  process_info.SetUserID(proc_kinfo->p_ruid);
+  process_info.SetGroupID(proc_kinfo->p_rgid);
+  process_info.SetEffectiveUserID(proc_kinfo->p_uid);
+  process_info.SetEffectiveGroupID(proc_kinfo->p_gid);
+
+  ::kvm_close(kdp); /* XXX: we don't check for error here */
+
+  return true;
+
+error:
+  process_info.SetParentProcessID(LLDB_INVALID_PROCESS_ID);
+  process_info.SetUserID(UINT32_MAX);
+  process_info.SetGroupID(UINT32_MAX);
+  process_info.SetEffectiveUserID(UINT32_MAX);
+  process_info.SetEffectiveGroupID(UINT32_MAX);
+  return false;
+}
+
+uint32_t Host::FindProcesses(const ProcessInstanceInfoMatch &match_info,
+                             ProcessInstanceInfoList &process_infos) {
+  const ::pid_t our_pid = ::getpid();
+  const ::uid_t our_uid = ::getuid();
+
+  const bool all_users =
+      match_info.GetMatchAllUsers() ||
+      // Special case, if lldb is being run as root we can attach to anything
+      (our_uid == 0);
+
+  kvm_t *kdp;
+  char errbuf[_POSIX2_LINE_MAX]; /* XXX: error string unused */
+  if ((kdp = ::kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf)) == NULL)
+    return 0;
+
+  struct ::kinfo_proc2 *proc_kinfo;
+  int nproc;
+  if ((proc_kinfo = ::kvm_getproc2(kdp, KERN_PROC_ALL, 0,
+                                   sizeof(struct ::kinfo_proc2), &nproc)) ==
+      NULL) {
+    ::kvm_close(kdp);
+    return 0;
+  }
+
+  for (int i = 0; i < nproc; i++) {
+    if (proc_kinfo[i].p_pid < 1)
+      continue; /* not valid */
+    /* Make sure the user is acceptable */
+    if (!all_users && proc_kinfo[i].p_ruid != our_uid)
+      continue;
+
+    if (proc_kinfo[i].p_pid == our_pid ||  // Skip this process
+        proc_kinfo[i].p_pid == 0 ||        // Skip kernel (kernel pid is 0)
+        proc_kinfo[i].p_stat == LSZOMB ||  // Zombies are bad
+        proc_kinfo[i].p_flag & P_TRACED || // Being debugged?
+        proc_kinfo[i].p_flag & P_WEXIT)    // Working on exiting
+      continue;
+
+    // Every thread is a process in NetBSD, but all the threads of a single
+    // process have the same pid. Do not store the process info in the result
+    // list if a process with given identifier is already registered there.
+    if (proc_kinfo[i].p_nlwps > 1) {
+      bool already_registered = false;
+      for (size_t pi = 0; pi < process_infos.GetSize(); pi++) {
+        if (process_infos.GetProcessIDAtIndex(pi) == proc_kinfo[i].p_pid) {
+          already_registered = true;
+          break;
+        }
+      }
+
+      if (already_registered)
+        continue;
+    }
+    ProcessInstanceInfo process_info;
+    process_info.SetProcessID(proc_kinfo[i].p_pid);
+    process_info.SetParentProcessID(proc_kinfo[i].p_ppid);
+    process_info.SetUserID(proc_kinfo[i].p_ruid);
+    process_info.SetGroupID(proc_kinfo[i].p_rgid);
+    process_info.SetEffectiveUserID(proc_kinfo[i].p_uid);
+    process_info.SetEffectiveGroupID(proc_kinfo[i].p_gid);
+    // Make sure our info matches before we go fetch the name and cpu type
+    if (match_info.Matches(process_info) &&
+        GetNetBSDProcessArgs(&match_info, process_info)) {
+      GetNetBSDProcessCPUType(process_info);
+      if (match_info.Matches(process_info))
+        process_infos.Append(process_info);
+    }
+  }
+
+  kvm_close(kdp); /* XXX: we don't check for error here */
+
+  return process_infos.GetSize();
+}
+
+bool Host::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) {
+  process_info.SetProcessID(pid);
+
+  if (GetNetBSDProcessArgs(NULL, process_info)) {
+    GetNetBSDProcessCPUType(process_info);
+    GetNetBSDProcessUserAndGroup(process_info);
+    return true;
+  }
+
+  process_info.Clear();
+  return false;
+}
+
+Status Host::ShellExpandArguments(ProcessLaunchInfo &launch_info) {
+  return Status("unimplemented");
+}