vendor/lldb/lldb-trunk-r300422

1 files changed, 225 insertions, 0 deletions

diff --git a/source/Host/openbsd/Host.cpp b/source/Host/openbsd/Host.cpp
new file mode 100644
index 000000000000..c9ff69366c2f
--- /dev/null
+++ b/source/Host/openbsd/Host.cpp
@@ -0,0 +1,225 @@
+//===-- source/Host/openbsd/Host.cpp ----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// C Includes
+#include <sys/types.h>
+
+#include <sys/signal.h>
+#include <sys/exec.h>
+#include <sys/proc.h>
+#include <sys/ptrace.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+
+#include <stdio.h>
+
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/Core/Module.h"
+#include "lldb/Core/StreamFile.h"
+#include "lldb/Host/Host.h"
+#include "lldb/Host/HostInfo.h"
+#include "lldb/Target/Platform.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/Endian.h"
+#include "lldb/Utility/Error.h"
+#include "lldb/Utility/Log.h"
+#include "lldb/Utility/StreamString.h"
+
+#include "lldb/Utility/CleanUp.h"
+#include "lldb/Utility/DataBufferHeap.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/NameMatches.h"
+
+#include "llvm/Support/Host.h"
+
+extern "C" {
+extern char **environ;
+}
+
+using namespace lldb;
+using namespace lldb_private;
+
+size_t Host::GetEnvironment(StringList &env) {
+  char *v;
+  char **var = environ;
+  for (; var != NULL && *var != NULL; ++var) {
+    v = strchr(*var, (int)'-');
+    if (v == NULL)
+      continue;
+    env.AppendString(v);
+  }
+  return env.GetSize();
+}
+
+static bool
+GetOpenBSDProcessArgs(const ProcessInstanceInfoMatch *match_info_ptr,
+                      ProcessInstanceInfo &process_info) {
+  if (process_info.ProcessIDIsValid()) {
+    int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ARGS,
+                  (int)process_info.GetProcessID()};
+
+    char arg_data[8192];
+    size_t arg_data_size = sizeof(arg_data);
+    if (::sysctl(mib, 4, arg_data, &arg_data_size, NULL, 0) == 0) {
+      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) {
+        process_info.GetExecutableFile().SetFile(cstr, false);
+
+        if (!(match_info_ptr == NULL ||
+              NameMatches(
+                  process_info.GetExecutableFile().GetFilename().GetCString(),
+                  match_info_ptr->GetNameMatchType(),
+                  match_info_ptr->GetProcessInfo().GetName())))
+          return false;
+
+        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)
+            return true;
+
+          cstr = data.GetCStr(&offset);
+          if (cstr)
+            proc_args.AppendArgument(llvm::StringRef(cstr));
+          else
+            return true;
+        }
+      }
+    }
+  }
+  return false;
+}
+
+static bool GetOpenBSDProcessCPUType(ProcessInstanceInfo &process_info) {
+  if (process_info.ProcessIDIsValid()) {
+    process_info.GetArchitecture() =
+        HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
+    return true;
+  }
+  process_info.GetArchitecture().Clear();
+  return false;
+}
+
+static bool GetOpenBSDProcessUserAndGroup(ProcessInstanceInfo &process_info) {
+  struct kinfo_proc proc_kinfo;
+  size_t proc_kinfo_size;
+
+  if (process_info.ProcessIDIsValid()) {
+    int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PID,
+                  (int)process_info.GetProcessID()};
+    proc_kinfo_size = sizeof(struct kinfo_proc);
+
+    if (::sysctl(mib, 4, &proc_kinfo, &proc_kinfo_size, NULL, 0) == 0) {
+      if (proc_kinfo_size > 0) {
+        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);
+        return true;
+      }
+    }
+  }
+  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) {
+  std::vector<struct kinfo_proc> kinfos;
+
+  int mib[3] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL};
+
+  size_t pid_data_size = 0;
+  if (::sysctl(mib, 3, NULL, &pid_data_size, NULL, 0) != 0)
+    return 0;
+
+  // Add a few extra in case a few more show up
+  const size_t estimated_pid_count =
+      (pid_data_size / sizeof(struct kinfo_proc)) + 10;
+
+  kinfos.resize(estimated_pid_count);
+  pid_data_size = kinfos.size() * sizeof(struct kinfo_proc);
+
+  if (::sysctl(mib, 3, &kinfos[0], &pid_data_size, NULL, 0) != 0)
+    return 0;
+
+  const size_t actual_pid_count = (pid_data_size / sizeof(struct kinfo_proc));
+
+  bool all_users = match_info.GetMatchAllUsers();
+  const ::pid_t our_pid = getpid();
+  const uid_t our_uid = getuid();
+  for (size_t i = 0; i < actual_pid_count; i++) {
+    const struct kinfo_proc &kinfo = kinfos[i];
+    const bool kinfo_user_matches = (all_users || (kinfo.p_ruid == our_uid) ||
+                                     // Special case, if lldb is being run as
+                                     // root we can attach to anything.
+                                     (our_uid == 0));
+
+    if (kinfo_user_matches == false || // Make sure the user is acceptable
+        kinfo.p_pid == our_pid ||     // Skip this process
+        kinfo.p_pid == 0 ||           // Skip kernel (kernel pid is zero)
+        kinfo.p_stat == SZOMB ||      // Zombies are bad, they like brains...
+        kinfo.p_psflags & PS_TRACED || // Being debugged?
+        kinfo.p_flag & P_WEXIT)       // Working on exiting
+      continue;
+
+    ProcessInstanceInfo process_info;
+    process_info.SetProcessID(kinfo.p_pid);
+    process_info.SetParentProcessID(kinfo.p_ppid);
+    process_info.SetUserID(kinfo.p_ruid);
+    process_info.SetGroupID(kinfo.p_rgid);
+    process_info.SetEffectiveUserID(kinfo.p_svuid);
+    process_info.SetEffectiveGroupID(kinfo.p_svgid);
+
+    // Make sure our info matches before we go fetch the name and cpu type
+    if (match_info.Matches(process_info) &&
+        GetOpenBSDProcessArgs(&match_info, process_info)) {
+      GetOpenBSDProcessCPUType(process_info);
+      if (match_info.Matches(process_info))
+        process_infos.Append(process_info);
+    }
+  }
+
+  return process_infos.GetSize();
+}
+
+bool Host::GetProcessInfo(lldb::pid_t pid, ProcessInstanceInfo &process_info) {
+  process_info.SetProcessID(pid);
+
+  if (GetOpenBSDProcessArgs(NULL, process_info)) {
+    // should use libprocstat instead of going right into sysctl?
+    GetOpenBSDProcessCPUType(process_info);
+    GetOpenBSDProcessUserAndGroup(process_info);
+    return true;
+  }
+
+  process_info.Clear();
+  return false;
+}
+
+Error Host::ShellExpandArguments(ProcessLaunchInfo &launch_info) {
+  return Error("unimplemented");
+}