Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 223 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Host/linux/HostInfoLinux.cpp b/gnu/llvm/lldb/source/Host/linux/HostInfoLinux.cpp
new file mode 100644
index 00000000000..a008a74ec95
--- /dev/null
+++ b/gnu/llvm/lldb/source/Host/linux/HostInfoLinux.cpp
@@ -0,0 +1,223 @@
+//===-- HostInfoLinux.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 "lldb/Host/linux/HostInfoLinux.h"
+#include "lldb/Host/Config.h"
+#include "lldb/Host/FileSystem.h"
+#include "lldb/Utility/Log.h"
+
+#include "llvm/Support/Threading.h"
+
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/utsname.h>
+#include <unistd.h>
+
+#include <algorithm>
+#include <mutex>
+
+using namespace lldb_private;
+
+namespace {
+struct HostInfoLinuxFields {
+  std::string m_distribution_id;
+  llvm::VersionTuple m_os_version;
+};
+
+HostInfoLinuxFields *g_fields = nullptr;
+}
+
+void HostInfoLinux::Initialize() {
+  HostInfoPosix::Initialize();
+
+  g_fields = new HostInfoLinuxFields();
+}
+
+llvm::VersionTuple HostInfoLinux::GetOSVersion() {
+  static llvm::once_flag g_once_flag;
+  llvm::call_once(g_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;
+}
+
+bool HostInfoLinux::GetOSBuildString(std::string &s) {
+  struct utsname un;
+  ::memset(&un, 0, sizeof(utsname));
+  s.clear();
+
+  if (uname(&un) < 0)
+    return false;
+
+  s.assign(un.release);
+  return true;
+}
+
+bool HostInfoLinux::GetOSKernelDescription(std::string &s) {
+  struct utsname un;
+
+  ::memset(&un, 0, sizeof(utsname));
+  s.clear();
+
+  if (uname(&un) < 0)
+    return false;
+
+  s.assign(un.version);
+  return true;
+}
+
+llvm::StringRef HostInfoLinux::GetDistributionId() {
+  // Try to run 'lbs_release -i', and use that response for the distribution
+  // id.
+  static llvm::once_flag g_once_flag;
+  llvm::call_once(g_once_flag, []() {
+
+    Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST));
+    LLDB_LOGF(log, "attempting to determine Linux 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));
+          id_string.erase(std::remove(id_string.begin(), id_string.end(), '\n'),
+                          id_string.end());
+
+          // 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 HostInfoLinux::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 HostInfoLinux::ComputeSupportExeDirectory(FileSpec &file_spec) {
+  if (HostInfoPosix::ComputeSupportExeDirectory(file_spec) &&
+      file_spec.IsAbsolute() && FileSystem::Instance().Exists(file_spec))
+    return true;
+  file_spec.GetDirectory() = GetProgramFileSpec().GetDirectory();
+  return !file_spec.GetDirectory().IsEmpty();
+}
+
+bool HostInfoLinux::ComputeSystemPluginsDirectory(FileSpec &file_spec) {
+  FileSpec temp_file("/usr/lib" LLDB_LIBDIR_SUFFIX "/lldb/plugins");
+  FileSystem::Instance().Resolve(temp_file);
+  file_spec.GetDirectory().SetCString(temp_file.GetPath().c_str());
+  return true;
+}
+
+bool HostInfoLinux::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.GetDirectory().SetCString(user_plugin_dir.c_str());
+  } else
+    file_spec.GetDirectory().SetCString("~/.local/share/lldb");
+  return true;
+}
+
+void HostInfoLinux::ComputeHostArchitectureSupport(ArchSpec &arch_32,
+                                                   ArchSpec &arch_64) {
+  HostInfoPosix::ComputeHostArchitectureSupport(arch_32, arch_64);
+
+  const char *distribution_id = GetDistributionId().data();
+
+  // On Linux, "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()) {
+    arch_32.SetDistributionId(distribution_id);
+    if (arch_32.GetTriple().getVendor() == llvm::Triple::UnknownVendor)
+      arch_32.GetTriple().setVendorName(llvm::StringRef());
+  }
+  if (arch_64.IsValid()) {
+    arch_64.SetDistributionId(distribution_id);
+    if (arch_64.GetTriple().getVendor() == llvm::Triple::UnknownVendor)
+      arch_64.GetTriple().setVendorName(llvm::StringRef());
+  }
+}