diff options
Diffstat (limited to 'source/Host/linux/HostInfoLinux.cpp')
| -rw-r--r-- | source/Host/linux/HostInfoLinux.cpp | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/source/Host/linux/HostInfoLinux.cpp b/source/Host/linux/HostInfoLinux.cpp new file mode 100644 index 0000000000000..4732a2a571b66 --- /dev/null +++ b/source/Host/linux/HostInfoLinux.cpp @@ -0,0 +1,282 @@ +//===-- HostInfoLinux.cpp ---------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "lldb/Core/Log.h" +#include "lldb/Host/linux/HostInfoLinux.h" + +#include <limits.h> +#include <stdio.h> +#include <string.h> +#include <sys/utsname.h> + +#include <algorithm> +#include <mutex> // std::once + +using namespace lldb_private; + +namespace +{ +struct HostInfoLinuxFields +{ + HostInfoLinuxFields() + : m_os_major(0) + , m_os_minor(0) + , m_os_update(0) + { + } + + std::string m_distribution_id; + uint32_t m_os_major; + uint32_t m_os_minor; + uint32_t m_os_update; +}; + +HostInfoLinuxFields *g_fields = nullptr; +} + +void +HostInfoLinux::Initialize() +{ + HostInfoPosix::Initialize(); + + g_fields = new HostInfoLinuxFields(); +} + +uint32_t +HostInfoLinux::GetMaxThreadNameLength() +{ + return 16; +} + +bool +HostInfoLinux::GetOSVersion(uint32_t &major, uint32_t &minor, uint32_t &update) +{ + static bool success = false; + static std::once_flag g_once_flag; + std::call_once(g_once_flag, []() { + + struct utsname un; + if (uname(&un) == 0) + { + int status = sscanf(un.release, "%u.%u.%u", &g_fields->m_os_major, &g_fields->m_os_minor, &g_fields->m_os_update); + if (status == 3) + success = true; + else + { + // Some kernels omit the update version, so try looking for just "X.Y" and + // set update to 0. + g_fields->m_os_update = 0; + status = sscanf(un.release, "%u.%u", &g_fields->m_os_major, &g_fields->m_os_minor); + if (status == 2) + success = true; + } + } + }); + + + major = g_fields->m_os_major; + minor = g_fields->m_os_minor; + update = g_fields->m_os_update; + return success; +} + +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 std::once_flag g_once_flag; + std::call_once(g_once_flag, []() { + + Log *log(lldb_private::GetLogIfAllCategoriesSet(LIBLLDB_LOG_HOST)); + if (log) + log->Printf("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 + if (log) + log->Printf("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) + { + if (log) + log->Printf("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) != NULL) + { + if (log) + log->Printf("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; + if (log) + log->Printf("distribution id set to \"%s\"", g_fields->m_distribution_id.c_str()); + } + else + { + if (log) + log->Printf("failed to find \"%s\" field in \"%s\"", distributor_id_key, distribution_id); + } + } + else + { + if (log) + log->Printf("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.c_str(); +} + +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, false); + } + } + + return g_program_filespec; +} + +bool +HostInfoLinux::ComputeSupportExeDirectory(FileSpec &file_spec) +{ + if (HostInfoPosix::ComputeSupportExeDirectory(file_spec) && + file_spec.IsAbsolute() && + file_spec.Exists()) + return true; + file_spec.GetDirectory() = GetProgramFileSpec().GetDirectory(); + return !file_spec.GetDirectory().IsEmpty(); +} + +bool +HostInfoLinux::ComputeSystemPluginsDirectory(FileSpec &file_spec) +{ + FileSpec temp_file("/usr/lib/lldb", true); + 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()); + } +} |