forked from OSchip/llvm-project
718 lines
23 KiB
C++
718 lines
23 KiB
C++
//===-- PlatformLinux.cpp ---------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "PlatformLinux.h"
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#include "lldb/Host/Config.h"
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// C Includes
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#include <stdio.h>
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#ifndef LLDB_DISABLE_POSIX
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#include <sys/utsname.h>
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#endif
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// C++ Includes
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// Other libraries and framework includes
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// Project includes
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#include "lldb/Breakpoint/BreakpointLocation.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Error.h"
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#include "lldb/Core/Log.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/ModuleList.h"
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#include "lldb/Core/ModuleSpec.h"
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#include "lldb/Core/PluginManager.h"
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#include "lldb/Core/State.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Host/FileSpec.h"
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#include "lldb/Host/HostInfo.h"
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#include "lldb/Interpreter/OptionValueProperties.h"
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#include "lldb/Interpreter/Property.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/Target.h"
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// Define these constants from Linux mman.h for use when targeting
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// remote linux systems even when host has different values.
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#define MAP_PRIVATE 2
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#define MAP_ANON 0x20
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using namespace lldb;
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using namespace lldb_private;
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using namespace lldb_private::platform_linux;
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static uint32_t g_initialize_count = 0;
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//------------------------------------------------------------------
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/// Code to handle the PlatformLinux settings
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//------------------------------------------------------------------
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namespace {
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class PlatformLinuxProperties : public Properties {
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public:
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PlatformLinuxProperties();
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~PlatformLinuxProperties() override = default;
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static ConstString &GetSettingName();
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private:
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static const PropertyDefinition *GetStaticPropertyDefinitions();
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};
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typedef std::shared_ptr<PlatformLinuxProperties> PlatformLinuxPropertiesSP;
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} // anonymous namespace
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PlatformLinuxProperties::PlatformLinuxProperties() : Properties() {
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m_collection_sp.reset(new OptionValueProperties(GetSettingName()));
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m_collection_sp->Initialize(GetStaticPropertyDefinitions());
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}
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ConstString &PlatformLinuxProperties::GetSettingName() {
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static ConstString g_setting_name("linux");
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return g_setting_name;
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}
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const PropertyDefinition *
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PlatformLinuxProperties::GetStaticPropertyDefinitions() {
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static PropertyDefinition g_properties[] = {
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{NULL, OptionValue::eTypeInvalid, false, 0, NULL, NULL, NULL}};
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return g_properties;
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}
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static const PlatformLinuxPropertiesSP &GetGlobalProperties() {
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static PlatformLinuxPropertiesSP g_settings_sp;
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if (!g_settings_sp)
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g_settings_sp.reset(new PlatformLinuxProperties());
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return g_settings_sp;
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}
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void PlatformLinux::DebuggerInitialize(Debugger &debugger) {
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if (!PluginManager::GetSettingForPlatformPlugin(
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debugger, PlatformLinuxProperties::GetSettingName())) {
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const bool is_global_setting = true;
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PluginManager::CreateSettingForPlatformPlugin(
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debugger, GetGlobalProperties()->GetValueProperties(),
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ConstString("Properties for the PlatformLinux plug-in."),
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is_global_setting);
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}
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}
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//------------------------------------------------------------------
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PlatformSP PlatformLinux::CreateInstance(bool force, const ArchSpec *arch) {
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Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
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if (log) {
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const char *arch_name;
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if (arch && arch->GetArchitectureName())
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arch_name = arch->GetArchitectureName();
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else
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arch_name = "<null>";
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const char *triple_cstr =
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arch ? arch->GetTriple().getTriple().c_str() : "<null>";
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log->Printf("PlatformLinux::%s(force=%s, arch={%s,%s})", __FUNCTION__,
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force ? "true" : "false", arch_name, triple_cstr);
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}
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bool create = force;
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if (create == false && arch && arch->IsValid()) {
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const llvm::Triple &triple = arch->GetTriple();
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switch (triple.getOS()) {
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case llvm::Triple::Linux:
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create = true;
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break;
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#if defined(__linux__)
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// Only accept "unknown" for the OS if the host is linux and
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// it "unknown" wasn't specified (it was just returned because it
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// was NOT specified)
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case llvm::Triple::OSType::UnknownOS:
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create = !arch->TripleOSWasSpecified();
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break;
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#endif
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default:
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break;
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}
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}
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if (create) {
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if (log)
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log->Printf("PlatformLinux::%s() creating remote-linux platform",
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__FUNCTION__);
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return PlatformSP(new PlatformLinux(false));
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}
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if (log)
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log->Printf(
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"PlatformLinux::%s() aborting creation of remote-linux platform",
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__FUNCTION__);
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return PlatformSP();
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}
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ConstString PlatformLinux::GetPluginNameStatic(bool is_host) {
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if (is_host) {
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static ConstString g_host_name(Platform::GetHostPlatformName());
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return g_host_name;
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} else {
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static ConstString g_remote_name("remote-linux");
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return g_remote_name;
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}
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}
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const char *PlatformLinux::GetPluginDescriptionStatic(bool is_host) {
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if (is_host)
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return "Local Linux user platform plug-in.";
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else
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return "Remote Linux user platform plug-in.";
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}
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ConstString PlatformLinux::GetPluginName() {
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return GetPluginNameStatic(IsHost());
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}
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void PlatformLinux::Initialize() {
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PlatformPOSIX::Initialize();
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if (g_initialize_count++ == 0) {
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#if defined(__linux__) && !defined(__ANDROID__)
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PlatformSP default_platform_sp(new PlatformLinux(true));
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default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
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Platform::SetHostPlatform(default_platform_sp);
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#endif
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PluginManager::RegisterPlugin(
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PlatformLinux::GetPluginNameStatic(false),
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PlatformLinux::GetPluginDescriptionStatic(false),
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PlatformLinux::CreateInstance, PlatformLinux::DebuggerInitialize);
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}
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}
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void PlatformLinux::Terminate() {
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if (g_initialize_count > 0) {
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if (--g_initialize_count == 0) {
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PluginManager::UnregisterPlugin(PlatformLinux::CreateInstance);
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}
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}
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PlatformPOSIX::Terminate();
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}
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Error PlatformLinux::ResolveExecutable(
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const ModuleSpec &ms, lldb::ModuleSP &exe_module_sp,
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const FileSpecList *module_search_paths_ptr) {
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Error error;
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// Nothing special to do here, just use the actual file and architecture
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char exe_path[PATH_MAX];
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ModuleSpec resolved_module_spec(ms);
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if (IsHost()) {
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// If we have "ls" as the exe_file, resolve the executable location based on
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// the current path variables
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if (!resolved_module_spec.GetFileSpec().Exists()) {
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resolved_module_spec.GetFileSpec().GetPath(exe_path, sizeof(exe_path));
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resolved_module_spec.GetFileSpec().SetFile(exe_path, true);
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}
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if (!resolved_module_spec.GetFileSpec().Exists())
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resolved_module_spec.GetFileSpec().ResolveExecutableLocation();
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if (resolved_module_spec.GetFileSpec().Exists())
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error.Clear();
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else {
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error.SetErrorStringWithFormat(
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"unable to find executable for '%s'",
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resolved_module_spec.GetFileSpec().GetPath().c_str());
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}
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} else {
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if (m_remote_platform_sp) {
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error =
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GetCachedExecutable(resolved_module_spec, exe_module_sp,
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module_search_paths_ptr, *m_remote_platform_sp);
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} else {
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// We may connect to a process and use the provided executable (Don't use
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// local $PATH).
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if (resolved_module_spec.GetFileSpec().Exists())
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error.Clear();
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else
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error.SetErrorStringWithFormat("the platform is not currently "
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"connected, and '%s' doesn't exist in "
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"the system root.",
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exe_path);
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}
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}
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if (error.Success()) {
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if (resolved_module_spec.GetArchitecture().IsValid()) {
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error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
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NULL, NULL, NULL);
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if (error.Fail()) {
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// If we failed, it may be because the vendor and os aren't known. If
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// that is the
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// case, try setting them to the host architecture and give it another
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// try.
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llvm::Triple &module_triple =
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resolved_module_spec.GetArchitecture().GetTriple();
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bool is_vendor_specified =
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(module_triple.getVendor() != llvm::Triple::UnknownVendor);
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bool is_os_specified =
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(module_triple.getOS() != llvm::Triple::UnknownOS);
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if (!is_vendor_specified || !is_os_specified) {
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const llvm::Triple &host_triple =
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HostInfo::GetArchitecture(HostInfo::eArchKindDefault).GetTriple();
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if (!is_vendor_specified)
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module_triple.setVendorName(host_triple.getVendorName());
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if (!is_os_specified)
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module_triple.setOSName(host_triple.getOSName());
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error = ModuleList::GetSharedModule(resolved_module_spec,
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exe_module_sp, NULL, NULL, NULL);
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}
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}
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// TODO find out why exe_module_sp might be NULL
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if (!exe_module_sp || exe_module_sp->GetObjectFile() == NULL) {
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exe_module_sp.reset();
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error.SetErrorStringWithFormat(
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"'%s' doesn't contain the architecture %s",
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resolved_module_spec.GetFileSpec().GetPath().c_str(),
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resolved_module_spec.GetArchitecture().GetArchitectureName());
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}
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} else {
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// No valid architecture was specified, ask the platform for
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// the architectures that we should be using (in the correct order)
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// and see if we can find a match that way
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StreamString arch_names;
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for (uint32_t idx = 0; GetSupportedArchitectureAtIndex(
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idx, resolved_module_spec.GetArchitecture());
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++idx) {
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error = ModuleList::GetSharedModule(resolved_module_spec, exe_module_sp,
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NULL, NULL, NULL);
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// Did we find an executable using one of the
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if (error.Success()) {
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if (exe_module_sp && exe_module_sp->GetObjectFile())
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break;
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else
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error.SetErrorToGenericError();
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}
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if (idx > 0)
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arch_names.PutCString(", ");
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arch_names.PutCString(
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resolved_module_spec.GetArchitecture().GetArchitectureName());
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}
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if (error.Fail() || !exe_module_sp) {
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if (resolved_module_spec.GetFileSpec().Readable()) {
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error.SetErrorStringWithFormat(
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"'%s' doesn't contain any '%s' platform architectures: %s",
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resolved_module_spec.GetFileSpec().GetPath().c_str(),
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GetPluginName().GetCString(), arch_names.GetString().c_str());
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} else {
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error.SetErrorStringWithFormat(
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"'%s' is not readable",
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resolved_module_spec.GetFileSpec().GetPath().c_str());
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}
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}
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}
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}
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return error;
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}
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Error PlatformLinux::GetFileWithUUID(const FileSpec &platform_file,
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const UUID *uuid_ptr,
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FileSpec &local_file) {
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if (IsRemote()) {
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if (m_remote_platform_sp)
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return m_remote_platform_sp->GetFileWithUUID(platform_file, uuid_ptr,
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local_file);
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}
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// Default to the local case
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local_file = platform_file;
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return Error();
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}
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//------------------------------------------------------------------
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/// Default Constructor
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//------------------------------------------------------------------
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PlatformLinux::PlatformLinux(bool is_host)
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: PlatformPOSIX(is_host) // This is the local host platform
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{}
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//------------------------------------------------------------------
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/// Destructor.
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///
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/// The destructor is virtual since this class is designed to be
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/// inherited from by the plug-in instance.
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//------------------------------------------------------------------
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PlatformLinux::~PlatformLinux() = default;
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bool PlatformLinux::GetProcessInfo(lldb::pid_t pid,
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ProcessInstanceInfo &process_info) {
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bool success = false;
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if (IsHost()) {
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success = Platform::GetProcessInfo(pid, process_info);
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} else {
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if (m_remote_platform_sp)
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success = m_remote_platform_sp->GetProcessInfo(pid, process_info);
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}
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return success;
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}
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uint32_t
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PlatformLinux::FindProcesses(const ProcessInstanceInfoMatch &match_info,
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ProcessInstanceInfoList &process_infos) {
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uint32_t match_count = 0;
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if (IsHost()) {
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// Let the base class figure out the host details
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match_count = Platform::FindProcesses(match_info, process_infos);
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} else {
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// If we are remote, we can only return results if we are connected
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if (m_remote_platform_sp)
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match_count =
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m_remote_platform_sp->FindProcesses(match_info, process_infos);
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}
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return match_count;
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}
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bool PlatformLinux::GetSupportedArchitectureAtIndex(uint32_t idx,
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ArchSpec &arch) {
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if (IsHost()) {
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ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
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if (hostArch.GetTriple().isOSLinux()) {
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if (idx == 0) {
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arch = hostArch;
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return arch.IsValid();
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} else if (idx == 1) {
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// If the default host architecture is 64-bit, look for a 32-bit variant
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if (hostArch.IsValid() && hostArch.GetTriple().isArch64Bit()) {
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arch = HostInfo::GetArchitecture(HostInfo::eArchKind32);
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return arch.IsValid();
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}
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}
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}
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} else {
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if (m_remote_platform_sp)
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return m_remote_platform_sp->GetSupportedArchitectureAtIndex(idx, arch);
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llvm::Triple triple;
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// Set the OS to linux
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triple.setOS(llvm::Triple::Linux);
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// Set the architecture
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switch (idx) {
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case 0:
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triple.setArchName("x86_64");
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break;
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case 1:
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triple.setArchName("i386");
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break;
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case 2:
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triple.setArchName("arm");
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break;
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case 3:
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triple.setArchName("aarch64");
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break;
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case 4:
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triple.setArchName("mips64");
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break;
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case 5:
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triple.setArchName("hexagon");
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break;
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case 6:
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triple.setArchName("mips");
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break;
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case 7:
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triple.setArchName("mips64el");
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break;
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case 8:
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triple.setArchName("mipsel");
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break;
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case 9:
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triple.setArchName("s390x");
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break;
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default:
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return false;
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}
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// Leave the vendor as "llvm::Triple:UnknownVendor" and don't specify the
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// vendor by
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// calling triple.SetVendorName("unknown") so that it is a "unspecified
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// unknown".
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// This means when someone calls triple.GetVendorName() it will return an
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// empty string
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// which indicates that the vendor can be set when two architectures are
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// merged
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// Now set the triple into "arch" and return true
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arch.SetTriple(triple);
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return true;
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}
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return false;
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}
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void PlatformLinux::GetStatus(Stream &strm) {
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Platform::GetStatus(strm);
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#ifndef LLDB_DISABLE_POSIX
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// Display local kernel information only when we are running in host mode.
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// Otherwise, we would end up printing non-Linux information (when running
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// on Mac OS for example).
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if (IsHost()) {
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struct utsname un;
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if (uname(&un))
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return;
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strm.Printf(" Kernel: %s\n", un.sysname);
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strm.Printf(" Release: %s\n", un.release);
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strm.Printf(" Version: %s\n", un.version);
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}
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#endif
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}
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int32_t
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PlatformLinux::GetResumeCountForLaunchInfo(ProcessLaunchInfo &launch_info) {
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int32_t resume_count = 0;
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// Always resume past the initial stop when we use eLaunchFlagDebug
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if (launch_info.GetFlags().Test(eLaunchFlagDebug)) {
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// Resume past the stop for the final exec into the true inferior.
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++resume_count;
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}
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// If we're not launching a shell, we're done.
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const FileSpec &shell = launch_info.GetShell();
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if (!shell)
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return resume_count;
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std::string shell_string = shell.GetPath();
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// We're in a shell, so for sure we have to resume past the shell exec.
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++resume_count;
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// Figure out what shell we're planning on using.
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const char *shell_name = strrchr(shell_string.c_str(), '/');
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if (shell_name == NULL)
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shell_name = shell_string.c_str();
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else
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shell_name++;
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if (strcmp(shell_name, "csh") == 0 || strcmp(shell_name, "tcsh") == 0 ||
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strcmp(shell_name, "zsh") == 0 || strcmp(shell_name, "sh") == 0) {
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// These shells seem to re-exec themselves. Add another resume.
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++resume_count;
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}
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return resume_count;
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}
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bool PlatformLinux::CanDebugProcess() {
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if (IsHost()) {
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return true;
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} else {
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// If we're connected, we can debug.
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return IsConnected();
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}
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}
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// For local debugging, Linux will override the debug logic to use llgs-launch
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// rather than
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// lldb-launch, llgs-attach. This differs from current lldb-launch,
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// debugserver-attach
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// approach on MacOSX.
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lldb::ProcessSP
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PlatformLinux::DebugProcess(ProcessLaunchInfo &launch_info, Debugger &debugger,
|
|
Target *target, // Can be NULL, if NULL create a new
|
|
// target, else use existing one
|
|
Error &error) {
|
|
Log *log(GetLogIfAllCategoriesSet(LIBLLDB_LOG_PLATFORM));
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s entered (target %p)", __FUNCTION__,
|
|
static_cast<void *>(target));
|
|
|
|
// If we're a remote host, use standard behavior from parent class.
|
|
if (!IsHost())
|
|
return PlatformPOSIX::DebugProcess(launch_info, debugger, target, error);
|
|
|
|
//
|
|
// For local debugging, we'll insist on having ProcessGDBRemote create the
|
|
// process.
|
|
//
|
|
|
|
ProcessSP process_sp;
|
|
|
|
// Make sure we stop at the entry point
|
|
launch_info.GetFlags().Set(eLaunchFlagDebug);
|
|
|
|
// We always launch the process we are going to debug in a separate process
|
|
// group, since then we can handle ^C interrupts ourselves w/o having to worry
|
|
// about the target getting them as well.
|
|
launch_info.SetLaunchInSeparateProcessGroup(true);
|
|
|
|
// Ensure we have a target.
|
|
if (target == nullptr) {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s creating new target", __FUNCTION__);
|
|
|
|
TargetSP new_target_sp;
|
|
error = debugger.GetTargetList().CreateTarget(
|
|
debugger, nullptr, nullptr, false, nullptr, new_target_sp);
|
|
if (error.Fail()) {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s failed to create new target: %s",
|
|
__FUNCTION__, error.AsCString());
|
|
return process_sp;
|
|
}
|
|
|
|
target = new_target_sp.get();
|
|
if (!target) {
|
|
error.SetErrorString("CreateTarget() returned nullptr");
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s failed: %s", __FUNCTION__,
|
|
error.AsCString());
|
|
return process_sp;
|
|
}
|
|
} else {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s using provided target", __FUNCTION__);
|
|
}
|
|
|
|
// Mark target as currently selected target.
|
|
debugger.GetTargetList().SetSelectedTarget(target);
|
|
|
|
// Now create the gdb-remote process.
|
|
if (log)
|
|
log->Printf(
|
|
"PlatformLinux::%s having target create process with gdb-remote plugin",
|
|
__FUNCTION__);
|
|
process_sp = target->CreateProcess(
|
|
launch_info.GetListenerForProcess(debugger), "gdb-remote", nullptr);
|
|
|
|
if (!process_sp) {
|
|
error.SetErrorString("CreateProcess() failed for gdb-remote process");
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s failed: %s", __FUNCTION__,
|
|
error.AsCString());
|
|
return process_sp;
|
|
} else {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s successfully created process",
|
|
__FUNCTION__);
|
|
}
|
|
|
|
// Adjust launch for a hijacker.
|
|
ListenerSP listener_sp;
|
|
if (!launch_info.GetHijackListener()) {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s setting up hijacker", __FUNCTION__);
|
|
|
|
listener_sp =
|
|
Listener::MakeListener("lldb.PlatformLinux.DebugProcess.hijack");
|
|
launch_info.SetHijackListener(listener_sp);
|
|
process_sp->HijackProcessEvents(listener_sp);
|
|
}
|
|
|
|
// Log file actions.
|
|
if (log) {
|
|
log->Printf(
|
|
"PlatformLinux::%s launching process with the following file actions:",
|
|
__FUNCTION__);
|
|
|
|
StreamString stream;
|
|
size_t i = 0;
|
|
const FileAction *file_action;
|
|
while ((file_action = launch_info.GetFileActionAtIndex(i++)) != nullptr) {
|
|
file_action->Dump(stream);
|
|
log->PutCString(stream.GetString().c_str());
|
|
stream.Clear();
|
|
}
|
|
}
|
|
|
|
// Do the launch.
|
|
error = process_sp->Launch(launch_info);
|
|
if (error.Success()) {
|
|
// Handle the hijacking of process events.
|
|
if (listener_sp) {
|
|
const StateType state = process_sp->WaitForProcessToStop(
|
|
std::chrono::microseconds(0), NULL, false, listener_sp);
|
|
|
|
if (state == eStateStopped) {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s pid %" PRIu64 " state %s\n",
|
|
__FUNCTION__, process_sp->GetID(), StateAsCString(state));
|
|
} else {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s pid %" PRIu64
|
|
" state is not stopped - %s\n",
|
|
__FUNCTION__, process_sp->GetID(), StateAsCString(state));
|
|
}
|
|
}
|
|
|
|
// Hook up process PTY if we have one (which we should for local debugging
|
|
// with llgs).
|
|
int pty_fd = launch_info.GetPTY().ReleaseMasterFileDescriptor();
|
|
if (pty_fd != lldb_utility::PseudoTerminal::invalid_fd) {
|
|
process_sp->SetSTDIOFileDescriptor(pty_fd);
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s pid %" PRIu64
|
|
" hooked up STDIO pty to process",
|
|
__FUNCTION__, process_sp->GetID());
|
|
} else {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s pid %" PRIu64
|
|
" not using process STDIO pty",
|
|
__FUNCTION__, process_sp->GetID());
|
|
}
|
|
} else {
|
|
if (log)
|
|
log->Printf("PlatformLinux::%s process launch failed: %s", __FUNCTION__,
|
|
error.AsCString());
|
|
// FIXME figure out appropriate cleanup here. Do we delete the target? Do
|
|
// we delete the process? Does our caller do that?
|
|
}
|
|
|
|
return process_sp;
|
|
}
|
|
|
|
void PlatformLinux::CalculateTrapHandlerSymbolNames() {
|
|
m_trap_handlers.push_back(ConstString("_sigtramp"));
|
|
}
|
|
|
|
uint64_t PlatformLinux::ConvertMmapFlagsToPlatform(const ArchSpec &arch,
|
|
unsigned flags) {
|
|
uint64_t flags_platform = 0;
|
|
uint64_t map_anon = MAP_ANON;
|
|
|
|
// To get correct flags for MIPS Architecture
|
|
if (arch.GetTriple().getArch() == llvm::Triple::mips64 ||
|
|
arch.GetTriple().getArch() == llvm::Triple::mips64el ||
|
|
arch.GetTriple().getArch() == llvm::Triple::mips ||
|
|
arch.GetTriple().getArch() == llvm::Triple::mipsel)
|
|
map_anon = 0x800;
|
|
|
|
if (flags & eMmapFlagsPrivate)
|
|
flags_platform |= MAP_PRIVATE;
|
|
if (flags & eMmapFlagsAnon)
|
|
flags_platform |= map_anon;
|
|
return flags_platform;
|
|
}
|
|
|
|
ConstString PlatformLinux::GetFullNameForDylib(ConstString basename) {
|
|
if (basename.IsEmpty())
|
|
return basename;
|
|
|
|
StreamString stream;
|
|
stream.Printf("lib%s.so", basename.GetCString());
|
|
return ConstString(stream.GetData());
|
|
}
|