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//===-- PlatformNetBSD.cpp ------------------------------------------------===//
//
// 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 "PlatformNetBSD.h"
#include "lldb/Host/Config.h"
#include <cstdio>
#if LLDB_ENABLE_POSIX
#include <sys/utsname.h>
#endif
#include "lldb/Core/Debugger.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/FileSpec.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/State.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/StreamString.h"
// Define these constants from NetBSD mman.h for use when targeting remote
// netbsd systems even when host has different values.
#define MAP_PRIVATE 0x0002
#define MAP_ANON 0x1000
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::platform_netbsd;
LLDB_PLUGIN_DEFINE(PlatformNetBSD)
static uint32_t g_initialize_count = 0;
PlatformSP PlatformNetBSD::CreateInstance(bool force, const ArchSpec *arch) {
Log *log = GetLog(LLDBLog::Platform);
LLDB_LOG(log, "force = {0}, arch=({1}, {2})", force,
arch ? arch->GetArchitectureName() : "<null>",
arch ? arch->GetTriple().getTriple() : "<null>");
bool create = force;
if (!create && arch && arch->IsValid()) {
const llvm::Triple &triple = arch->GetTriple();
switch (triple.getOS()) {
case llvm::Triple::NetBSD:
create = true;
break;
default:
break;
}
}
LLDB_LOG(log, "create = {0}", create);
if (create) {
return PlatformSP(new PlatformNetBSD(false));
}
return PlatformSP();
}
llvm::StringRef PlatformNetBSD::GetPluginDescriptionStatic(bool is_host) {
if (is_host)
return "Local NetBSD user platform plug-in.";
return "Remote NetBSD user platform plug-in.";
}
void PlatformNetBSD::Initialize() {
PlatformPOSIX::Initialize();
if (g_initialize_count++ == 0) {
#if defined(__NetBSD__)
PlatformSP default_platform_sp(new PlatformNetBSD(true));
default_platform_sp->SetSystemArchitecture(HostInfo::GetArchitecture());
Platform::SetHostPlatform(default_platform_sp);
#endif
PluginManager::RegisterPlugin(
PlatformNetBSD::GetPluginNameStatic(false),
PlatformNetBSD::GetPluginDescriptionStatic(false),
PlatformNetBSD::CreateInstance, nullptr);
}
}
void PlatformNetBSD::Terminate() {
if (g_initialize_count > 0) {
if (--g_initialize_count == 0) {
PluginManager::UnregisterPlugin(PlatformNetBSD::CreateInstance);
}
}
PlatformPOSIX::Terminate();
}
/// Default Constructor
PlatformNetBSD::PlatformNetBSD(bool is_host)
: PlatformPOSIX(is_host) // This is the local host platform
{
if (is_host) {
ArchSpec hostArch = HostInfo::GetArchitecture(HostInfo::eArchKindDefault);
m_supported_architectures.push_back(hostArch);
if (hostArch.GetTriple().isArch64Bit()) {
m_supported_architectures.push_back(
HostInfo::GetArchitecture(HostInfo::eArchKind32));
}
} else {
m_supported_architectures = CreateArchList(
{llvm::Triple::x86_64, llvm::Triple::x86}, llvm::Triple::NetBSD);
}
}
std::vector<ArchSpec>
PlatformNetBSD::GetSupportedArchitectures(const ArchSpec &process_host_arch) {
if (m_remote_platform_sp)
return m_remote_platform_sp->GetSupportedArchitectures(process_host_arch);
return m_supported_architectures;
}
void PlatformNetBSD::GetStatus(Stream &strm) {
Platform::GetStatus(strm);
#if LLDB_ENABLE_POSIX
// Display local kernel information only when we are running in host mode.
// Otherwise, we would end up printing non-NetBSD information (when running
// on Mac OS for example).
if (IsHost()) {
struct utsname un;
if (uname(&un))
return;
strm.Printf(" Kernel: %s\n", un.sysname);
strm.Printf(" Release: %s\n", un.release);
strm.Printf(" Version: %s\n", un.version);
}
#endif
}
uint32_t
PlatformNetBSD::GetResumeCountForLaunchInfo(ProcessLaunchInfo &launch_info) {
uint32_t resume_count = 0;
// Always resume past the initial stop when we use eLaunchFlagDebug
if (launch_info.GetFlags().Test(eLaunchFlagDebug)) {
// Resume past the stop for the final exec into the true inferior.
++resume_count;
}
// If we're not launching a shell, we're done.
const FileSpec &shell = launch_info.GetShell();
if (!shell)
return resume_count;
std::string shell_string = shell.GetPath();
// We're in a shell, so for sure we have to resume past the shell exec.
++resume_count;
// Figure out what shell we're planning on using.
const char *shell_name = strrchr(shell_string.c_str(), '/');
if (shell_name == nullptr)
shell_name = shell_string.c_str();
else
shell_name++;
if (strcmp(shell_name, "csh") == 0 || strcmp(shell_name, "tcsh") == 0 ||
strcmp(shell_name, "zsh") == 0 || strcmp(shell_name, "sh") == 0) {
// These shells seem to re-exec themselves. Add another resume.
++resume_count;
}
return resume_count;
}
bool PlatformNetBSD::CanDebugProcess() {
if (IsHost()) {
return true;
} else {
// If we're connected, we can debug.
return IsConnected();
}
}
void PlatformNetBSD::CalculateTrapHandlerSymbolNames() {
m_trap_handlers.push_back(ConstString("_sigtramp"));
}
MmapArgList PlatformNetBSD::GetMmapArgumentList(const ArchSpec &arch,
addr_t addr, addr_t length,
unsigned prot, unsigned flags,
addr_t fd, addr_t offset) {
uint64_t flags_platform = 0;
if (flags & eMmapFlagsPrivate)
flags_platform |= MAP_PRIVATE;
if (flags & eMmapFlagsAnon)
flags_platform |= MAP_ANON;
MmapArgList args({addr, length, prot, flags_platform, fd, offset});
return args;
}
CompilerType PlatformNetBSD::GetSiginfoType(const llvm::Triple &triple) {
{
std::lock_guard<std::mutex> guard(m_mutex);
if (!m_type_system)
m_type_system = std::make_shared<TypeSystemClang>("siginfo", triple);
}
TypeSystemClang *ast = m_type_system.get();
// generic types
CompilerType int_type = ast->GetBasicType(eBasicTypeInt);
CompilerType uint_type = ast->GetBasicType(eBasicTypeUnsignedInt);
CompilerType long_type = ast->GetBasicType(eBasicTypeLong);
CompilerType long_long_type = ast->GetBasicType(eBasicTypeLongLong);
CompilerType voidp_type = ast->GetBasicType(eBasicTypeVoid).GetPointerType();
// platform-specific types
CompilerType &pid_type = int_type;
CompilerType &uid_type = uint_type;
CompilerType &clock_type = uint_type;
CompilerType &lwpid_type = int_type;
CompilerType sigval_type = ast->CreateRecordType(
nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_sigval_t",
clang::TTK_Union, lldb::eLanguageTypeC);
ast->StartTagDeclarationDefinition(sigval_type);
ast->AddFieldToRecordType(sigval_type, "sival_int", int_type,
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(sigval_type, "sival_ptr", voidp_type,
lldb::eAccessPublic, 0);
ast->CompleteTagDeclarationDefinition(sigval_type);
CompilerType ptrace_option_type = ast->CreateRecordType(
nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "",
clang::TTK_Union, lldb::eLanguageTypeC);
ast->StartTagDeclarationDefinition(ptrace_option_type);
ast->AddFieldToRecordType(ptrace_option_type, "_pe_other_pid", pid_type,
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(ptrace_option_type, "_pe_lwp", lwpid_type,
lldb::eAccessPublic, 0);
ast->CompleteTagDeclarationDefinition(ptrace_option_type);
// siginfo_t
CompilerType siginfo_type = ast->CreateRecordType(
nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "__lldb_siginfo_t",
clang::TTK_Union, lldb::eLanguageTypeC);
ast->StartTagDeclarationDefinition(siginfo_type);
// struct _ksiginfo
CompilerType ksiginfo_type = ast->CreateRecordType(
nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "",
clang::TTK_Struct, lldb::eLanguageTypeC);
ast->StartTagDeclarationDefinition(ksiginfo_type);
ast->AddFieldToRecordType(ksiginfo_type, "_signo", int_type,
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(ksiginfo_type, "_code", int_type,
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(ksiginfo_type, "_errno", int_type,
lldb::eAccessPublic, 0);
// the structure is padded on 64-bit arches to fix alignment
if (triple.isArch64Bit())
ast->AddFieldToRecordType(ksiginfo_type, "__pad0", int_type,
lldb::eAccessPublic, 0);
// union used to hold the signal data
CompilerType union_type = ast->CreateRecordType(
nullptr, OptionalClangModuleID(), lldb::eAccessPublic, "",
clang::TTK_Union, lldb::eLanguageTypeC);
ast->StartTagDeclarationDefinition(union_type);
ast->AddFieldToRecordType(
union_type, "_rt",
ast->CreateStructForIdentifier(llvm::StringRef(),
{
{"_pid", pid_type},
{"_uid", uid_type},
{"_value", sigval_type},
}),
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(
union_type, "_child",
ast->CreateStructForIdentifier(llvm::StringRef(),
{
{"_pid", pid_type},
{"_uid", uid_type},
{"_status", int_type},
{"_utime", clock_type},
{"_stime", clock_type},
}),
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(
union_type, "_fault",
ast->CreateStructForIdentifier(llvm::StringRef(),
{
{"_addr", voidp_type},
{"_trap", int_type},
{"_trap2", int_type},
{"_trap3", int_type},
}),
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(
union_type, "_poll",
ast->CreateStructForIdentifier(llvm::StringRef(),
{
{"_band", long_type},
{"_fd", int_type},
}),
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(union_type, "_syscall",
ast->CreateStructForIdentifier(
llvm::StringRef(),
{
{"_sysnum", int_type},
{"_retval", int_type.GetArrayType(2)},
{"_error", int_type},
{"_args", long_long_type.GetArrayType(8)},
}),
lldb::eAccessPublic, 0);
ast->AddFieldToRecordType(
union_type, "_ptrace_state",
ast->CreateStructForIdentifier(llvm::StringRef(),
{
{"_pe_report_event", int_type},
{"_option", ptrace_option_type},
}),
lldb::eAccessPublic, 0);
ast->CompleteTagDeclarationDefinition(union_type);
ast->AddFieldToRecordType(ksiginfo_type, "_reason", union_type,
lldb::eAccessPublic, 0);
ast->CompleteTagDeclarationDefinition(ksiginfo_type);
ast->AddFieldToRecordType(siginfo_type, "_info", ksiginfo_type,
lldb::eAccessPublic, 0);
ast->CompleteTagDeclarationDefinition(siginfo_type);
return siginfo_type;
}
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