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llvm-project/lldb/source/Host/common/Host.cpp

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//===-- Host.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/lldb-python.h"
// C includes
#include <dlfcn.h>
#include <errno.h>
#include <grp.h>
#include <limits.h>
#include <netdb.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/sysctl.h>
#include <unistd.h>
#if defined (__APPLE__)
#include <dispatch/dispatch.h>
#include <libproc.h>
#include <mach-o/dyld.h>
#include <mach/mach_port.h>
#endif
#if defined (__linux__) || defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
#include <sys/wait.h>
#endif
#if defined (__FreeBSD__)
#include <pthread_np.h>
#endif
#include "lldb/Host/Host.h"
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/ConstString.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/Error.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Core/ThreadSafeSTLMap.h"
#include "lldb/Host/Config.h"
#include "lldb/Host/Endian.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Host/Mutex.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/TargetList.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MachO.h"
#include "llvm/ADT/Twine.h"
using namespace lldb;
using namespace lldb_private;
#if !defined (__APPLE__)
struct MonitorInfo
{
lldb::pid_t pid; // The process ID to monitor
Host::MonitorChildProcessCallback callback; // The callback function to call when "pid" exits or signals
void *callback_baton; // The callback baton for the callback function
bool monitor_signals; // If true, call the callback when "pid" gets signaled.
};
static void *
MonitorChildProcessThreadFunction (void *arg);
lldb::thread_t
Host::StartMonitoringChildProcess
(
Host::MonitorChildProcessCallback callback,
void *callback_baton,
lldb::pid_t pid,
bool monitor_signals
)
{
lldb::thread_t thread = LLDB_INVALID_HOST_THREAD;
MonitorInfo * info_ptr = new MonitorInfo();
info_ptr->pid = pid;
info_ptr->callback = callback;
info_ptr->callback_baton = callback_baton;
info_ptr->monitor_signals = monitor_signals;
char thread_name[256];
::snprintf (thread_name, sizeof(thread_name), "<lldb.host.wait4(pid=%" PRIu64 ")>", pid);
thread = ThreadCreate (thread_name,
MonitorChildProcessThreadFunction,
info_ptr,
NULL);
return thread;
}
//------------------------------------------------------------------
// Scoped class that will disable thread canceling when it is
// constructed, and exception safely restore the previous value it
// when it goes out of scope.
//------------------------------------------------------------------
class ScopedPThreadCancelDisabler
{
public:
ScopedPThreadCancelDisabler()
{
// Disable the ability for this thread to be cancelled
int err = ::pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &m_old_state);
if (err != 0)
m_old_state = -1;
}
~ScopedPThreadCancelDisabler()
{
// Restore the ability for this thread to be cancelled to what it
// previously was.
if (m_old_state != -1)
::pthread_setcancelstate (m_old_state, 0);
}
private:
int m_old_state; // Save the old cancelability state.
};
static void *
MonitorChildProcessThreadFunction (void *arg)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS));
const char *function = __FUNCTION__;
if (log)
log->Printf ("%s (arg = %p) thread starting...", function, arg);
MonitorInfo *info = (MonitorInfo *)arg;
const Host::MonitorChildProcessCallback callback = info->callback;
void * const callback_baton = info->callback_baton;
const lldb::pid_t pid = info->pid;
const bool monitor_signals = info->monitor_signals;
delete info;
int status = -1;
#if defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
#define __WALL 0
#endif
const int options = __WALL;
while (1)
{
log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf("%s ::wait_pid (pid = %" PRIu64 ", &status, options = %i)...", function, pid, options);
// Wait for all child processes
::pthread_testcancel ();
// Get signals from all children with same process group of pid
const lldb::pid_t wait_pid = ::waitpid (-1*pid, &status, options);
::pthread_testcancel ();
if (wait_pid == -1)
{
if (errno == EINTR)
continue;
else
{
if (log)
log->Printf ("%s (arg = %p) thread exiting because waitpid failed (%s)...", __FUNCTION__, arg, strerror(errno));
break;
}
}
else if (wait_pid > 0)
{
bool exited = false;
int signal = 0;
int exit_status = 0;
const char *status_cstr = NULL;
if (WIFSTOPPED(status))
{
signal = WSTOPSIG(status);
status_cstr = "STOPPED";
}
else if (WIFEXITED(status))
{
exit_status = WEXITSTATUS(status);
status_cstr = "EXITED";
exited = true;
}
else if (WIFSIGNALED(status))
{
signal = WTERMSIG(status);
status_cstr = "SIGNALED";
if (wait_pid == pid) {
exited = true;
exit_status = -1;
}
}
else
{
status_cstr = "(\?\?\?)";
}
// Scope for pthread_cancel_disabler
{
ScopedPThreadCancelDisabler pthread_cancel_disabler;
log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("%s ::waitpid (pid = %" PRIu64 ", &status, options = %i) => pid = %" PRIu64 ", status = 0x%8.8x (%s), signal = %i, exit_state = %i",
function,
wait_pid,
options,
pid,
status,
status_cstr,
signal,
exit_status);
if (exited || (signal != 0 && monitor_signals))
{
bool callback_return = false;
if (callback)
callback_return = callback (callback_baton, wait_pid, exited, signal, exit_status);
// If our process exited, then this thread should exit
if (exited && wait_pid == pid)
{
if (log)
log->Printf ("%s (arg = %p) thread exiting because pid received exit signal...", __FUNCTION__, arg);
break;
}
// If the callback returns true, it means this process should
// exit
if (callback_return)
{
if (log)
log->Printf ("%s (arg = %p) thread exiting because callback returned true...", __FUNCTION__, arg);
break;
}
}
}
}
}
log = lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_PROCESS);
if (log)
log->Printf ("%s (arg = %p) thread exiting...", __FUNCTION__, arg);
return NULL;
}
void
Host::SystemLog (SystemLogType type, const char *format, va_list args)
{
vfprintf (stderr, format, args);
}
#endif // #if !defined (__APPLE__)
void
Host::SystemLog (SystemLogType type, const char *format, ...)
{
va_list args;
va_start (args, format);
SystemLog (type, format, args);
va_end (args);
}
size_t
Host::GetPageSize()
{
return ::getpagesize();
}
const ArchSpec &
Host::GetArchitecture (SystemDefaultArchitecture arch_kind)
{
static bool g_supports_32 = false;
static bool g_supports_64 = false;
static ArchSpec g_host_arch_32;
static ArchSpec g_host_arch_64;
#if defined (__APPLE__)
// Apple is different in that it can support both 32 and 64 bit executables
// in the same operating system running concurrently. Here we detect the
// correct host architectures for both 32 and 64 bit including if 64 bit
// executables are supported on the system.
if (g_supports_32 == false && g_supports_64 == false)
{
// All apple systems support 32 bit execution.
g_supports_32 = true;
uint32_t cputype, cpusubtype;
uint32_t is_64_bit_capable = false;
size_t len = sizeof(cputype);
ArchSpec host_arch;
// These will tell us about the kernel architecture, which even on a 64
// bit machine can be 32 bit...
if (::sysctlbyname("hw.cputype", &cputype, &len, NULL, 0) == 0)
{
len = sizeof (cpusubtype);
if (::sysctlbyname("hw.cpusubtype", &cpusubtype, &len, NULL, 0) != 0)
cpusubtype = CPU_TYPE_ANY;
len = sizeof (is_64_bit_capable);
if (::sysctlbyname("hw.cpu64bit_capable", &is_64_bit_capable, &len, NULL, 0) == 0)
{
if (is_64_bit_capable)
g_supports_64 = true;
}
if (is_64_bit_capable)
{
#if defined (__i386__) || defined (__x86_64__)
if (cpusubtype == CPU_SUBTYPE_486)
cpusubtype = CPU_SUBTYPE_I386_ALL;
#endif
if (cputype & CPU_ARCH_ABI64)
{
// We have a 64 bit kernel on a 64 bit system
g_host_arch_32.SetArchitecture (eArchTypeMachO, ~(CPU_ARCH_MASK) & cputype, cpusubtype);
g_host_arch_64.SetArchitecture (eArchTypeMachO, cputype, cpusubtype);
}
else
{
// We have a 32 bit kernel on a 64 bit system
g_host_arch_32.SetArchitecture (eArchTypeMachO, cputype, cpusubtype);
cputype |= CPU_ARCH_ABI64;
g_host_arch_64.SetArchitecture (eArchTypeMachO, cputype, cpusubtype);
}
}
else
{
g_host_arch_32.SetArchitecture (eArchTypeMachO, cputype, cpusubtype);
g_host_arch_64.Clear();
}
}
}
#else // #if defined (__APPLE__)
if (g_supports_32 == false && g_supports_64 == false)
{
llvm::Triple triple(llvm::sys::getDefaultTargetTriple());
g_host_arch_32.Clear();
g_host_arch_64.Clear();
// If the OS is Linux, "unknown" in the vendor slot isn't what we want
// for the default triple. It's probably an artifact of config.guess.
if (triple.getOS() == llvm::Triple::Linux && triple.getVendor() == llvm::Triple::UnknownVendor)
triple.setVendorName("");
switch (triple.getArch())
{
default:
g_host_arch_32.SetTriple(triple);
g_supports_32 = true;
break;
case llvm::Triple::x86_64:
g_host_arch_64.SetTriple(triple);
g_supports_64 = true;
g_host_arch_32.SetTriple(triple.get32BitArchVariant());
g_supports_32 = true;
break;
case llvm::Triple::sparcv9:
case llvm::Triple::ppc64:
g_host_arch_64.SetTriple(triple);
g_supports_64 = true;
break;
}
g_supports_32 = g_host_arch_32.IsValid();
g_supports_64 = g_host_arch_64.IsValid();
}
#endif // #else for #if defined (__APPLE__)
if (arch_kind == eSystemDefaultArchitecture32)
return g_host_arch_32;
else if (arch_kind == eSystemDefaultArchitecture64)
return g_host_arch_64;
if (g_supports_64)
return g_host_arch_64;
return g_host_arch_32;
}
const ConstString &
Host::GetVendorString()
{
static ConstString g_vendor;
if (!g_vendor)
{
const ArchSpec &host_arch = GetArchitecture (eSystemDefaultArchitecture);
const llvm::StringRef &str_ref = host_arch.GetTriple().getVendorName();
g_vendor.SetCStringWithLength(str_ref.data(), str_ref.size());
}
return g_vendor;
}
const ConstString &
Host::GetOSString()
{
static ConstString g_os_string;
if (!g_os_string)
{
const ArchSpec &host_arch = GetArchitecture (eSystemDefaultArchitecture);
const llvm::StringRef &str_ref = host_arch.GetTriple().getOSName();
g_os_string.SetCStringWithLength(str_ref.data(), str_ref.size());
}
return g_os_string;
}
const ConstString &
Host::GetTargetTriple()
{
static ConstString g_host_triple;
if (!(g_host_triple))
{
const ArchSpec &host_arch = GetArchitecture (eSystemDefaultArchitecture);
g_host_triple.SetCString(host_arch.GetTriple().getTriple().c_str());
}
return g_host_triple;
}
lldb::pid_t
Host::GetCurrentProcessID()
{
return ::getpid();
}
lldb::tid_t
Host::GetCurrentThreadID()
{
#if defined (__APPLE__)
// Calling "mach_port_deallocate()" bumps the reference count on the thread
// port, so we need to deallocate it. mach_task_self() doesn't bump the ref
// count.
thread_port_t thread_self = mach_thread_self();
mach_port_deallocate(mach_task_self(), thread_self);
return thread_self;
#elif defined(__FreeBSD__)
return lldb::tid_t(pthread_getthreadid_np());
#else
return lldb::tid_t(pthread_self());
#endif
}
lldb::thread_t
Host::GetCurrentThread ()
{
return lldb::thread_t(pthread_self());
}
const char *
Host::GetSignalAsCString (int signo)
{
switch (signo)
{
case SIGHUP: return "SIGHUP"; // 1 hangup
case SIGINT: return "SIGINT"; // 2 interrupt
case SIGQUIT: return "SIGQUIT"; // 3 quit
case SIGILL: return "SIGILL"; // 4 illegal instruction (not reset when caught)
case SIGTRAP: return "SIGTRAP"; // 5 trace trap (not reset when caught)
case SIGABRT: return "SIGABRT"; // 6 abort()
#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))
case SIGPOLL: return "SIGPOLL"; // 7 pollable event ([XSR] generated, not supported)
#endif
#if !defined(_POSIX_C_SOURCE)
case SIGEMT: return "SIGEMT"; // 7 EMT instruction
#endif
case SIGFPE: return "SIGFPE"; // 8 floating point exception
case SIGKILL: return "SIGKILL"; // 9 kill (cannot be caught or ignored)
case SIGBUS: return "SIGBUS"; // 10 bus error
case SIGSEGV: return "SIGSEGV"; // 11 segmentation violation
case SIGSYS: return "SIGSYS"; // 12 bad argument to system call
case SIGPIPE: return "SIGPIPE"; // 13 write on a pipe with no one to read it
case SIGALRM: return "SIGALRM"; // 14 alarm clock
case SIGTERM: return "SIGTERM"; // 15 software termination signal from kill
case SIGURG: return "SIGURG"; // 16 urgent condition on IO channel
case SIGSTOP: return "SIGSTOP"; // 17 sendable stop signal not from tty
case SIGTSTP: return "SIGTSTP"; // 18 stop signal from tty
case SIGCONT: return "SIGCONT"; // 19 continue a stopped process
case SIGCHLD: return "SIGCHLD"; // 20 to parent on child stop or exit
case SIGTTIN: return "SIGTTIN"; // 21 to readers pgrp upon background tty read
case SIGTTOU: return "SIGTTOU"; // 22 like TTIN for output if (tp->t_local&LTOSTOP)
#if !defined(_POSIX_C_SOURCE)
case SIGIO: return "SIGIO"; // 23 input/output possible signal
#endif
case SIGXCPU: return "SIGXCPU"; // 24 exceeded CPU time limit
case SIGXFSZ: return "SIGXFSZ"; // 25 exceeded file size limit
case SIGVTALRM: return "SIGVTALRM"; // 26 virtual time alarm
case SIGPROF: return "SIGPROF"; // 27 profiling time alarm
#if !defined(_POSIX_C_SOURCE)
case SIGWINCH: return "SIGWINCH"; // 28 window size changes
case SIGINFO: return "SIGINFO"; // 29 information request
#endif
case SIGUSR1: return "SIGUSR1"; // 30 user defined signal 1
case SIGUSR2: return "SIGUSR2"; // 31 user defined signal 2
default:
break;
}
return NULL;
}
void
Host::WillTerminate ()
{
}
#if !defined (__APPLE__) && !defined (__FreeBSD__) && !defined (__FreeBSD_kernel__) && !defined (__linux__) // see macosx/Host.mm
void
Host::ThreadCreated (const char *thread_name)
{
}
void
Host::Backtrace (Stream &strm, uint32_t max_frames)
{
// TODO: Is there a way to backtrace the current process on linux? Other systems?
}
size_t
Host::GetEnvironment (StringList &env)
{
// TODO: Is there a way to the host environment for this process on linux? Other systems?
return 0;
}
#endif // #if !defined (__APPLE__) && !defined (__FreeBSD__) && !defined (__FreeBSD_kernel__) && !defined (__linux__)
struct HostThreadCreateInfo
{
std::string thread_name;
thread_func_t thread_fptr;
thread_arg_t thread_arg;
HostThreadCreateInfo (const char *name, thread_func_t fptr, thread_arg_t arg) :
thread_name (name ? name : ""),
thread_fptr (fptr),
thread_arg (arg)
{
}
};
static thread_result_t
ThreadCreateTrampoline (thread_arg_t arg)
{
HostThreadCreateInfo *info = (HostThreadCreateInfo *)arg;
Host::ThreadCreated (info->thread_name.c_str());
thread_func_t thread_fptr = info->thread_fptr;
thread_arg_t thread_arg = info->thread_arg;
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_THREAD));
if (log)
log->Printf("thread created");
delete info;
return thread_fptr (thread_arg);
}
lldb::thread_t
Host::ThreadCreate
(
const char *thread_name,
thread_func_t thread_fptr,
thread_arg_t thread_arg,
Error *error
)
{
lldb::thread_t thread = LLDB_INVALID_HOST_THREAD;
// Host::ThreadCreateTrampoline will delete this pointer for us.
HostThreadCreateInfo *info_ptr = new HostThreadCreateInfo (thread_name, thread_fptr, thread_arg);
int err = ::pthread_create (&thread, NULL, ThreadCreateTrampoline, info_ptr);
if (err == 0)
{
if (error)
error->Clear();
return thread;
}
if (error)
error->SetError (err, eErrorTypePOSIX);
return LLDB_INVALID_HOST_THREAD;
}
bool
Host::ThreadCancel (lldb::thread_t thread, Error *error)
{
int err = ::pthread_cancel (thread);
if (error)
error->SetError(err, eErrorTypePOSIX);
return err == 0;
}
bool
Host::ThreadDetach (lldb::thread_t thread, Error *error)
{
int err = ::pthread_detach (thread);
if (error)
error->SetError(err, eErrorTypePOSIX);
return err == 0;
}
bool
Host::ThreadJoin (lldb::thread_t thread, thread_result_t *thread_result_ptr, Error *error)
{
int err = ::pthread_join (thread, thread_result_ptr);
if (error)
error->SetError(err, eErrorTypePOSIX);
return err == 0;
}
std::string
Host::GetThreadName (lldb::pid_t pid, lldb::tid_t tid)
{
std::string thread_name;
#if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_5
// We currently can only get the name of a thread in the current process.
if (pid == Host::GetCurrentProcessID())
{
char pthread_name[1024];
if (::pthread_getname_np (::pthread_from_mach_thread_np (tid), pthread_name, sizeof(pthread_name)) == 0)
{
if (pthread_name[0])
{
thread_name = pthread_name;
}
}
else
{
dispatch_queue_t current_queue = ::dispatch_get_current_queue ();
if (current_queue != NULL)
{
const char *queue_name = dispatch_queue_get_label (current_queue);
if (queue_name && queue_name[0])
{
thread_name = queue_name;
}
}
}
}
#endif
return thread_name;
}
bool
Host::SetThreadName (lldb::pid_t pid, lldb::tid_t tid, const char *name)
{
#if defined(__APPLE__) && MAC_OS_X_VERSION_MAX_ALLOWED > MAC_OS_X_VERSION_10_5
lldb::pid_t curr_pid = Host::GetCurrentProcessID();
lldb::tid_t curr_tid = Host::GetCurrentThreadID();
if (pid == LLDB_INVALID_PROCESS_ID)
pid = curr_pid;
if (tid == LLDB_INVALID_THREAD_ID)
tid = curr_tid;
// Set the pthread name if possible
if (pid == curr_pid && tid == curr_tid)
{
if (::pthread_setname_np (name) == 0)
return true;
}
return false;
#elif defined (__linux__) || defined (__GLIBC__)
void *fn = dlsym (RTLD_DEFAULT, "pthread_setname_np");
if (fn)
{
int (*pthread_setname_np_func)(pthread_t thread, const char *name);
*reinterpret_cast<void **> (&pthread_setname_np_func) = fn;
lldb::pid_t curr_pid = Host::GetCurrentProcessID();
lldb::tid_t curr_tid = Host::GetCurrentThreadID();
if (pid == LLDB_INVALID_PROCESS_ID)
pid = curr_pid;
if (tid == LLDB_INVALID_THREAD_ID)
tid = curr_tid;
if (pid == curr_pid)
{
if (pthread_setname_np_func (tid, name) == 0)
return true;
}
}
return false;
#else
return false;
#endif
}
FileSpec
Host::GetProgramFileSpec ()
{
static FileSpec g_program_filespec;
if (!g_program_filespec)
{
#if defined (__APPLE__)
char program_fullpath[PATH_MAX];
// If DST is NULL, then return the number of bytes needed.
uint32_t len = sizeof(program_fullpath);
int err = _NSGetExecutablePath (program_fullpath, &len);
if (err == 0)
g_program_filespec.SetFile (program_fullpath, false);
else if (err == -1)
{
char *large_program_fullpath = (char *)::malloc (len + 1);
err = _NSGetExecutablePath (large_program_fullpath, &len);
if (err == 0)
g_program_filespec.SetFile (large_program_fullpath, false);
::free (large_program_fullpath);
}
#elif defined (__linux__)
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);
}
#elif defined (__FreeBSD__) || defined (__FreeBSD_kernel__)
int exe_path_mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, getpid() };
size_t exe_path_size;
if (sysctl(exe_path_mib, 4, NULL, &exe_path_size, NULL, 0) == 0)
{
char *exe_path = new char[exe_path_size];
if (sysctl(exe_path_mib, 4, exe_path, &exe_path_size, NULL, 0) == 0)
g_program_filespec.SetFile(exe_path, false);
delete[] exe_path;
}
#endif
}
return g_program_filespec;
}
FileSpec
Host::GetModuleFileSpecForHostAddress (const void *host_addr)
{
FileSpec module_filespec;
Dl_info info;
if (::dladdr (host_addr, &info))
{
if (info.dli_fname)
module_filespec.SetFile(info.dli_fname, true);
}
return module_filespec;
}
#if !defined (__APPLE__) // see Host.mm
bool
Host::GetBundleDirectory (const FileSpec &file, FileSpec &bundle)
{
bundle.Clear();
return false;
}
bool
Host::ResolveExecutableInBundle (FileSpec &file)
{
return false;
}
#endif
// Opaque info that tracks a dynamic library that was loaded
struct DynamicLibraryInfo
{
DynamicLibraryInfo (const FileSpec &fs, int o, void *h) :
file_spec (fs),
open_options (o),
handle (h)
{
}
const FileSpec file_spec;
uint32_t open_options;
void * handle;
};
void *
Host::DynamicLibraryOpen (const FileSpec &file_spec, uint32_t options, Error &error)
{
char path[PATH_MAX];
if (file_spec.GetPath(path, sizeof(path)))
{
int mode = 0;
if (options & eDynamicLibraryOpenOptionLazy)
mode |= RTLD_LAZY;
else
mode |= RTLD_NOW;
if (options & eDynamicLibraryOpenOptionLocal)
mode |= RTLD_LOCAL;
else
mode |= RTLD_GLOBAL;
#ifdef LLDB_CONFIG_DLOPEN_RTLD_FIRST_SUPPORTED
if (options & eDynamicLibraryOpenOptionLimitGetSymbol)
mode |= RTLD_FIRST;
#endif
void * opaque = ::dlopen (path, mode);
if (opaque)
{
error.Clear();
return new DynamicLibraryInfo (file_spec, options, opaque);
}
else
{
error.SetErrorString(::dlerror());
}
}
else
{
error.SetErrorString("failed to extract path");
}
return NULL;
}
Error
Host::DynamicLibraryClose (void *opaque)
{
Error error;
if (opaque == NULL)
{
error.SetErrorString ("invalid dynamic library handle");
}
else
{
DynamicLibraryInfo *dylib_info = (DynamicLibraryInfo *) opaque;
if (::dlclose (dylib_info->handle) != 0)
{
error.SetErrorString(::dlerror());
}
dylib_info->open_options = 0;
dylib_info->handle = 0;
delete dylib_info;
}
return error;
}
void *
Host::DynamicLibraryGetSymbol (void *opaque, const char *symbol_name, Error &error)
{
if (opaque == NULL)
{
error.SetErrorString ("invalid dynamic library handle");
}
else
{
DynamicLibraryInfo *dylib_info = (DynamicLibraryInfo *) opaque;
void *symbol_addr = ::dlsym (dylib_info->handle, symbol_name);
if (symbol_addr)
{
#ifndef LLDB_CONFIG_DLOPEN_RTLD_FIRST_SUPPORTED
// This host doesn't support limiting searches to this shared library
// so we need to verify that the match came from this shared library
// if it was requested in the Host::DynamicLibraryOpen() function.
if (dylib_info->open_options & eDynamicLibraryOpenOptionLimitGetSymbol)
{
FileSpec match_dylib_spec (Host::GetModuleFileSpecForHostAddress (symbol_addr));
if (match_dylib_spec != dylib_info->file_spec)
{
char dylib_path[PATH_MAX];
if (dylib_info->file_spec.GetPath (dylib_path, sizeof(dylib_path)))
error.SetErrorStringWithFormat ("symbol not found in \"%s\"", dylib_path);
else
error.SetErrorString ("symbol not found");
return NULL;
}
}
#endif
error.Clear();
return symbol_addr;
}
else
{
error.SetErrorString(::dlerror());
}
}
return NULL;
}
bool
Host::GetLLDBPath (PathType path_type, FileSpec &file_spec)
{
// To get paths related to LLDB we get the path to the executable that
// contains this function. On MacOSX this will be "LLDB.framework/.../LLDB",
// on linux this is assumed to be the "lldb" main executable. If LLDB on
// linux is actually in a shared library (lldb.so??) then this function will
// need to be modified to "do the right thing".
switch (path_type)
{
case ePathTypeLLDBShlibDir:
{
static ConstString g_lldb_so_dir;
if (!g_lldb_so_dir)
{
FileSpec lldb_file_spec (Host::GetModuleFileSpecForHostAddress ((void *)Host::GetLLDBPath));
g_lldb_so_dir = lldb_file_spec.GetDirectory();
}
file_spec.GetDirectory() = g_lldb_so_dir;
return file_spec.GetDirectory();
}
break;
case ePathTypeSupportExecutableDir:
{
static ConstString g_lldb_support_exe_dir;
if (!g_lldb_support_exe_dir)
{
FileSpec lldb_file_spec;
if (GetLLDBPath (ePathTypeLLDBShlibDir, lldb_file_spec))
{
char raw_path[PATH_MAX];
char resolved_path[PATH_MAX];
lldb_file_spec.GetPath(raw_path, sizeof(raw_path));
#if defined (__APPLE__)
char *framework_pos = ::strstr (raw_path, "LLDB.framework");
if (framework_pos)
{
framework_pos += strlen("LLDB.framework");
#if !defined (__arm__)
::strncpy (framework_pos, "/Resources", PATH_MAX - (framework_pos - raw_path));
#endif
}
#endif
FileSpec::Resolve (raw_path, resolved_path, sizeof(resolved_path));
g_lldb_support_exe_dir.SetCString(resolved_path);
}
}
file_spec.GetDirectory() = g_lldb_support_exe_dir;
return file_spec.GetDirectory();
}
break;
case ePathTypeHeaderDir:
{
static ConstString g_lldb_headers_dir;
if (!g_lldb_headers_dir)
{
#if defined (__APPLE__)
FileSpec lldb_file_spec;
if (GetLLDBPath (ePathTypeLLDBShlibDir, lldb_file_spec))
{
char raw_path[PATH_MAX];
char resolved_path[PATH_MAX];
lldb_file_spec.GetPath(raw_path, sizeof(raw_path));
char *framework_pos = ::strstr (raw_path, "LLDB.framework");
if (framework_pos)
{
framework_pos += strlen("LLDB.framework");
::strncpy (framework_pos, "/Headers", PATH_MAX - (framework_pos - raw_path));
}
FileSpec::Resolve (raw_path, resolved_path, sizeof(resolved_path));
g_lldb_headers_dir.SetCString(resolved_path);
}
#else
// TODO: Anyone know how we can determine this for linux? Other systems??
g_lldb_headers_dir.SetCString ("/opt/local/include/lldb");
#endif
}
file_spec.GetDirectory() = g_lldb_headers_dir;
return file_spec.GetDirectory();
}
break;
case ePathTypePythonDir:
{
static ConstString g_lldb_python_dir;
if (!g_lldb_python_dir)
{
FileSpec lldb_file_spec;
if (GetLLDBPath (ePathTypeLLDBShlibDir, lldb_file_spec))
{
char raw_path[PATH_MAX];
char resolved_path[PATH_MAX];
lldb_file_spec.GetPath(raw_path, sizeof(raw_path));
#if defined (__APPLE__)
char *framework_pos = ::strstr (raw_path, "LLDB.framework");
if (framework_pos)
{
framework_pos += strlen("LLDB.framework");
::strncpy (framework_pos, "/Resources/Python", PATH_MAX - (framework_pos - raw_path));
}
#else
llvm::Twine python_version_dir;
python_version_dir = "/python"
+ llvm::Twine(PY_MAJOR_VERSION)
+ "."
+ llvm::Twine(PY_MINOR_VERSION)
+ "/site-packages";
// We may get our string truncated. Should we protect
// this with an assert?
::strncat(raw_path, python_version_dir.str().c_str(),
sizeof(raw_path) - strlen(raw_path) - 1);
#endif
FileSpec::Resolve (raw_path, resolved_path, sizeof(resolved_path));
g_lldb_python_dir.SetCString(resolved_path);
}
}
file_spec.GetDirectory() = g_lldb_python_dir;
return file_spec.GetDirectory();
}
break;
case ePathTypeLLDBSystemPlugins: // System plug-ins directory
{
#if defined (__APPLE__)
static ConstString g_lldb_system_plugin_dir;
static bool g_lldb_system_plugin_dir_located = false;
if (!g_lldb_system_plugin_dir_located)
{
g_lldb_system_plugin_dir_located = true;
FileSpec lldb_file_spec;
if (GetLLDBPath (ePathTypeLLDBShlibDir, lldb_file_spec))
{
char raw_path[PATH_MAX];
char resolved_path[PATH_MAX];
lldb_file_spec.GetPath(raw_path, sizeof(raw_path));
char *framework_pos = ::strstr (raw_path, "LLDB.framework");
if (framework_pos)
{
framework_pos += strlen("LLDB.framework");
::strncpy (framework_pos, "/Resources/PlugIns", PATH_MAX - (framework_pos - raw_path));
FileSpec::Resolve (raw_path, resolved_path, sizeof(resolved_path));
g_lldb_system_plugin_dir.SetCString(resolved_path);
}
return false;
}
}
if (g_lldb_system_plugin_dir)
{
file_spec.GetDirectory() = g_lldb_system_plugin_dir;
return true;
}
#endif
// TODO: where would system LLDB plug-ins be located on linux? Other systems?
return false;
}
break;
case ePathTypeLLDBUserPlugins: // User plug-ins directory
{
#if defined (__APPLE__)
static ConstString g_lldb_user_plugin_dir;
if (!g_lldb_user_plugin_dir)
{
char user_plugin_path[PATH_MAX];
if (FileSpec::Resolve ("~/Library/Application Support/LLDB/PlugIns",
user_plugin_path,
sizeof(user_plugin_path)))
{
g_lldb_user_plugin_dir.SetCString(user_plugin_path);
}
}
file_spec.GetDirectory() = g_lldb_user_plugin_dir;
return file_spec.GetDirectory();
#endif
// TODO: where would user LLDB plug-ins be located on linux? Other systems?
return false;
}
}
return false;
}
bool
Host::GetHostname (std::string &s)
{
char hostname[PATH_MAX];
hostname[sizeof(hostname) - 1] = '\0';
if (::gethostname (hostname, sizeof(hostname) - 1) == 0)
{
struct hostent* h = ::gethostbyname (hostname);
if (h)
s.assign (h->h_name);
else
s.assign (hostname);
return true;
}
return false;
}
const char *
Host::GetUserName (uint32_t uid, std::string &user_name)
{
struct passwd user_info;
struct passwd *user_info_ptr = &user_info;
char user_buffer[PATH_MAX];
size_t user_buffer_size = sizeof(user_buffer);
if (::getpwuid_r (uid,
&user_info,
user_buffer,
user_buffer_size,
&user_info_ptr) == 0)
{
if (user_info_ptr)
{
user_name.assign (user_info_ptr->pw_name);
return user_name.c_str();
}
}
user_name.clear();
return NULL;
}
const char *
Host::GetGroupName (uint32_t gid, std::string &group_name)
{
char group_buffer[PATH_MAX];
size_t group_buffer_size = sizeof(group_buffer);
struct group group_info;
struct group *group_info_ptr = &group_info;
// Try the threadsafe version first
if (::getgrgid_r (gid,
&group_info,
group_buffer,
group_buffer_size,
&group_info_ptr) == 0)
{
if (group_info_ptr)
{
group_name.assign (group_info_ptr->gr_name);
return group_name.c_str();
}
}
else
{
// The threadsafe version isn't currently working
// for me on darwin, but the non-threadsafe version
// is, so I am calling it below.
group_info_ptr = ::getgrgid (gid);
if (group_info_ptr)
{
group_name.assign (group_info_ptr->gr_name);
return group_name.c_str();
}
}
group_name.clear();
return NULL;
}
#if !defined (__APPLE__) && !defined (__FreeBSD__) && !defined (__FreeBSD_kernel__) // see macosx/Host.mm
bool
Host::GetOSBuildString (std::string &s)
{
s.clear();
return false;
}
bool
Host::GetOSKernelDescription (std::string &s)
{
s.clear();
return false;
}
#endif
uint32_t
Host::GetUserID ()
{
return getuid();
}
uint32_t
Host::GetGroupID ()
{
return getgid();
}
uint32_t
Host::GetEffectiveUserID ()
{
return geteuid();
}
uint32_t
Host::GetEffectiveGroupID ()
{
return getegid();
}
#if !defined (__APPLE__) && !defined(__linux__)
uint32_t
Host::FindProcesses (const ProcessInstanceInfoMatch &match_info, ProcessInstanceInfoList &process_infos)
{
process_infos.Clear();
return process_infos.GetSize();
}
#endif // #if !defined (__APPLE__) && !defined(__linux__)
#if !defined (__APPLE__) && !defined (__FreeBSD__) && !defined (__FreeBSD_kernel__) && !defined(__linux__)
bool
Host::GetProcessInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info)
{
process_info.Clear();
return false;
}
#endif
#if !defined(__linux__)
bool
Host::FindProcessThreads (const lldb::pid_t pid, TidMap &tids_to_attach)
{
return false;
}
#endif
lldb::TargetSP
Host::GetDummyTarget (lldb_private::Debugger &debugger)
{
static TargetSP g_dummy_target_sp;
// FIXME: Maybe the dummy target should be per-Debugger
if (!g_dummy_target_sp || !g_dummy_target_sp->IsValid())
{
ArchSpec arch(Target::GetDefaultArchitecture());
if (!arch.IsValid())
arch = Host::GetArchitecture ();
Error err = debugger.GetTargetList().CreateTarget(debugger,
NULL,
arch.GetTriple().getTriple().c_str(),
false,
NULL,
g_dummy_target_sp);
}
return g_dummy_target_sp;
}
struct ShellInfo
{
ShellInfo () :
process_reaped (false),
can_delete (false),
pid (LLDB_INVALID_PROCESS_ID),
signo(-1),
status(-1)
{
}
lldb_private::Predicate<bool> process_reaped;
lldb_private::Predicate<bool> can_delete;
lldb::pid_t pid;
int signo;
int status;
};
static bool
MonitorShellCommand (void *callback_baton,
lldb::pid_t pid,
bool exited, // True if the process did exit
int signo, // Zero for no signal
int status) // Exit value of process if signal is zero
{
ShellInfo *shell_info = (ShellInfo *)callback_baton;
shell_info->pid = pid;
shell_info->signo = signo;
shell_info->status = status;
// Let the thread running Host::RunShellCommand() know that the process
// exited and that ShellInfo has been filled in by broadcasting to it
shell_info->process_reaped.SetValue(1, eBroadcastAlways);
// Now wait for a handshake back from that thread running Host::RunShellCommand
// so we know that we can delete shell_info_ptr
shell_info->can_delete.WaitForValueEqualTo(true);
// Sleep a bit to allow the shell_info->can_delete.SetValue() to complete...
usleep(1000);
// Now delete the shell info that was passed into this function
delete shell_info;
return true;
}
Error
Host::RunShellCommand (const char *command,
const char *working_dir,
int *status_ptr,
int *signo_ptr,
std::string *command_output_ptr,
uint32_t timeout_sec,
const char *shell)
{
Error error;
ProcessLaunchInfo launch_info;
if (shell && shell[0])
{
// Run the command in a shell
launch_info.SetShell(shell);
launch_info.GetArguments().AppendArgument(command);
const bool localhost = true;
const bool will_debug = false;
const bool first_arg_is_full_shell_command = true;
launch_info.ConvertArgumentsForLaunchingInShell (error,
localhost,
will_debug,
first_arg_is_full_shell_command);
}
else
{
// No shell, just run it
Args args (command);
const bool first_arg_is_executable = true;
launch_info.SetArguments(args, first_arg_is_executable);
}
if (working_dir)
launch_info.SetWorkingDirectory(working_dir);
char output_file_path_buffer[L_tmpnam];
const char *output_file_path = NULL;
if (command_output_ptr)
{
// Create a temporary file to get the stdout/stderr and redirect the
// output of the command into this file. We will later read this file
// if all goes well and fill the data into "command_output_ptr"
output_file_path = ::tmpnam(output_file_path_buffer);
launch_info.AppendSuppressFileAction (STDIN_FILENO, true, false);
launch_info.AppendOpenFileAction(STDOUT_FILENO, output_file_path, false, true);
launch_info.AppendDuplicateFileAction(STDOUT_FILENO, STDERR_FILENO);
}
else
{
launch_info.AppendSuppressFileAction (STDIN_FILENO, true, false);
launch_info.AppendSuppressFileAction (STDOUT_FILENO, false, true);
launch_info.AppendSuppressFileAction (STDERR_FILENO, false, true);
}
// The process monitor callback will delete the 'shell_info_ptr' below...
std::unique_ptr<ShellInfo> shell_info_ap (new ShellInfo());
const bool monitor_signals = false;
launch_info.SetMonitorProcessCallback(MonitorShellCommand, shell_info_ap.get(), monitor_signals);
error = LaunchProcess (launch_info);
const lldb::pid_t pid = launch_info.GetProcessID();
if (pid != LLDB_INVALID_PROCESS_ID)
{
// The process successfully launched, so we can defer ownership of
// "shell_info" to the MonitorShellCommand callback function that will
// get called when the process dies. We release the unique pointer as it
// doesn't need to delete the ShellInfo anymore.
ShellInfo *shell_info = shell_info_ap.release();
TimeValue timeout_time(TimeValue::Now());
timeout_time.OffsetWithSeconds(timeout_sec);
bool timed_out = false;
shell_info->process_reaped.WaitForValueEqualTo(true, &timeout_time, &timed_out);
if (timed_out)
{
error.SetErrorString("timed out waiting for shell command to complete");
// Kill the process since it didn't complete withint the timeout specified
::kill (pid, SIGKILL);
// Wait for the monitor callback to get the message
timeout_time = TimeValue::Now();
timeout_time.OffsetWithSeconds(1);
timed_out = false;
shell_info->process_reaped.WaitForValueEqualTo(true, &timeout_time, &timed_out);
}
else
{
if (status_ptr)
*status_ptr = shell_info->status;
if (signo_ptr)
*signo_ptr = shell_info->signo;
if (command_output_ptr)
{
command_output_ptr->clear();
FileSpec file_spec(output_file_path, File::eOpenOptionRead);
uint64_t file_size = file_spec.GetByteSize();
if (file_size > 0)
{
if (file_size > command_output_ptr->max_size())
{
error.SetErrorStringWithFormat("shell command output is too large to fit into a std::string");
}
else
{
command_output_ptr->resize(file_size);
file_spec.ReadFileContents(0, &((*command_output_ptr)[0]), command_output_ptr->size(), &error);
}
}
}
}
shell_info->can_delete.SetValue(true, eBroadcastAlways);
}
else
{
error.SetErrorString("failed to get process ID");
}
if (output_file_path)
::unlink (output_file_path);
// Handshake with the monitor thread, or just let it know in advance that
// it can delete "shell_info" in case we timed out and were not able to kill
// the process...
return error;
}
uint32_t
Host::GetNumberCPUS ()
{
static uint32_t g_num_cores = UINT32_MAX;
if (g_num_cores == UINT32_MAX)
{
#if defined(__APPLE__) or defined (__linux__) or defined (__FreeBSD__) or defined (__FreeBSD_kernel__)
g_num_cores = ::sysconf(_SC_NPROCESSORS_ONLN);
#elif defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
// Header file for this might need to be included at the top of this file
SYSTEM_INFO system_info;
::GetSystemInfo (&system_info);
g_num_cores = system_info.dwNumberOfProcessors;
#else
// Assume POSIX support if a host specific case has not been supplied above
g_num_cores = 0;
int num_cores = 0;
size_t num_cores_len = sizeof(num_cores);
#ifdef HW_AVAILCPU
int mib[] = { CTL_HW, HW_AVAILCPU };
#else
int mib[] = { CTL_HW, HW_NCPU };
#endif
/* get the number of CPUs from the system */
if (sysctl(mib, sizeof(mib)/sizeof(int), &num_cores, &num_cores_len, NULL, 0) == 0 && (num_cores > 0))
{
g_num_cores = num_cores;
}
else
{
mib[1] = HW_NCPU;
num_cores_len = sizeof(num_cores);
if (sysctl(mib, sizeof(mib)/sizeof(int), &num_cores, &num_cores_len, NULL, 0) == 0 && (num_cores > 0))
{
if (num_cores > 0)
g_num_cores = num_cores;
}
}
#endif
}
return g_num_cores;
}
#if !defined (__APPLE__)
bool
Host::OpenFileInExternalEditor (const FileSpec &file_spec, uint32_t line_no)
{
return false;
}
void
Host::SetCrashDescriptionWithFormat (const char *format, ...)
{
}
void
Host::SetCrashDescription (const char *description)
{
}
lldb::pid_t
LaunchApplication (const FileSpec &app_file_spec)
{
return LLDB_INVALID_PROCESS_ID;
}
#endif
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