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llvm-project/lldb/source/Host/macosx/Host.mm

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//===-- Host.mm -------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/Host.h"
#include <AvailabilityMacros.h>
#if !defined(MAC_OS_X_VERSION_10_7) || MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
#define NO_XPC_SERVICES 1
#endif
#if !defined(NO_XPC_SERVICES)
#define __XPC_PRIVATE_H__
#include <xpc/xpc.h>
#include "launcherXPCService/LauncherXPCService.h"
#endif
#include <asl.h>
#include <crt_externs.h>
#include <execinfo.h>
#include <grp.h>
#include <libproc.h>
#include <pwd.h>
#include <spawn.h>
#include <stdio.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <unistd.h>
#include "lldb/Core/ArchSpec.h"
#include "lldb/Core/Communication.h"
#include "lldb/Core/ConnectionFileDescriptor.h"
#include "lldb/Core/DataExtractor.h"
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/StreamFile.h"
#include "lldb/Core/StreamString.h"
#include "lldb/Host/Endian.h"
#include "lldb/Host/FileSpec.h"
#include "lldb/Target/Platform.h"
#include "lldb/Target/Process.h"
#include "lldb/Utility/CleanUp.h"
#include "cfcpp/CFCBundle.h"
#include "cfcpp/CFCMutableArray.h"
#include "cfcpp/CFCMutableDictionary.h"
#include "cfcpp/CFCReleaser.h"
#include "cfcpp/CFCString.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MachO.h"
#include <objc/objc-auto.h>
#include <CoreFoundation/CoreFoundation.h>
#include <Foundation/Foundation.h>
#if !defined(__arm__)
#include <Carbon/Carbon.h>
#endif
#ifndef _POSIX_SPAWN_DISABLE_ASLR
#define _POSIX_SPAWN_DISABLE_ASLR 0x0100
#endif
extern "C"
{
int __pthread_chdir(const char *path);
int __pthread_fchdir (int fildes);
}
using namespace lldb;
using namespace lldb_private;
static pthread_once_t g_thread_create_once = PTHREAD_ONCE_INIT;
static pthread_key_t g_thread_create_key = 0;
class MacOSXDarwinThread
{
public:
MacOSXDarwinThread(const char *thread_name) :
m_pool (nil)
{
// Register our thread with the collector if garbage collection is enabled.
if (objc_collectingEnabled())
{
#if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_5
// On Leopard and earlier there is no way objc_registerThreadWithCollector
// function, so we do it manually.
auto_zone_register_thread(auto_zone());
#else
// On SnowLeopard and later we just call the thread registration function.
objc_registerThreadWithCollector();
#endif
}
else
{
m_pool = [[NSAutoreleasePool alloc] init];
}
Host::SetThreadName (LLDB_INVALID_PROCESS_ID, LLDB_INVALID_THREAD_ID, thread_name);
}
~MacOSXDarwinThread()
{
if (m_pool)
{
[m_pool drain];
m_pool = nil;
}
}
static void PThreadDestructor (void *v)
{
if (v)
delete static_cast<MacOSXDarwinThread*>(v);
::pthread_setspecific (g_thread_create_key, NULL);
}
protected:
NSAutoreleasePool * m_pool;
private:
DISALLOW_COPY_AND_ASSIGN (MacOSXDarwinThread);
};
static void
InitThreadCreated()
{
::pthread_key_create (&g_thread_create_key, MacOSXDarwinThread::PThreadDestructor);
}
void
Host::ThreadCreated (const char *thread_name)
{
::pthread_once (&g_thread_create_once, InitThreadCreated);
if (g_thread_create_key)
{
::pthread_setspecific (g_thread_create_key, new MacOSXDarwinThread(thread_name));
}
}
bool
Host::GetBundleDirectory (const FileSpec &file, FileSpec &bundle_directory)
{
#if defined (__APPLE__)
if (file.GetFileType () == FileSpec::eFileTypeDirectory)
{
char path[PATH_MAX];
if (file.GetPath(path, sizeof(path)))
{
CFCBundle bundle (path);
if (bundle.GetPath (path, sizeof(path)))
{
bundle_directory.SetFile (path, false);
return true;
}
}
}
#endif
bundle_directory.Clear();
return false;
}
bool
Host::ResolveExecutableInBundle (FileSpec &file)
{
#if defined (__APPLE__)
if (file.GetFileType () == FileSpec::eFileTypeDirectory)
{
char path[PATH_MAX];
if (file.GetPath(path, sizeof(path)))
{
CFCBundle bundle (path);
CFCReleaser<CFURLRef> url(bundle.CopyExecutableURL ());
if (url.get())
{
if (::CFURLGetFileSystemRepresentation (url.get(), YES, (UInt8*)path, sizeof(path)))
{
file.SetFile(path, false);
return true;
}
}
}
}
#endif
return false;
}
lldb::pid_t
Host::LaunchApplication (const FileSpec &app_file_spec)
{
#if defined (__arm__)
return LLDB_INVALID_PROCESS_ID;
#else
char app_path[PATH_MAX];
app_file_spec.GetPath(app_path, sizeof(app_path));
LSApplicationParameters app_params;
::memset (&app_params, 0, sizeof (app_params));
app_params.flags = kLSLaunchDefaults |
kLSLaunchDontAddToRecents |
kLSLaunchNewInstance;
FSRef app_fsref;
CFCString app_cfstr (app_path, kCFStringEncodingUTF8);
OSStatus error = ::FSPathMakeRef ((const UInt8 *)app_path, &app_fsref, NULL);
// If we found the app, then store away the name so we don't have to re-look it up.
if (error != noErr)
return LLDB_INVALID_PROCESS_ID;
app_params.application = &app_fsref;
ProcessSerialNumber psn;
error = ::LSOpenApplication (&app_params, &psn);
if (error != noErr)
return LLDB_INVALID_PROCESS_ID;
::pid_t pid = LLDB_INVALID_PROCESS_ID;
error = ::GetProcessPID(&psn, &pid);
if (error != noErr)
return LLDB_INVALID_PROCESS_ID;
return pid;
#endif
}
static void *
AcceptPIDFromInferior (void *arg)
{
const char *connect_url = (const char *)arg;
ConnectionFileDescriptor file_conn;
Error error;
if (file_conn.Connect (connect_url, &error) == eConnectionStatusSuccess)
{
char pid_str[256];
::memset (pid_str, 0, sizeof(pid_str));
ConnectionStatus status;
const size_t pid_str_len = file_conn.Read (pid_str, sizeof(pid_str), 0, status, NULL);
if (pid_str_len > 0)
{
int pid = atoi (pid_str);
return (void *)(intptr_t)pid;
}
}
return NULL;
}
static bool
WaitForProcessToSIGSTOP (const lldb::pid_t pid, const int timeout_in_seconds)
{
const int time_delta_usecs = 100000;
const int num_retries = timeout_in_seconds/time_delta_usecs;
for (int i=0; i<num_retries; i++)
{
struct proc_bsdinfo bsd_info;
int error = ::proc_pidinfo (pid, PROC_PIDTBSDINFO,
(uint64_t) 0,
&bsd_info,
PROC_PIDTBSDINFO_SIZE);
switch (error)
{
case EINVAL:
case ENOTSUP:
case ESRCH:
case EPERM:
return false;
default:
break;
case 0:
if (bsd_info.pbi_status == SSTOP)
return true;
}
::usleep (time_delta_usecs);
}
return false;
}
#if !defined(__arm__)
//static lldb::pid_t
//LaunchInNewTerminalWithCommandFile
//(
// const char **argv,
// const char **envp,
// const char *working_dir,
// const ArchSpec *arch_spec,
// bool stop_at_entry,
// bool disable_aslr
//)
//{
// if (!argv || !argv[0])
// return LLDB_INVALID_PROCESS_ID;
//
// OSStatus error = 0;
//
// FileSpec program (argv[0], false);
//
//
// std::string unix_socket_name;
//
// char temp_file_path[PATH_MAX];
// const char *tmpdir = ::getenv ("TMPDIR");
// if (tmpdir == NULL)
// tmpdir = "/tmp/";
// ::snprintf (temp_file_path, sizeof(temp_file_path), "%s%s-XXXXXX", tmpdir, program.GetFilename().AsCString());
//
// if (::mktemp (temp_file_path) == NULL)
// return LLDB_INVALID_PROCESS_ID;
//
// unix_socket_name.assign (temp_file_path);
//
// ::strlcat (temp_file_path, ".command", sizeof (temp_file_path));
//
// StreamFile command_file;
// command_file.GetFile().Open (temp_file_path,
// File::eOpenOptionWrite | File::eOpenOptionCanCreate,
// File::ePermissionsDefault);
//
// if (!command_file.GetFile().IsValid())
// return LLDB_INVALID_PROCESS_ID;
//
// FileSpec darwin_debug_file_spec;
// if (!Host::GetLLDBPath (ePathTypeSupportExecutableDir, darwin_debug_file_spec))
// return LLDB_INVALID_PROCESS_ID;
// darwin_debug_file_spec.GetFilename().SetCString("darwin-debug");
//
// if (!darwin_debug_file_spec.Exists())
// return LLDB_INVALID_PROCESS_ID;
//
// char launcher_path[PATH_MAX];
// darwin_debug_file_spec.GetPath(launcher_path, sizeof(launcher_path));
// command_file.Printf("\"%s\" ", launcher_path);
//
// command_file.Printf("--unix-socket=%s ", unix_socket_name.c_str());
//
// if (arch_spec && arch_spec->IsValid())
// {
// command_file.Printf("--arch=%s ", arch_spec->GetArchitectureName());
// }
//
// if (disable_aslr)
// {
// command_file.PutCString("--disable-aslr ");
// }
//
// command_file.PutCString("-- ");
//
// if (argv)
// {
// for (size_t i=0; argv[i] != NULL; ++i)
// {
// command_file.Printf("\"%s\" ", argv[i]);
// }
// }
// command_file.PutCString("\necho Process exited with status $?\n");
// command_file.GetFile().Close();
// if (::chmod (temp_file_path, S_IRWXU | S_IRWXG) != 0)
// return LLDB_INVALID_PROCESS_ID;
//
// CFCMutableDictionary cf_env_dict;
//
// const bool can_create = true;
// if (envp)
// {
// for (size_t i=0; envp[i] != NULL; ++i)
// {
// const char *env_entry = envp[i];
// const char *equal_pos = strchr(env_entry, '=');
// if (equal_pos)
// {
// std::string env_key (env_entry, equal_pos);
// std::string env_val (equal_pos + 1);
// CFCString cf_env_key (env_key.c_str(), kCFStringEncodingUTF8);
// CFCString cf_env_val (env_val.c_str(), kCFStringEncodingUTF8);
// cf_env_dict.AddValue (cf_env_key.get(), cf_env_val.get(), can_create);
// }
// }
// }
//
// LSApplicationParameters app_params;
// ::memset (&app_params, 0, sizeof (app_params));
// app_params.flags = kLSLaunchDontAddToRecents | kLSLaunchAsync;
// app_params.argv = NULL;
// app_params.environment = (CFDictionaryRef)cf_env_dict.get();
//
// CFCReleaser<CFURLRef> command_file_url (::CFURLCreateFromFileSystemRepresentation (NULL,
// (const UInt8 *)temp_file_path,
// strlen(temp_file_path),
// false));
//
// CFCMutableArray urls;
//
// // Terminal.app will open the ".command" file we have created
// // and run our process inside it which will wait at the entry point
// // for us to attach.
// urls.AppendValue(command_file_url.get());
//
//
// lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
//
// Error lldb_error;
// // Sleep and wait a bit for debugserver to start to listen...
// char connect_url[128];
// ::snprintf (connect_url, sizeof(connect_url), "unix-accept://%s", unix_socket_name.c_str());
//
// // Spawn a new thread to accept incoming connection on the connect_url
// // so we can grab the pid from the inferior
// lldb::thread_t accept_thread = Host::ThreadCreate (unix_socket_name.c_str(),
// AcceptPIDFromInferior,
// connect_url,
// &lldb_error);
//
// ProcessSerialNumber psn;
// error = LSOpenURLsWithRole(urls.get(), kLSRolesShell, NULL, &app_params, &psn, 1);
// if (error == noErr)
// {
// thread_result_t accept_thread_result = NULL;
// if (Host::ThreadJoin (accept_thread, &accept_thread_result, &lldb_error))
// {
// if (accept_thread_result)
// {
// pid = (intptr_t)accept_thread_result;
//
// // Wait for process to be stopped the the entry point by watching
// // for the process status to be set to SSTOP which indicates it it
// // SIGSTOP'ed at the entry point
// WaitForProcessToSIGSTOP (pid, 5);
// }
// }
// }
// else
// {
// Host::ThreadCancel (accept_thread, &lldb_error);
// }
//
// return pid;
//}
const char *applscript_in_new_tty =
"tell application \"Terminal\"\n"
" do script \"%s\"\n"
"end tell\n";
const char *applscript_in_existing_tty = "\
set the_shell_script to \"%s\"\n\
tell application \"Terminal\"\n\
repeat with the_window in (get windows)\n\
repeat with the_tab in tabs of the_window\n\
set the_tty to tty in the_tab\n\
if the_tty contains \"%s\" then\n\
if the_tab is not busy then\n\
set selected of the_tab to true\n\
set frontmost of the_window to true\n\
do script the_shell_script in the_tab\n\
return\n\
end if\n\
end if\n\
end repeat\n\
end repeat\n\
do script the_shell_script\n\
end tell\n";
static Error
LaunchInNewTerminalWithAppleScript (const char *exe_path, ProcessLaunchInfo &launch_info)
{
Error error;
char unix_socket_name[PATH_MAX] = "/tmp/XXXXXX";
if (::mktemp (unix_socket_name) == NULL)
{
error.SetErrorString ("failed to make temporary path for a unix socket");
return error;
}
StreamString command;
FileSpec darwin_debug_file_spec;
if (!Host::GetLLDBPath (ePathTypeSupportExecutableDir, darwin_debug_file_spec))
{
error.SetErrorString ("can't locate the 'darwin-debug' executable");
return error;
}
darwin_debug_file_spec.GetFilename().SetCString("darwin-debug");
if (!darwin_debug_file_spec.Exists())
{
error.SetErrorStringWithFormat ("the 'darwin-debug' executable doesn't exists at %s/%s",
darwin_debug_file_spec.GetDirectory().GetCString(),
darwin_debug_file_spec.GetFilename().GetCString());
return error;
}
char launcher_path[PATH_MAX];
darwin_debug_file_spec.GetPath(launcher_path, sizeof(launcher_path));
const ArchSpec &arch_spec = launch_info.GetArchitecture();
if (arch_spec.IsValid())
command.Printf("arch -arch %s ", arch_spec.GetArchitectureName());
command.Printf("'%s' --unix-socket=%s", launcher_path, unix_socket_name);
if (arch_spec.IsValid())
command.Printf(" --arch=%s", arch_spec.GetArchitectureName());
const char *working_dir = launch_info.GetWorkingDirectory();
if (working_dir)
command.Printf(" --working-dir '%s'", working_dir);
if (launch_info.GetFlags().Test (eLaunchFlagDisableASLR))
command.PutCString(" --disable-aslr");
command.PutCString(" -- ");
const char **argv = launch_info.GetArguments().GetConstArgumentVector ();
if (argv)
{
for (size_t i=0; argv[i] != NULL; ++i)
{
if (i==0)
command.Printf(" '%s'", exe_path);
else
command.Printf(" '%s'", argv[i]);
}
}
else
{
command.Printf(" '%s'", exe_path);
}
command.PutCString (" ; echo Process exited with status $?");
StreamString applescript_source;
const char *tty_command = command.GetString().c_str();
// if (tty_name && tty_name[0])
// {
// applescript_source.Printf (applscript_in_existing_tty,
// tty_command,
// tty_name);
// }
// else
// {
applescript_source.Printf (applscript_in_new_tty,
tty_command);
// }
const char *script_source = applescript_source.GetString().c_str();
//puts (script_source);
NSAppleScript* applescript = [[NSAppleScript alloc] initWithSource:[NSString stringWithCString:script_source encoding:NSUTF8StringEncoding]];
lldb::pid_t pid = LLDB_INVALID_PROCESS_ID;
Error lldb_error;
// Sleep and wait a bit for debugserver to start to listen...
ConnectionFileDescriptor file_conn;
char connect_url[128];
::snprintf (connect_url, sizeof(connect_url), "unix-accept://%s", unix_socket_name);
// Spawn a new thread to accept incoming connection on the connect_url
// so we can grab the pid from the inferior. We have to do this because we
// are sending an AppleScript that will launch a process in Terminal.app,
// in a shell and the shell will fork/exec a couple of times before we get
// to the process that we wanted to launch. So when our process actually
// gets launched, we will handshake with it and get the process ID for it.
lldb::thread_t accept_thread = Host::ThreadCreate (unix_socket_name,
AcceptPIDFromInferior,
connect_url,
&lldb_error);
[applescript executeAndReturnError:nil];
thread_result_t accept_thread_result = NULL;
if (Host::ThreadJoin (accept_thread, &accept_thread_result, &lldb_error))
{
if (accept_thread_result)
{
pid = (intptr_t)accept_thread_result;
// Wait for process to be stopped the the entry point by watching
// for the process status to be set to SSTOP which indicates it it
// SIGSTOP'ed at the entry point
WaitForProcessToSIGSTOP (pid, 5);
}
}
::unlink (unix_socket_name);
[applescript release];
if (pid != LLDB_INVALID_PROCESS_ID)
launch_info.SetProcessID (pid);
return error;
}
#endif // #if !defined(__arm__)
// On MacOSX CrashReporter will display a string for each shared library if
// the shared library has an exported symbol named "__crashreporter_info__".
static Mutex&
GetCrashReporterMutex ()
{
static Mutex g_mutex;
return g_mutex;
}
extern "C" {
const char *__crashreporter_info__ = NULL;
}
asm(".desc ___crashreporter_info__, 0x10");
void
Host::SetCrashDescriptionWithFormat (const char *format, ...)
{
static StreamString g_crash_description;
Mutex::Locker locker (GetCrashReporterMutex ());
if (format)
{
va_list args;
va_start (args, format);
g_crash_description.GetString().clear();
g_crash_description.PrintfVarArg(format, args);
va_end (args);
__crashreporter_info__ = g_crash_description.GetData();
}
else
{
__crashreporter_info__ = NULL;
}
}
void
Host::SetCrashDescription (const char *cstr)
{
Mutex::Locker locker (GetCrashReporterMutex ());
static std::string g_crash_description;
if (cstr)
{
g_crash_description.assign (cstr);
__crashreporter_info__ = g_crash_description.c_str();
}
else
{
__crashreporter_info__ = NULL;
}
}
bool
Host::OpenFileInExternalEditor (const FileSpec &file_spec, uint32_t line_no)
{
#if defined(__arm__)
return false;
#else
// We attach this to an 'odoc' event to specify a particular selection
typedef struct {
int16_t reserved0; // must be zero
int16_t fLineNumber;
int32_t fSelStart;
int32_t fSelEnd;
uint32_t reserved1; // must be zero
uint32_t reserved2; // must be zero
} BabelAESelInfo;
LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_HOST));
char file_path[PATH_MAX];
file_spec.GetPath(file_path, PATH_MAX);
CFCString file_cfstr (file_path, kCFStringEncodingUTF8);
CFCReleaser<CFURLRef> file_URL (::CFURLCreateWithFileSystemPath (NULL,
file_cfstr.get(),
kCFURLPOSIXPathStyle,
false));
if (log)
log->Printf("Sending source file: \"%s\" and line: %d to external editor.\n", file_path, line_no);
long error;
BabelAESelInfo file_and_line_info =
{
0, // reserved0
(int16_t)(line_no - 1), // fLineNumber (zero based line number)
1, // fSelStart
1024, // fSelEnd
0, // reserved1
0 // reserved2
};
AEKeyDesc file_and_line_desc;
error = ::AECreateDesc (typeUTF8Text,
&file_and_line_info,
sizeof (file_and_line_info),
&(file_and_line_desc.descContent));
if (error != noErr)
{
if (log)
log->Printf("Error creating AEDesc: %ld.\n", error);
return false;
}
file_and_line_desc.descKey = keyAEPosition;
static std::string g_app_name;
static FSRef g_app_fsref;
LSApplicationParameters app_params;
::memset (&app_params, 0, sizeof (app_params));
app_params.flags = kLSLaunchDefaults |
kLSLaunchDontAddToRecents |
kLSLaunchDontSwitch;
char *external_editor = ::getenv ("LLDB_EXTERNAL_EDITOR");
if (external_editor)
{
if (log)
log->Printf("Looking for external editor \"%s\".\n", external_editor);
if (g_app_name.empty() || strcmp (g_app_name.c_str(), external_editor) != 0)
{
CFCString editor_name (external_editor, kCFStringEncodingUTF8);
error = ::LSFindApplicationForInfo (kLSUnknownCreator,
NULL,
editor_name.get(),
&g_app_fsref,
NULL);
// If we found the app, then store away the name so we don't have to re-look it up.
if (error != noErr)
{
if (log)
log->Printf("Could not find External Editor application, error: %ld.\n", error);
return false;
}
}
app_params.application = &g_app_fsref;
}
ProcessSerialNumber psn;
CFCReleaser<CFArrayRef> file_array(CFArrayCreate (NULL, (const void **) file_URL.ptr_address(false), 1, NULL));
error = ::LSOpenURLsWithRole (file_array.get(),
kLSRolesAll,
&file_and_line_desc,
&app_params,
&psn,
1);
AEDisposeDesc (&(file_and_line_desc.descContent));
if (error != noErr)
{
if (log)
log->Printf("LSOpenURLsWithRole failed, error: %ld.\n", error);
return false;
}
ProcessInfoRec which_process;
::memset(&which_process, 0, sizeof(which_process));
unsigned char ap_name[PATH_MAX];
which_process.processName = ap_name;
error = ::GetProcessInformation (&psn, &which_process);
bool using_xcode;
if (error != noErr)
{
if (log)
log->Printf("GetProcessInformation failed, error: %ld.\n", error);
using_xcode = false;
}
else
using_xcode = strncmp((char *) ap_name+1, "Xcode", (int) ap_name[0]) == 0;
// Xcode doesn't obey the line number in the Open Apple Event. So I have to send
// it an AppleScript to focus on the right line.
if (using_xcode)
{
static ComponentInstance osa_component = NULL;
static const char *as_template = "tell application \"Xcode\"\n"
"set doc to the first document whose path is \"%s\"\n"
"set the selection to paragraph %d of doc\n"
"--- set the selected paragraph range to {%d, %d} of doc\n"
"end tell\n";
const int chars_for_int = 32;
static int as_template_len = strlen (as_template);
char *as_str;
AEDesc as_desc;
if (osa_component == NULL)
{
osa_component = ::OpenDefaultComponent (kOSAComponentType,
kAppleScriptSubtype);
}
if (osa_component == NULL)
{
if (log)
log->Printf("Could not get default AppleScript component.\n");
return false;
}
uint32_t as_str_size = as_template_len + strlen (file_path) + 3 * chars_for_int + 1;
as_str = (char *) malloc (as_str_size);
::snprintf (as_str,
as_str_size - 1,
as_template,
file_path,
line_no,
line_no,
line_no);
error = ::AECreateDesc (typeChar,
as_str,
strlen (as_str),
&as_desc);
::free (as_str);
if (error != noErr)
{
if (log)
log->Printf("Failed to create AEDesc for Xcode AppleEvent: %ld.\n", error);
return false;
}
OSAID ret_OSAID;
error = ::OSACompileExecute (osa_component,
&as_desc,
kOSANullScript,
kOSAModeNeverInteract,
&ret_OSAID);
::OSADispose (osa_component, ret_OSAID);
::AEDisposeDesc (&as_desc);
if (error != noErr)
{
if (log)
log->Printf("Sending AppleEvent to Xcode failed, error: %ld.\n", error);
return false;
}
}
return true;
#endif // #if !defined(__arm__)
}
void
Host::Backtrace (Stream &strm, uint32_t max_frames)
{
if (max_frames > 0)
{
std::vector<void *> frame_buffer (max_frames, NULL);
int num_frames = ::backtrace (&frame_buffer[0], frame_buffer.size());
char** strs = ::backtrace_symbols (&frame_buffer[0], num_frames);
if (strs)
{
// Start at 1 to skip the "Host::Backtrace" frame
for (int i = 1; i < num_frames; ++i)
strm.Printf("%s\n", strs[i]);
::free (strs);
}
}
}
size_t
Host::GetEnvironment (StringList &env)
{
char **host_env = *_NSGetEnviron();
char *env_entry;
size_t i;
for (i=0; (env_entry = host_env[i]) != NULL; ++i)
env.AppendString(env_entry);
return i;
}
bool
Host::GetOSBuildString (std::string &s)
{
int mib[2] = { CTL_KERN, KERN_OSVERSION };
char cstr[PATH_MAX];
size_t cstr_len = sizeof(cstr);
if (::sysctl (mib, 2, cstr, &cstr_len, NULL, 0) == 0)
{
s.assign (cstr, cstr_len);
return true;
}
s.clear();
return false;
}
bool
Host::GetOSKernelDescription (std::string &s)
{
int mib[2] = { CTL_KERN, KERN_VERSION };
char cstr[PATH_MAX];
size_t cstr_len = sizeof(cstr);
if (::sysctl (mib, 2, cstr, &cstr_len, NULL, 0) == 0)
{
s.assign (cstr, cstr_len);
return true;
}
s.clear();
return false;
}
#include <libxml/parser.h>
#include <libxml/tree.h>
bool
Host::GetOSVersion
(
uint32_t &major,
uint32_t &minor,
uint32_t &update
)
{
static const char *version_plist_file = "/System/Library/CoreServices/SystemVersion.plist";
char buffer[256];
const char *product_version_str = NULL;
CFCReleaser<CFURLRef> plist_url(CFURLCreateFromFileSystemRepresentation(kCFAllocatorDefault,
(UInt8 *) version_plist_file,
strlen (version_plist_file), NO));
if (plist_url.get())
{
CFCReleaser<CFPropertyListRef> property_list;
CFCReleaser<CFStringRef> error_string;
CFCReleaser<CFDataRef> resource_data;
SInt32 error_code;
// Read the XML file.
if (CFURLCreateDataAndPropertiesFromResource (kCFAllocatorDefault,
plist_url.get(),
resource_data.ptr_address(),
NULL,
NULL,
&error_code))
{
// Reconstitute the dictionary using the XML data.
property_list = CFPropertyListCreateFromXMLData (kCFAllocatorDefault,
resource_data.get(),
kCFPropertyListImmutable,
error_string.ptr_address());
if (CFGetTypeID(property_list.get()) == CFDictionaryGetTypeID())
{
CFDictionaryRef property_dict = (CFDictionaryRef) property_list.get();
CFStringRef product_version_key = CFSTR("ProductVersion");
CFPropertyListRef product_version_value;
product_version_value = CFDictionaryGetValue(property_dict, product_version_key);
if (product_version_value && CFGetTypeID(product_version_value) == CFStringGetTypeID())
{
CFStringRef product_version_cfstr = (CFStringRef) product_version_value;
product_version_str = CFStringGetCStringPtr(product_version_cfstr, kCFStringEncodingUTF8);
if (product_version_str == NULL) {
if (CFStringGetCString(product_version_cfstr, buffer, 256, kCFStringEncodingUTF8))
product_version_str = buffer;
}
}
}
}
}
if (product_version_str)
{
Args::StringToVersion(product_version_str, major, minor, update);
return true;
}
else
return false;
}
static bool
GetMacOSXProcessName (const ProcessInstanceInfoMatch *match_info_ptr,
ProcessInstanceInfo &process_info)
{
if (process_info.ProcessIDIsValid())
{
char process_name[MAXCOMLEN * 2 + 1];
int name_len = ::proc_name(process_info.GetProcessID(), process_name, MAXCOMLEN * 2);
if (name_len == 0)
return false;
if (match_info_ptr == NULL || NameMatches(process_name,
match_info_ptr->GetNameMatchType(),
match_info_ptr->GetProcessInfo().GetName()))
{
process_info.GetExecutableFile().SetFile (process_name, false);
return true;
}
}
process_info.GetExecutableFile().Clear();
return false;
}
static bool
GetMacOSXProcessCPUType (ProcessInstanceInfo &process_info)
{
if (process_info.ProcessIDIsValid())
{
// Make a new mib to stay thread safe
int mib[CTL_MAXNAME]={0,};
size_t mib_len = CTL_MAXNAME;
if (::sysctlnametomib("sysctl.proc_cputype", mib, &mib_len))
return false;
mib[mib_len] = process_info.GetProcessID();
mib_len++;
cpu_type_t cpu, sub = 0;
size_t len = sizeof(cpu);
if (::sysctl (mib, mib_len, &cpu, &len, 0, 0) == 0)
{
switch (cpu)
{
case llvm::MachO::CPUTypeI386: sub = llvm::MachO::CPUSubType_I386_ALL; break;
case llvm::MachO::CPUTypeX86_64: sub = llvm::MachO::CPUSubType_X86_64_ALL; break;
case llvm::MachO::CPUTypeARM:
{
uint32_t cpusubtype = 0;
len = sizeof(cpusubtype);
if (::sysctlbyname("hw.cpusubtype", &cpusubtype, &len, NULL, 0) == 0)
sub = cpusubtype;
}
break;
default:
break;
}
process_info.GetArchitecture ().SetArchitecture (eArchTypeMachO, cpu, sub);
return true;
}
}
process_info.GetArchitecture().Clear();
return false;
}
static bool
GetMacOSXProcessArgs (const ProcessInstanceInfoMatch *match_info_ptr,
ProcessInstanceInfo &process_info)
{
if (process_info.ProcessIDIsValid())
{
int proc_args_mib[3] = { CTL_KERN, KERN_PROCARGS2, (int)process_info.GetProcessID() };
char arg_data[8192];
size_t arg_data_size = sizeof(arg_data);
if (::sysctl (proc_args_mib, 3, arg_data, &arg_data_size , NULL, 0) == 0)
{
DataExtractor data (arg_data, arg_data_size, lldb::endian::InlHostByteOrder(), sizeof(void *));
lldb::offset_t offset = 0;
uint32_t argc = data.GetU32 (&offset);
const char *cstr;
cstr = data.GetCStr (&offset);
if (cstr)
{
process_info.GetExecutableFile().SetFile(cstr, false);
if (match_info_ptr == NULL ||
NameMatches (process_info.GetExecutableFile().GetFilename().GetCString(),
match_info_ptr->GetNameMatchType(),
match_info_ptr->GetProcessInfo().GetName()))
{
// Skip NULLs
while (1)
{
const uint8_t *p = data.PeekData(offset, 1);
if ((p == NULL) || (*p != '\0'))
break;
++offset;
}
// Now extract all arguments
Args &proc_args = process_info.GetArguments();
for (int i=0; i<argc; ++i)
{
cstr = data.GetCStr(&offset);
if (cstr)
proc_args.AppendArgument(cstr);
}
return true;
}
}
}
}
return false;
}
static bool
GetMacOSXProcessUserAndGroup (ProcessInstanceInfo &process_info)
{
if (process_info.ProcessIDIsValid())
{
int mib[4];
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PID;
mib[3] = process_info.GetProcessID();
struct kinfo_proc proc_kinfo;
size_t proc_kinfo_size = sizeof(struct kinfo_proc);
if (::sysctl (mib, 4, &proc_kinfo, &proc_kinfo_size, NULL, 0) == 0)
{
if (proc_kinfo_size > 0)
{
process_info.SetParentProcessID (proc_kinfo.kp_eproc.e_ppid);
process_info.SetUserID (proc_kinfo.kp_eproc.e_pcred.p_ruid);
process_info.SetGroupID (proc_kinfo.kp_eproc.e_pcred.p_rgid);
process_info.SetEffectiveUserID (proc_kinfo.kp_eproc.e_ucred.cr_uid);
if (proc_kinfo.kp_eproc.e_ucred.cr_ngroups > 0)
process_info.SetEffectiveGroupID (proc_kinfo.kp_eproc.e_ucred.cr_groups[0]);
else
process_info.SetEffectiveGroupID (UINT32_MAX);
return true;
}
}
}
process_info.SetParentProcessID (LLDB_INVALID_PROCESS_ID);
process_info.SetUserID (UINT32_MAX);
process_info.SetGroupID (UINT32_MAX);
process_info.SetEffectiveUserID (UINT32_MAX);
process_info.SetEffectiveGroupID (UINT32_MAX);
return false;
}
uint32_t
Host::FindProcesses (const ProcessInstanceInfoMatch &match_info, ProcessInstanceInfoList &process_infos)
{
std::vector<struct kinfo_proc> kinfos;
int mib[3] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL };
size_t pid_data_size = 0;
if (::sysctl (mib, 4, NULL, &pid_data_size, NULL, 0) != 0)
return 0;
// Add a few extra in case a few more show up
const size_t estimated_pid_count = (pid_data_size / sizeof(struct kinfo_proc)) + 10;
kinfos.resize (estimated_pid_count);
pid_data_size = kinfos.size() * sizeof(struct kinfo_proc);
if (::sysctl (mib, 4, &kinfos[0], &pid_data_size, NULL, 0) != 0)
return 0;
const size_t actual_pid_count = (pid_data_size / sizeof(struct kinfo_proc));
bool all_users = match_info.GetMatchAllUsers();
const lldb::pid_t our_pid = getpid();
const uid_t our_uid = getuid();
for (int i = 0; i < actual_pid_count; i++)
{
const struct kinfo_proc &kinfo = kinfos[i];
bool kinfo_user_matches = false;
if (all_users)
kinfo_user_matches = true;
else
kinfo_user_matches = kinfo.kp_eproc.e_pcred.p_ruid == our_uid;
// Special case, if lldb is being run as root we can attach to anything.
if (our_uid == 0)
kinfo_user_matches = true;
if (kinfo_user_matches == false || // Make sure the user is acceptable
kinfo.kp_proc.p_pid == our_pid || // Skip this process
kinfo.kp_proc.p_pid == 0 || // Skip kernel (kernel pid is zero)
kinfo.kp_proc.p_stat == SZOMB || // Zombies are bad, they like brains...
kinfo.kp_proc.p_flag & P_TRACED || // Being debugged?
kinfo.kp_proc.p_flag & P_WEXIT || // Working on exiting?
kinfo.kp_proc.p_flag & P_TRANSLATED) // Skip translated ppc (Rosetta)
continue;
ProcessInstanceInfo process_info;
process_info.SetProcessID (kinfo.kp_proc.p_pid);
process_info.SetParentProcessID (kinfo.kp_eproc.e_ppid);
process_info.SetUserID (kinfo.kp_eproc.e_pcred.p_ruid);
process_info.SetGroupID (kinfo.kp_eproc.e_pcred.p_rgid);
process_info.SetEffectiveUserID (kinfo.kp_eproc.e_ucred.cr_uid);
if (kinfo.kp_eproc.e_ucred.cr_ngroups > 0)
process_info.SetEffectiveGroupID (kinfo.kp_eproc.e_ucred.cr_groups[0]);
else
process_info.SetEffectiveGroupID (UINT32_MAX);
// Make sure our info matches before we go fetch the name and cpu type
if (match_info.Matches (process_info))
{
if (GetMacOSXProcessArgs (&match_info, process_info))
{
GetMacOSXProcessCPUType (process_info);
if (match_info.Matches (process_info))
process_infos.Append (process_info);
}
}
}
return process_infos.GetSize();
}
bool
Host::GetProcessInfo (lldb::pid_t pid, ProcessInstanceInfo &process_info)
{
process_info.SetProcessID(pid);
bool success = false;
if (GetMacOSXProcessArgs (NULL, process_info))
success = true;
if (GetMacOSXProcessCPUType (process_info))
success = true;
if (GetMacOSXProcessUserAndGroup (process_info))
success = true;
if (success)
return true;
process_info.Clear();
return false;
}
static short
GetPosixspawnFlags (ProcessLaunchInfo &launch_info)
{
short flags = POSIX_SPAWN_SETSIGDEF | POSIX_SPAWN_SETSIGMASK;
if (launch_info.GetFlags().Test (eLaunchFlagExec))
flags |= POSIX_SPAWN_SETEXEC; // Darwin specific posix_spawn flag
if (launch_info.GetFlags().Test (eLaunchFlagDebug))
flags |= POSIX_SPAWN_START_SUSPENDED; // Darwin specific posix_spawn flag
if (launch_info.GetFlags().Test (eLaunchFlagDisableASLR))
flags |= _POSIX_SPAWN_DISABLE_ASLR; // Darwin specific posix_spawn flag
if (launch_info.GetLaunchInSeparateProcessGroup())
flags |= POSIX_SPAWN_SETPGROUP;
//#ifdef POSIX_SPAWN_CLOEXEC_DEFAULT
// // Close all files exception those with file actions if this is supported.
// flags |= POSIX_SPAWN_CLOEXEC_DEFAULT;
//#endif
return flags;
}
#if !NO_XPC_SERVICES
static void
PackageXPCArguments (xpc_object_t message, const char *prefix, const Args& args)
{
size_t count = args.GetArgumentCount();
char buf[50]; // long enough for 'argXXX'
memset(buf, 0, 50);
sprintf(buf, "%sCount", prefix);
xpc_dictionary_set_int64(message, buf, count);
for (int i=0; i<count; i++) {
memset(buf, 0, 50);
sprintf(buf, "%s%i", prefix, i);
xpc_dictionary_set_string(message, buf, args.GetArgumentAtIndex(i));
}
}
/*
A valid authorizationRef means that
- there is the LaunchUsingXPCRightName rights in the /etc/authorization
- we have successfully copied the rights to be send over the XPC wire
Once obtained, it will be valid for as long as the process lives.
*/
static AuthorizationRef authorizationRef = NULL;
static Error
getXPCAuthorization (ProcessLaunchInfo &launch_info)
{
Error error;
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_HOST | LIBLLDB_LOG_PROCESS));
if ((launch_info.GetUserID() == 0) && !authorizationRef)
{
OSStatus createStatus = AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &authorizationRef);
if (createStatus != errAuthorizationSuccess)
{
error.SetError(1, eErrorTypeGeneric);
error.SetErrorString("Can't create authorizationRef.");
if (log)
{
error.PutToLog(log.get(), "%s", error.AsCString());
}
return error;
}
OSStatus rightsStatus = AuthorizationRightGet(LaunchUsingXPCRightName, NULL);
if (rightsStatus != errAuthorizationSuccess)
{
// No rights in the security database, Create it with the right prompt.
CFStringRef prompt = CFSTR("Xcode is trying to take control of a root process.");
CFStringRef keys[] = { CFSTR("en") };
CFTypeRef values[] = { prompt };
CFDictionaryRef promptDict = CFDictionaryCreate(kCFAllocatorDefault, (const void **)keys, (const void **)values, 1, &kCFCopyStringDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFStringRef keys1[] = { CFSTR("class"), CFSTR("group"), CFSTR("comment"), CFSTR("default-prompt"), CFSTR("shared") };
CFTypeRef values1[] = { CFSTR("user"), CFSTR("admin"), CFSTR(LaunchUsingXPCRightName), promptDict, kCFBooleanFalse };
CFDictionaryRef dict = CFDictionaryCreate(kCFAllocatorDefault, (const void **)keys1, (const void **)values1, 5, &kCFCopyStringDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
rightsStatus = AuthorizationRightSet(authorizationRef, LaunchUsingXPCRightName, dict, NULL, NULL, NULL);
CFRelease(promptDict);
CFRelease(dict);
}
OSStatus copyRightStatus = errAuthorizationDenied;
if (rightsStatus == errAuthorizationSuccess)
{
AuthorizationItem item1 = { LaunchUsingXPCRightName, 0, NULL, 0 };
AuthorizationItem items[] = {item1};
AuthorizationRights requestedRights = {1, items };
AuthorizationFlags authorizationFlags = kAuthorizationFlagInteractionAllowed | kAuthorizationFlagExtendRights;
copyRightStatus = AuthorizationCopyRights(authorizationRef, &requestedRights, kAuthorizationEmptyEnvironment, authorizationFlags, NULL);
}
if (copyRightStatus != errAuthorizationSuccess)
{
// Eventually when the commandline supports running as root and the user is not
// logged in in the current audit session, we will need the trick in gdb where
// we ask the user to type in the root passwd in the terminal.
error.SetError(2, eErrorTypeGeneric);
error.SetErrorStringWithFormat("Launching as root needs root authorization.");
if (log)
{
error.PutToLog(log.get(), "%s", error.AsCString());
}
if (authorizationRef)
{
AuthorizationFree(authorizationRef, kAuthorizationFlagDefaults);
authorizationRef = NULL;
}
}
}
return error;
}
#endif
static Error
LaunchProcessXPC (const char *exe_path, ProcessLaunchInfo &launch_info, ::pid_t &pid)
{
#if !NO_XPC_SERVICES
Error error = getXPCAuthorization(launch_info);
if (error.Fail())
return error;
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_HOST | LIBLLDB_LOG_PROCESS));
uid_t requested_uid = launch_info.GetUserID();
const char *xpc_service = nil;
bool send_auth = false;
AuthorizationExternalForm extForm;
if ((requested_uid == UINT32_MAX) || (requested_uid == Host::GetEffectiveUserID()))
{
xpc_service = "com.apple.lldb.launcherXPCService";
}
else if (requested_uid == 0)
{
if (AuthorizationMakeExternalForm(authorizationRef, &extForm) == errAuthorizationSuccess)
{
send_auth = true;
}
else
{
error.SetError(3, eErrorTypeGeneric);
error.SetErrorStringWithFormat("Launching root via XPC needs to externalize authorization reference.");
if (log)
{
error.PutToLog(log.get(), "%s", error.AsCString());
}
return error;
}
xpc_service = "com.apple.lldb.launcherRootXPCService";
}
else
{
error.SetError(4, eErrorTypeGeneric);
error.SetErrorStringWithFormat("Launching via XPC is only currently available for either the login user or root.");
if (log)
{
error.PutToLog(log.get(), "%s", error.AsCString());
}
return error;
}
xpc_connection_t conn = xpc_connection_create(xpc_service, NULL);
xpc_connection_set_event_handler(conn, ^(xpc_object_t event) {
xpc_type_t type = xpc_get_type(event);
if (type == XPC_TYPE_ERROR) {
if (event == XPC_ERROR_CONNECTION_INTERRUPTED) {
// The service has either canceled itself, crashed, or been terminated.
// The XPC connection is still valid and sending a message to it will re-launch the service.
// If the service is state-full, this is the time to initialize the new service.
return;
} else if (event == XPC_ERROR_CONNECTION_INVALID) {
// The service is invalid. Either the service name supplied to xpc_connection_create() is incorrect
// or we (this process) have canceled the service; we can do any cleanup of appliation state at this point.
// printf("Service disconnected");
return;
} else {
// printf("Unexpected error from service: %s", xpc_dictionary_get_string(event, XPC_ERROR_KEY_DESCRIPTION));
}
} else {
// printf("Received unexpected event in handler");
}
});
xpc_connection_set_finalizer_f (conn, xpc_finalizer_t(xpc_release));
xpc_connection_resume (conn);
xpc_object_t message = xpc_dictionary_create (nil, nil, 0);
if (send_auth)
{
xpc_dictionary_set_data(message, LauncherXPCServiceAuthKey, extForm.bytes, sizeof(AuthorizationExternalForm));
}
PackageXPCArguments(message, LauncherXPCServiceArgPrefxKey, launch_info.GetArguments());
PackageXPCArguments(message, LauncherXPCServiceEnvPrefxKey, launch_info.GetEnvironmentEntries());
// Posix spawn stuff.
xpc_dictionary_set_int64(message, LauncherXPCServiceCPUTypeKey, launch_info.GetArchitecture().GetMachOCPUType());
xpc_dictionary_set_int64(message, LauncherXPCServicePosixspawnFlagsKey, GetPosixspawnFlags(launch_info));
xpc_object_t reply = xpc_connection_send_message_with_reply_sync(conn, message);
xpc_type_t returnType = xpc_get_type(reply);
if (returnType == XPC_TYPE_DICTIONARY)
{
pid = xpc_dictionary_get_int64(reply, LauncherXPCServiceChildPIDKey);
if (pid == 0)
{
int errorType = xpc_dictionary_get_int64(reply, LauncherXPCServiceErrorTypeKey);
int errorCode = xpc_dictionary_get_int64(reply, LauncherXPCServiceCodeTypeKey);
error.SetError(errorCode, eErrorTypeGeneric);
error.SetErrorStringWithFormat("Problems with launching via XPC. Error type : %i, code : %i", errorType, errorCode);
if (log)
{
error.PutToLog(log.get(), "%s", error.AsCString());
}
if (authorizationRef)
{
AuthorizationFree(authorizationRef, kAuthorizationFlagDefaults);
authorizationRef = NULL;
}
}
}
else if (returnType == XPC_TYPE_ERROR)
{
error.SetError(5, eErrorTypeGeneric);
error.SetErrorStringWithFormat("Problems with launching via XPC. XPC error : %s", xpc_dictionary_get_string(reply, XPC_ERROR_KEY_DESCRIPTION));
if (log)
{
error.PutToLog(log.get(), "%s", error.AsCString());
}
}
return error;
#else
Error error;
return error;
#endif
}
static Error
LaunchProcessPosixSpawn (const char *exe_path, ProcessLaunchInfo &launch_info, ::pid_t &pid)
{
Error error;
LogSP log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_HOST | LIBLLDB_LOG_PROCESS));
posix_spawnattr_t attr;
error.SetError( ::posix_spawnattr_init (&attr), eErrorTypePOSIX);
if (error.Fail() || log)
error.PutToLog(log.get(), "::posix_spawnattr_init ( &attr )");
if (error.Fail())
return error;
// Make a quick class that will cleanup the posix spawn attributes in case
// we return in the middle of this function.
lldb_utility::CleanUp <posix_spawnattr_t *, int> posix_spawnattr_cleanup(&attr, posix_spawnattr_destroy);
sigset_t no_signals;
sigset_t all_signals;
sigemptyset (&no_signals);
sigfillset (&all_signals);
::posix_spawnattr_setsigmask(&attr, &no_signals);
::posix_spawnattr_setsigdefault(&attr, &all_signals);
short flags = GetPosixspawnFlags(launch_info);
error.SetError( ::posix_spawnattr_setflags (&attr, flags), eErrorTypePOSIX);
if (error.Fail() || log)
error.PutToLog(log.get(), "::posix_spawnattr_setflags ( &attr, flags=0x%8.8x )", flags);
if (error.Fail())
return error;
#if !defined(__arm__)
// We don't need to do this for ARM, and we really shouldn't now that we
// have multiple CPU subtypes and no posix_spawnattr call that allows us
// to set which CPU subtype to launch...
const ArchSpec &arch_spec = launch_info.GetArchitecture();
cpu_type_t cpu = arch_spec.GetMachOCPUType();
if (cpu != 0 &&
cpu != UINT32_MAX &&
cpu != LLDB_INVALID_CPUTYPE)
{
size_t ocount = 0;
error.SetError( ::posix_spawnattr_setbinpref_np (&attr, 1, &cpu, &ocount), eErrorTypePOSIX);
if (error.Fail() || log)
error.PutToLog(log.get(), "::posix_spawnattr_setbinpref_np ( &attr, 1, cpu_type = 0x%8.8x, count => %llu )", cpu, (uint64_t)ocount);
if (error.Fail() || ocount != 1)
return error;
}
#endif
const char *tmp_argv[2];
char * const *argv = (char * const*)launch_info.GetArguments().GetConstArgumentVector();
char * const *envp = (char * const*)launch_info.GetEnvironmentEntries().GetConstArgumentVector();
if (argv == NULL)
{
// posix_spawn gets very unhappy if it doesn't have at least the program
// name in argv[0]. One of the side affects I have noticed is the environment
// variables don't make it into the child process if "argv == NULL"!!!
tmp_argv[0] = exe_path;
tmp_argv[1] = NULL;
argv = (char * const*)tmp_argv;
}
const char *working_dir = launch_info.GetWorkingDirectory();
if (working_dir)
{
// No more thread specific current working directory
if (__pthread_chdir (working_dir) < 0) {
if (errno == ENOENT) {
error.SetErrorStringWithFormat("No such file or directory: %s", working_dir);
} else if (errno == ENOTDIR) {
error.SetErrorStringWithFormat("Path doesn't name a directory: %s", working_dir);
} else {
error.SetErrorStringWithFormat("An unknown error occurred when changing directory for process execution.");
}
return error;
}
}
const size_t num_file_actions = launch_info.GetNumFileActions ();
if (num_file_actions > 0)
{
posix_spawn_file_actions_t file_actions;
error.SetError( ::posix_spawn_file_actions_init (&file_actions), eErrorTypePOSIX);
if (error.Fail() || log)
error.PutToLog(log.get(), "::posix_spawn_file_actions_init ( &file_actions )");
if (error.Fail())
return error;
// Make a quick class that will cleanup the posix spawn attributes in case
// we return in the middle of this function.
lldb_utility::CleanUp <posix_spawn_file_actions_t *, int> posix_spawn_file_actions_cleanup (&file_actions, posix_spawn_file_actions_destroy);
for (size_t i=0; i<num_file_actions; ++i)
{
const ProcessLaunchInfo::FileAction *launch_file_action = launch_info.GetFileActionAtIndex(i);
if (launch_file_action)
{
if (!ProcessLaunchInfo::FileAction::AddPosixSpawnFileAction (&file_actions,
launch_file_action,
log.get(),
error))
return error;
}
}
error.SetError (::posix_spawnp (&pid,
exe_path,
&file_actions,
&attr,
argv,
envp),
eErrorTypePOSIX);
if (error.Fail() || log)
{
error.PutToLog(log.get(), "::posix_spawnp ( pid => %i, path = '%s', file_actions = %p, attr = %p, argv = %p, envp = %p )",
pid,
exe_path,
&file_actions,
&attr,
argv,
envp);
if (log)
{
for (int ii=0; argv[ii]; ++ii)
log->Printf("argv[%i] = '%s'", ii, argv[ii]);
}
}
}
else
{
error.SetError (::posix_spawnp (&pid,
exe_path,
NULL,
&attr,
argv,
envp),
eErrorTypePOSIX);
if (error.Fail() || log)
{
error.PutToLog(log.get(), "::posix_spawnp ( pid => %i, path = '%s', file_actions = NULL, attr = %p, argv = %p, envp = %p )",
pid,
exe_path,
&attr,
argv,
envp);
if (log)
{
for (int ii=0; argv[ii]; ++ii)
log->Printf("argv[%i] = '%s'", ii, argv[ii]);
}
}
}
if (working_dir)
{
// No more thread specific current working directory
__pthread_fchdir (-1);
}
return error;
}
static bool
ShouldLaunchUsingXPC(const char *exe_path, ProcessLaunchInfo &launch_info)
{
bool result = false;
#if !NO_XPC_SERVICES
const char *debugserver = "/debugserver";
int len = strlen(debugserver);
int exe_len = strlen(exe_path);
if (exe_len >= len)
{
const char *part = exe_path + (exe_len - len);
if (strcmp(part, debugserver) == 0)
{
// We are dealing with debugserver.
uid_t requested_uid = launch_info.GetUserID();
if (requested_uid == 0)
{
// Launching XPC works for root. It also works for the non-attaching case for current login
// but unfortunately, we can't detect it here.
result = true;
}
}
}
#endif
return result;
}
Error
Host::LaunchProcess (ProcessLaunchInfo &launch_info)
{
Error error;
char exe_path[PATH_MAX];
PlatformSP host_platform_sp (Platform::GetDefaultPlatform ());
const ArchSpec &arch_spec = launch_info.GetArchitecture();
FileSpec exe_spec(launch_info.GetExecutableFile());
FileSpec::FileType file_type = exe_spec.GetFileType();
if (file_type != FileSpec::eFileTypeRegular)
{
lldb::ModuleSP exe_module_sp;
error = host_platform_sp->ResolveExecutable (exe_spec,
arch_spec,
exe_module_sp,
NULL);
if (error.Fail())
return error;
if (exe_module_sp)
exe_spec = exe_module_sp->GetFileSpec();
}
if (exe_spec.Exists())
{
exe_spec.GetPath (exe_path, sizeof(exe_path));
}
else
{
launch_info.GetExecutableFile().GetPath (exe_path, sizeof(exe_path));
error.SetErrorStringWithFormat ("executable doesn't exist: '%s'", exe_path);
return error;
}
if (launch_info.GetFlags().Test (eLaunchFlagLaunchInTTY))
{
#if !defined(__arm__)
return LaunchInNewTerminalWithAppleScript (exe_path, launch_info);
#else
error.SetErrorString ("launching a processs in a new terminal is not supported on iOS devices");
return error;
#endif
}
::pid_t pid = LLDB_INVALID_PROCESS_ID;
if (ShouldLaunchUsingXPC(exe_path, launch_info))
{
error = LaunchProcessXPC(exe_path, launch_info, pid);
}
else
{
error = LaunchProcessPosixSpawn(exe_path, launch_info, pid);
}
if (pid != LLDB_INVALID_PROCESS_ID)
{
// If all went well, then set the process ID into the launch info
launch_info.SetProcessID(pid);
// Make sure we reap any processes we spawn or we will have zombies.
if (!launch_info.MonitorProcess())
{
const bool monitor_signals = false;
StartMonitoringChildProcess (Process::SetProcessExitStatus,
NULL,
pid,
monitor_signals);
}
}
else
{
// Invalid process ID, something didn't go well
if (error.Success())
error.SetErrorString ("process launch failed for unknown reasons");
}
return error;
}
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;
unsigned long mask = DISPATCH_PROC_EXIT;
if (monitor_signals)
mask |= DISPATCH_PROC_SIGNAL;
LogSP log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_HOST | LIBLLDB_LOG_PROCESS));
dispatch_source_t source = ::dispatch_source_create (DISPATCH_SOURCE_TYPE_PROC,
pid,
mask,
::dispatch_get_global_queue (DISPATCH_QUEUE_PRIORITY_DEFAULT,0));
if (log)
log->Printf ("Host::StartMonitoringChildProcess (callback=%p, baton=%p, pid=%i, monitor_signals=%i) source = %p\n",
callback,
callback_baton,
(int)pid,
monitor_signals,
source);
if (source)
{
::dispatch_source_set_cancel_handler (source, ^{
::dispatch_release (source);
});
::dispatch_source_set_event_handler (source, ^{
int status= 0;
int wait_pid = 0;
bool cancel = false;
bool exited = false;
do
{
wait_pid = ::waitpid (pid, &status, 0);
} while (wait_pid < 0 && errno == EINTR);
if (wait_pid >= 0)
{
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";
exited = true;
exit_status = -1;
}
else
{
status_cstr = "???";
}
if (log)
log->Printf ("::waitpid (pid = %llu, &status, 0) => pid = %i, status = 0x%8.8x (%s), signal = %i, exit_status = %i",
pid,
wait_pid,
status,
status_cstr,
signal,
exit_status);
if (callback)
cancel = callback (callback_baton, pid, exited, signal, exit_status);
if (exited || cancel)
{
::dispatch_source_cancel(source);
}
}
});
::dispatch_resume (source);
}
return thread;
}
//----------------------------------------------------------------------
// Log to both stderr and to ASL Logging when running on MacOSX.
//----------------------------------------------------------------------
void
Host::SystemLog (SystemLogType type, const char *format, va_list args)
{
if (format && format[0])
{
static aslmsg g_aslmsg = NULL;
if (g_aslmsg == NULL)
{
g_aslmsg = ::asl_new (ASL_TYPE_MSG);
char asl_key_sender[PATH_MAX];
snprintf(asl_key_sender, sizeof(asl_key_sender), "com.apple.LLDB.framework");
::asl_set (g_aslmsg, ASL_KEY_SENDER, asl_key_sender);
}
// Copy the va_list so we can log this message twice
va_list copy_args;
va_copy (copy_args, args);
// Log to stderr
::vfprintf (stderr, format, copy_args);
va_end (copy_args);
int asl_level;
switch (type)
{
case eSystemLogError:
asl_level = ASL_LEVEL_ERR;
break;
case eSystemLogWarning:
asl_level = ASL_LEVEL_WARNING;
break;
}
// Log to ASL
::asl_vlog (NULL, g_aslmsg, asl_level, format, args);
}
}
lldb::DataBufferSP
Host::GetAuxvData(lldb_private::Process *process)
{
return lldb::DataBufferSP();
}
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