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Diffstat (limited to 'winsup/testsuite/cygload/cygload.cc')
| -rw-r--r-- | winsup/testsuite/cygload/cygload.cc | 618 |
1 files changed, 0 insertions, 618 deletions
diff --git a/winsup/testsuite/cygload/cygload.cc b/winsup/testsuite/cygload/cygload.cc deleted file mode 100644 index 0febf326e..000000000 --- a/winsup/testsuite/cygload/cygload.cc +++ /dev/null @@ -1,618 +0,0 @@ -// cygload.cpp -// -// Copyright 2005, Red Hat, Inc. -// -// Written by Max Kaehn <slothman@electric-cloud.com> -// -// This software is a copyrighted work licensed under the terms of the -// Cygwin license. Please consult the file "CYGWIN_LICENSE" for details. -// -// Note that dynamically linking to cygwin1.dll automatically places your code -// under the GPL unless you purchase a Cygwin Contract with Red Hat, Inc. -// See http://www.redhat.com/software/cygwin/ for more information. - - -// Options for this program: -// -v Verbose output. Normal operation is entirely silent, -// save for errors. -// -testinterrupts Pauses the program for 30 seconds so you can demonstrate -// that it handles ^C properly. -// -cygwin Name of DLL to load. Defaults to "cygwin1.dll". - -#include "cygload.h" -#include <iostream> -#include <sstream> -#include <vector> -#include <errno.h> // for ENOENT -#include <sys/types.h> -#include <sys/stat.h> - -using std::cout; -using std::cerr; -using std::endl; -using std::string; - -cygwin::padding *cygwin::padding::_main = NULL; -DWORD cygwin::padding::_mainTID = 0; - -// A few cygwin constants. -static const int SIGHUP = 1; -static const int SIGINT = 2; -static const int SIGTERM = 15; // Cygwin won't deliver this one to us; - // expect unadorned "kill" to just kill - // your process. -static const int SIGSTOP = 17; // Cygwin insists on delivering SIGSTOP to - // the main thread. If your main thread - // is not interruptible, you'll miss the - // signal and ignore the request to suspend. -static const int SIGTSTP = 18; // ^Z on a tty. -static const int SIGCONT = 19; // Resume a stopped process. -static const int SIGUSR1 = 30; -static const int SIGUSR2 = 31; - -// Using *out instead of cout. In verbose mode, out == &cout. -static std::ostream *out = NULL; - -cygwin::padding::padding () -{ - _main = this; - _mainTID = GetCurrentThreadId (); - - _end = _padding + sizeof (_padding); - char *stackbase; -#ifdef __GNUC__ - __asm__ ( - "movl %%fs:4, %0" - :"=r"(stackbase) - ); -#else - __asm - { - mov eax, fs:[4]; - mov stackbase, eax; - } -#endif - _stackbase = stackbase; - - // We've gotten as close as we can to the top of the stack. Even - // subverting the entry point, though, still doesn't get us there-- I'm - // getting 64 bytes in use before the entry point. So we back up the data - // there and restore it when the destructor is called: - if ((_stackbase - _end) != 0) - { - size_t delta = (_stackbase - _end); - - _backup.resize (delta); - - memcpy (&(_backup[0]), _end, delta); - } -} - -cygwin::padding::~padding () -{ - _main = NULL; - - if (_backup.size ()) - { - memcpy (_end, &(_backup[0]), _backup.size ()); - } -} - -void -cygwin::padding::check () -{ - if (_main == NULL) - throw std::runtime_error ("No padding declared!"); - if (_mainTID != GetCurrentThreadId ()) - throw std::runtime_error ("You need to initialize cygwin::connector " - "in the same thread in which you declared the " - "padding."); - - if (_main->_backup.size ()) - *out << "Warning! Stack base is " - << static_cast<void *>(_main->_stackbase) - << ". padding ends at " << static_cast<void *>(_main->_end) - << ". Delta is " << (_main->_stackbase - _main->_end) - << ". Stack variables could be overwritten!" << endl; -} - -cygwin::connector::connector (const char *dll) -{ - // This will throw if padding is not in place. - padding::check (); - - *out << "Loading " << dll << "..." << endl; - - // This should call init.cc:dll_entry() with DLL_PROCESS_ATTACH, - // which calls dll_crt0_0(). - if ((_library = LoadLibrary (dll)) == NULL) - throw windows_error ("LoadLibrary", dll); - - *out << "Initializing cygwin..." << endl; - - // This calls dcrt0.cc:cygwin_dll_init(), which calls dll_crt0_1(), - // which will, among other things: - // * spawn the cygwin signal handling thread from sigproc_init() - // * initialize the thread-local storage for this thread and overwrite - // the first 4K of the stack - void (*cyginit) (); - get_symbol ("cygwin_dll_init", cyginit); - (*cyginit) (); - - *out << "Loading symbols..." << endl; - - // Pick up the function pointers for the basic infrastructure. - get_symbol ("__errno", _errno); - get_symbol ("strerror", _strerror); - get_symbol ("cygwin_conv_to_full_posix_path", _conv_to_full_posix_path); - get_symbol ("cygwin_conv_to_full_win32_path", _conv_to_full_win32_path); - - // Note that you need to be running an interruptible cygwin function if - // you want to receive signals. You can use the standard signal() - // mechanism if you're willing to have your main thread spend all its time - // in interruptible cygwin functions like sleep(). Christopher Faylor - // cautions that this solution "could be slightly racy": if a second - // signal comes in before the first one is done processing, the thread - // won't be back in sigwait() to catch it. - *out << "Spawning signal handling thread..." << endl; - - _waiting_for_signals = true; - _signal_thread_done = false; - InitializeCriticalSection (&_thread_mutex); - - DWORD tid; - - _signal_thread = CreateThread (NULL, // Default security. - 32768, // Adjust the stack size as - // appropriate for what your signal - // handler needs in order to run, and - // then add 4K for cygtls. - &signal_thread, // Function to call - this, // Context - 0, // Flags - &tid); // Thread ID - - if (_signal_thread == NULL) - throw windows_error ("CreateThread", "signal_thread"); -} - -cygwin::connector::~connector () -{ - try - { - // First, shut down signal handling. - int (*raze) (int); - int (*pthread_join) (void *, void **); - - get_symbol ("raise", raze); - get_symbol ("pthread_join", pthread_join); - - // Tell the listener to shut down... - _waiting_for_signals = false; - int err = 0; - EnterCriticalSection (&_thread_mutex); - if (!_signal_thread_done) - err = raze (SIGUSR2); - LeaveCriticalSection (&_thread_mutex); - if (err) - cerr << error (this, "raise", "SIGUSR2").what () << endl; - // ...and get the thread to join. - if (!CloseHandle (_signal_thread)) - throw windows_error ("CloseHandle", "signal_thread"); - - // This should call init.cc:dll_entry() with DLL_PROCESS_DETACH. - if (!FreeLibrary (_library)) - throw windows_error ("FreeLibrary", "cygwin1.dll"); - } - catch (std::exception &x) - { - cerr << x.what () << endl; - } -} - -DWORD WINAPI -cygwin::connector::signal_thread (void *param) -{ - connector *that = reinterpret_cast < connector * > (param); - - try - { - that->await_signal (); - } - catch (std::exception &x) - { - cerr << "signal_thread caught " << x.what () << endl; - return 0; - } - return 0; -} - -void -cygwin::connector::await_signal () -{ - // Wait for signals. - unsigned long sigset[32]; - int sig; - int (*empty) (void *); - int (*add) (void *, int); - int (*wait) (void *, int *); - - get_symbol ("sigemptyset", empty); - get_symbol ("sigaddset", add); - get_symbol ("sigwait", wait); - - empty (sigset); - add (sigset, SIGHUP); - add (sigset, SIGINT); -// add (sigset, SIGSTOP); -// add (sigset, SIGTSTP); // I can't get this to suspend properly, so - // I'll leave it up to chance that the main - // thread is interruptible. - add (sigset, SIGUSR1); - add (sigset, SIGUSR2); - - while (_waiting_for_signals) - { - int err = wait (sigset, &sig); - if (err) - cerr << error (this, "sigwait").what () << endl; - else - *out << "Received signal " << sig << "." << endl; - switch (sig) - { - case SIGUSR2: - if (!_waiting_for_signals) - { - // SIGUSR2 is how ~connector wakes this thread - goto done; - } - break; - default: - break; - } - handle_signals (sig); - } -done: - EnterCriticalSection (&_thread_mutex); - _signal_thread_done = true; - LeaveCriticalSection (&_thread_mutex); - - *out << "await_signal done." << endl; -} - -cygwin::connector::signal_handler * -cygwin::connector::set_handler (int signal, signal_handler *handler) -{ - signal_handler *retval = _signal_handlers[signal]; - - if (handler == NULL) - _signal_handlers.erase (signal); - else - _signal_handlers[signal] = handler; - - return retval; -} - -void -cygwin::connector::handle_signals (int sig) -{ - callback_list::iterator h = _signal_handlers.find (sig); - - if (h != _signal_handlers.end ()) - { - try - { - signal_handler *handler = h->second; - (*handler) (sig); - return; - } - catch (std::exception &x) - { - cerr << "cygwin::connector::handle_signals caught " - << x.what () << "!" << endl; - return; - } - } - - cerr << "No handler for signal " << sig << "!" << endl; -} - -int -cygwin::connector::err_no () const -{ - int *e = (*_errno) (); - if (e == NULL) - { - return -1; - } - return *e; -} - -string -cygwin::connector::str_error (int err_no) const -{ - string retval; - - const char *s = (*_strerror) (err_no); - if (s != NULL) - { - retval = s; - } - else - { - std::ostringstream o; - o << "Unexpected errno " << err_no; - retval = o.str (); - } - - return retval; -} - -string -cygwin::connector::unix_path (const string &windows) const -{ - char buf[MAX_PATH]; - - _conv_to_full_posix_path (windows.c_str (), buf); - - return string (buf); -} - -string -cygwin::connector::win_path (const string &unix) const -{ - char buf[MAX_PATH]; - - _conv_to_full_win32_path (unix.c_str (), buf); - - return string (buf); -} - -/////////////////////////////////////////////////////////////////////////////// -/////////////////////////////////////////////////////////////////////////////// - -string -cygwin::error::format (cygwin::connector *c, - int err_no, const char *message, const char *detail) -{ - std::ostringstream ret; - - ret << message; - if (detail) - { - ret << "(" << detail << ")"; - } - ret << ": " << c->str_error (err_no); - - return ret.str (); -} - -string -windows_error::format (DWORD error, const char *message, const char *detail) -{ - std::ostringstream ret; - char buf[512]; - DWORD bytes; - - ret << message; - if (detail) - ret << "(" << detail << ")"; - ret << ": "; - - bytes = FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, 0, error, - MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT), - buf, sizeof (buf), 0); - - if (bytes == 0) - ret << "Unexpected Windows error " << error; - else - { - // Remove trailing whitespace - char *p = buf + bytes - 1; - while (isspace (*p)) - *p-- = '\0'; - ret << buf << " (" << error << ")"; - } - - return ret.str (); -} - -/////////////////////////////////////////////////////////////////////////////// -/////////////////////////////////////////////////////////////////////////////// - -extern "C" int mainCRTStartup (); - -// This just pushes 4K onto the stack, backs up the original stack, and -// jumps into the regular startup code. This avoids having to worry about -// backing up argc and argv. -extern "C" int __stdcall -cygloadCRTStartup () -{ - cygwin::padding padding; - return mainCRTStartup (); -} - -/////////////////////////////////////////////////////////////////////////////// -/////////////////////////////////////////////////////////////////////////////// - -static void -hangup (int sig) -{ - cout << "Hangup (" << sig << ")." << endl; -} - -static void -interrupt (int sig) -{ - cerr << "Interrupt (" << sig << ")!" << endl; - exit (0); -} - -static int caught = false; - -static void -catch_signal (int) -{ - *out << "Signals are working." << endl; - caught = true; -} - -int -main (int argc, char *argv[]) -{ - // If you do not want to use cygloadCRTStartup() as an entry point, - // uncomment this line, but be sure to have *everything* you want - // from the stack below it backed up before you call the - // constructor for cygwin::connector. - //cygwin::padding padding; - - std::ostringstream output; - bool verbose = false, testinterrupts = false; - const char *dll = "cygwin1.dll"; - - out = &output; - - for (int i = 1; i < argc; ++i) - { - string arg = string (argv[i]); - - if (arg == "-v") - { - verbose = true; - out = &cout; - } - else if (arg == "-testinterrupts") - testinterrupts = true; - else if (arg == "-cygwin") - { - if (i+1 >= argc) - { - cerr << "Need to supply an argument with -cygwin." << endl; - return 255; - } - dll = argv[++i]; - } - } - - - try - { - *out << "Connecting to cygwin..." << endl; - cygwin::connector cygwin (dll); - *out << "Successfully connected." << endl; - - string result = cygwin.str_error (ENOENT); - - if (result != "No such file or directory") - { - cerr << "strerror(ENOENT) returned \"" - << result - << "\" instead of \"No such file or directory\"!" - << endl; - return 1; - } - else if (verbose) - { - *out << "strerror(ENOENT) = " << result << endl; - } - - // Path conversion: from cygwin to Windows... - result = cygwin.win_path ("/usr"); - struct _stat statbuf; - if (::_stat (result.c_str (), &statbuf) < 0) - { - cerr << "stat(\"" << result << "\") failed!" << endl; - return 2; - } - else if (verbose) - { - *out << "/usr == " << result << endl; - } - - // ...and back: - char buf[MAX_PATH], scratch[256]; - GetSystemDirectory (buf, sizeof(buf)); - int (*cygstat) (const char *, void *); - cygwin.get_symbol ("stat", cygstat); - - if (cygstat (buf, scratch) < 0) - { - cerr << "cygwin stat(\"" << buf << "\") failed!" << endl; - return 3; - } - else if (verbose) - { - *out << buf << " == " << cygwin.unix_path(buf) << endl; - } - - // Test error handling. This should output - // "open(/potrzebie/furshlugginer): No such file or directory" - { - int (*cygopen) (const char *, int); - cygwin.get_symbol ("open", cygopen); - - if (cygopen ("/potrzebie/furshlugginer", 0 /* O_RDONLY */ ) < 0) - { - int err = cygwin.err_no (); - if (err != ENOENT) - { - cerr << "cygwin open(\"/potrzebie/furshlugginer\", " - "O_RDONLY): expected to fail with ENOENT, got " - << err << "!" << endl; - return 4; - } - if (verbose) - *out << cygwin::error (&cygwin, "open", - "/potrzebie/furshlugginer").what () - << endl; - } - else - { - cerr << "/potrzebie/furshlugginer should not exist!" - << endl; - return 5; - } - } - - // And signal handling: - std::pointer_to_unary_function < int , void > h1 (&hangup); - std::pointer_to_unary_function < int , void > h2 (&interrupt); - std::pointer_to_unary_function < int , void > h3 (&catch_signal); - cygwin.set_handler (SIGHUP, &h1); - cygwin.set_handler (SIGINT, &h2); - cygwin.set_handler (SIGUSR1, &h3); - - // Make sure the signal handler thread has had time to start... - Sleep (100); - // Send a test signal to set "caught" to true... - int (*raze) (int); - cygwin.get_symbol ("raise", raze); - raze (SIGUSR1); - // And give the thread time to wait for the shutdown signal. - Sleep (100); - - if (testinterrupts) - { - // This is a worst case scenario for testing interrupts: the - // main thread is in a long-duration Windows API call. This - // makes the main thread uninterruptible; cygwin will retry - // 20 times, with a low_priority_sleep(0) between each try. - cout << "Sleeping for 30 seconds, waiting for a signal..." << endl; - Sleep (30000); - cout << "Done waiting." << endl; - } - } - catch (std::exception &x) - { - cerr << x.what () << endl; - return 2; - } - - if (caught) - return 0; - else - { - cerr << "Never received SIGUSR1." << endl; - return 1; - } -} |