Handler.mm

   1 /* Cycript - Inlining/Optimizing JavaScript Compiler
   2  * Copyright (C) 2009  Jay Freeman (saurik)
   3 */
   4
   5 /* Modified BSD License {{{ */
   6 /*
   7  *        Redistribution and use in source and binary
   8  * forms, with or without modification, are permitted
   9  * provided that the following conditions are met:
  10  *
  11  * 1. Redistributions of source code must retain the
  12  *    above copyright notice, this list of conditions
  13  *    and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the
  15  *    above copyright notice, this list of conditions
  16  *    and the following disclaimer in the documentation
  17  *    and/or other materials provided with the
  18  *    distribution.
  19  * 3. The name of the author may not be used to endorse
  20  *    or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
  24  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
  25  * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  26  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
  28  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  29  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  30  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  32  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  33  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  34  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  35  * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
  36  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  37 */
  38 /* }}} */
  39
  40 #include "cycript.hpp"
  41
  42 #include "Pooling.hpp"
  43 #include "Parser.hpp"
  44
  45 #include "Cycript.tab.hh"
  46
  47 #include <Foundation/Foundation.h>
  48 #include <apr_thread_proc.h>
  49 #include <unistd.h>
  50 #include <sstream>
  51
  52 #include <sys/types.h>
  53 #include <sys/socket.h>
  54 #include <netinet/in.h>
  55 #include <sys/un.h>
  56
  57 struct CYExecute_ {
  58     apr_pool_t *pool_;
  59     const char * volatile data_;
  60 };
  61
  62 // XXX: this is "tre lame"
  63 @interface CYClient_ : NSObject {
  64 }
  65
  66 - (void) execute:(NSValue *)value;
  67
  68 @end
  69
  70 @implementation CYClient_
  71
  72 - (void) execute:(NSValue *)value {
  73     CYExecute_ *execute(reinterpret_cast<CYExecute_ *>([value pointerValue]));
  74     const char *data(execute->data_);
  75     execute->data_ = NULL;
  76     execute->data_ = CYExecute(execute->pool_, data);
  77 }
  78
  79 @end
  80
  81 struct CYClient :
  82     CYData
  83 {
  84     int socket_;
  85     apr_thread_t *thread_;
  86
  87     CYClient(int socket) :
  88         socket_(socket)
  89     {
  90     }
  91
  92     ~CYClient() {
  93         _syscall(close(socket_));
  94     }
  95
  96     void Handle() {
  97         NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
  98
  99         CYClient_ *client = [[[CYClient_ alloc] init] autorelease];
 100
 101         bool dispatch;
 102         if (CFStringRef mode = CFRunLoopCopyCurrentMode(CFRunLoopGetMain())) {
 103             dispatch = true;
 104             CFRelease(mode);
 105         } else
 106             dispatch = false;
 107
 108         for (;;) {
 109             size_t size;
 110             if (!CYRecvAll(socket_, &size, sizeof(size)))
 111                 return;
 112
 113             CYPool pool;
 114             char *data(new(pool) char[size + 1]);
 115             if (!CYRecvAll(socket_, data, size))
 116                 return;
 117             data[size] = '\0';
 118
 119             CYDriver driver("");
 120             cy::parser parser(driver);
 121
 122             driver.data_ = data;
 123             driver.size_ = size;
 124
 125             const char *json;
 126             if (parser.parse() != 0 || !driver.errors_.empty()) {
 127                 json = NULL;
 128                 size = _not(size_t);
 129             } else {
 130                 NSAutoreleasePool *ar = [[NSAutoreleasePool alloc] init];
 131
 132                 CYContext context(driver.pool_);
 133                 driver.program_->Replace(context);
 134                 std::ostringstream str;
 135                 CYOutput out(str);
 136                 out << *driver.program_;
 137                 std::string code(str.str());
 138                 CYExecute_ execute = {pool, code.c_str()};
 139                 NSValue *value([NSValue valueWithPointer:&execute]);
 140                 if (dispatch)
 141                     [client performSelectorOnMainThread:@selector(execute:) withObject:value waitUntilDone:YES];
 142                 else
 143                     [client execute:value];
 144                 json = execute.data_;
 145                 size = json == NULL ? _not(size_t) : strlen(json);
 146
 147                 [ar release];
 148             }
 149
 150             if (!CYSendAll(socket_, &size, sizeof(size)))
 151                 return;
 152             if (json != NULL)
 153                 if (!CYSendAll(socket_, json, size))
 154                     return;
 155         }
 156
 157         [pool release];
 158     }
 159 };
 160
 161 static void * APR_THREAD_FUNC OnClient(apr_thread_t *thread, void *data) {
 162     CYClient *client(reinterpret_cast<CYClient *>(data));
 163     client->Handle();
 164     delete client;
 165     return NULL;
 166 }
 167
 168 extern "C" void CYHandleClient(apr_pool_t *pool, int socket) {
 169     CYClient *client(new(pool) CYClient(socket));
 170     apr_threadattr_t *attr;
 171     _aprcall(apr_threadattr_create(&attr, client->pool_));
 172     _aprcall(apr_thread_create(&client->thread_, attr, &OnClient, client, client->pool_));
 173 }
 174
 175 extern "C" void CYHandleServer(pid_t pid) {
 176     CYInitialize();
 177
 178     int socket(_syscall(::socket(PF_UNIX, SOCK_STREAM, 0))); try {
 179         struct sockaddr_un address;
 180         memset(&address, 0, sizeof(address));
 181         address.sun_family = AF_UNIX;
 182         sprintf(address.sun_path, "/tmp/.s.cy.%u", pid);
 183
 184         _syscall(connect(socket, reinterpret_cast<sockaddr *>(&address), SUN_LEN(&address)));
 185
 186         apr_pool_t *pool;
 187         apr_pool_create(&pool, NULL);
 188
 189         CYHandleClient(pool, socket);
 190     } catch (const CYException &error) {
 191         CYPool pool;
 192         fprintf(stderr, "%s\n", error.PoolCString(pool));
 193     }
 194 }