Solve a corner case of dealloc hooking on JS derived class objects using MobileSubstrate.

[cycript.git] / Application.mm

diff --git a/Application.mm b/Application.mm
index 7b5802378548845a1e6d915c706b91ac8bbd2251..e910f66f6e221beea067f8d1722a6eec1fa434ce 100644 (file)
--- a/Application.mm
+++ b/Application.mm
@@ -1,3 +1,42 @@
+/* Cycript - Remove Execution Server and Disassembler
+ * Copyright (C) 2009  Jay Freeman (saurik)
+*/
+
+/* Modified BSD License {{{ */
+/*
+ *        Redistribution and use in source and binary
+ * forms, with or without modification, are permitted
+ * provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the
+ *    above copyright notice, this list of conditions
+ *    and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the
+ *    above copyright notice, this list of conditions
+ *    and the following disclaimer in the documentation
+ *    and/or other materials provided with the
+ *    distribution.
+ * 3. The name of the author may not be used to endorse
+ *    or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
+ * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+/* }}} */
+
 #define _GNU_SOURCE
 
 #include <substrate.h>
@@ -11,15 +50,58 @@
 #include <readline/readline.h>
 #include <readline/history.h>
 
+#include <sys/mman.h>
+
+#include <errno.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
 #include "Cycript.tab.hh"
 
 static jmp_buf ctrlc_;
 
-void sigint(int) {
+static void sigint(int) {
     longjmp(ctrlc_, 1);
 }
 
-int main(int argc, const char *argv[]) {
+static JSStringRef Result_;
+
+void Run(const char *code, FILE *fout) { _pooled
+    JSStringRef script(JSStringCreateWithUTF8CString(code));
+
+    JSContextRef context(CYGetJSContext());
+
+    JSValueRef exception(NULL);
+    JSValueRef result(JSEvaluateScript(context, script, NULL, NULL, 0, &exception));
+    JSStringRelease(script);
+
+    if (exception != NULL) { error:
+        result = exception;
+        exception = NULL;
+    }
+
+    if (!JSValueIsUndefined(context, result)) {
+        CYPool pool;
+        const char *json;
+
+        json = CYPoolCYONString(pool, context, result, &exception);
+        if (exception != NULL)
+            goto error;
+
+        CYSetProperty(context, CYGetGlobalObject(context), Result_, result);
+
+        if (fout != NULL) {
+            fputs(json, fout);
+            fputs("\n", fout);
+            fflush(fout);
+        }
+    }
+}
+
+static void Console() {
     bool bypass(false);
     bool debug(false);
 
@@ -114,40 +196,75 @@ int main(int argc, const char *argv[]) {
         if (debug)
             std::cout << code << std::endl;
 
-        _pooled
+        Run(code.c_str(), fout);
+    }
 
-        JSStringRef script(JSStringCreateWithUTF8CString(code.c_str()));
+    fputs("\n", fout);
+    fflush(fout);
+}
 
-        JSContextRef context(CYGetJSContext());
+static void *Map(const char *path, size_t *psize) {
+    int fd;
+    _syscall(fd = open(path, O_RDONLY));
 
-        JSValueRef exception(NULL);
-        JSValueRef result(JSEvaluateScript(context, script, NULL, NULL, 0, &exception));
-        JSStringRelease(script);
+    struct stat stat;
+    _syscall(fstat(fd, &stat));
+    size_t size(stat.st_size);
 
-        if (exception != NULL)
-            result = exception;
+    *psize = size;
 
-        if (JSValueIsUndefined(context, result))
-            goto restart;
+    void *base;
+    _syscall(base = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0));
+
+    _syscall(close(fd));
+    return base;
+}
+
+int main(int argc, const char *argv[]) {
+    const char *script;
+
+    if (argc == 1)
+        script = NULL;
+    else {
+        CYSetArgs(argc - 1, argv + 1);
+        script = argv[1];
+    }
 
-        CFStringRef json;
+    Result_ = CYCopyJSString("_");
 
-        @try { json:
-            json = CYCopyJSONString(context, result);
-        } @catch (id error) {
-            CYThrow(context, error, &result);
-            goto json;
+    if (script == NULL || strcmp(script, "-") == 0)
+        Console();
+    else {
+        CYDriver driver(script);
+        cy::parser parser(driver);
+
+        size_t size;
+        char *start(reinterpret_cast<char *>(Map(script, &size)));
+        char *end(start + size);
+
+        if (size >= 2 && start[0] == '#' && start[1] == '!') {
+            start += 2;
+
+            if (void *line = memchr(start, '\n', end - start))
+                start = reinterpret_cast<char *>(line);
+            else
+                start = end;
         }
 
-        fputs([reinterpret_cast<const NSString *>(json) UTF8String], fout);
-        CFRelease(json);
+        driver.data_ = start;
+        driver.size_ = end - start;
 
-        fputs("\n", fout);
-        fflush(fout);
+        if (parser.parse() != 0 || !driver.errors_.empty()) {
+            for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i)
+                std::cerr << i->location_.begin << ": " << i->message_ << std::endl;
+        } else if (driver.source_ != NULL) {
+            std::ostringstream str;
+            driver.source_->Show(str);
+            std::string code(str.str());
+            std::cout << code << std::endl;
+            Run(code.c_str(), stdout);
+        }
     }
 
-    fputs("\n", fout);
-    fflush(fout);
-
     return 0;
 }