From: Jay Freeman (saurik) <saurik@saurik.com>
Date: Thu, 8 Oct 2009 20:38:21 +0000 (+0000)
Subject: Drastic modifications to exception handling that required temporarily bringing back... 
X-Git-Tag: v0.9.432~375
X-Git-Url: https://git.saurik.com/cycript.git/commitdiff_plain/4cf49641600bf5204fce42b168b489ea19fc865a

Drastic modifications to exception handling that required temporarily bringing back Objective- for the core Application :(.
---

diff --git a/Application.cpp b/Application.cpp
deleted file mode 100644
index ae638a6..0000000
--- a/Application.cpp
+++ /dev/null
@@ -1,217 +0,0 @@
-#define _GNU_SOURCE
-
-#include <substrate.h>
-#include "cycript.hpp"
-
-#include <cstdio>
-#include <sstream>
-
-#include <setjmp.h>
-
-#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) {
-    longjmp(ctrlc_, 1);
-}
-
-void Run(const char *code, FILE *fout) {
-    JSStringRef script(JSStringCreateWithUTF8CString(code));
-
-    JSContextRef context(CYGetJSContext());
-
-    JSValueRef exception(NULL);
-    JSValueRef result(JSEvaluateScript(context, script, NULL, NULL, 0, &exception));
-    JSStringRelease(script);
-
-    if (exception != NULL)
-        result = exception;
-
-    if (!JSValueIsUndefined(context, result)) {
-        CYPool pool;
-        const char *json;
-
-        json = CYPoolJSONString(pool, context, result);
-
-        if (fout != NULL) {
-            fputs(json, fout);
-            fputs("\n", fout);
-            fflush(fout);
-        }
-    }
-}
-
-void Console() {
-    bool bypass(false);
-    bool debug(false);
-
-    FILE *fout(stdout);
-
-    rl_bind_key('\t', rl_insert);
-
-    struct sigaction action;
-    sigemptyset(&action.sa_mask);
-    action.sa_handler = &sigint;
-    action.sa_flags = 0;
-    sigaction(SIGINT, &action, NULL);
-
-    restart: for (;;) {
-        std::string command;
-        std::vector<std::string> lines;
-
-        bool extra(false);
-        const char *prompt("cy# ");
-
-        if (setjmp(ctrlc_) != 0) {
-            fputs("\n", fout);
-            fflush(fout);
-            goto restart;
-        }
-
-      read:
-        char *line(readline(prompt));
-        if (line == NULL)
-            break;
-
-        if (!extra) {
-            extra = true;
-            if (line[0] == '\\') {
-                std::string data(line + 1);
-                if (data == "bypass") {
-                    bypass = !bypass;
-                    fprintf(fout, "bypass == %s\n", bypass ? "true" : "false");
-                    fflush(fout);
-                } else if (data == "debug") {
-                    debug = !debug;
-                    fprintf(fout, "debug == %s\n", debug ? "true" : "false");
-                    fflush(fout);
-                }
-                add_history(line);
-                goto restart;
-            }
-        }
-
-        lines.push_back(line);
-        command += line;
-        free(line);
-
-        std::string code;
-
-        if (bypass)
-            code = command;
-        else {
-            CYDriver driver("");
-            cy::parser parser(driver);
-
-            driver.data_ = command.c_str();
-            driver.size_ = command.size();
-
-            if (parser.parse() != 0 || !driver.errors_.empty()) {
-                for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i) {
-                    cy::position begin(i->location_.begin);
-                    if (begin.line != lines.size() || begin.column - 1 != lines.back().size()) {
-                        std::cerr << i->message_ << std::endl;
-                        add_history(command.c_str());
-                        goto restart;
-                    }
-                }
-
-                driver.errors_.clear();
-
-                command += '\n';
-                prompt = "cy> ";
-                goto read;
-            }
-
-            if (driver.source_ == NULL)
-                goto restart;
-
-            std::ostringstream str;
-            driver.source_->Show(str);
-            code = str.str();
-        }
-
-        add_history(command.c_str());
-
-        if (debug)
-            std::cout << code << std::endl;
-
-        Run(code.c_str(), fout);
-    }
-
-    fputs("\n", fout);
-    fflush(fout);
-}
-
-void *Map(const char *path, size_t *psize) {
-    int fd;
-    _syscall(fd = open(path, O_RDONLY));
-
-    struct stat stat;
-    _syscall(fstat(fd, &stat));
-    size_t size(stat.st_size);
-
-    *psize = size;
-
-    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];
-    }
-
-    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;
-            while (start != end && *start++ != '\n');
-        }
-
-        driver.data_ = start;
-        driver.size_ = end - start;
-
-        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);
-        }
-    }
-
-    return 0;
-}
diff --git a/Application.mm b/Application.mm
new file mode 100644
index 0000000..31b7a45
--- /dev/null
+++ b/Application.mm
@@ -0,0 +1,221 @@
+#define _GNU_SOURCE
+
+#include <substrate.h>
+#include "cycript.hpp"
+
+#include <cstdio>
+#include <sstream>
+
+#include <setjmp.h>
+
+#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) {
+    longjmp(ctrlc_, 1);
+}
+
+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 = CYPoolJSONString(pool, context, result, &exception);
+        if (exception != NULL)
+            goto error;
+
+        if (fout != NULL) {
+            fputs(json, fout);
+            fputs("\n", fout);
+            fflush(fout);
+        }
+    }
+}
+
+void Console() {
+    bool bypass(false);
+    bool debug(false);
+
+    FILE *fout(stdout);
+
+    rl_bind_key('\t', rl_insert);
+
+    struct sigaction action;
+    sigemptyset(&action.sa_mask);
+    action.sa_handler = &sigint;
+    action.sa_flags = 0;
+    sigaction(SIGINT, &action, NULL);
+
+    restart: for (;;) {
+        std::string command;
+        std::vector<std::string> lines;
+
+        bool extra(false);
+        const char *prompt("cy# ");
+
+        if (setjmp(ctrlc_) != 0) {
+            fputs("\n", fout);
+            fflush(fout);
+            goto restart;
+        }
+
+      read:
+        char *line(readline(prompt));
+        if (line == NULL)
+            break;
+
+        if (!extra) {
+            extra = true;
+            if (line[0] == '\\') {
+                std::string data(line + 1);
+                if (data == "bypass") {
+                    bypass = !bypass;
+                    fprintf(fout, "bypass == %s\n", bypass ? "true" : "false");
+                    fflush(fout);
+                } else if (data == "debug") {
+                    debug = !debug;
+                    fprintf(fout, "debug == %s\n", debug ? "true" : "false");
+                    fflush(fout);
+                }
+                add_history(line);
+                goto restart;
+            }
+        }
+
+        lines.push_back(line);
+        command += line;
+        free(line);
+
+        std::string code;
+
+        if (bypass)
+            code = command;
+        else {
+            CYDriver driver("");
+            cy::parser parser(driver);
+
+            driver.data_ = command.c_str();
+            driver.size_ = command.size();
+
+            if (parser.parse() != 0 || !driver.errors_.empty()) {
+                for (CYDriver::Errors::const_iterator i(driver.errors_.begin()); i != driver.errors_.end(); ++i) {
+                    cy::position begin(i->location_.begin);
+                    if (begin.line != lines.size() || begin.column - 1 != lines.back().size()) {
+                        std::cerr << i->message_ << std::endl;
+                        add_history(command.c_str());
+                        goto restart;
+                    }
+                }
+
+                driver.errors_.clear();
+
+                command += '\n';
+                prompt = "cy> ";
+                goto read;
+            }
+
+            if (driver.source_ == NULL)
+                goto restart;
+
+            std::ostringstream str;
+            driver.source_->Show(str);
+            code = str.str();
+        }
+
+        add_history(command.c_str());
+
+        if (debug)
+            std::cout << code << std::endl;
+
+        Run(code.c_str(), fout);
+    }
+
+    fputs("\n", fout);
+    fflush(fout);
+}
+
+void *Map(const char *path, size_t *psize) {
+    int fd;
+    _syscall(fd = open(path, O_RDONLY));
+
+    struct stat stat;
+    _syscall(fstat(fd, &stat));
+    size_t size(stat.st_size);
+
+    *psize = size;
+
+    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];
+    }
+
+    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;
+            while (start != end && *start++ != '\n');
+        }
+
+        driver.data_ = start;
+        driver.size_ = end - start;
+
+        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);
+        }
+    }
+
+    return 0;
+}
diff --git a/Library.mm b/Library.mm
index 4213e5b..cc57c44 100644
--- a/Library.mm
+++ b/Library.mm
@@ -82,6 +82,22 @@
     CFLog(kCFLogLevelNotice, CFSTR("_trace():%u"), __LINE__); \
 } while (false)
 
+#define CYPoolTry { \
+    id _saved(nil); \
+    NSAutoreleasePool *_pool([[NSAutoreleasePool alloc] init]); \
+    @try
+#define CYPoolCatch(value) \
+    @catch (NSException *error) { \
+        _saved = [error retain]; \
+        @throw; \
+        return value; \
+    } @finally { \
+        [_pool release]; \
+        if (_saved != nil) \
+            [_saved autorelease]; \
+    } \
+}
+
 static JSGlobalContextRef Context_;
 static JSObjectRef System_;
 
@@ -179,7 +195,7 @@ struct jocData : ptrData {
     }
 };
 
-JSObjectRef CYMakeInstance(JSContextRef context, id object, bool transient = true) {
+JSObjectRef CYMakeInstance(JSContextRef context, id object, bool transient) {
     if (!transient)
         object = [object retain];
     jocData *data(new jocData(object, transient));
@@ -229,7 +245,7 @@ JSValueRef CYJSUndefined(JSContextRef context) {
 @interface NSObject (Cycript)
 - (bool) cy$isUndefined;
 - (NSString *) cy$toJSON;
-- (JSValueRef) cy$JSValueInContext:(JSContextRef)context;
+- (JSValueRef) cy$JSValueInContext:(JSContextRef)context transient:(bool)transient;
 @end
 
 @interface NSString (Cycript)
@@ -250,8 +266,8 @@ JSValueRef CYJSUndefined(JSContextRef context) {
     return [self description];
 }
 
-- (JSValueRef) cy$JSValueInContext:(JSContextRef)context {
-    return CYMakeInstance(context, self);
+- (JSValueRef) cy$JSValueInContext:(JSContextRef)context transient:(bool)transient {
+    return CYMakeInstance(context, self, transient);
 }
 
 @end
@@ -266,7 +282,7 @@ JSValueRef CYJSUndefined(JSContextRef context) {
     return @"undefined";
 }
 
-- (JSValueRef) cy$JSValueInContext:(JSContextRef)context {
+- (JSValueRef) cy$JSValueInContext:(JSContextRef)context transient:(bool)transient {
     return CYJSUndefined(context);
 }
 
@@ -336,7 +352,7 @@ JSValueRef CYJSUndefined(JSContextRef context) {
     return [self class] != NSCFBoolean_ ? [self stringValue] : [self boolValue] ? @"true" : @"false";
 }
 
-- (JSValueRef) cy$JSValueInContext:(JSContextRef)context {
+- (JSValueRef) cy$JSValueInContext:(JSContextRef)context transient:(bool)transient {
     return [self class] != NSCFBoolean_ ? CYCastJSValue(context, [self doubleValue]) : CYCastJSValue(context, [self boolValue]);
 }
 
@@ -404,6 +420,8 @@ JSGlobalContextRef CYGetJSContext() {
     return Context_;
 }
 
+#define CYTry \
+    @try
 #define CYCatch \
     @catch (id error) { \
         NSLog(@"e:%@", error); \
@@ -623,8 +641,8 @@ JSValueRef CYCastJSValue(JSContextRef context, const char *value) {
     return CYCastJSValue(context, CYJSString(value));
 }
 
-JSValueRef CYCastJSValue(JSContextRef context, id value) {
-    return value == nil ? CYJSNull(context) : [value cy$JSValueInContext:context];
+JSValueRef CYCastJSValue(JSContextRef context, id value, bool transient = true) {
+    return value == nil ? CYJSNull(context) : [value cy$JSValueInContext:context transient:transient];
 }
 
 JSObjectRef CYCastJSObject(JSContextRef context, JSValueRef value) {
@@ -648,6 +666,8 @@ void CYSetProperty(JSContextRef context, JSObjectRef object, JSStringRef name, J
 }
 
 void CYThrow(JSContextRef context, id error, JSValueRef *exception) {
+    if (exception == NULL)
+        throw error;
     *exception = CYCastJSValue(context, error);
 }
 
@@ -713,16 +733,21 @@ void CYThrow(JSContextRef context, id error, JSValueRef *exception) {
 
 @end
 
-CFStringRef CYCopyJSONString(JSContextRef context, JSValueRef value) { _pooled
-    id object(CYCastNSObject(NULL, context, value));
-    return reinterpret_cast<CFStringRef>([(object == nil ? @"null" : [object cy$toJSON]) retain]);
+CFStringRef CYCopyJSONString(JSContextRef context, JSValueRef value, JSValueRef *exception) {
+    CYTry {
+        CYPoolTry {
+            id object(CYCastNSObject(NULL, context, value));
+            return reinterpret_cast<CFStringRef>([(object == nil ? @"null" : [object cy$toJSON]) retain]);
+        } CYPoolCatch(NULL)
+    } CYCatch
 }
 
-const char *CYPoolJSONString(apr_pool_t *pool, JSContextRef context, JSValueRef value) {
-    NSString *json((NSString *) CYCopyJSONString(context, value));
-    const char *string(CYPoolCString(pool, json));
-    [json release];
-    return string;
+const char *CYPoolJSONString(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception) {
+    if (NSString *json = (NSString *) CYCopyJSONString(context, value, exception)) {
+        const char *string(CYPoolCString(pool, json));
+        [json release];
+        return string;
+    } else return NULL;
 }
 
 static void OnData(CFSocketRef socket, CFSocketCallBackType type, CFDataRef address, const void *value, void *info) {
@@ -754,7 +779,7 @@ static void OnData(CFSocketRef socket, CFSocketCallBackType type, CFDataRef addr
                 CFHTTPMessageRef response(CFHTTPMessageCreateResponse(kCFAllocatorDefault, 200, NULL, kCFHTTPVersion1_1));
                 CFHTTPMessageSetHeaderFieldValue(response, CFSTR("Content-Type"), CFSTR("application/json; charset=utf-8"));
 
-                CFStringRef json(CYCopyJSONString(CYGetJSContext(), result));
+                CFStringRef json(CYCopyJSONString(CYGetJSContext(), result, NULL));
                 CFDataRef body(CFStringCreateExternalRepresentation(kCFAllocatorDefault, json, kCFStringEncodingUTF8, NULL));
                 CFRelease(json);
 
@@ -799,7 +824,7 @@ static void OnAccept(CFSocketRef socket, CFSocketCallBackType type, CFDataRef ad
 }
 
 static JSValueRef Instance_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
-    @try {
+    CYTry {
         CYPool pool;
         NSString *name(CYCastNSString(pool, property));
         NSLog(@"get:%@", name);
@@ -808,7 +833,7 @@ static JSValueRef Instance_getProperty(JSContextRef context, JSObjectRef object,
 }
 
 static bool Instance_setProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef value, JSValueRef *exception) {
-    @try {
+    CYTry {
         CYPool pool;
         NSString *name(CYCastNSString(pool, property));
         NSLog(@"set:%@", name);
@@ -817,7 +842,7 @@ static bool Instance_setProperty(JSContextRef context, JSObjectRef object, JSStr
 }
 
 static bool Instance_deleteProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
-    @try {
+    CYTry {
         CYPool pool;
         NSString *name(CYCastNSString(pool, property));
         NSLog(@"delete:%@", name);
@@ -826,9 +851,9 @@ static bool Instance_deleteProperty(JSContextRef context, JSObjectRef object, JS
 }
 
 static JSObjectRef Instance_callAsConstructor(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
-    @try {
+    CYTry {
         jocData *data(reinterpret_cast<jocData *>(JSObjectGetPrivate(object)));
-        return CYMakeInstance(context, [data->GetValue() alloc]);
+        return CYMakeInstance(context, [data->GetValue() alloc], true);
     } CYCatch
 }
 
@@ -1000,7 +1025,7 @@ JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, void *data) {
         break;
 
         case sig::typename_P:
-            value = CYMakeInstance(context, *reinterpret_cast<Class *>(data));
+            value = CYMakeInstance(context, *reinterpret_cast<Class *>(data), true);
         break;
 
         case sig::selector_P:
@@ -1041,7 +1066,7 @@ JSValueRef CYFromFFI(JSContextRef context, sig::Type *type, void *data) {
 }
 
 static JSValueRef CYCallFunction(JSContextRef context, size_t count, const JSValueRef *arguments, JSValueRef *exception, sig::Signature *signature, ffi_cif *cif, void (*function)()) {
-    @try {
+    CYTry {
         if (count != signature->count - 1)
             @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"incorrect number of arguments to ffi function" userInfo:nil];
 
@@ -1063,7 +1088,6 @@ static JSValueRef CYCallFunction(JSContextRef context, size_t count, const JSVal
 }
 
 void Closure_(ffi_cif *cif, void *result, void **arguments, void *arg) {
-    NSLog(@"Closure()");
     ffoData *data(reinterpret_cast<ffoData *>(arg));
 
     JSContextRef context(data->context_);
@@ -1106,11 +1130,11 @@ JSObjectRef CYMakeFunctor(JSContextRef context, JSObjectRef function, const char
 }
 
 static JSValueRef Global_getProperty(JSContextRef context, JSObjectRef object, JSStringRef property, JSValueRef *exception) {
-    @try {
+    CYTry {
         CYPool pool;
         NSString *name(CYCastNSString(pool, property));
         if (Class _class = NSClassFromString(name))
-            return CYMakeInstance(context, _class);
+            return CYMakeInstance(context, _class, true);
         if (NSMutableArray *entry = [Bridge_ objectForKey:name])
             switch ([[entry objectAtIndex:0] intValue]) {
                 case 0:
@@ -1140,14 +1164,14 @@ extern "C" {
 }
 
 static JSValueRef System_print(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
-    @try {
+    CYTry {
         NSLog(@"%s", CYCastCString(context, arguments[0]));
         return CYJSUndefined(context);
     } CYCatch
 }
 
 static JSValueRef CYApplicationMain(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
-    @try {
+    CYTry {
         CYPool pool;
         NSString *name(CYCastNSObject(pool, context, arguments[0]));
         int argc(*_NSGetArgc());
@@ -1164,7 +1188,7 @@ static JSValueRef $objc_msgSend(JSContextRef context, JSObjectRef object, JSObje
 
     CYPool pool;
 
-    @try {
+    CYTry {
         if (count < 2)
             @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"too few arguments to objc_msgSend" userInfo:nil];
 
@@ -1177,11 +1201,13 @@ static JSValueRef $objc_msgSend(JSContextRef context, JSObjectRef object, JSObje
         Class _class(object_getClass(self));
         if (Method method = class_getInstanceMethod(_class, _cmd))
             type = method_getTypeEncoding(method);
-        else { _pooled
-            NSMethodSignature *method([self methodSignatureForSelector:_cmd]);
-            if (method == nil)
-                @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"unrecognized selector %s sent to object %p", sel_getName(_cmd), self] userInfo:nil];
-            type = CYPoolCString(pool, [method _typeString]);
+        else {
+            CYPoolTry {
+                NSMethodSignature *method([self methodSignatureForSelector:_cmd]);
+                if (method == nil)
+                    @throw [NSException exceptionWithName:NSInvalidArgumentException reason:[NSString stringWithFormat:@"unrecognized selector %s sent to object %p", sel_getName(_cmd), self] userInfo:nil];
+                type = CYPoolCString(pool, [method _typeString]);
+            } CYPoolCatch(NULL)
         }
     } CYCatch
 
@@ -1209,7 +1235,7 @@ static JSValueRef Functor_callAsFunction(JSContextRef context, JSObjectRef objec
 }
 
 JSObjectRef Selector_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
-    @try {
+    CYTry {
         if (count != 1)
             @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"incorrect number of arguments to Selector constructor" userInfo:nil];
         const char *name(CYCastCString(context, arguments[0]));
@@ -1218,7 +1244,7 @@ JSObjectRef Selector_new(JSContextRef context, JSObjectRef object, size_t count,
 }
 
 JSObjectRef Functor_new(JSContextRef context, JSObjectRef object, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
-    @try {
+    CYTry {
         if (count != 2)
             @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"incorrect number of arguments to Functor constructor" userInfo:nil];
         const char *type(CYCastCString(context, arguments[1]));
@@ -1244,22 +1270,25 @@ JSValueRef Selector_getProperty_prototype(JSContextRef context, JSObjectRef obje
     return Function_;
 }
 
-static JSValueRef Instance_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) { _pooled
-    @try {
+static JSValueRef Instance_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
+    CYTry {
         jocData *data(reinterpret_cast<jocData *>(JSObjectGetPrivate(_this)));
-        return CYCastJSValue(context, CYJSString([data->GetValue() description]));
+        NSString *description; CYPoolTry {
+            description = [data->GetValue() description];
+        } CYPoolCatch(NULL)
+        return CYCastJSValue(context, CYJSString(description));
     } CYCatch
 }
 
 static JSValueRef Selector_callAsFunction_toString(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
-    @try {
+    CYTry {
         selData *data(reinterpret_cast<selData *>(JSObjectGetPrivate(_this)));
         return CYCastJSValue(context, sel_getName(data->GetValue()));
     } CYCatch
 }
 
 static JSValueRef Selector_callAsFunction_type(JSContextRef context, JSObjectRef object, JSObjectRef _this, size_t count, const JSValueRef arguments[], JSValueRef *exception) {
-    @try {
+    CYTry {
         if (count != 2)
             @throw [NSException exceptionWithName:NSInvalidArgumentException reason:@"incorrect number of arguments to Selector.type" userInfo:nil];
         CYPool pool;
diff --git a/cycript.hpp b/cycript.hpp
index 1096ac1..b73d5c6 100644
--- a/cycript.hpp
+++ b/cycript.hpp
@@ -11,7 +11,7 @@
 #include <apr-1/apr_pools.h>
 
 JSGlobalContextRef CYGetJSContext();
-const char *CYPoolJSONString(apr_pool_t *pool, JSContextRef context, JSValueRef value);
+const char *CYPoolJSONString(apr_pool_t *pool, JSContextRef context, JSValueRef value, JSValueRef *exception);
 void CYSetArgs(int argc, const char *argv[]);
 
 #endif/*CYCRIPT_HPP*/
diff --git a/makefile b/makefile
index c893967..607adef 100644
--- a/makefile
+++ b/makefile
@@ -56,7 +56,7 @@ Output.o: Output.cpp Parser.hpp Pooling.hpp
 Library.o: Library.mm Cycript.tab.hh Parser.hpp Pooling.hpp Struct.hpp cycript.hpp
 	$(target)g++ $(flags) -c -o $@ $<
 
-Application.o: Application.cpp Cycript.tab.hh Parser.hpp Pooling.hpp cycript.hpp
+Application.o: Application.mm Cycript.tab.hh Parser.hpp Pooling.hpp cycript.hpp
 	$(target)g++ $(flags) -c -o $@ $<
 
 libcycript.dylib: ffi_type.o parse.o Output.o Cycript.tab.o lex.cy.o Library.o