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annotate tcb.js @ 13:d200a8158bd5

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Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
author Atul Varma <varmaa@toolness.com>
date Fri, 19 Jun 2009 15:25:32 -0700
parents e14f433f3a58
children 1f48075a404e
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10
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
Atul Varma <varmaa@toolness.com>
parents: 8
diff changeset
1 // This security function is called by the platform whenever a
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
Atul Varma <varmaa@toolness.com>
parents: 8
diff changeset
2 // particular property needs to be accessed on a particular object.
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
Atul Varma <varmaa@toolness.com>
parents: 8
diff changeset
3 function checkAccess(obj, id) {
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bde6607a3620 changed TCB/sample module code a bit.
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4 var frame = stack().caller;
bde6607a3620 changed TCB/sample module code a bit.
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parents: 10
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5 if (!(frame.filename == null ||
bde6607a3620 changed TCB/sample module code a bit.
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6 frame.filename == "tcb.js"))
bde6607a3620 changed TCB/sample module code a bit.
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7 print("access request from " + frame.filename + " on property '" + id +
bde6607a3620 changed TCB/sample module code a bit.
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8 "' of " + obj);
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e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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9 if (id == 'caller') {
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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10 if (frame.caller)
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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11 return frame.caller.functionObject;
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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12 else
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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13 return null;
e14f433f3a58 Function objects are now attached to stack frames returned by stack().
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14 }
10
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
Atul Varma <varmaa@toolness.com>
parents: 8
diff changeset
15 return lookupProperty(obj, id);
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
Atul Varma <varmaa@toolness.com>
parents: 8
diff changeset
16 }
16a605ff036c The TCB can now define a global checkAccess() handler. It also has access to a lookupProperty() function that can retrieve an attribute of an object without initiating security checks or property getters.
Atul Varma <varmaa@toolness.com>
parents: 8
diff changeset
17
8
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 7
diff changeset
18 // This function is called by the platform whenever an uncaught exception
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 7
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19 // occurs.
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
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parents: 7
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20 function handleError() {
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
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parents: 7
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21 printTraceback(lastExceptionTraceback);
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
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parents: 7
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22 print(lastException);
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
Atul Varma <varmaa@toolness.com>
parents: 7
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23 }
e14f496e6e08 added a handleError() function to the TCB, which is called whenever an unhandled exception occurs. Also fixed a bug in the setting of lastException.
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parents: 7
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24
5
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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25 function printTraceback(frame) {
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71de19be1054 Added a native stack() function.
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26 print("Traceback (most recent call last):");
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1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
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27 if (frame === undefined)
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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28 frame = stack();
4
71de19be1054 Added a native stack() function.
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29 var lines = [];
71de19be1054 Added a native stack() function.
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30 while (frame) {
71de19be1054 Added a native stack() function.
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31 var line = (' File "' + frame.filename + '", line ' +
71de19be1054 Added a native stack() function.
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32 frame.lineNo + ', in ' + frame.functionName);
71de19be1054 Added a native stack() function.
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33 lines.splice(0, 0, line);
71de19be1054 Added a native stack() function.
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34 frame = frame.caller;
71de19be1054 Added a native stack() function.
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35 }
71de19be1054 Added a native stack() function.
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36 print(lines.join('\n'));
71de19be1054 Added a native stack() function.
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37 }
71de19be1054 Added a native stack() function.
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38
5
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
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39 function throwError() {
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
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40 function innerThrowError() {
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d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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parents: 12
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41 var x = 1;
5
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
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42 throw new Error("hi");
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
Atul Varma <varmaa@toolness.com>
parents: 4
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43 }
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
Atul Varma <varmaa@toolness.com>
parents: 4
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44 innerThrowError();
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
Atul Varma <varmaa@toolness.com>
parents: 4
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45 }
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
Atul Varma <varmaa@toolness.com>
parents: 4
diff changeset
46
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
Atul Varma <varmaa@toolness.com>
parents: 4
diff changeset
47 try {
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
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48 throwError();
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
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49 } catch (e) {
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d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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parents: 12
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50 print("caught an intentional error. local variables in scope chain: ");
d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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parents: 12
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51 var scopeChain = lastExceptionTraceback.scopeChain;
d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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parents: 12
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52 for (name in scopeChain)
d200a8158bd5 Fixed a bug in the throw hook, added a 'scopeChain' property to stack frames.
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parents: 12
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53 print(" " + name + ": " + scopeChain[name]);
5
1f38f4f61768 added global lastException and lastExceptionTraceback properties to the TCB global, which are similar to python's exc_info().
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parents: 4
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54 }
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1f3e9c8df4f0 Script is now read from tcb.js.
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55
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1b374020485b Added more code to sample securableModule
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56 var module = require("sample-module.js", {blop: "hello"});
6
500e267ed094 Added a really simple securableModule require() implementation.
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57
500e267ed094 Added a really simple securableModule require() implementation.
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58 print("module.foo() is " + module.foo());
500e267ed094 Added a really simple securableModule require() implementation.
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59
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1f3e9c8df4f0 Script is now read from tcb.js.
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60 var wrapped = wrap({}, {});