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comparison memory_profiler_server.js @ 73:b87b6ebb6e86

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Memory profiler server is now much better at reporting errors.
author Atul Varma <varmaa@toolness.com>
date Thu, 25 Jun 2009 18:38:01 -0700
parents a98e6a1144a9
children 8cf72992387d
comparison
equal deleted inserted replaced
72:eca8642eed4a 73:b87b6ebb6e86
1 // This function is called by the platform whenever an uncaught exception
2 // occurs.
3
4 function handleError() {
5 printTraceback(lastExceptionTraceback);
6 print(lastException);
7 }
8
9 // This function uses the Python-inspired traceback functionality of the
10 // playground to print a stack trace that looks much like Python's.
11
12 function printTraceback(frame) {
13 print("Traceback (most recent call last):");
14 if (frame === undefined)
15 frame = stack();
16 var lines = [];
17 while (frame) {
18 var line = (' File "' + frame.filename + '", line ' +
19 frame.lineNo + ', in ' + frame.functionName);
20 lines.splice(0, 0, line);
21 frame = frame.caller;
22 }
23 print(lines.join('\n'));
24 }
25
1 // This is just a test to exercise the code a bit. 26 // This is just a test to exercise the code a bit.
2 JSON.stringify(getObjectInfo(getGCRoots()[0])); 27 JSON.stringify(getObjectInfo(getGCRoots()[0]));
3 28
4 var socket = new ServerSocket(); 29 var socket = new ServerSocket();
5 30
56 // but Firefox doesn't let us browse a webserver this way, which is 81 // but Firefox doesn't let us browse a webserver this way, which is
57 // annoying, so we're just leaving it at text/plain for now. 82 // annoying, so we're just leaving it at text/plain for now.
58 83
59 if (path == "/") 84 if (path == "/")
60 toSend = HELP; 85 toSend = HELP;
61 86
62 if (path == "/gc-roots") 87 if (path == "/gc-roots")
63 toSend = JSON.stringify(getGCRoots()); 88 toSend = JSON.stringify(getGCRoots());
64 89
65 if (path == "/stop") 90 if (path == "/stop")
66 toSend = "Stopping server now!"; 91 toSend = "Stopping server now!";
67 92
68 var objNum = path.match(/^\/objects\/(\d+)$/); 93 var objNum = path.match(/^\/objects\/(\d+)$/);
69 if (objNum) { 94 if (objNum) {
95 throw new Error('wut');
70 objNum = objNum[1]; 96 objNum = objNum[1];
71 var objInfo = getObjectInfo(objNum); 97 var objInfo = getObjectInfo(objNum);
72 if (objInfo) { 98 if (objInfo) {
73 toSend = JSON.stringify(objInfo); 99 toSend = JSON.stringify(objInfo);
74 } else { 100 } else {
92 //print("response: " + uneval(response)); 118 //print("response: " + uneval(response));
93 conn.send(response); 119 conn.send(response);
94 conn.close(); 120 conn.close();
95 //print("response sent."); 121 //print("response sent.");
96 } catch (e) { 122 } catch (e) {
97 print(e.toString()); 123 handleError();
98 try { conn.close(); } catch (e) {} 124 try { conn.close(); } catch (e) {}
99 } 125 }
100 if (path == "/stop") 126 if (path == "/stop")
101 return false; 127 return false;
102 return true; 128 return true;
103 } 129 }
104 130
105 while (processRequest(socket)) {} 131 var keepGoing = true;
132
133 while (keepGoing) {
134 try {
135 keepGoing = processRequest(socket);
136 } catch (e) {
137 handleError();
138 }
139 }
140
106 socket.close(); 141 socket.close();