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• Floating point undesireable in highly critical code?

  - by Kirt Undercoffer

  Question 11 in the Software Quality section of "IEEE Computer Society Real-World Software Engineering Problems", Naveda, Seidman, lists fp computation as undesirable because "the accuracy of the computations cannot be guaranteed". This is in the context of computing acceleration for an emergency braking system for a high speed train. This thinking seems to be invoking possible errors in small differences between measurements of a moving object but small differences at slow speeds aren't a problem (or shouldn't be), small differences between two measurements at high speed are irrelevant - can there be a problem with small roundoff errors during deceleration for an emergency braking system? This problem has been observed with airplane braking systems resulting in hydroplaning but could this actually happen in the context of a high speed train? The concern about fp errors seems to not be well-founded in this context. Any insight? The fp is used for acceleration so perhaps the concern is inching over a speed limit? But fp should be just fine if they use a double in whatever implementation language. The actual problem in the text states: During the inspection of the code for the emergency braking system of a new high speed train (a highly critical, real-time application), the review team identifies several characteristics of the code. Which of these characteristics are generally viewed as undesirable? The code contains three recursive functions (well that one is obvious). The computation of acceleration uses floating point arithmetic. All other computations use integer arithmetic. The code contains one linked list that uses dynamic memory allocation (second obvious problem). All inputs are checked to determine that they are within expected bounds before they are used.

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• Wanted: Java Code Brainteasers

  - by Tori Wieldt

  The Jan/Feb Java Magazine will go out next week. It's full of great Java stories, interviews and technical articles. It also includes a Fix This section; the idea of this section is challenging a Java developer's coding skills. It's a multiple-choice brainteaser that includes code and possible answers. The answer is provided in the next issue. For an example, check out Fix This in the Java Magazine premier issue. We are looking for community submissions to Fix This. Do you have a good code brain teaser? Remember, you want tease your fellow devs, not stump them completely! If you have a submission, here's what you do:  1. State the problem, including a short summary of the tool/technique, in about 75 words. 2. Send us the code snippet, with a short set-up so readers know what they are looking at (such as, "Consider the following piece of code to have database access within a Servlet.") 3. Provide four multiple-choice answers to the question, "What's the fix?" 4. Give us the answer, along with a brief explanation of why. 5. Tell us who you are (name, occupation, etc.) 6. Email the above to JAVAMAG_US at ORACLE.COM with "Fix This Submission" in the title. Deadlines for Fix This for next two issues of Java Magazine are Dec. 12th and Jan. 15th. Bring It!

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• How to tell your boss that he's a bad programmer? [closed]

  - by Doe

  Possible Duplicate: How to tell your boss that his programming style is really bad? There was a question about the boss having a bad programming style (weird booleans, empty loops, etc.) Having a bad/weird style does not imply being a bad programmer, but my situation is different. My boss outputs some really nasty code for the project, on which we are working together (just two of us). Examples: functions that span over several screens (big screens - 1900 x 1200) Deeply nested Conditional and Loop statements (up to 10 levels!!) Too much static variables, singletons, and both (singleton class with all the methods and members also static) Sometimes the code committed to the version control system does not even compile! Copy-Paste code instead of separating it into an independent function. Fail all the deadlines. "This's [C#|Java|Python] it shouldn't be efficient, that's why we loop all over the haystack to find the needle." "This's C/C++, it's fast enough to loop all over the haystack to find the needle." There is much more to mention... But the worst is that I have to redo much of the stuff he does, my code, which I try to keep clean is often polluted with above-mentioned atrocities. He's reaching 30 soon, so all his skills are established, and I don't even know if it's possible to change something. I like the project, but sometimes I just want to quit...

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• Floating point undesirable in highly critical code?

  - by Kirt Undercoffer

  Question 11 in the Software Quality section of "IEEE Computer Society Real-World Software Engineering Problems", Naveda, Seidman, lists fp computation as undesirable because "the accuracy of the computations cannot be guaranteed". This is in the context of computing acceleration for an emergency braking system for a high speed train. This thinking seems to be invoking possible errors in small differences between measurements of a moving object but small differences at slow speeds aren't a problem (or shouldn't be), small differences between two measurements at high speed are irrelevant - can there be a problem with small roundoff errors during deceleration for an emergency braking system? This problem has been observed with airplane braking systems resulting in hydroplaning but could this actually happen in the context of a high speed train? The concern about fp errors seems to not be well-founded in this context. Any insight? The fp is used for acceleration so perhaps the concern is inching over a speed limit? But fp should be just fine if they use a double in whatever implementation language. The actual problem in the text states: During the inspection of the code for the emergency braking system of a new high speed train (a highly critical, real-time application), the review team identifies several characteristics of the code. Which of these characteristics are generally viewed as undesirable? The code contains three recursive functions (well that one is obvious). The computation of acceleration uses floating point arithmetic. All other computations use integer arithmetic. The code contains one linked list that uses dynamic memory allocation (second obvious problem). All inputs are checked to determine that they are within expected bounds before they are used.

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• How often do you look for code examples?

  - by Newly Insecure

  I am a comp sci student with several years of experience in C and C++, and for the last few years I've been constantly working with Java/Objective C doing app dev and now I have switched to web dev and am mainly focused on ruby on rails and I came to the realization that (as with app dev, really) I reference other code wayyyy too much. I constantly google functionality for lots of things I imagine I should be able to do from scratch and it's really cracked my confidence a bit. Basic fundamentals are not an issue, I hate to use this as an example but I can run through javabat in both java/python at a sprint - obviously not an accomplishment and but what I mean to say is I have a strong base for the fundamentals I think? I was wondering how often you guys reference other code and does it just boil down to a lack of memorization of intricate tasks on my part? I know what I need to use typically but reference syntax constantly. Would love some advice and input on this, as it has been holding me back pretty solidly in terms of looking for work in this field even though I'm finishing my degree. My main reason for asking is not really about employment, but more that I don't want to be the only guy at a hackathon not hammering out nonstop code and sitting there with 20 google/github tabs open, and I have refrained from attending any due to a slight lack of confidence... tl;dr: I google for code examples for basically ALL semi advanced/advanced functionality, how to fix this and do you do as well?

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• Android edtftpj/PRo SFTP heap worker problem

  - by Mr. Kakakuwa Bird

  Hi I am using edtftpj-pro3.1 trial copy in my android app to make SFTP connection with the server. After few connections with the server with 5-6 file transfers, my app is crashing with following exception. Is it causing the problem or what could be the problem?? I tried setParallelMode(false) in SSHFTPClient, but it is not working. Exception i'm getting is, 05-31 18:28:12.661: ERROR/dalvikvm(589): HeapWorker is wedged: 10173ms spent inside Lcom/enterprisedt/net/j2ssh/sftp/SftpFileInputStream;.finalize()V 05-31 18:28:12.661: INFO/dalvikvm(589): DALVIK THREADS: 05-31 18:28:12.661: INFO/dalvikvm(589): "main" prio=5 tid=3 WAIT 05-31 18:28:12.661: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x4001b260 self=0xbd18 05-31 18:28:12.661: INFO/dalvikvm(589): | sysTid=589 nice=0 sched=0/0 cgrp=default handle=-1343993192 05-31 18:28:12.661: INFO/dalvikvm(589): at java.lang.Object.wait(Native Method) 05-31 18:28:12.661: INFO/dalvikvm(589): - waiting on <0x122d70 (a android.os.MessageQueue) 05-31 18:28:12.661: INFO/dalvikvm(589): at java.lang.Object.wait(Object.java:288) 05-31 18:28:12.661: INFO/dalvikvm(589): at android.os.MessageQueue.next(MessageQueue.java:148) 05-31 18:28:12.661: INFO/dalvikvm(589): at android.os.Looper.loop(Looper.java:110) 05-31 18:28:12.661: INFO/dalvikvm(589): at android.app.ActivityThread.main(ActivityThread.java:4363) 05-31 18:28:12.661: INFO/dalvikvm(589): at java.lang.reflect.Method.invokeNative(Native Method) 05-31 18:28:12.661: INFO/dalvikvm(589): at java.lang.reflect.Method.invoke(Method.java:521) 05-31 18:28:12.661: INFO/dalvikvm(589): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) 05-31 18:28:12.661: INFO/dalvikvm(589): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) 05-31 18:28:12.661: INFO/dalvikvm(589): at dalvik.system.NativeStart.main(Native Method) 05-31 18:28:12.671: INFO/dalvikvm(589): "Transport protocol 1" daemon prio=5 tid=29 NATIVE 05-31 18:28:12.671: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x44774768 self=0x3a7938 05-31 18:28:12.671: INFO/dalvikvm(589): | sysTid=605 nice=0 sched=0/0 cgrp=default handle=3834600 05-31 18:28:12.671: INFO/dalvikvm(589): at org.apache.harmony.luni.platform.OSNetworkSystem.receiveStreamImpl(Native Method) 05-31 18:28:12.671: INFO/dalvikvm(589): at org.apache.harmony.luni.platform.OSNetworkSystem.receiveStream(OSNetworkSystem.java:478) 05-31 18:28:12.671: INFO/dalvikvm(589): at org.apache.harmony.luni.net.PlainSocketImpl.read(PlainSocketImpl.java:565) 05-31 18:28:12.671: INFO/dalvikvm(589): at org.apache.harmony.luni.net.SocketInputStream.read(SocketInputStream.java:87) 05-31 18:28:12.671: INFO/dalvikvm(589): at org.apache.harmony.luni.net.SocketInputStream.read(SocketInputStream.java:67) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.io.BufferedInputStream.fillbuf(BufferedInputStream.java:157) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.io.BufferedInputStream.read(BufferedInputStream.java:346) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.io.BufferedInputStream.read(BufferedInputStream.java:341) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.transport.A.A((null):-1) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.transport.A.B((null):-1) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.processMessages((null):-1) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.startBinaryPacketProtocol((null):-1) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.transport.TransportProtocolCommon.run((null):-1) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.lang.Thread.run(Thread.java:1096) 05-31 18:28:12.671: INFO/dalvikvm(589): "StreamFrameSender" prio=5 tid=27 TIMED_WAIT 05-31 18:28:12.671: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x44750a60 self=0x3964d8 05-31 18:28:12.671: INFO/dalvikvm(589): | sysTid=603 nice=0 sched=0/0 cgrp=default handle=3761648 05-31 18:28:12.671: INFO/dalvikvm(589): at java.lang.Object.wait(Native Method) 05-31 18:28:12.671: INFO/dalvikvm(589): - waiting on <0x399478 (a com.corventis.gateway.ppp.StreamFrameSender) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.lang.Object.wait(Object.java:326) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.corventis.gateway.ppp.StreamFrameSender.run(StreamFrameSender.java:154) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.corventis.gateway.util.MonitoredRunnable.run(MonitoredRunnable.java:41) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.lang.Thread.run(Thread.java:1096) 05-31 18:28:12.671: INFO/dalvikvm(589): "SftpActiveWorker" prio=5 tid=25 TIMED_WAIT 05-31 18:28:12.671: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x447522b0 self=0x398e00 05-31 18:28:12.671: INFO/dalvikvm(589): | sysTid=604 nice=0 sched=0/0 cgrp=default handle=3762704 05-31 18:28:12.671: INFO/dalvikvm(589): at java.lang.Object.wait(Native Method) 05-31 18:28:12.671: INFO/dalvikvm(589): - waiting on <0x3962d8 (a com.corventis.gateway.hostcommunicator.SftpActiveWorker) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.lang.Object.wait(Object.java:326) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.corventis.gateway.hostcommunicator.SftpActiveWorker.run(SftpActiveWorker.java:151) 05-31 18:28:12.671: INFO/dalvikvm(589): at com.corventis.gateway.util.MonitoredRunnable.run(MonitoredRunnable.java:41) 05-31 18:28:12.671: INFO/dalvikvm(589): at java.lang.Thread.run(Thread.java:1096) 05-31 18:28:12.671: INFO/dalvikvm(589): "Thread-12" prio=5 tid=23 NATIVE 05-31 18:28:12.671: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x4474aca8 self=0x115690 05-31 18:28:12.671: INFO/dalvikvm(589): | sysTid=602 nice=0 sched=0/0 cgrp=default handle=878120 05-31 18:28:12.671: INFO/dalvikvm(589): at android.bluetooth.BluetoothSocket.acceptNative(Native Method) 05-31 18:28:12.681: INFO/dalvikvm(589): at android.bluetooth.BluetoothSocket.accept(BluetoothSocket.java:287) 05-31 18:28:12.681: INFO/dalvikvm(589): at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:105) 05-31 18:28:12.681: INFO/dalvikvm(589): at android.bluetooth.BluetoothServerSocket.accept(BluetoothServerSocket.java:91) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.bluetooth.BluetoothManager.openPort(BluetoothManager.java:215) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.bluetooth.BluetoothManager.open(BluetoothManager.java:84) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.patchcommunicator.PatchCommunicator.open(PatchCommunicator.java:123) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.patchcommunicator.PatchCommunicatorRunnable.run(PatchCommunicatorRunnable.java:134) 05-31 18:28:12.681: INFO/dalvikvm(589): at java.lang.Thread.run(Thread.java:1096) 05-31 18:28:12.681: INFO/dalvikvm(589): "HfGatewayApplication" prio=5 tid=21 RUNNABLE 05-31 18:28:12.681: INFO/dalvikvm(589): | group="main" sCount=0 dsCount=0 s=N obj=0x4472d9b0 self=0x120928 05-31 18:28:12.681: INFO/dalvikvm(589): | sysTid=601 nice=0 sched=0/0 cgrp=default handle=1264672 05-31 18:28:12.681: INFO/dalvikvm(589): at com.jcraft.jzlib.Deflate.deflateInit2(Deflate.java:~1361) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.jcraft.jzlib.Deflate.deflateInit(Deflate.java:1316) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.jcraft.jzlib.ZStream.deflateInit(ZStream.java:127) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.jcraft.jzlib.ZStream.deflateInit(ZStream.java:120) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.jcraft.jzlib.ZOutputStream.(ZOutputStream.java:62) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.zipfile.ZipStorer.addStream(ZipStorer.java:211) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.zipfile.ZipStorer.createZip(ZipStorer.java:127) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.hostcommunicator.HostCommunicator.scanAndCompress(HostCommunicator.java:453) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.hostcommunicator.HostCommunicator.doWork(HostCommunicator.java:1434) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.hf.HfGatewayApplication.doWork(HfGatewayApplication.java:621) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.hf.HfGatewayApplication.run(HfGatewayApplication.java:546) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.util.MonitoredRunnable.run(MonitoredRunnable.java:41) 05-31 18:28:12.681: INFO/dalvikvm(589): at java.lang.Thread.run(Thread.java:1096) 05-31 18:28:12.681: INFO/dalvikvm(589): "Thread-10" prio=5 tid=19 TIMED_WAIT 05-31 18:28:12.681: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x447287f8 self=0x1451b8 05-31 18:28:12.681: INFO/dalvikvm(589): | sysTid=598 nice=0 sched=0/0 cgrp=default handle=1331920 05-31 18:28:12.681: INFO/dalvikvm(589): at java.lang.VMThread.sleep(Native Method) 05-31 18:28:12.681: INFO/dalvikvm(589): at java.lang.Thread.sleep(Thread.java:1306) 05-31 18:28:12.681: INFO/dalvikvm(589): at java.lang.Thread.sleep(Thread.java:1286) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.util.Watchdog.run(Watchdog.java:167) 05-31 18:28:12.681: INFO/dalvikvm(589): at java.lang.Thread.run(Thread.java:1096) 05-31 18:28:12.681: INFO/dalvikvm(589): "Thread-9" prio=5 tid=17 RUNNABLE 05-31 18:28:12.681: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=Y obj=0x44722c90 self=0x114e20 05-31 18:28:12.681: INFO/dalvikvm(589): | sysTid=597 nice=0 sched=0/0 cgrp=default handle=1200048 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.time.Time.currentTimeMillis(Time.java:~77) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.patchcommunicator.PatchCommunicatorState$1.run(PatchCommunicatorState.java:27) 05-31 18:28:12.681: INFO/dalvikvm(589): "Thread-8" prio=5 tid=15 RUNNABLE 05-31 18:28:12.681: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=Y obj=0x44722430 self=0x124dd0 05-31 18:28:12.681: INFO/dalvikvm(589): | sysTid=596 nice=0 sched=0/0 cgrp=default handle=1199848 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.time.Time.currentTimeMillis(Time.java:~80) 05-31 18:28:12.681: INFO/dalvikvm(589): at com.corventis.gateway.hostcommunicator.HostCommunicatorState$1.run(HostCommunicatorState.java:35) 05-31 18:28:12.681: INFO/dalvikvm(589): "Binder Thread #2" prio=5 tid=13 NATIVE 05-31 18:28:12.681: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x4471ccc0 self=0x149b60 05-31 18:28:12.681: INFO/dalvikvm(589): | sysTid=595 nice=0 sched=0/0 cgrp=default handle=1317992 05-31 18:28:12.681: INFO/dalvikvm(589): at dalvik.system.NativeStart.run(Native Method) 05-31 18:28:12.681: INFO/dalvikvm(589): "Binder Thread #1" prio=5 tid=11 NATIVE 05-31 18:28:12.681: INFO/dalvikvm(589): | group="main" sCount=1 dsCount=0 s=N obj=0x447159a8 self=0x123298 05-31 18:28:12.681: INFO/dalvikvm(589): | sysTid=594 nice=0 sched=0/0 cgrp=default handle=1164896 05-31 18:28:12.681: INFO/dalvikvm(589): at dalvik.system.NativeStart.run(Native Method) 05-31 18:28:12.691: INFO/dalvikvm(589): "JDWP" daemon prio=5 tid=9 VMWAIT 05-31 18:28:12.691: INFO/dalvikvm(589): | group="system" sCount=1 dsCount=0 s=N obj=0x4470f2a0 self=0x141a90 05-31 18:28:12.691: INFO/dalvikvm(589): | sysTid=593 nice=0 sched=0/0 cgrp=default handle=1316864 05-31 18:28:12.691: INFO/dalvikvm(589): at dalvik.system.NativeStart.run(Native Method) 05-31 18:28:12.691: INFO/dalvikvm(589): "Signal Catcher" daemon prio=5 tid=7 VMWAIT 05-31 18:28:12.691: INFO/dalvikvm(589): | group="system" sCount=1 dsCount=0 s=N obj=0x4470f1e8 self=0x124970 05-31 18:28:12.691: INFO/dalvikvm(589): | sysTid=592 nice=0 sched=0/0 cgrp=default handle=1316800 05-31 18:28:12.691: INFO/dalvikvm(589): at dalvik.system.NativeStart.run(Native Method) 05-31 18:28:12.691: INFO/dalvikvm(589): "HeapWorker" daemon prio=5 tid=5 MONITOR 05-31 18:28:12.691: INFO/dalvikvm(589): | group="system" sCount=1 dsCount=0 s=N obj=0x431b4550 self=0x141670 05-31 18:28:12.691: INFO/dalvikvm(589): | sysTid=591 nice=0 sched=0/0 cgrp=default handle=1316400 05-31 18:28:12.691: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.sftp.SftpSubsystemClient.closeHandle((null):~-1) 05-31 18:28:12.691: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.sftp.SftpSubsystemClient.closeFile((null):-1) 05-31 18:28:12.691: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.sftp.SftpFile.close((null):-1) 05-31 18:28:12.691: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.sftp.SftpFileInputStream.close((null):-1) 05-31 18:28:12.691: INFO/dalvikvm(589): at com.enterprisedt.net.j2ssh.sftp.SftpFileInputStream.finalize((null):-1) 05-31 18:28:12.691: INFO/dalvikvm(589): at dalvik.system.NativeStart.run(Native Method) 05-31 18:28:12.691: ERROR/dalvikvm(589): VM aborting 05-31 18:28:12.801: INFO/DEBUG(49): * ** * ** * ** * ** * ** * 05-31 18:28:12.801: INFO/DEBUG(49): Build fingerprint: 'google/passion/passion/mahimahi:2.1-update1/ERE27/24178:user/release-keys' 05-31 18:28:12.801: INFO/DEBUG(49): pid: 589, tid: 601 com.corventis.gateway.hf <<< 05-31 18:28:12.801: INFO/DEBUG(49): signal 11 (SIGSEGV), fault addr deadd00d 05-31 18:28:12.801: INFO/DEBUG(49): r0 00000026 r1 afe13329 r2 afe13329 r3 00000000 05-31 18:28:12.801: INFO/DEBUG(49): r4 ad081f50 r5 400091e8 r6 009b3a6a r7 00000000 05-31 18:28:12.801: INFO/DEBUG(49): r8 000002e8 r9 ad082ba0 10 ad082ba0 fp 00000000 05-31 18:28:12.801: INFO/DEBUG(49): ip deadd00d sp 46937c58 lr afe14373 pc ad035b4c cpsr 20000030 05-31 18:28:12.851: INFO/DEBUG(49): #00 pc 00035b4c /system/lib/libdvm.so 05-31 18:28:12.861: INFO/DEBUG(49): #01 pc 00044d7c /system/lib/libdvm.so 05-31 18:28:12.861: INFO/DEBUG(49): #02 pc 000162e4 /system/lib/libdvm.so 05-31 18:28:12.861: INFO/DEBUG(49): #03 pc 00016b60 /system/lib/libdvm.so 05-31 18:28:12.861: INFO/DEBUG(49): #04 pc 00016ce0 /system/lib/libdvm.so 05-31 18:28:12.861: INFO/DEBUG(49): #05 pc 00057b64 /system/lib/libdvm.so 05-31 18:28:12.861: INFO/DEBUG(49): #06 pc 00057cc0 /system/lib/libdvm.so 05-31 18:28:12.871: INFO/DEBUG(49): #07 pc 00057dd4 /system/lib/libdvm.so 05-31 18:28:12.871: INFO/DEBUG(49): #08 pc 00012ffc /system/lib/libdvm.so 05-31 18:28:12.871: INFO/DEBUG(49): #09 pc 00019338 /system/lib/libdvm.so 05-31 18:28:12.871: INFO/DEBUG(49): #10 pc 00018804 /system/lib/libdvm.so 05-31 18:28:12.871: INFO/DEBUG(49): #11 pc 0004eed0 /system/lib/libdvm.so 05-31 18:28:12.871: INFO/DEBUG(49): #12 pc 0004eef8 /system/lib/libdvm.so 05-31 18:28:12.871: INFO/DEBUG(49): #13 pc 000426d4 /system/lib/libdvm.so 05-31 18:28:12.881: INFO/DEBUG(49): #14 pc 0000fd74 /system/lib/libc.so 05-31 18:28:12.881: INFO/DEBUG(49): #15 pc 0000f840 /system/lib/libc.so 05-31 18:28:12.881: INFO/DEBUG(49): code around pc: 05-31 18:28:12.881: INFO/DEBUG(49): ad035b3c 58234808 b1036b9b f8df4798 2026c01c 05-31 18:28:12.881: INFO/DEBUG(49): ad035b4c 0000f88c ef52f7d8 0004c428 fffe631c 05-31 18:28:12.881: INFO/DEBUG(49): ad035b5c fffe94f4 000002f8 deadd00d f8dfb40e 05-31 18:28:12.881: INFO/DEBUG(49): code around lr: 05-31 18:28:12.881: INFO/DEBUG(49): afe14360 686768a5 f9b5e008 b120000c 46289201 05-31 18:28:12.881: INFO/DEBUG(49): afe14370 9a014790 35544306 37fff117 6824d5f3 05-31 18:28:12.881: INFO/DEBUG(49): afe14380 d1ed2c00 bdfe4630 00026ab0 000000b4 05-31 18:28:12.881: INFO/DEBUG(49): stack: 05-31 18:28:12.881: INFO/DEBUG(49): 46937c18 00000015 05-31 18:28:12.881: INFO/DEBUG(49): 46937c1c afe13359 /system/lib/libc.so 05-31 18:28:12.881: INFO/DEBUG(49): 46937c20 afe3b02c /system/lib/libc.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c24 afe3afd8 /system/lib/libc.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c28 00000000 05-31 18:28:12.891: INFO/DEBUG(49): 46937c2c afe14373 /system/lib/libc.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c30 afe13329 /system/lib/libc.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c34 afe13329 /system/lib/libc.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c38 afe13380 /system/lib/libc.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c3c ad081f50 /system/lib/libdvm.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c40 400091e8 /dev/ashmem/mspace/dalvik-heap/zygote/0 (deleted) 05-31 18:28:12.891: INFO/DEBUG(49): 46937c44 009b3a6a 05-31 18:28:12.891: INFO/DEBUG(49): 46937c48 00000000 05-31 18:28:12.891: INFO/DEBUG(49): 46937c4c afe1338d /system/lib/libc.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c50 df002777 05-31 18:28:12.891: INFO/DEBUG(49): 46937c54 e3a070ad 05-31 18:28:12.891: INFO/DEBUG(49): #00 46937c58 ad06f573 /system/lib/libdvm.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c5c ad044d81 /system/lib/libdvm.so 05-31 18:28:12.891: INFO/DEBUG(49): #01 46937c60 000027bd 05-31 18:28:12.891: INFO/DEBUG(49): 46937c64 00000000 05-31 18:28:12.891: INFO/DEBUG(49): 46937c68 463b6ab4 /data/dalvik-cache/data@[email protected]@classes.dex 05-31 18:28:12.891: INFO/DEBUG(49): 46937c6c 463d1ecf /data/dalvik-cache/data@[email protected]@classes.dex 05-31 18:28:12.891: INFO/DEBUG(49): 46937c70 00140450 [heap] 05-31 18:28:12.891: INFO/DEBUG(49): 46937c74 ad041d2b /system/lib/libdvm.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c78 ad082f2c /system/lib/libdvm.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c7c ad06826c /system/lib/libdvm.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c80 00140450 [heap] 05-31 18:28:12.891: INFO/DEBUG(49): 46937c84 00000000 05-31 18:28:12.891: INFO/DEBUG(49): 46937c88 000002f8 05-31 18:28:12.891: INFO/DEBUG(49): 46937c8c 400091e8 /dev/ashmem/mspace/dalvik-heap/zygote/0 (deleted) 05-31 18:28:12.891: INFO/DEBUG(49): 46937c90 ad081f50 /system/lib/libdvm.so 05-31 18:28:12.891: INFO/DEBUG(49): 46937c94 000002f8 05-31 18:28:12.891: INFO/DEBUG(49): 46937c98 00002710 05-31 18:28:12.891: INFO/DEBUG(49): 46937c9c ad0162e8 /system/lib/libdvm.so Thanks & Regards,

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• net.tcp Listener Adapter and net.tcp Port Sharing Service not starting on reboot

  - by Peter K.

  I am using the net.tcp protocol for various web services. When I reboot my Windows 7 Ultimate (64-bit) macbook pro, the service never restarts automatically, even though that is how they are set: The only relevant events I can see are in the System Event Log: Error 6/9/2011 19:47 Service Control Manager 7001 None The Net.Tcp Listener Adapter service depends on the Net.Tcp Port Sharing Service service which failed to start because of the following error: The service did not respond to the start or control request in a timely fashion." Error 6/9/2011 19:47 Service Control Manager 7000 None The Net.Tcp Port Sharing Service service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion." Error 6/9/2011 19:47 Service Control Manager 7009 None A timeout was reached (30000 milliseconds) while waiting for the Net.Tcp Port Sharing Service service to connect. This post suggests that it's something else blocking the port (in the post it's SCCM 2007 R3 Client which I don't use). What else could be the problem? If it's something else blocking the port, how do I figure out what? When I manually start the services, they start correctly. Dependencies are: Net.Tcp Port Sharing Service Net.Tcp Listener Adapter Still no luck, but I think the problem might be that my network connection takes too long to come up. I put in a custom view of the event log, and found these items: The first in the series says: A timeout was reached (30000 milliseconds) while waiting for the Net.Tcp Port Sharing Service service to connect.

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• Synergy on macbook with osx mavericks wifi connection

  - by user332956

  I'm trying to set up Synergy with my macbook pro running OS X 10.9.3 as a client and my Windows 7 desktop as a server. I'm having some pretty bad connection problems though when I try to use my mac. Every couple seconds the mouse or the keyboard will stop working entirely then come back. I ran some tests and found that the ping from my desktop to my mac would be very high every third ping or so(1000+ ms) or sometimes even time out. If I ping my desktop from my mac the pings are all reasonably low. I believe that this is a power saving feature of Mavericks and I have found a way to get around it by continually pinging my router on my mac, keeping my wifi card from going to sleep. I'm using this right now to type this up with synergy and have had zero issues. Has anyone else ran into this issue and found a better solution? So far, I think my best bet would be to buy an ethernet adapter but I'd rather not have yet another cable running across my desk.

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• USB Device Not Recognized (Mac)

  - by Nargis

  Fortunately, my Mac-pro also made one of my USB storage devices inoperable. My data loss in that USB device but such as another USB device and USB keyboard are unaffected. I have heard that my friend usually trigger this problem by having at least two devices plugged in - typically thumb drives/USB flash drives, and then once a second flash drive is plugged in that become unrecognized. I have only two USB ports and first I think port loose when I connect two USB devices. But later I found these hidden files (“.Spotlight-V100”, “.TemporaryItems”, “.Trashes”, and “._.Trashes”) are created by Mac OS. And before unrecognized that USB device I have deleted these files and my friend had also done the same action. Now I don’t want to test for next USB device to become unrecognized and I won’t deleted any hidden system file inside the flash drives. But I really want to know why these problems happened. Can I delete these hidden files when I only connect to virtual machine (Vista), because I used to delete all useless hidden files from USB flash drives? Any suggestions or thoughts to prevent this or alternative suggestions to fix the problem that take lossless would be much appreciated.

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• are there code signing certificates cheaper than US $99 per year? [closed]

  - by gerryLowry

  ksoftware discounts Commodo code signing certificates to US $99 per year. in the past, I've seen Commodo code signing certificates for US $80. I'm excluding CAcert which AFAIK are FREE but are not covered by browsers like IE AFAIK. QUESTION: What is the best price per year for a code signing certificate? Thank you ~~ gerry (lowry) Edit: **THIS SHOULD NOT HAVE BEEN CLOSED** from the FAQ: http://stackoverflow.com/faq ---------------------------- What kind of questions can I ask here? Programming questions, of course! As long as your question is: * detailed and specific <====== YES! * written clearly and simply <====== YES! * of interest to other programmers <====== YES! I've been programming for over 40 years. http://gerrylowryprogrammer.com/ I've taught computer programming at the community college level. I'm a Star level contributer to forums.asp.net. http://forums.asp.net/members/gerrylowry.aspx imo, I've a very good idea what is of interest to other programmers. MORE INFORMATION Ensuring the integrity of code and executables that one distributes is just as much about programming as is knowing how to flip bits in assembler, use delegates in c#, and use the BDD context/specification still of "test first testing".

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• Static code analysis for new language. Where to start?

  - by tinny

  I just been given a new assignment which looks like its going to be an interesting challenge. The customer is wanting a code style checking tool to be developed for their internal (soon to be open sourced) programming language which runs on the JVM. The language syntax is very Java like. The customer basically wants me to produce something like checkstyle. So my question is this, how would you approach this problem? Given a clean slate what recommendations would you make to the customer? I think I have 3 options Write something from scratch. Id prefer not to do this as it seems like this sort of code analysis tool problem has been solved so many times that there must be a more "framework" or "platform" orientated approach. Fork an existing code style checking tool and modify the parsing to fit with this new language etc etc Extend or plug into an existing static code analysis tool. (maybe write a plugin for Yasca?) Maybe you would like to share your experiences in this area? Thanks for reading

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• Are there any code critique sites or similar resources?

  - by Ukko

  I have noticed when people post example code illustrating some issue that they are having often they will gather a number of comments addressing the quality of the code they presented and not the actual problem asked. This is very helpful--if not well directed. Often, this is wasted effort since the asker is often not receptive and the code is often chopped down to something small to post leaving lots of rough edges. In the old days you would see people asking questions like this on comp.lang.lisp and other parts of the comp.lang hierarchy. But that bit of the net kind of sank into the sewers of neglect. Is there a comparable one-stop-shop today? I am partially asking for selfish reasons, I know how to write good idiomatic C, Lisp, O'Caml, and Java code. But I learned C++ pre-template and STL, those rusty skills are not really applicable to today's C++. I have picked up languages like Scala in a vacuum and get by, but am I really doing it correctly? There are so many ways you can abuse a language, I am currently working against a codebase of Fortran written in C, and I recognize and loathe the "that guy" who wrote it. I don't want to be someone else's "that guy" if I can help it. Just because it works does not mean that one did not totally miss the boat on how it should have been done. Do you seek out this type of critique? If so how, where and why? What types of benefits do you derive from it? How about abuse and trolls?

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• Best/Bad practices for code sharing?

  - by sunpech

  The more I explore Github, the more I like it. I really enjoy how coding is becoming more social. I'm curious as to if there are any bad practices that programmers should avoid in sharing their code with each other. And in naming bad practices, what are the best practices for code sharing? For example: Is it a bad practice for a single repo to have multiple scripts/projects named 'MiscProjects'? Where this repo, as the name suggest, is a collection of miscellaneous small scripts and projects. This may resemble how a programmer organizes projects on his/her local storage, but it's possibly not optimal for code sharing? Maybe if a good README/documentation is done, it would be better? Or as long as it's well documented, anything goes?

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• Comment intégrer des chaines binaires dans un code source python en base64, par Jean-Paul Vidal

  On appellera ici ?chaine binaire? une chaine de caractères dans laquelle chaque caractère peut avoir une valeur de 0 à 255 (bornes comprises). Intégrer une chaine binaire dans le code source n'est pas facile, parce que la chaine binaire peut comporter a priori des octets de 0 à 255, mais les caractères intégrables dans le code source, donc affichables, devraient exclure au minimum les caractères de contrôles inférieurs à 32, certains caractères comme les guillemets ou les backslashs et se limiter à des octets inférieurs 128 (c'est-à-dire rester à 7 bits) pour échapper aux problèmes d'encodages. On va utiliser ici le module base64. Comment intégrer des chaines binaires dans le code source en base6...

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• Micro QR Code Generator with minimal error correction

  - by Florian Peschka

  I am searching a Micro QR Code Generator that fulfills the following requirements: At least 20 characters encoded Minimal error correction (required to get the 20 characters stuffed in) I already searched google, but it seems all micro qr generators automatically use maximum error correction, which is very unhandy for my task, as we need the 20 characters completety. I can't use standard QR because there are certain requirements that need the code to be smaller than a certain dimension when printed... I hope someone can help me. PS: I'm not sure that this is the right board to post this question on, so feel free to redirect me to a better board if you have an idea. PPS: If nothing can be found and I'm forced to write one on my own: Where can I find detailed information on how to write a QR code generator?

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• Are CK Metrics still considered useful? Is there an open source tool to help?

  - by DeveloperDon

  Chidamber & Kemerer proposed several metrics for object oriented code. Among them, depth of inheritance tree, weighted number of methods, number of member functions, number of children, and coupling between objects. Using a base of code, they tried to correlated these metrics to the defect density and maintenance effort using covariant analysis. Are these metrics actionable in projects? Perhaps they can guide refactoring. For example weighted number of methods might show which God classes needed to be broken into more cohesive classes that address a single concern. Is there approach superseded by a better method, and is there a tool that can identify problem code, particularly in moderately large project being handed off to a new developer or team?

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• Security issue about making my code public in GitHub

  - by John Doe

  I'm developing a big community/forum website and I'd like to upload my code to GitHub to have at least some sort of version control over it (because I have nothing other than a .rar file as a backup, not even SVN), to let others contribute to the project, and also perhaps using it to let my potential future employers see some of my code as some sort of curriculum. But what I'm wondering now, and I'm suprised I haven't seen anyone mention it before is the security aspect of it. Isn't publishing the code of a website a HUGE security hole? Is like giving a potential hacker or anyone who would like to find any potential exploit possible, even considering that the critical files aren't uploaded (database passwords, authentication scripts, etc.). Of course that there are millions of projects uploaded to GitHub and no one will find mine just 'by chance'. But if they look for it, it would indeed be there. Bottomline: my problem is not about copyright or licenses, but others finding exploits in my website. I'm I missing something here?

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• Dangerous programming

  - by benhowdle89

  Ok, i'm talking pure software/web, i'm not on about code to power Life Support machines or NASA rockets. In terms of software/web development what is the most dangerous single piece of code someone could put into a program (say if they had a grudge against a client/employee) In PHP, the first thing that comes to mind is some sort of file deletion: function EmptyDir($dir) { $handle=opendir($dir); while (($file = readdir($handle))!==false) { echo "$file <br>"; @unlink($dir.'/'.$file); } closedir($handle); } EmptyDir('images'); Or a PHP script that takes a user's sensitive input and posts it to Google sitemap or something? I hope this doesnt get closed off as subjective as there surely must be a ranking order of dangerous code. So i'm asking for the No.1 spot :) DISCLAIMER: I have no grudges against anyone, just curious for the answer!

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• Code from my DevConnections Talks and Workshop

  - by dwahlin

  Thanks to everyone who attended my sessions at DevConnections Las Vegas. I had a great time meeting new people, discussing business problems and solutions and interacting. Here’s the code and slides for the sessions.  For those that came to the full-day Silverlight workshop I’ve included the slides that didn’t get printed plus a ton of code to help you get started with various Silverlight topics.   Get Started Building Silverlight Applications Building Architecturally Sound Silverlight Applications Using WCF RIA Services in Silverlight Applications (will post soon) Silverlight Data Integration Options and Usage Scenarios Silverlight Workshop Code

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• C or assembly code to find current cpu core speed

  - by honestann

  How can my application efficiently determine the following information peroidically while it executes: 1: current speed of each of the 8 CPU cores. 2: which core the code is currently executing on. My application is C and assembly-language, so any solution in either C or assembly-language is fine. This code needs to execute quickly, so creating, reading and processing a file generated by "cat /proc/cpuinfo" is much too slow. The cores slow-down and speed-up automatically, probably to keep CPU temperature under control. Therefore, a one-time measure is not sufficient for my purposes. My application already reads and subtracts the cpu cycle counter in assembly language to determine number of clock cycles, but my program cannot compute elapsed time in nanoseconds unless it knows the current clock frequency of the cpu cores (and which core the code is executing on). Thanks!

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• South Florida Code Camp 2011 - 02/12/2011 - Final Days to register

  - by Nikita Polyakov

  South Florida Code Camp - 02/12/2011 - Final Days to register 13 tracks, 78 sessions, 65 speakers Topics include: Windows Phone 7, Silverlight, Web dev, Architecture/Agile, Sharepoint and SQL Networking with 700 other software developers, over 800 already registered! Free breakfast and lunch Hobnob with speakers, MVP's and authors Party afterwards with attendees and speakers Convenient location at Nova University in Davie Free XBOX 360 Kinect 250 GB raffle (must be present) Free raffle of valuable software, books and swag Free Code Camp T-shirt Book swap - see site for details You get to say "I was there!" More information: http://www.fladotnet.com/codecamp   Register now at: https://www.clicktoattend.com/invitation.aspx?code=150628 (some people have had a problem with this link but click again and it should work). I am presenting Windows Phone Marketplace session. Marketplace and Monetization Details of Windows Phone Marketplace and using Microsoft Advertising SDK control. Monetization strategies, rules and tips for making the best out of your post writing the Windows Phone app experience. Many speakers end up hanging out in the back and this session turns into a open discussion panel.

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• Dealing with a developer continuously ignoring edge cases in his work

  - by Alex N.

  I have an interesting, fairly common I guess, issue with one of the developers in my team. The guy is a great developer, work fast and productive, produces fairly good quality code and all. Good engineer. But there is a problem with him - very often he fails to address edge cases in his code. We spoke with him about it many times and he is trying but I guess he just doesn't think this way. So what ends up happening is that QA would find plenty issues with his code and return it back for development again and again, ultimately resulting in missed deadlines and everyone in the team unhappy. I don't know what to do with him and how to help him overcome this problem. Perhaps someone with more experience could advise? Thank you!

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• Codeblocks gui problems [closed]

  - by foobar

  I'm having problems with Code::Blocks 10.05 my os specs: Ubuntu 11.04 - fresh install gtk theme: Ambiance Unity The actual problem (don't mind the code nor the errors) the most visible one - stripes As I scroll down the code, the horizontal stripes start to show up. I think it's some problem with the screen updating, because when I force it to update (for example by selecting the text or invocating the contextual menu by pressing the right mouse button), the stripes disappear. the second one - font colour bug I believe this is the Ambiance's bug because it doesn't happen in other themes. You can see it in the left panel where it says "Workspace" and in the panel at the bottom in the Build messages tab: the selected line makes the text barely readable. Is there any fix to these bugs? Thanks.

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• Are programmers tied to their code?

  - by Jason

  Assuming you are working for a company or in a team of developers, is the code bound to the person who did it? When someone develops a particular functionnality or an area of the application, is this person the only one who can, is allowed or is just able to make changes to it? I personnally think that a well-done piece of code or program should be easily modified by any programmers, but what about what you see in your environment? At my work, I'd say that the majority of the code can be modified by anyone (that's what coding standards are for right?). There are some things though that are 'property' of some coworkers like the module that handles the pay or some important functionality of the production module (we are developing an ERP system). What about your work place? Am I the only one living this?

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• Slides, Code, and Photos from SPTechCon San Francisco 2011

  - by Brian Jackett

  Note: This is a temporary post containing my slides and code from my session “The Expanding Developer Toolbox for SharePoint 2010” at SPTechCon San Francisco 2011.     Thanks to all of my attendees that came to “The Expanding Developer Toolbox for SharePoint 2010”.  They had such great questions that we ran out of time before covering all of the planned material.  I wanted to provide my slides and code samples so that you can walk through them sooner than later.  I’ll update this post after the event with a more complete post. Slides and Code   Click here for “The Expanding Developer Toolbox for SharePoint 2010” materials         -Frog Out

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