truss | Truss helps you build go | REST library
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kandi X-RAY | truss Summary
Truss handles the painful parts of services, freeing you to focus on the business logic.
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QUESTION
Recently I was playing with freebsd system calls I had no problem for i386 part since its well documented at here. But i can't find same document for x86_64.
I saw people are using same way like on linux but they use just assembly not c. I suppose in my case system call actually changing some register which is used by high optimization level so it gives different behaviour.
...ANSWER
Answered 2021-Mar-31 at 21:36Here's a test framework to work with. It is [loosely] modeled on a H/W logic analyzer and/or things like dtrace.
It will save registers before and after the syscall instruction in a large global buffer.
After the loop terminates it will dump out a trace of all the register values that were stored.
It is multiple files. To extract:
- save the code below to a file (e.g.
/tmp/archive). - Create a directory: (e.g.)
/tmp/extract - cd to
/tmp/extract. - Then do:
perl /tmp/archive -go. - It will create some subdirectories:
/tmp/extract/syscalland/tmp/extract/snapliband store a few files there. - cd to the program target directory (e.g.)
cd /tmp/extract/syscall - build with:
make - Then, run with:
./syscall
Here is the file:
Edit: I've added a check for overflow of the snaplist buffer in the snapnow function. If the buffer is full, dumpall is called automatically. This is good in general but also necessary if the loop in main never terminates (i.e. without the check the post loop dump would never occur)
Edit: And, I've added optional "x86_64 red zone" support
QUESTION
I am trying to use the input fields to change certain values of an equation in order to give a resultant angle. I have managed to select the default values and log the answer to the console however when i try to change the values nothing changes?
My end goal is to have an app where you can input these 3 values and hit "submit" and then it will output the answer on the screen. So for the default values it will output "The Angle is: 36.92°"
...ANSWER
Answered 2020-Nov-03 at 15:45A couple of changes:
Firstly, add a
Secondly, put the code of the js file inside of a function called getResult().
Thirdly, in the html file, call the getResult() function as the onclick event of the input. The "onclick" attribute in the "input" tag links your button to the javascript function so that it will be called whenever the button is clicked.
Lastly, add document.getElementById("theAnswer").innerHTML = result; to the end of the getResult() function so that it will update the innerHTML of the
See below changes:
html file:QUESTION
I am making a react app where I need to populate dynamic checkboxes from the data.
...ANSWER
Answered 2020-Oct-29 at 08:03You have no need to create another array with checked items. Just change your input like-
QUESTION
In my simple JS application I am in the need to display the data in an order.
The flow:
User choose sectors first, So we have Sector data based on user selection like,
...ANSWER
Answered 2020-Oct-13 at 11:59QUESTION
I am having two arrays, One is departments and another is jobtitles
ANSWER
Answered 2020-Oct-12 at 11:58Just use filter instead of find and flatMap instead of map:
QUESTION
I wanted to plot forces in a truss system (f) and give them color based on their magnitude. So I plot these lines based on their node coordinates and give them a color using seismic colormap. Whilst I figured out how to assign the corresponding color I'm not able to plot a colorbar on the side. How can I add this?
...ANSWER
Answered 2020-Aug-17 at 18:06To create a custom colorbar, a ScalarMappable should be created using the same colormap and norm:
QUESTION
How do i center the very last image to align with middle column. All images are 300 * 100. Also, how do i make them stack on top of each other on screen size reducing? The bottom image keeps going to the right of the second row, and on resizing only columns one is visible, all other disappear. Please help
...ANSWER
Answered 2020-May-26 at 21:09Add justify-content: center to your .row class. Is that what you're looking for?
QUESTION
On old SystemV Unix using the "truss" program(is similar to strace)
...ANSWER
Answered 2020-May-11 at 01:09Current versions of Linux provide a system call named clone(2) (see https://linux.die.net/man/2/clone and scroll down to the description of sys_clone), which is a general system call for creating new tasks. There are options to determine exactly what resources the new task should share with its parent (memory, file descriptors, etc), so that the system call can be used to create new processes or new threads or anything in between. Although the kernel still provides a fork system call for backward compatibility, current versions of glibc implement fork() in terms of clone(2) instead.
Thus, even though you may see a call to fork() in the source code of sh, the output of strace will show a clone system call. So you should look for that instead of fork.
QUESTION
I am trying to run the code below to visualize stresses on a truss but I am getting an error.I am using vtk 8.2.0 and after googling the error I found solutions to lower versions (below 8.2) so they couldnt work.The code is below.Please someone help me removing this error.
...ANSWER
Answered 2020-Mar-25 at 16:45They changed the interface of VTK 6. SetInput was replaced with SetInputConnection and SetInputData. You can read about it here:
https://vtk.org/Wiki/VTK/VTK_6_Migration/Replacement_of_SetInput
So you want to change your code to:
QUESTION
i have a truss bridge that i want to draw using fortran 90 and Gnuplot , but the truss elements should change color if the corresponding array element is bigger or smaller than zero
...ANSWER
Answered 2020-Feb-07 at 17:58It is not clear what exactly you mean by x(1) > 0 since there is no function x() defined. Assuming that x(1) means data value in column 1, then instead of
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Install truss
Install protoc 3 or newer. The easiest way is to download a release from github and add to $PATH. Otherwise install from source.
Install Truss with go get -u -d github.com/metaverse/truss cd $GOPATH/src/github.com/metaverse/truss make dependencies make On Windows, do the following instead: go get -u -d github.com/metaverse/truss cd %GOPATH%/src/github.com/metaverse/truss wininstall.bat
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