weaver | Trace Go program execution with uprobes and eBPF | Monitoring library
kandi X-RAY | weaver Summary
kandi X-RAY | weaver Summary
PLEASE READ! - I am currently refactoring Weaver to use libbpf instead of bcc which would include various other major improvements. If you're currently using weaver please be aware that features/bug fixes are being held off until the major refactor occurs. This will be tracked in the branch "refactor". Weaver is a CLI tool that allows you to trace Go programs in order to inspect what values are passed to specified functions. It leverages eBPF attached to uprobes.
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Community Discussions
Trending Discussions on weaver
QUESTION
I'm calling a paginated API and storing the data of different pages into separate files. The two files are added below.
file1.json
...ANSWER
Answered 2021-May-25 at 13:19You can use extend
to extend a list with another list:
QUESTION
I have an old Java6 Application, and I'm trying to add some automatic and global log for tracing every call in every method. It runs on a JBoss 4.2.3.
I follow this example : https://docs.spring.io/spring-framework/docs/current/reference/html/core.html#aop-aj-ltw-first-example
I have my profiling class :
...ANSWER
Answered 2021-May-02 at 10:24I am not a Spring user, but when answering AspectJ LTW questions here I often noticed a certain discrepancy between the Spring documentation mentioning the need for the Spring Instrument Java agent only and the real situation in which there are ways to configure Spring like that, but it is tricky. The simplest approach by far is to also add the AspectJ Weaver agent to the command line, i.e. to use something like (on a single line, of course)
QUESTION
I am new in python and REST world.
My Python script
...ANSWER
Answered 2021-Apr-28 at 18:07A simple change in your for iteration would help:
QUESTION
following are my files for html, .ts and json . As json data was very extensive therefore i have just added a few states and their cities. my 1st dropdown is showing all states. Now I want to match my 1st dropdown's selected value of state with a key "state" in "cities" object in my json file so i can populate 2nd dropdown with cities relevant to that state. and I want to do this in function "getCitiesForSelectedState". please help me find solution for this.
//.ts file
...ANSWER
Answered 2021-Apr-27 at 16:44You can do it with the $event
parameter.
Make sure to compare your values safely.
If your value is not in the right type or has spaces or unwanted chars, this c.state == val
might not work.
You can use the trim
function to compare your value safely:
c.state.trim() == val.trim()
HTML
QUESTION
I'm attempting to inject a context for tracing into newly created Callable objects using @Around advice:
...ANSWER
Answered 2021-Apr-21 at 18:03Firstly, you cannot replace a returned object from within the constructor execution()
, because a constructor is not a normal method which could e.g. have a supertype or interface as return type. A constructor always returns exactly the object of the defined type, nothing else. This is not even an AspectJ limitation but a JVM limitation. With a byte code engineering library such as ASM you would have the same limitation.
So the best you can do in AspectJ is to replace the returned object in the constructor call()
, but the object must also match the expected type. Unfortunately, OpenTelemetry returns a lambda instance which cannot be cast to the exact anonymous Callable
subtype you have in your code. This means, there is nothing you can do here with that kind of code structure.
As a workaround, you can intercept calls to methods taking Callable
instances, such as ExecutorService.submit(Callable)
. You just need to make sure to capture all relevant ones. For example:
QUESTION
I'm trying to use AspectJ in a simple java app, without using of Spring. project is controlled by maven.
Here is the project code, you can see it also on a GitHub
App.java
...ANSWER
Answered 2021-Apr-17 at 04:55A simple solution/workaround was to add aspectj-maven-plugin
for compile-time weaving(in this case aop.xml
file is not needed anymore)
and package projects with its dependencies in to executable jar using maven-assembly-plugin
(there are other ways also to package executable jars with libs/dependencies)
pom.xml
QUESTION
I'm trying to apply a cross cutting concern which is logging with AspectJ and a test framework called Katalon which uses Groovy and Java. I found that the best weaving type appropriate here is load-time weaving which requires a META-INF folder and an Aop.xml. I tried to put my aop.xml in multiple places but I think aspectj is unable to find it. This is the structure of my project:
Here is my aop.xml file content:
...ANSWER
Answered 2021-Apr-13 at 06:54My first guess, not having seen your real project, is that you should move the weaver options out of the aspect declaration section like this:
QUESTION
I am sorry if this is really basic question I am just starting out with programming I have looked up online couldn't find anything to solve this issue. while running my program I encountered this message "what(): std::bad_alloc" this is the first time ever for me, the program will run 2 out 5 times and for the rest I get this error in console. I don't know if something is wrong with my system or code. I really appreciate any feedback.
here is the code I am trying to write function for sorting and searching.
...ANSWER
Answered 2021-Mar-24 at 06:29Your program is throwing an std::bad_alloc
exception at some point and, since your are not handling this exception, it halts. This is due to some flaw on memory management.
Check your bubble-sort algorithm. Specifically, the for
loop:
QUESTION
I am trying to build a POC project using AspectJ
without using Spring AOP
. I am using an annotation based approach where I want to run the aspect @Around
the method which has been annotated with an annotation. For some reason my aspects don't get triggered. Below is my code:
pom.xml
...ANSWER
Answered 2021-Mar-23 at 15:26You are using AspectJ Maven Plugin, i.e. you are going to use compile-time weaving. Therefore, you do not need aop.xml because that one is used for load-time weaving. So you can delete it.
During compilation you should get a compile error:
QUESTION
I tried all ways to display data from the database (Firebase realtime database) There're following config rules:
...ANSWER
Answered 2021-Mar-05 at 07:07Your "data" is an object of JSON, but not an array.
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Install weaver
make will compile the weaver binary to bin/weaver (It also creates the smoke test binary and print-stack utility).
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