This content originally appeared on CodeSource.io and was authored by Deven
In this article, you will learn how to solve program received signal sigsegv: segmentation fault – invalid memory reference.
Let’s look at a code example that produces the same error.
CnewV = CnewV + alpha2 * r
Segmentation error happens because of memory conflicts. and in our case error is due to wrong allocation of variables. Consider the code snippet below to correctly allocate the variables.
CnewV(0:IG,0:JG) = CnewV(0:IG,0:JG) + alpha2 * r(0:IG,0:JG)
If an array index is being outside the declared range It can also cause segmentation fault error.
There are few other reasons which can produce the above error:
- Your integers with
INTEGER*8might be too long, maybeINTEGER*4or simplyINTEGERwould be better - You call
SGESVon double arguments instead ofDGESV - Your
LDAargument is missing, so your code should perhaps look likeCALL DGESV(N,N,DMA2,N,pivot,FU,N,inf)but you need to check whether this is what you want.
To solve this issue you should use iostat=<some integer var> to check for the return value of the open operation.
The post Solved – program received signal sigsegv: segmentation fault appeared first on CodeSource.io.
This content originally appeared on CodeSource.io and was authored by Deven
Deven | Sciencx (2021-03-08T11:52:57+00:00) Solved – program received signal sigsegv: segmentation fault. Retrieved from https://www.scien.cx/2021/03/08/solved-program-received-signal-sigsegv-segmentation-fault/
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