How do I get LOAD_CLASSDEREF instruction after dis.dis?

How do I get LOAD_CLASSDEREF instruction after dis.dis?

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How do I get LOAD_CLASSDEREF instruction after dis.dis?
Tag : python , By : Adam May
Date : January 11 2021, 03:34 PM

should help you out LOAD_CLASSDEREF is used for when a class body accesses a closure variable, so have a class body access a closure variable:
def foo():
    x = 3
    class Bar:

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Find which assembly instruction caused an Illegal Instruction error without debugging

Tag : c , By : eataix
Date : March 29 2020, 07:55 AM
this will help Actually often you get an illegal instruction error not because your program contain an illegal opcode but because there is a bug in your program (e.g., a buffer overflow) that makes your program jumps in a random address with plain data or in code but not in the start of the opcode.

How can I write a single instruction to switch two values into a variable every time the instruction is being executed?

Tag : c , By : Sergio Rudenko
Date : March 29 2020, 07:55 AM
like below fixes the issue I'd like to write a single instruction to switch two values into a variable at every instruction execution; this is the generic case: having two values x1, x2 and i initialized to x1 or x2, switch i value between x1 and x2 at every instruction execution, i.e. i= x1, x2, x1 ...; or, if i is initialized to x2, i = x2, x1, x2, ...; , This is what you are looking for?

llvm - get the first instruction of the basic block referred to in the label field of instruction of type br

Tag : development , By : Mighty Mac
Date : March 29 2020, 07:55 AM
around this issue Call ->getOperand(1) and ->getOperand(2) methods for that instruction. This would give you 1st and 2nd BB respectively. See http://llvm.org/doxygen/classllvm_1_1User.html#abe1de1520a21f77ac57cc210bf0fb0b4

Translate Instruction Pointer Address (in shared library) to Source Instruction

Tag : c , By : arcadian
Date : March 29 2020, 07:55 AM
it should still fix some issue I found a way to do this with GDB:
Interactive: $ gdb --pid 1566 (gdb) info symbol 0x7fe28b8a2b79 pselect + 89 in section .text of /lib/x86_64-linux-gnu/libc.so.6 (gdb) info symbol 0x5612550f14a4 copy_word_list + 20 in section .text of /usr/bin/bash (gdb) info symbol 0x7fe28b878947 execve + 7 in section .text of /lib/x86_64-linux-gnu/libc.so.6 Shows exactly what I wanted!

Whats the difference between a normal instruction and a fast instruction in java (e.g. aload and fast_aload)

Tag : java , By : Dov
Date : December 27 2020, 04:51 PM
With these it helps I printed out the executed bytecodes of a simple java program and noticed that some java instructions are fast_xxxx instead of the normal instruction. ,
So what exactly is the difference between these instructions?
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