Equivalent of 'int 3' on ARM/iOS processors

Question

I'm looking for an equivalent of

__asm__ int 3

for ARM/iOS processors for when I'm debugging on a physical device. Is it BKPT? All I want to do is halt the processor so that I can then step past or continue execution at that point like I can with an int 3.

score 9 · Accepted Answer · edited May 23 '17 at 12:32

9

According to an answer for the question Breaking into the debugger on iPhone the equivalent is asm("trap"). But see the other answers for different techniques.

Especially look into conditional breakpoints which is a less invasive method.

edited May 23 '17 at 12:32

Community

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answered Feb 11 '11 at 15:38

DarkDust

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For some reason, the linker barfs on not being able to resolve 'asm()'. – rforte Feb 11 '11 at 16:33
Try `__asm__("trap");` (that's two underscores at each side). – DarkDust Feb 11 '11 at 16:39

score 6 · Answer 2 · answered Aug 11 '20 at 13:16

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When dealing with macOS ARM:

Clang's __builtin_debugtrap(); function should generate necessary break instruction.
If that won't work, try asm("brk #0x1");

answered Aug 11 '20 at 13:16

antonone

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Equivalent of 'int 3' on ARM/iOS processors

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