Is there a way to write debug registers directly in ndk?

[Gleb Igumnov]

Hello, I have following problem: I need to set CPU debug registers manualy in my program, to create data breakpoint each time, my string is allocated. My bug is super-cryptic and obscure and it appears only on android, so I don't have any conventional debug methods left.

I've found article, that says that it can be done with ptrace api, using PT_SETDBREGS command and struct dbreg. But I can't find neither in ndk headers.

Is there any way to do it in ndk?

[Dan Albert]

afaict that constant is part of BSD ptrace, not Linux ptrace.

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[enh]

yeah, that's spelled differently in Linux land. you should probably check out something like the source to lldb for full details of hardware watchpoints, but here's a simple example from one of the bionic tests: https://android.googlesource.com/platform/bionic/+/master/tests/sys_ptrace_test.cpp#110

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