CODEWITHSUNDEEP
pointersstringdtrace
Tadeusz A. Kadłubowski
Tadeusz A. Kadłubowski

Reputation: 8345

How to get a string from memory into DTrace script

I have a char* in my DTrace script that I know points to a zero-terminated string. How to access this string?

Is there some function like copyin() that handles zero-terminated strings?

Upvotes: 1

Views: 740

Answers (1)

Tadeusz A. Kadłubowski
Tadeusz A. Kadłubowski

Reputation: 8345

copyinstr() does exactly that. It accepts a pointer as a parameter, treats it as a pointer to zero-terminated string and returns a copy of that string in kernel memory accessible by the script.

Note that unlike C, DTrace has a string type. copyinstr() returns that type.

See Sun's Solaris Dynamic Tracing Guide

Upvotes: 1

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