Static probing

[Eric Badger]

You must have DTrace generate a .o file to provide the missing function. Something like:

dtrace -h -s provider.d
cc -c dtracetest.c -o dtracetest.o
dtrace -G -s provider.d dtracetest.o
cc dtracetest.o provider.o -o dtracetest -lelf

The standard makefile bsd.prog.mk also knows how to handle .d files in the SRCS list and will take care of things for you.

Eric
________________________________________
From: Mikael Östlund <mikael.ostlund.93 at gmail.com>
Sent: Wednesday, June 03, 2015 3:17 AM
To: freebsd-dtrace at freebsd.org
Subject: Static probing

Hello,

I'm experimenting with DTrace on my system and I'm not able to use static
probing in my code.

Here's my c code:

#include "provider.h"

int main(void) {
  TESTPROVIDER_TEST_START("hello");
  return (0);
}

And here's my provider.d file:

provider testprovider {
    probe test__start(char *);
    probe test__done(char *);
};

This is the error message I get when I try to compile my c file:

# gcc dtracetest.c
/tmp//ccjWNu6v.o: In function `main':
dtracetest.c:(.text+0xa): undefined reference to
`__dtrace_testprovider___test__start'
collect2: error: ld returned 1 exit status

(Same message no matter what compiler I try), any ideas?
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