Hi Frank,
Thanks for the point!
Regards.
On 2020-07-16 06:19, Frank Ch. Eigler wrote:
Hi -
If you can afford a more invasive tool, that requires a lot of
memory and stops your application for quite some time, you can look
at approaches like dyninst that decompile the binary, insert
instrumentation code and reassemble the code.
https://dyninst.org/
For the record, systemtap includes a backend that uses dyninst as a
pure userspace backend.
% cat foo.c
#include <stdio.h>
int foo() {
printf("foo\n");
return 1;
}
int main() {
foo();
}
% gcc -g foo.c
% stap --runtime=dyninst -e '
probe process.function("*").{call,return} { println(pp()) }
' -c a.out
foo
process("/home/fche/a.out").function("main@/home/fche/foo.c:8").call
process("/home/fche/a.out").function("foo@/home/fche/foo.c:3").call
process("/home/fche/a.out").function("foo@/home/fche/foo.c:3").return
process("/home/fche/a.out").function("main@/home/fche/foo.c:8").return
- FChE
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