I've a Go function that wraps the proc_name(pid,...) function from lib_proc.h.
This is the complete C prototype:
int proc_name(int pid, void * buffer, uint32_t buffersize) __OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_2_0);
that can be found here /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk/usr/include/libproc.h (at least on my system).
It follows Go code:
package goproc
/*
#include "libproc.h"
int call_proc_name(int pid, char *name, int name_size) {
return proc_name(pid, name, name_size);
}
*/
import "C"
import "unsafe"
import "strings"
type DarwinProcess struct {
Process
}
func (DarwinProcess) NameOf(pid int) string {
name := C.CString(strings.Repeat("\x00", 1024))
defer C.free(unsafe.Pointer(name))
nameLen := C.call_proc_name(C.int(pid), name, C.int(1024))
var result string
if (nameLen > 0) {
result = C.GoString(name);
} else {
result = ""
}
return result;
}
This code won't compile unless the call to C.free(unsafe.Pointer(...)) and import "unsafe" clause are removed.
DarwinProcess::NameOf(pid) method is meant to work only on Mac OS X and it actually works if C.free(...) is removed from code.
In its actual form after go build I get the following error message:
could not determine kind of name for C.free (and nothing more, this is the whole compiler output).
Removing C.free(...) is not acceptable to me, I must find how to properly free the memory allocated with C.CString().
I'm puzzled since, according to documentation, everything is done properly. I have not been able to find a solution nor searching here nor on the web.
