ProfBuffer
process_pcsamples((ProfBuffer *) objp);
ProfBuffer prof_buffer;
if (fwrite(&prof_buffer, sizeof (ProfBuffer), 1, fp) != 1) {
process_pcsamples(ProfBuffer *bufp)
#define PROFBUF_SZ (CEIL(sizeof (ProfBuffer), STRUCT_ALIGN))
#define BUF_FILLER (PROFBUF_SZ - sizeof (ProfBuffer))