Some Erlang struct sizes

port_sz.c

#include "config.h"
#include "sys.h"
#include "erl_process.h"
#include "big.h"
#include "erl_binary.h"

/* Compile x86_64 after bootstrap from $(ERL_TOP)/erts/emulator with:
 * 
 *   gcc -g -O3 -fomit-frame-pointer                                     \
 *   -I../x86_64-unknown-linux-gnu                                       \
 *   -fno-tree-copyrename -D_GNU_SOURCE -DHAVE_CONFIG_H -Wall            \
 *   -Wstrict-prototypes -Wmissing-prototypes                            \
 *   -Wdeclaration-after-statement -DUSE_THREADS -D_THREAD_SAFE          \
 *   -D_REENTRANT -DPOSIX_THREADS -D_POSIX_THREAD_SAFE_FUNCTIONS         \
 *   -Ix86_64-unknown-linux-gnu/opt/plain -Ibeam -Isys/unix -Isys/common \
 *   -Ix86_64-unknown-linux-gnu -Izlib -Ipcre -Ihipe                     \
 *   -I../include                                                        \
 *   -I../include/x86_64-unknown-linux-gnu                               \
 *   -I../include/internal                                               \
 *   -I../include/internal/x86_64-unknown-linux-gnu beam/port_sz.c       \
 *   -o beam/port_sz
 */
int main(int argc, char **argv)
{
  printf("sizeof(Port) = %ld\n", sizeof(Port));
  printf("sizeof(Process) = %ld\n", sizeof(Process));
  printf("sizeof(Atom) = %ld\n", sizeof(Atom));
  return 0;
}