/fpm/fpm_trace_mach.c
C | 102 lines | 72 code | 28 blank | 2 comment | 11 complexity | db8dee392b65c1c2ca4129cc0bf39301 MD5 | raw file
- /* $Id: fpm_trace_mach.c,v 1.4 2008/08/26 15:09:15 anight Exp $ */
- /* (c) 2007,2008 Andrei Nigmatulin */
- #include "fpm_config.h"
- #include <mach/mach.h>
- #include <mach/mach_vm.h>
- #include <unistd.h>
- #include "fpm_trace.h"
- #include "fpm_process_ctl.h"
- #include "fpm_unix.h"
- #include "zlog.h"
- static mach_port_name_t target;
- static vm_offset_t target_page_base;
- static vm_offset_t local_page;
- static mach_msg_type_number_t local_size;
- static void fpm_mach_vm_deallocate()
- {
- if (local_page) {
- mach_vm_deallocate(mach_task_self(), local_page, local_size);
- target_page_base = 0;
- local_page = 0;
- local_size = 0;
- }
- }
- static int fpm_mach_vm_read_page(vm_offset_t page)
- {
- kern_return_t kr;
- kr = mach_vm_read(target, page, fpm_pagesize, &local_page, &local_size);
- if (kr != KERN_SUCCESS) {
- zlog(ZLOG_STUFF, ZLOG_ERROR, "mach_vm_read() failed: %s (%d)", mach_error_string(kr), kr);
- return -1;
- }
- return 0;
- }
- int fpm_trace_signal(pid_t pid)
- {
- if (0 > fpm_pctl_kill(pid, FPM_PCTL_STOP)) {
- zlog(ZLOG_STUFF, ZLOG_SYSERROR, "kill(SIGSTOP) failed");
- return -1;
- }
- return 0;
- }
- int fpm_trace_ready(pid_t pid)
- {
- kern_return_t kr;
- kr = task_for_pid(mach_task_self(), pid, &target);
- if (kr != KERN_SUCCESS) {
- char *msg = "";
- if (kr == KERN_FAILURE) {
- msg = " It seems that master process does not have enough privileges to trace processes.";
- }
- zlog(ZLOG_STUFF, ZLOG_ERROR, "task_for_pid() failed: %s (%d)%s", mach_error_string(kr), kr, msg);
- return -1;
- }
- return 0;
- }
- int fpm_trace_close(pid_t pid)
- {
- fpm_mach_vm_deallocate();
- target = 0;
- return 0;
- }
- int fpm_trace_get_long(long addr, long *data)
- {
- size_t offset = ((uintptr_t) (addr) % fpm_pagesize);
- vm_offset_t base = (uintptr_t) (addr) - offset;
- if (base != target_page_base) {
- fpm_mach_vm_deallocate();
- if (0 > fpm_mach_vm_read_page(base)) {
- return -1;
- }
- }
- *data = * (long *) (local_page + offset);
- return 0;
- }