95 lines
1.9 KiB
C
95 lines
1.9 KiB
C
/* (c) 2007,2008 Andrei Nigmatulin */
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#include "fpm_config.h"
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#include <mach/mach.h>
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#include <mach/mach_vm.h>
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#include <unistd.h>
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#include "fpm_trace.h"
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#include "fpm_process_ctl.h"
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#include "fpm_unix.h"
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#include "zlog.h"
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static mach_port_name_t target;
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static vm_offset_t target_page_base;
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static vm_offset_t local_page;
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static mach_msg_type_number_t local_size;
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static void fpm_mach_vm_deallocate(void)
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{
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if (local_page) {
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mach_vm_deallocate(mach_task_self(), local_page, local_size);
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target_page_base = 0;
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local_page = 0;
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local_size = 0;
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}
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}
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static int fpm_mach_vm_read_page(vm_offset_t page) /* {{{ */
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{
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kern_return_t kr;
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kr = mach_vm_read(target, page, fpm_pagesize, &local_page, &local_size);
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if (kr != KERN_SUCCESS) {
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zlog(ZLOG_ERROR, "failed to read vm page: mach_vm_read(): %s (%d)", mach_error_string(kr), kr);
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return -1;
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}
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return 0;
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}
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/* }}} */
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int fpm_trace_signal(pid_t pid) /* {{{ */
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{
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if (0 > fpm_pctl_kill(pid, FPM_PCTL_STOP)) {
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zlog(ZLOG_SYSERROR, "failed to send SIGSTOP to %d", pid);
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return -1;
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}
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return 0;
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}
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/* }}} */
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int fpm_trace_ready(pid_t pid) /* {{{ */
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{
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kern_return_t kr;
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kr = task_for_pid(mach_task_self(), pid, &target);
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if (kr != KERN_SUCCESS) {
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char *msg = "";
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if (kr == KERN_FAILURE) {
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msg = " It seems that master process does not have enough privileges to trace processes.";
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}
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zlog(ZLOG_ERROR, "task_for_pid() failed: %s (%d)%s", mach_error_string(kr), kr, msg);
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return -1;
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}
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return 0;
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}
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/* }}} */
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int fpm_trace_close(pid_t pid) /* {{{ */
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{
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fpm_mach_vm_deallocate();
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target = 0;
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return 0;
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}
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/* }}} */
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int fpm_trace_get_long(long addr, long *data) /* {{{ */
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{
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size_t offset = ((uintptr_t) (addr) % fpm_pagesize);
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vm_offset_t base = (uintptr_t) (addr) - offset;
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if (base != target_page_base) {
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fpm_mach_vm_deallocate();
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if (0 > fpm_mach_vm_read_page(base)) {
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return -1;
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}
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}
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*data = * (long *) (local_page + offset);
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return 0;
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}
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/* }}} */
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