vmmap_macos.c

#include <stdio.h>
#include <stdlib.h>
#include <mach/mach.h>
#include <mach/mach_vm.h>

void print_protection(vm_prot_t prot) {
    printf("%c%c%c",
           (prot & VM_PROT_READ) ? 'r' : '-',
           (prot & VM_PROT_WRITE) ? 'w' : '-',
           (prot & VM_PROT_EXECUTE) ? 'x' : '-');
}

int main(int argc, char *argv[]) {
    if (argc != 2) {
        fprintf(stderr, "Usage: %s <pid>\n", argv[0]);
        return 1;
    }

    pid_t pid = atoi(argv[1]);
    task_t task;

    kern_return_t kr = task_for_pid(mach_task_self(), pid, &task);
    if (kr != KERN_SUCCESS) {
        fprintf(stderr, "task_for_pid failed: %s\n", mach_error_string(kr));
        return 1;
    }

    mach_vm_address_t address = 0;
    while (1) {
        mach_vm_size_t size;
        vm_region_basic_info_data_64_t basic_info;
        mach_port_t object_name;
        mach_msg_type_number_t count = VM_REGION_BASIC_INFO_COUNT_64;

        kr = mach_vm_region(task, &address, &size, VM_REGION_BASIC_INFO,
                            (vm_region_info_t)&basic_info, &count, &object_name);
        if (kr != KERN_SUCCESS) break;

        vm_region_extended_info_data_t ext_info;
        mach_msg_type_number_t ext_count = VM_REGION_EXTENDED_INFO_COUNT;
        kr = mach_vm_region(task, &address, &size, VM_REGION_EXTENDED_INFO,
                            (vm_region_info_t)&ext_info, &ext_count, &object_name);

        int user_tag = -1, share_mode = -1;
        if (kr == KERN_SUCCESS) {
            user_tag = ext_info.user_tag;
            share_mode = ext_info.share_mode;
        }

        printf("Region: 0x%llx - 0x%llx, size: 0x%llx, prot: ",
               address, address + size, size);
        print_protection(basic_info.protection);
        printf(", user_tag: %d, share_mode: %d, shared: %d\n", user_tag, share_mode, basic_info.shared);

        address += size;
    }

    return 0;
}