298 lines
11 KiB
C++
298 lines
11 KiB
C++
//===-- MachVMMemory.cpp ----------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Created by Greg Clayton on 6/26/07.
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//
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//===----------------------------------------------------------------------===//
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#include "MachVMMemory.h"
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#include "DNBLog.h"
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#include "MachVMRegion.h"
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#include <dlfcn.h>
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#include <mach/mach_vm.h>
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#include <mach/shared_region.h>
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#include <sys/sysctl.h>
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#if defined(WITH_FBS) || defined(WITH_BKS)
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extern "C" {
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#import <sys/kern_memorystatus.h>
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}
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#endif
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static const vm_size_t kInvalidPageSize = ~0;
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MachVMMemory::MachVMMemory() : m_page_size(kInvalidPageSize), m_err(0) {}
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MachVMMemory::~MachVMMemory() {}
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nub_size_t MachVMMemory::PageSize(task_t task) {
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if (m_page_size == kInvalidPageSize) {
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#if defined(TASK_VM_INFO) && TASK_VM_INFO >= 22
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if (task != TASK_NULL) {
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kern_return_t kr;
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mach_msg_type_number_t info_count = TASK_VM_INFO_COUNT;
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task_vm_info_data_t vm_info;
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kr = task_info(task, TASK_VM_INFO, (task_info_t)&vm_info, &info_count);
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if (kr == KERN_SUCCESS) {
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DNBLogThreadedIf(
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LOG_TASK,
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"MachVMMemory::PageSize task_info returned page size of 0x%x",
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(int)vm_info.page_size);
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m_page_size = vm_info.page_size;
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return m_page_size;
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} else {
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DNBLogThreadedIf(LOG_TASK, "MachVMMemory::PageSize task_info call "
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"failed to get page size, TASK_VM_INFO %d, "
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"TASK_VM_INFO_COUNT %d, kern return %d",
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TASK_VM_INFO, TASK_VM_INFO_COUNT, kr);
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}
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}
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#endif
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m_err = ::host_page_size(::mach_host_self(), &m_page_size);
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if (m_err.Fail())
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m_page_size = 0;
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}
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return m_page_size;
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}
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nub_size_t MachVMMemory::MaxBytesLeftInPage(task_t task, nub_addr_t addr,
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nub_size_t count) {
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const nub_size_t page_size = PageSize(task);
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if (page_size > 0) {
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nub_size_t page_offset = (addr % page_size);
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nub_size_t bytes_left_in_page = page_size - page_offset;
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if (count > bytes_left_in_page)
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count = bytes_left_in_page;
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}
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return count;
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}
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nub_bool_t MachVMMemory::GetMemoryRegionInfo(task_t task, nub_addr_t address,
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DNBRegionInfo *region_info) {
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MachVMRegion vmRegion(task);
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if (vmRegion.GetRegionForAddress(address)) {
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region_info->addr = vmRegion.StartAddress();
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region_info->size = vmRegion.GetByteSize();
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region_info->permissions = vmRegion.GetDNBPermissions();
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} else {
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region_info->addr = address;
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region_info->size = 0;
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if (vmRegion.GetError().Success()) {
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// vmRegion.GetRegionForAddress() return false, indicating that "address"
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// wasn't in a valid region, but the "vmRegion" info was successfully
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// read from the task which means the info describes the next valid
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// region from which we can infer the size of this invalid region
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mach_vm_address_t start_addr = vmRegion.StartAddress();
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if (address < start_addr)
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region_info->size = start_addr - address;
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}
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// If we can't get any info about the size from the next region it means
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// we asked about an address that was past all mappings, so the size
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// of this region will take up all remaining address space.
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if (region_info->size == 0)
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region_info->size = INVALID_NUB_ADDRESS - region_info->addr;
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// Not readable, writeable or executable
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region_info->permissions = 0;
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}
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return true;
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}
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static uint64_t GetPhysicalMemory() {
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// This doesn't change often at all. No need to poll each time.
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static uint64_t physical_memory = 0;
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static bool calculated = false;
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if (calculated)
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return physical_memory;
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size_t len = sizeof(physical_memory);
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sysctlbyname("hw.memsize", &physical_memory, &len, NULL, 0);
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calculated = true;
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return physical_memory;
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}
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nub_bool_t MachVMMemory::GetMemoryProfile(
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DNBProfileDataScanType scanType, task_t task, struct task_basic_info ti,
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cpu_type_t cputype, nub_process_t pid, vm_statistics64_data_t &vminfo,
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uint64_t &physical_memory, uint64_t &anonymous,
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uint64_t &phys_footprint, uint64_t &memory_cap)
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{
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if (scanType & eProfileHostMemory)
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physical_memory = GetPhysicalMemory();
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if (scanType & eProfileMemory) {
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static mach_port_t localHost = mach_host_self();
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mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
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host_statistics64(localHost, HOST_VM_INFO64, (host_info64_t)&vminfo,
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&count);
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kern_return_t kr;
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mach_msg_type_number_t info_count;
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task_vm_info_data_t vm_info;
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info_count = TASK_VM_INFO_COUNT;
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kr = task_info(task, TASK_VM_INFO_PURGEABLE, (task_info_t)&vm_info, &info_count);
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if (kr == KERN_SUCCESS) {
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if (scanType & eProfileMemoryAnonymous) {
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anonymous = vm_info.internal + vm_info.compressed - vm_info.purgeable_volatile_pmap;
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}
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phys_footprint = vm_info.phys_footprint;
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}
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}
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#if defined(WITH_FBS) || defined(WITH_BKS)
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if (scanType & eProfileMemoryCap) {
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memorystatus_memlimit_properties_t memlimit_properties;
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memset(&memlimit_properties, 0, sizeof(memlimit_properties));
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if (memorystatus_control(MEMORYSTATUS_CMD_GET_MEMLIMIT_PROPERTIES, pid, 0, &memlimit_properties, sizeof(memlimit_properties)) == 0) {
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memory_cap = memlimit_properties.memlimit_active;
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}
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}
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#endif
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return true;
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}
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nub_size_t MachVMMemory::Read(task_t task, nub_addr_t address, void *data,
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nub_size_t data_count) {
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if (data == NULL || data_count == 0)
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return 0;
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nub_size_t total_bytes_read = 0;
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nub_addr_t curr_addr = address;
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uint8_t *curr_data = (uint8_t *)data;
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while (total_bytes_read < data_count) {
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mach_vm_size_t curr_size =
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MaxBytesLeftInPage(task, curr_addr, data_count - total_bytes_read);
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mach_msg_type_number_t curr_bytes_read = 0;
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vm_offset_t vm_memory = 0;
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m_err = ::mach_vm_read(task, curr_addr, curr_size, &vm_memory,
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&curr_bytes_read);
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if (DNBLogCheckLogBit(LOG_MEMORY))
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m_err.LogThreaded("::mach_vm_read ( task = 0x%4.4x, addr = 0x%8.8llx, "
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"size = %llu, data => %8.8p, dataCnt => %i )",
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task, (uint64_t)curr_addr, (uint64_t)curr_size,
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vm_memory, curr_bytes_read);
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if (m_err.Success()) {
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if (curr_bytes_read != curr_size) {
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if (DNBLogCheckLogBit(LOG_MEMORY))
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m_err.LogThreaded(
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"::mach_vm_read ( task = 0x%4.4x, addr = 0x%8.8llx, size = %llu, "
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"data => %8.8p, dataCnt=>%i ) only read %u of %llu bytes",
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task, (uint64_t)curr_addr, (uint64_t)curr_size, vm_memory,
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curr_bytes_read, curr_bytes_read, (uint64_t)curr_size);
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}
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::memcpy(curr_data, (void *)vm_memory, curr_bytes_read);
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::vm_deallocate(mach_task_self(), vm_memory, curr_bytes_read);
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total_bytes_read += curr_bytes_read;
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curr_addr += curr_bytes_read;
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curr_data += curr_bytes_read;
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} else {
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break;
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}
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}
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return total_bytes_read;
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}
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nub_size_t MachVMMemory::Write(task_t task, nub_addr_t address,
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const void *data, nub_size_t data_count) {
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MachVMRegion vmRegion(task);
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nub_size_t total_bytes_written = 0;
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nub_addr_t curr_addr = address;
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const uint8_t *curr_data = (const uint8_t *)data;
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while (total_bytes_written < data_count) {
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if (vmRegion.GetRegionForAddress(curr_addr)) {
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mach_vm_size_t curr_data_count = data_count - total_bytes_written;
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mach_vm_size_t region_bytes_left = vmRegion.BytesRemaining(curr_addr);
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if (region_bytes_left == 0) {
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break;
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}
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if (curr_data_count > region_bytes_left)
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curr_data_count = region_bytes_left;
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if (vmRegion.SetProtections(curr_addr, curr_data_count,
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VM_PROT_READ | VM_PROT_WRITE)) {
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nub_size_t bytes_written =
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WriteRegion(task, curr_addr, curr_data, curr_data_count);
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if (bytes_written <= 0) {
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// Status should have already be posted by WriteRegion...
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break;
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} else {
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total_bytes_written += bytes_written;
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curr_addr += bytes_written;
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curr_data += bytes_written;
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}
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} else {
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DNBLogThreadedIf(
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LOG_MEMORY_PROTECTIONS, "Failed to set read/write protections on "
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"region for address: [0x%8.8llx-0x%8.8llx)",
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(uint64_t)curr_addr, (uint64_t)(curr_addr + curr_data_count));
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break;
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}
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} else {
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DNBLogThreadedIf(LOG_MEMORY_PROTECTIONS,
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"Failed to get region for address: 0x%8.8llx",
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(uint64_t)address);
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break;
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}
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}
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return total_bytes_written;
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}
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nub_size_t MachVMMemory::WriteRegion(task_t task, const nub_addr_t address,
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const void *data,
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const nub_size_t data_count) {
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if (data == NULL || data_count == 0)
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return 0;
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nub_size_t total_bytes_written = 0;
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nub_addr_t curr_addr = address;
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const uint8_t *curr_data = (const uint8_t *)data;
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while (total_bytes_written < data_count) {
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mach_msg_type_number_t curr_data_count =
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static_cast<mach_msg_type_number_t>(MaxBytesLeftInPage(
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task, curr_addr, data_count - total_bytes_written));
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m_err =
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::mach_vm_write(task, curr_addr, (pointer_t)curr_data, curr_data_count);
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if (DNBLogCheckLogBit(LOG_MEMORY) || m_err.Fail())
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m_err.LogThreaded("::mach_vm_write ( task = 0x%4.4x, addr = 0x%8.8llx, "
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"data = %8.8p, dataCnt = %u )",
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task, (uint64_t)curr_addr, curr_data, curr_data_count);
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#if !defined(__i386__) && !defined(__x86_64__)
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vm_machine_attribute_val_t mattr_value = MATTR_VAL_CACHE_FLUSH;
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m_err = ::vm_machine_attribute(task, curr_addr, curr_data_count,
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MATTR_CACHE, &mattr_value);
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if (DNBLogCheckLogBit(LOG_MEMORY) || m_err.Fail())
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m_err.LogThreaded("::vm_machine_attribute ( task = 0x%4.4x, addr = "
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"0x%8.8llx, size = %u, attr = MATTR_CACHE, mattr_value "
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"=> MATTR_VAL_CACHE_FLUSH )",
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task, (uint64_t)curr_addr, curr_data_count);
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#endif
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if (m_err.Success()) {
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total_bytes_written += curr_data_count;
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curr_addr += curr_data_count;
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curr_data += curr_data_count;
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} else {
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break;
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}
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}
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return total_bytes_written;
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}
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