b9c1b51e45
*** to conform to clang-format’s LLVM style. This kind of mass change has
*** two obvious implications:
Firstly, merging this particular commit into a downstream fork may be a huge
effort. Alternatively, it may be worth merging all changes up to this commit,
performing the same reformatting operation locally, and then discarding the
merge for this particular commit. The commands used to accomplish this
reformatting were as follows (with current working directory as the root of
the repository):
find . \( -iname "*.c" -or -iname "*.cpp" -or -iname "*.h" -or -iname "*.mm" \) -exec clang-format -i {} +
find . -iname "*.py" -exec autopep8 --in-place --aggressive --aggressive {} + ;
The version of clang-format used was 3.9.0, and autopep8 was 1.2.4.
Secondly, “blame” style tools will generally point to this commit instead of
a meaningful prior commit. There are alternatives available that will attempt
to look through this change and find the appropriate prior commit. YMMV.
llvm-svn: 280751
189 lines
7.0 KiB
C++
189 lines
7.0 KiB
C++
//===-- MachVMRegion.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 "MachVMRegion.h"
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#include "DNBLog.h"
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#include <assert.h>
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#include <mach/mach_vm.h>
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MachVMRegion::MachVMRegion(task_t task)
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: m_task(task), m_addr(INVALID_NUB_ADDRESS), m_err(),
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m_start(INVALID_NUB_ADDRESS), m_size(0), m_depth(-1),
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m_curr_protection(0), m_protection_addr(INVALID_NUB_ADDRESS),
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m_protection_size(0) {
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memset(&m_data, 0, sizeof(m_data));
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}
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MachVMRegion::~MachVMRegion() {
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// Restore any original protections and clear our vars
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Clear();
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}
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void MachVMRegion::Clear() {
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RestoreProtections();
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m_addr = INVALID_NUB_ADDRESS;
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m_err.Clear();
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m_start = INVALID_NUB_ADDRESS;
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m_size = 0;
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m_depth = -1;
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memset(&m_data, 0, sizeof(m_data));
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m_curr_protection = 0;
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m_protection_addr = INVALID_NUB_ADDRESS;
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m_protection_size = 0;
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}
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bool MachVMRegion::SetProtections(mach_vm_address_t addr, mach_vm_size_t size,
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vm_prot_t prot) {
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if (ContainsAddress(addr)) {
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mach_vm_size_t prot_size = size;
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mach_vm_address_t end_addr = EndAddress();
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if (prot_size > (end_addr - addr))
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prot_size = end_addr - addr;
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if (prot_size > 0) {
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if (prot == (m_curr_protection & VM_PROT_ALL)) {
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DNBLogThreadedIf(LOG_MEMORY_PROTECTIONS | LOG_VERBOSE,
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"MachVMRegion::%s: protections (%u) already "
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"sufficient for task 0x%4.4x at address 0x%8.8llx) ",
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__FUNCTION__, prot, m_task, (uint64_t)addr);
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// Protections are already set as requested...
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return true;
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} else {
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m_err = ::mach_vm_protect(m_task, addr, prot_size, 0, prot);
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if (DNBLogCheckLogBit(LOG_MEMORY_PROTECTIONS))
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m_err.LogThreaded("::mach_vm_protect ( task = 0x%4.4x, addr = "
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"0x%8.8llx, size = %llu, set_max = %i, prot = %u )",
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m_task, (uint64_t)addr, (uint64_t)prot_size, 0,
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prot);
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if (m_err.Fail()) {
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// Try again with the ability to create a copy on write region
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m_err = ::mach_vm_protect(m_task, addr, prot_size, 0,
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prot | VM_PROT_COPY);
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if (DNBLogCheckLogBit(LOG_MEMORY_PROTECTIONS) || m_err.Fail())
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m_err.LogThreaded("::mach_vm_protect ( task = 0x%4.4x, addr = "
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"0x%8.8llx, size = %llu, set_max = %i, prot = %u "
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")",
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m_task, (uint64_t)addr, (uint64_t)prot_size, 0,
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prot | VM_PROT_COPY);
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}
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if (m_err.Success()) {
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m_curr_protection = prot;
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m_protection_addr = addr;
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m_protection_size = prot_size;
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return true;
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}
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}
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} else {
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DNBLogThreadedIf(LOG_MEMORY_PROTECTIONS | LOG_VERBOSE,
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"%s: Zero size for task 0x%4.4x at address 0x%8.8llx) ",
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__FUNCTION__, m_task, (uint64_t)addr);
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}
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}
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return false;
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}
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bool MachVMRegion::RestoreProtections() {
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if (m_curr_protection != m_data.protection && m_protection_size > 0) {
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m_err = ::mach_vm_protect(m_task, m_protection_addr, m_protection_size, 0,
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m_data.protection);
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if (DNBLogCheckLogBit(LOG_MEMORY_PROTECTIONS) || m_err.Fail())
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m_err.LogThreaded("::mach_vm_protect ( task = 0x%4.4x, addr = 0x%8.8llx, "
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"size = %llu, set_max = %i, prot = %u )",
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m_task, (uint64_t)m_protection_addr,
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(uint64_t)m_protection_size, 0, m_data.protection);
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if (m_err.Success()) {
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m_protection_size = 0;
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m_protection_addr = INVALID_NUB_ADDRESS;
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m_curr_protection = m_data.protection;
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return true;
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}
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} else {
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m_err.Clear();
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return true;
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}
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return false;
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}
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bool MachVMRegion::GetRegionForAddress(nub_addr_t addr) {
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// Restore any original protections and clear our vars
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Clear();
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m_err.Clear();
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m_addr = addr;
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m_start = addr;
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m_depth = 1024;
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mach_msg_type_number_t info_size = kRegionInfoSize;
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assert(sizeof(info_size) == 4);
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m_err =
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::mach_vm_region_recurse(m_task, &m_start, &m_size, &m_depth,
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(vm_region_recurse_info_t)&m_data, &info_size);
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const bool failed = m_err.Fail();
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const bool log_protections = DNBLogCheckLogBit(LOG_MEMORY_PROTECTIONS);
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if (log_protections || failed)
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m_err.LogThreaded("::mach_vm_region_recurse ( task = 0x%4.4x, address => "
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"0x%8.8llx, size => %llu, nesting_depth => %d, info => "
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"%p, infoCnt => %d) addr = 0x%8.8llx ",
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m_task, (uint64_t)m_start, (uint64_t)m_size, m_depth,
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&m_data, info_size, (uint64_t)addr);
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if (failed)
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return false;
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if (log_protections) {
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DNBLogThreaded("info = { prot = %u, "
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"max_prot = %u, "
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"inheritance = 0x%8.8x, "
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"offset = 0x%8.8llx, "
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"user_tag = 0x%8.8x, "
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"ref_count = %u, "
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"shadow_depth = %u, "
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"ext_pager = %u, "
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"share_mode = %u, "
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"is_submap = %d, "
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"behavior = %d, "
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"object_id = 0x%8.8x, "
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"user_wired_count = 0x%4.4x }",
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m_data.protection, m_data.max_protection, m_data.inheritance,
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(uint64_t)m_data.offset, m_data.user_tag, m_data.ref_count,
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m_data.shadow_depth, m_data.external_pager,
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m_data.share_mode, m_data.is_submap, m_data.behavior,
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m_data.object_id, m_data.user_wired_count);
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}
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m_curr_protection = m_data.protection;
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// We make a request for an address and got no error back, but this
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// doesn't mean that "addr" is in the range. The data in this object will
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// be valid though, so you could see where the next region begins. So we
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// return false, yet leave "m_err" with a successfull return code.
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if ((addr < m_start) || (addr >= (m_start + m_size)))
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return false;
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return true;
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}
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uint32_t MachVMRegion::GetDNBPermissions() const {
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if (m_addr == INVALID_NUB_ADDRESS || m_start == INVALID_NUB_ADDRESS ||
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m_size == 0)
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return 0;
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uint32_t dnb_permissions = 0;
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if ((m_data.protection & VM_PROT_READ) == VM_PROT_READ)
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dnb_permissions |= eMemoryPermissionsReadable;
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if ((m_data.protection & VM_PROT_WRITE) == VM_PROT_WRITE)
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dnb_permissions |= eMemoryPermissionsWritable;
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if ((m_data.protection & VM_PROT_EXECUTE) == VM_PROT_EXECUTE)
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dnb_permissions |= eMemoryPermissionsExecutable;
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return dnb_permissions;
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}
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