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d8f60c8112
Chromium moved base::size() to base/cxx17_backports.h, so do the same in mini_chromium and update the users in Crashpad. Roll mini_chromium to 2f06f83f to make the new base header available. Bug: chromium:1210983 Change-Id: Ie3dc4c189dcdfcac030b95fe285f94abb29a27bf Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/2917779 Commit-Queue: Lei Zhang <thestig@chromium.org> Commit-Queue: Mark Mentovai <mark@chromium.org> Reviewed-by: Mark Mentovai <mark@chromium.org>
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
// Copyright 2018 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "snapshot/fuchsia/memory_map_region_snapshot_fuchsia.h"
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#include "base/check_op.h"
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#include "base/cxx17_backports.h"
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namespace crashpad {
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namespace internal {
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namespace {
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// Maps from bitwise OR of Zircon's flags to enumerated Windows version.
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uint32_t MmuFlagsToProtectFlags(zx_vm_option_t flags) {
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// These bits are currently the lowest 3 of zx_vm_option_t. They're used to
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// index into a mapping array, so make sure that we notice if they change
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// values.
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static_assert(
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ZX_VM_PERM_READ == 1 && ZX_VM_PERM_WRITE == 2 && ZX_VM_PERM_EXECUTE == 4,
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"table below will need fixing");
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// The entries set to zero don't have good corresponding Windows minidump
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// names. They also aren't currently supported by the mapping syscall on
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// Zircon, so DCHECK that they don't happen in practice. EXECUTE-only also
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// cannot currently happen, but as that has a good mapping to the Windows
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// value, leave it in place in case it's supported by the syscall in the
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// future.
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static constexpr uint32_t mapping[] = {
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/* --- */ PAGE_NOACCESS,
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/* --r */ PAGE_READONLY,
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/* -w- */ 0,
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/* -wr */ PAGE_READWRITE,
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/* x-- */ PAGE_EXECUTE,
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/* x-r */ PAGE_EXECUTE_READ,
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/* xw- */ 0,
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/* xwr */ PAGE_EXECUTE_READWRITE,
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};
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const uint32_t index =
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flags & (ZX_VM_PERM_READ | ZX_VM_PERM_WRITE | ZX_VM_PERM_EXECUTE);
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DCHECK_LT(index, base::size(mapping));
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const uint32_t protect_flags = mapping[index];
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DCHECK_NE(protect_flags, 0u);
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return protect_flags;
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}
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} // namespace
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MemoryMapRegionSnapshotFuchsia::MemoryMapRegionSnapshotFuchsia(
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const zx_info_maps_t& info_map)
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: memory_info_() {
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DCHECK_EQ(info_map.type, ZX_INFO_MAPS_TYPE_MAPPING);
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memory_info_.BaseAddress = info_map.base;
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memory_info_.AllocationBase = info_map.base;
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memory_info_.RegionSize = info_map.size;
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memory_info_.State = MEM_COMMIT;
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memory_info_.Protect = memory_info_.AllocationProtect =
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MmuFlagsToProtectFlags(info_map.u.mapping.mmu_flags);
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memory_info_.Type = MEM_MAPPED;
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}
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MemoryMapRegionSnapshotFuchsia::~MemoryMapRegionSnapshotFuchsia() {}
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const MINIDUMP_MEMORY_INFO&
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MemoryMapRegionSnapshotFuchsia::AsMinidumpMemoryInfo() const {
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return memory_info_;
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}
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} // namespace internal
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} // namespace crashpad
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