Add compat to Crashpad

compat/non_win/dbghelp.h

+// Copyright 2014 The Crashpad Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef CRASHPAD_COMPAT_NON_WIN_DBGHELP_H_
+#define CRASHPAD_COMPAT_NON_WIN_DBGHELP_H_
+
+#include <stdint.h>
+
+#include "base/strings/string16.h"
+#include "compat/non_win/timezoneapi.h"
+#include "compat/non_win/verrsrc.h"
+#include "compat/non_win/winnt.h"
+
+//! \file
+
+//! \brief The magic number for a minidump file, stored in
+//!     MINIDUMP_HEADER::Signature.
+//!
+//! A hex dump of a little-endian minidump file will begin with the string
+//! “MDMP”.
+#define MINIDUMP_SIGNATURE ('PMDM')  // 0x4d444d50
+
+//! \brief The version of a minidump file, stored in MINIDUMP_HEADER::Version.
+#define MINIDUMP_VERSION (42899)
+
+//! \brief An offset within a minidump file, relative to the start of its
+//!     MINIDUMP_HEADER.
+//!
+//! RVA stands for “relative virtual address”. Within a minidump file, RVAs are
+//! used as pointers to link structures together.
+//!
+//! \sa MINIDUMP_LOCATION_DESCRIPTOR
+typedef uint32_t RVA;
+
+//! \brief A pointer to a structure or union within a minidump file.
+struct __attribute__((packed, aligned(4))) MINIDUMP_LOCATION_DESCRIPTOR {
+  //! \brief The size of the referenced structure or union, in bytes.
+  uint32_t DataSize;
+
+  //! \brief The relative virtual address of the structure or union within the
+  //!     minidump file.
+  RVA Rva;
+};
+
+//! \brief A pointer to a snapshot of a region of memory contained within a
+//!     minidump file.
+//!
+//! \sa MINIDUMP_MEMORY_LIST
+struct __attribute__((packed, aligned(4))) MINIDUMP_MEMORY_DESCRIPTOR {
+  //! \brief The base address of the memory region in the address space of the
+  //!     process that the minidump file contains a snapshot of.
+  uint64_t StartOfMemoryRange;
+
+  //! \brief The contents of the memory region.
+  MINIDUMP_LOCATION_DESCRIPTOR Memory;
+};
+
+//! \brief The top-level structure identifying a minidump file.
+//!
+//! This structure contains a pointer to the stream directory, a second-level
+//! structure which in turn contains pointers to third-level structures
+//! (“streams”) containing the data within the minidump file. This structure
+//! also contains the minidump file’s magic numbers, and other bookkeeping data.
+//!
+//! This structure must be present at the beginning of a minidump file (at ::RVA
+//! 0).
+struct __attribute__((packed, aligned(4))) MINIDUMP_HEADER {
+  //! \brief The minidump file format magic number, ::MINIDUMP_SIGNATURE.
+  uint32_t Signature;
+
+  //! \brief The minidump file format version number, ::MINIDUMP_VERSION.
+  uint32_t Version;
+
+  //! \brief The number of MINIDUMP_DIRECTORY elements present in the directory
+  //!     referenced by #StreamDirectoryRva.
+  uint32_t NumberOfStreams;
+
+  //! \brief A pointer to an array of MINIDUMP_DIRECTORY structures that
+  //!     identify all of the streams within this minidump file. The array has
+  //!     #NumberOfStreams elements present.
+  RVA StreamDirectoryRva;
+
+  //! \brief The minidump file’s checksum. This can be `0`, and in practice, `0`
+  //!     is the only value that has ever been seen in this field.
+  uint32_t CheckSum;
+
+  //! \brief The time that the minidump file was generated, in `time_t` format,
+  //!     the number of seconds since the POSIX epoch.
+  uint32_t TimeDateStamp;
+
+  //! \brief A bitfield containing members of ::MINIDUMP_TYPE, describing the
+  //!     types of data carried within this minidump file.
+  uint64_t Flags;
+};
+
+//! \brief A pointer to a stream within a minidump file.
+//!
+//! Each stream present in a minidump file will have a corresponding
+//! MINIDUMP_DIRECTORY entry in the stream directory referenced by
+//! MINIDUMP_HEADER::StreamDirectoryRva.
+struct __attribute__((packed, aligned(4))) MINIDUMP_DIRECTORY {
+  //! \brief The type of stream referenced, a value of ::MINIDUMP_STREAM_TYPE.
+  uint32_t StreamType;
+
+  //! \brief A pointer to the stream data within the minidump file.
+  MINIDUMP_LOCATION_DESCRIPTOR Location;
+};
+
+//! \brief A variable-length UTF-16-encoded string carried within a minidump
+//!     file.
+//!
+//! The UTF-16 string is stored as UTF-16LE or UTF-16BE according to the byte
+//! ordering of the minidump file itself.
+//!
+//! \sa crashpad::MinidumpUTF8String
+struct __attribute__((packed, aligned(4))) MINIDUMP_STRING {
+  //! \brief The length of the #Buffer field in bytes, not including the `NUL`
+  //!     terminator.
+  //!
+  //! \note This field is interpreted as a byte count, not a count of UTF-16
+  //!     code units or Unicode code points.
+  uint32_t Length;
+
+  //! \brief The string, encoded in UTF-16, and terminated with a UTF-16 `NUL`
+  //!     code unit (two `NUL` bytes).
+  char16 Buffer[0];
+};
+
+//! \brief Minidump stream type values for MINIDUMP_DIRECTORY::StreamType. Each
+//!     stream structure has a corresponding stream type value to identify it.
+//!
+//! \sa crashpad::MinidumpStreamType
+enum MINIDUMP_STREAM_TYPE {
+  //! \brief The stream type for MINIDUMP_THREAD_LIST.
+  ThreadListStream = 3,
+
+  //! \brief The stream type for MINIDUMP_MODULE_LIST.
+  ModuleListStream = 4,
+
+  //! \brief The stream type for MINIDUMP_MEMORY_LIST.
+  MemoryListStream = 5,
+
+  //! \brief The stream type for MINIDUMP_EXCEPTION_STREAM.
+  ExceptionStream = 6,
+
+  //! \brief The stream type for MINIDUMP_SYSTEM_INFO.
+  SystemInfoStream = 7,
+
+  //! \brief The stream type for MINIDUMP_MISC_INFO, MINIDUMP_MISC_INFO_2,
+  //!     MINIDUMP_MISC_INFO_3, and MINIDUMP_MISC_INFO_4.
+  //!
+  //! More recent versions of this stream are supersets of earlier versions.
+  //!
+  //! The exact version of the stream that is present is implied by the stream’s
+  //! size. Furthermore, this stream contains a field,
+  //! MINIDUMP_MISC_INFO_STREAM::Flags1, that indicates which data is present
+  //! and valid.
+  MiscInfoStream = 15,
+};
+
+//! \brief Information about the CPU (or CPUs) that ran the process that the
+//!     minidump file contains a snapshot of.
+//!
+//! This union only appears as MINIDUMP_SYSTEM_INFO::Cpu. Its interpretation is
+//! controlled by MINIDUMP_SYSTEM_INFO::ProcessorArchitecture.
+union __attribute__((packed, aligned(4))) CPU_INFORMATION {
+  //! \brief Information about 32-bit x86 CPUs, or x86_64 CPUs when running
+  //!     32-bit x86 processes.
+  struct __attribute__((packed, aligned(4))) {
+    //! \brief The CPU’s vendor identification string as encoded in `cpuid 0`
+    //!     `ebx`, `edx`, and `ecx`, represented as it appears in these
+    //!     registers.
+    //!
+    //! For Intel CPUs, `[0]` will encode “Genu”, `[1]` will encode “ineI”, and
+    //! `[2]` will encode “ntel”, for a vendor ID string “GenuineIntel”.
+    //!
+    //! \note The Windows documentation incorrectly states that these fields are
+    //!     to be interpreted as `cpuid 0` `eax`, `ebx`, and `ecx`.
+    uint32_t VendorId[3];
+
+    //! \brief Family, model, and stepping ID values as encoded in `cpuid 1`
+    //!     `eax`.
+    uint32_t VersionInformation;
+
+    //! \brief A bitfield containing supported CPU capabilities as encoded in
+    //!     `cpuid 1` `edx`.
+    uint32_t FeatureInformation;
+
+    //! \brief A bitfield containing supported CPU capabalities as encoded in
+    //!     `cpuid 0x80000001` `edx`.
+    //!
+    //! This field is only valid if #VendorId identifies the CPU vendor as
+    //! “AuthenticAMD”.
+    uint32_t AMDExtendedCpuFeatures;
+  } X86CpuInfo;
+
+  //! \brief Information about non-x86 CPUs, and x86_64 CPUs when not running
+  //!     32-bit x86 processes.
+  struct __attribute__((packed, aligned(4))) {
+    //! \brief Bitfields containing supported CPU capabilities as identified by
+    //!     bits corresponding to `PF_*` values passed to
+    //!     `IsProcessorFeaturePresent()`.
+    uint64_t ProcessorFeatures[2];
+  } OtherCpuInfo;
+};
+
+//! \brief Information about the system that hosted the process that the
+//!     minidump file contains a snapshot of.
+struct __attribute__((packed, aligned(4))) MINIDUMP_SYSTEM_INFO {
+  // The next 4 fields are from the SYSTEM_INFO structure returned by
+  // GetSystemInfo().
+
+  //! \brief The system’s CPU architecture. This may be a \ref
+  //!     PROCESSOR_ARCHITECTURE_x "PROCESSOR_ARCHITECTURE_*" value, or a member
+  //!     of crashpad::MinidumpCPUArchitecture.
+  //!
+  //! In some cases, a system may be able to run processes of multiple specific
+  //! architecture types. For example, systems based on 64-bit architectures
+  //! such as x86_64 are often able to run 32-bit code of another architecture
+  //! in the same family, such as 32-bit x86. On these systems, this field will
+  //! identify the architecture of the process that the minidump file contains a
+  //! snapshot of.
+  uint16_t ProcessorArchitecture;
+
+  //! \brief General CPU version information.
+  //!
+  //! The precise interpretation of this field is specific to each CPU
+  //! architecture. For x86-family CPUs (including x86_64 and 32-bit x86), this
+  //! field contains the CPU family ID value from `cpuid 1` `eax`, adjusted to
+  //! take the extended family ID into account.
+  uint16_t ProcessorLevel;
+
+  //! \brief Specific CPU version information.
+  //!
+  //! The precise interpretation of this field is specific to each CPU
+  //! architecture. For x86-family CPUs (including x86_64 and 32-bit x86), this
+  //! field contains values obtained from `cpuid 1` `eax`: the high byte
+  //! contains the CPU model ID value adjusted to take the extended model ID
+  //! into account, and the low byte contains the CPU stepping ID value.
+  uint16_t ProcessorRevision;
+
+  //! \brief The total number of CPUs present in the system.
+  uint8_t NumberOfProcessors;
+
+  // The next 7 fields are from the OSVERSIONINFOEX structure returned by
+  // GetVersionEx().
+
+  //! \brief The system’s operating system type, which distinguishes between
+  //!     “desktop” or “workstation” systems and “server” systems. This may be a
+  //!     \ref VER_NT_x "VER_NT_*" value, or a member of
+  //!     crashpad::MinidumpOSType.
+  uint8_t ProductType;
+
+  //! \brief The system’s operating system version number’s first (major)
+  //!     component.
+  //!
+  //!  - For Windows 7 (NT 6.1) SP1, version 6.1.7601, this would be `6`.
+  //!  - For Mac OS X 10.9.2, this would be `10`.
+  uint32_t MajorVersion;
+
+  //! \brief The system’s operating system version number’s second (minor)
+  //!     component.
+  //!
+  //!  - For Windows 7 (NT 6.1) SP1, version 6.1.7601, this would be `1`.
+  //!  - For Mac OS X 10.9.2, this would be `9`.
+  uint32_t MinorVersion;
+
+  //! \brief The system’s operating system version number’s third (build or
+  //!     patch) component.
+  //!
+  //!  - For Windows 7 (NT 6.1) SP1, version 6.1.7601, this would be `7601`.
+  //!  - For Mac OS X 10.9.2, this would be `2`.
+  uint32_t BuildNumber;
+
+  //! \brief The system’s operating system family. This may be a \ref
+  //!     VER_PLATFORM_x "VER_PLATFORM_*" value, or a member of
+  //!     crashpad::MinidumpOS.
+  uint32_t PlatformId;
+
+  //! \brief ::RVA of a MINIDUMP_STRING containing operating system-specific
+  //!     version information.
+  //!
+  //! This field further identifies an operating system version beyond its
+  //! version number fields. Historically, “CSD” stands for “corrective service
+  //! diskette.”
+  //!
+  //!  - On Windows, this is the name of the installed operating system service
+  //!    pack, such as “Service Pack 1”. If no service pack is installed, this
+  //!    field references an empty string.
+  //!  - On Mac OS X, this is the operating system build number from `sw_vers
+  //!    -buildVersion`. For Mac OS X 10.9.2 on most hardware types, this would
+  //!    be `13C64`.
+  //!  - On Linux and other Unix-like systems, this is the kernel version from
+  //!    `uname -srvm`, possibly with additional information appended. On
+  //!    Android, the `ro.build.fingerprint` system property is appended.
+  RVA CSDVersionRva;
+
+  //! \brief A bitfield identifying products installed on the system. This is
+  //!     composed of \ref VER_SUITE_x "VER_SUITE_*" values.
+  //!
+  //! This field is Windows-specific, and has no meaning on other operating
+  //! systems.
+  uint16_t SuiteMask;
+
+  uint16_t Reserved2;
+
+  //! \brief Information about the system’s CPUs.
+  //!
+  //! This field is a union. Which of its members should be expressed is
+  //! controlled by the #ProcessorArchitecture field. If it is set to
+  //! crashpad::kMinidumpCPUArchitectureX86, the CPU_INFORMATION::X86CpuInfo
+  //! field is expressed. Otherwise, the CPU_INFORMATION::OtherCpuInfo field is
+  //! expressed.
+  //!
+  //! \note Older Breakpad implementations produce minidump files that express
+  //!     CPU_INFORMATION::X86CpuInfo when #ProcessorArchitecture is set to
+  //!     crashpad::kMinidumpCPUArchitectureAMD64. Minidump files produced by
+  //!     `dbghelp.dll` on Windows express CPU_INFORMATION::OtherCpuInfo in this
+  //!     case.
+  CPU_INFORMATION Cpu;
+};
+
+//! \brief Information about a specific thread within the process.
+//!
+//! \sa MINIDUMP_THREAD_LIST
+struct __attribute__((packed, aligned(4))) MINIDUMP_THREAD {
+  //! \brief The thread’s ID. This may be referenced by
+  //!     MINIDUMP_EXCEPTION_STREAM::ThreadId.
+  uint32_t ThreadId;
+
+  //! \brief The thread’s suspend count.
+  //!
+  //! This field will be `0` if the thread is schedulable (not suspended).
+  uint32_t SuspendCount;
+
+  //! \brief The thread’s priority class.
+  //!
+  //! On Windows, this is a `*_PRIORITY_CLASS` value. `NORMAL_PRIORITY_CLASS`
+  //! has value `0x20`; higher priority classes have higher values.
+  uint32_t PriorityClass;
+
+  //! \brief The thread’s priority level.
+  //!
+  //! On Windows, this is a `THREAD_PRIORITY_*` value. `THREAD_PRIORITY_NORMAL`
+  //! has value `0`; higher priorities have higher values, and lower priorities
+  //! have lower (negative) values.
+  uint32_t Priority;
+
+  //! \brief The address of the thread’s thread environment block in the address
+  //!     space of the process that the minidump file contains a snapshot of.
+  //!
+  //! The thread environment block contains thread-local data.
+  //!
+  //! A MINIDUMP_MEMORY_DESCRIPTOR may be present in the MINIDUMP_MEMORY_LIST
+  //! stream containing the thread-local data pointed to by this field.
+  uint64_t Teb;
+
+  //! \brief A snapshot of the thread’s stack.
+  //!
+  //! A MINIDUMP_MEMORY_DESCRIPTOR may be present in the MINIDUMP_MEMORY_LIST
+  //! stream containing a pointer to the same memory range referenced by this
+  //! field.
+  MINIDUMP_MEMORY_DESCRIPTOR Stack;
+
+  //! \brief A pointer to a CPU-specific CONTEXT structure containing the
+  //!     thread’s context at the time the snapshot was taken.
+  //!
+  //! If the minidump file was generated as a result of an exception taken on
+  //! this thread, this field may identify a different context than the
+  //! exception context. For these minidump files, a MINIDUMP_EXCEPTION_STREAM
+  //! stream will be present, and the context contained within that stream will
+  //! be the exception context.
+  //!
+  //! The interpretation of the context structure is dependent on the CPU
+  //! architecture identified by MINIDUMP_SYSTEM_INFO::ProcessorArchitecture.
+  //! For crashpad::kMinidumpCPUArchitectureX86, this will be
+  //! crashpad::MinidumpContextX86. For crashpad::kMinidumpCPUArchitectureAMD64,
+  //! this will be crashpad::MinidumpContextAMD64.
+  MINIDUMP_LOCATION_DESCRIPTOR ThreadContext;
+};
+
+//! \brief Information about all threads within the process.
+struct __attribute__((packed, aligned(4))) MINIDUMP_THREAD_LIST {
+  //! \brief The number of threads present in the #Threads array.
+  uint32_t NumberOfThreads;
+
+  //! \brief Structures identifying each thread within the process.
+  MINIDUMP_THREAD Threads[0];
+};
+
+//! \brief Information about an exception that occurred in the process.
+struct __attribute__((packed, aligned(4))) MINIDUMP_EXCEPTION {
+  //! \brief The top-level exception code identifying the exception, in
+  //!     operating system-specific values.
+  //!
+  //! For Mac OS X minidumps, this will be a value of
+  //! crashpad::MinidumpExceptionCodeMac, which corresponds to an `EXC_*`
+  //! exception type. `EXC_CRASH` will not appear here for exceptions processed
+  //! as `EXC_CRASH` when generated from another preceding exception: the
+  //! original exception code will appear instead. The exception type as it was
+  //! received will appear at index 0 of #ExceptionInformation.
+  //!
+  //! \note This field is named ExceptionCode, but what is known as the
+  //!     “exception code” on Mac OS X/Mach is actually stored in the
+  //!     #ExceptionFlags field of a minidump file.
+  //!
+  //! \todo Document the possible values by OS. There should be OS-specific
+  //!     enums in minidump_extensions.h.
+  uint32_t ExceptionCode;
+
+  //! \brief Additional exception flags that further identify the exception, in
+  //!     operating system-specific values.
+  //!
+  //! For Mac OS X minidumps, this will be the value of the exception code at
+  //! index 0 as received by a Mach exception handler. For exception type
+  //! `EXC_CRASH` generated from another preceding exception, the original
+  //! exception code will appear here, not the code as received by the Mach
+  //! exception handler. The code as it was received will appear at index 1 of
+  //! #ExceptionInformation.
+  //!
+  //! \todo Document the possible values by OS. There should be OS-specific
+  //!     enums in minidump_extensions.h.
+  uint32_t ExceptionFlags;
+
+  //! \brief An address, in the address space of the process that this minidump
+  //!     file contains a snapshot of, of another MINIDUMP_EXCEPTION. This field
+  //!     is used for nested exceptions.
+  uint64_t ExceptionRecord;
+
+  //! \brief The address that caused the exception.
+  //!
+  //! This may be the address that caused a fault on data access, or it may be
+  //! the instruction pointer that contained an offending instruction.
+  uint64_t ExceptionAddress;
+
+  //! \brief The number of valid elements in #ExceptionInformation.
+  uint32_t NumberParameters;
+
+  uint32_t __unusedAlignment;
+
+  //! \brief Additional information about the exception, specific to the
+  //!     operating system and possibly the #ExceptionCode.
+  //!
+  //! For Mac OS X minidumps, this will contain the exception type as received
+  //! by a Mach exception handler and the values of the `codes[0]` and
+  //! `codes[1]` (exception code and subcode) parameters supplied to the Mach
+  //! exception handler. Unlike #ExceptionCode and #ExceptionFlags, the values
+  //! received by a Mach exception handler are used directly here even for the
+  //! `EXC_CRASH` exception type.
+  uint64_t ExceptionInformation[EXCEPTION_MAXIMUM_PARAMETERS];
+};
+
+//! \brief Information about the exception that triggered a minidump file’s
+//!     generation.
+struct __attribute__((packed, aligned(4))) MINIDUMP_EXCEPTION_STREAM {
+  //! \brief The ID of the thread that caused the exception.
+  //!
+  //! \sa MINIDUMP_THREAD::ThreadId
+  uint32_t ThreadId;
+
+  uint32_t __alignment;
+
+  //! \brief Information about the exception.
+  MINIDUMP_EXCEPTION ExceptionRecord;
+
+  //! \brief A pointer to a CPU-specific CONTEXT structure containing the
+  //!     thread’s context at the time the exception was caused.
+  //!
+  //! The interpretation of the context structure is dependent on the CPU
+  //! architecture identified by MINIDUMP_SYSTEM_INFO::ProcessorArchitecture.
+  //! For crashpad::kMinidumpCPUArchitectureX86, this will be
+  //! crashpad::MinidumpContextX86. For crashpad::kMinidumpCPUArchitectureAMD64,
+  //! this will be crashpad::MinidumpContextAMD64.
+  MINIDUMP_LOCATION_DESCRIPTOR ThreadContext;
+};
+
+//! \brief Information about a specific module loaded within the process at the
+//!     time the snapshot was taken.
+//!
+//! A module may be the main executable, a shared library, or a loadable module.
+//!
+//! \sa MINIDUMP_MODULE_LIST
+struct __attribute__((packed, aligned(4))) MINIDUMP_MODULE {
+  //! \brief The base address of the loaded module in the address space of the
+  //!     process that the minidump file contains a snapshot of.
+  uint64_t BaseOfImage;
+
+  //! \brief The size of the loaded module.
+  uint32_t SizeOfImage;
+
+  //! \brief The loaded module’s checksum, or `0` if unknown.
+  //!
+  //! On Windows, this field comes from the `CheckSum` field of the module’s
+  //! `IMAGE_OPTIONAL_HEADER` structure, if present. It reflects the checksum at
+  //! the time the module was linked.
+  uint32_t CheckSum;
+
+  //! \brief The module’s timestamp, in `time_t` units, seconds since the POSIX
+  //!     epoch.
+  //!
+  //! On Windows, this field comes from the `TimeDateStamp` field of the
+  //! module’s `IMAGE_HEADER` structure. It reflects the timestamp at the time
+  //! the module was linked.
+  uint32_t TimeDateStamp;
+
+  //! \brief ::RVA of a MINIDUMP_STRING containing the module’s path or file
+  //!     name.
+  RVA ModuleNameRva;
+
+  //! \brief The module’s version information.
+  VS_FIXEDFILEINFO VersionInfo;
+
+  //! \brief A pointer to the module’s CodeView record, typically a link to its
+  //!     debugging information in crashpad::MinidumpModuleCodeViewRecordPDB70
+  //!     format.
+  //!
+  //! The specific format of the CodeView record is indicated by its signature,
+  //! the first 32-bit value in the structure. For links to debugging
+  //! information in contemporary usage, this is normally a
+  //! crashpad::MinidumpModuleCodeViewRecordPDB70 structure, but may be a
+  //! crashpad::MinidumpModuleCodeViewRecordPDB20 structure instead. These
+  //! structures identify a link to debugging data within a `.pdb` (Program
+  //! Database) file. See <a
+  //! href="http://www.debuginfo.com/articles/debuginfomatch.html#pdbfiles">Matching
+  //! Debug Information</a>, PDB Files.
+  //!
+  //! On Windows, it is also possible for the CodeView record to contain
+  //! debugging information itself, as opposed to a link to a `.pdb` file. See
+  //! <a
+  //! href="http://pierrelib.pagesperso-orange.fr/exec_formats/MS_Symbol_Type_v1.0.pdf#page=71">Microsoft
+  //! Symbol and Type Information</a>, section 7.2, “Debug Information Format”
+  //! for a list of debug information formats, and <a
+  //! href="http://undocumented.rawol.com/sbs-w2k-1-windows-2000-debugging-support.pdf#page=63">Undocumented
+  //! Windows 2000 Secrets</a>, Windows 2000 Debugging Support/Microsoft Symbol
+  //! File Internals/CodeView Subsections for an in-depth description of the
+  //! CodeView 4.1 format. Signatures seen in the wild include “NB09”
+  //! (0x3930424e) for CodeView 4.1 and “NB11” (0x3131424e) for CodeView 5.0.
+  //! This form of debugging information within the module, as opposed to a link
+  //! to an external `.pdb` file, is chosen by building with `/Z7`.
+  //!
+  //! On Windows, the CodeView record is taken from a module’s
+  //! IMAGE_DEBUG_DIRECTORY entry whose Type field has the value
+  //! IMAGE_DEBUG_TYPE_CODEVIEW (`2`), if any. Records in
+  //! crashpad::MinidumpModuleCodeViewRecordPDB70 format are generated by Visual
+  //! Studio .NET (2002) (version 7.0) and later.
+  //!
+  //! When the CodeView record is not present, the fields of this
+  //! MINIDUMP_LOCATION_DESCRIPTOR will be `0`.
+  MINIDUMP_LOCATION_DESCRIPTOR CvRecord;
+
+  //! \brief A pointer to the module’s miscellaneous debugging record, a
+  //!     structure of type IMAGE_DEBUG_MISC.
+  //!
+  //! This field is Windows-specific, and has no meaning on other operating
+  //! systems. It is largely obsolete on Windows, where it was used to link to
+  //! debugging information stored in a `.dbg` file. `.dbg` files have been
+  //! superseded by `.pdb` files.
+  //!
+  //! On Windows, the miscellaneous debugging record is taken from module’s
+  //! IMAGE_DEBUG_DIRECTORY entry whose Type field has the value
+  //! IMAGE_DEBUG_TYPE_MISC (`4`), if any.
+  //!
+  //! When the miscellaneous debugging record is not present, the fields of this
+  //! MINIDUMP_LOCATION_DESCRIPTOR will be `0`.
+  //!
+  //! \sa #CvRecord
+  MINIDUMP_LOCATION_DESCRIPTOR MiscRecord;
+
+  uint64_t Reserved0;
+  uint64_t Reserved1;
+};
+
+//! \brief Information about all modules loaded within the process at the time
+//!     the snapshot was taken.
+struct __attribute__((packed, aligned(4))) MINIDUMP_MODULE_LIST {
+  //! \brief The number of modules present in the #Modules array.
+  uint32_t NumberOfModules;
+
+  //! \brief Structures identifying each module present in the minidump file.
+  MINIDUMP_MODULE Modules[0];
+};
+
+//! \brief Information about memory regions within the process.
+//!
+//! Typically, a minidump file will not contain a snapshot of a process’ entire
+//! memory image. For minidump files identified as ::MiniDumpNormal in
+//! MINIDUMP_HEADER::Flags, memory regions are limited to those referenced by
+//! MINIDUMP_THREAD::Stack fields, and a small number of others possibly related
+//! to the exception that triggered the snapshot to be taken.
+struct __attribute__((packed, aligned(4))) MINIDUMP_MEMORY_LIST {
+  //! \brief The number of memory regions present in the #MemoryRanges array.
+  uint32_t NumberOfMemoryRanges;
+
+  //! \brief Structures identifying each memory region present in the minidump
+  //!     file.
+  MINIDUMP_MEMORY_DESCRIPTOR MemoryRanges[0];
+};
+
+//! \anchor MINIDUMP_MISCx
+//! \name MINIDUMP_MISC*
+//!
+//! \brief Field validity flag values for MINIDUMP_MISC_INFO::Flags1.
+//! \{
+
+//! \brief MINIDUMP_MISC_INFO::ProcessId is valid.
+#define MINIDUMP_MISC1_PROCESS_ID 0x00000001
+
+//! \brief The time-related fields in MINIDUMP_MISC_INFO are valid.
+//!
+//! The following fields are valid:
+//!  - MINIDUMP_MISC_INFO::ProcessCreateTime
+//!  - MINIDUMP_MISC_INFO::ProcessUserTime
+//!  - MINIDUMP_MISC_INFO::ProcessKernelTime
+#define MINIDUMP_MISC1_PROCESS_TIMES 0x00000002
+
+//! \brief The CPU-related fields in MINIDUMP_MISC_INFO_2 are valid.
+//!
+//! The following fields are valid:
+//!  - MINIDUMP_MISC_INFO_2::ProcessorMaxMhz
+//!  - MINIDUMP_MISC_INFO_2::ProcessorCurrentMhz
+//!  - MINIDUMP_MISC_INFO_2::ProcessorMhzLimit
+//!  - MINIDUMP_MISC_INFO_2::ProcessorMaxIdleState
+//!  - MINIDUMP_MISC_INFO_2::ProcessorCurrentIdleState
+//!
+//! \note This macro should likely have been named
+//!     MINIDUMP_MISC2_PROCESSOR_POWER_INFO.
+#define MINIDUMP_MISC1_PROCESSOR_POWER_INFO 0x00000004
+
+//! \brief MINIDUMP_MISC_INFO3::ProcessIntegrityLevel is valid.
+#define MINIDUMP_MISC3_PROCESS_INTEGRITY 0x00000010
+
+//! \brief MINIDUMP_MISC_INFO3::ProcessExecuteFlags is valid.
+#define MINIDUMP_MISC3_PROCESS_EXECUTE_FLAGS 0x00000020
+
+//! \brief The time zone-related fields in MINIDUMP_MISC_INFO_3 are valid.
+//!
+//! The following fields are valid:
+//!  - MINIDUMP_MISC_INFO_3::TimeZoneId
+//!  - MINIDUMP_MISC_INFO_3::TimeZone
+#define MINIDUMP_MISC3_TIMEZONE 0x00000040
+
+//! \brief MINIDUMP_MISC_INFO3::ProtectedProcess is valid.
+#define MINIDUMP_MISC3_PROTECTED_PROCESS 0x00000080
+
+//! \brief The build string-related fields in MINIDUMP_MISC_INFO_4 are valid.
+//!
+//! The following fields are valid:
+//!  - MINIDUMP_MISC_INFO_4::BuildString
+//!  - MINIDUMP_MISC_INFO_4::DbgBldStr
+#define MINIDUMP_MISC4_BUILDSTRING 0x00000100
+//! \}
+
+//! \brief Information about the process that the minidump file contains a
+//!     snapshot of, as well as the system that hosted that process.
+//!
+//! \sa \ref MINIDUMP_MISCx "MINIDUMP_MISC*"
+//! \sa MINIDUMP_MISC_INFO_2
+//! \sa MINIDUMP_MISC_INFO_3
+//! \sa MINIDUMP_MISC_INFO_4
+//! \sa MINIDUMP_MISC_INFO_N
+struct __attribute__((packed, aligned(4))) MINIDUMP_MISC_INFO {
+  //! \brief The size of the structure.
+  //!
+  //! This field can be used to distinguish between different versions of this
+  //! structure: MINIDUMP_MISC_INFO, MINIDUMP_MISC_INFO_2, MINIDUMP_MISC_INFO_3,
+  //! and MINIDUMP_MISC_INFO_4.
+  //!
+  //! \sa Flags1
+  uint32_t SizeOfInfo;
+
+  //! \brief A bit field of \ref MINIDUMP_MISCx "MINIDUMP_MISC*" values
+  //!     indicating which fields of this structure contain valid data.
+  uint32_t Flags1;
+
+  //! \brief The process ID of the process.
+  uint32_t ProcessId;
+
+  //! \brief The time that the process started, in `time_t` units, seconds since
+  //!     the POSIX epoch.
+  uint32_t ProcessCreateTime;
+
+  //! \brief The amount of user-mode CPU time used by the process, in seconds,
+  //!     at the time of the snapshot.
+  uint32_t ProcessUserTime;
+
+  //! \brief The amount of system-mode (kernel) CPU time used by the process, in
+  //!     seconds, at the time of the snapshot.
+  uint32_t ProcessKernelTime;
+};
+
+//! \brief Information about the process that the minidump file contains a
+//!     snapshot of, as well as the system that hosted that process.
+//!
+//! This structure variant is used on Windows Vista (NT 6.0) and later.
+//!
+//! \sa \ref MINIDUMP_MISCx "MINIDUMP_MISC*"
+//! \sa MINIDUMP_MISC_INFO
+//! \sa MINIDUMP_MISC_INFO_3
+//! \sa MINIDUMP_MISC_INFO_4
+//! \sa MINIDUMP_MISC_INFO_N
+struct __attribute__((packed, aligned(4))) MINIDUMP_MISC_INFO_2
+    : public MINIDUMP_MISC_INFO {
+  //! \brief The maximum clock rate of the system’s CPU or CPUs, in MHz.
+  uint32_t ProcessorMaxMhz;
+
+  //! \brief The clock rate of the system’s CPU or CPUs, in MHz, at the time of
+  //!     the snapshot.
+  uint32_t ProcessorCurrentMhz;
+
+  //! \brief The maximum clock rate of the system’s CPU or CPUs, in MHz, reduced
+  //!     by any thermal limitations, at the time of the snapshot.
+  uint32_t ProcessorMhzLimit;
+
+  //! \brief The maximum idle state of the system’s CPU or CPUs.
+  uint32_t ProcessorMaxIdleState;
+
+  //! \brief The idle state of the system’s CPU or CPUs at the time of the
+  //!     snapshot.
+  uint32_t ProcessorCurrentIdleState;
+};
+
+//! \brief Information about the process that the minidump file contains a
+//!     snapshot of, as well as the system that hosted that process.
+//!
+//! This structure variant is used on Windows 7 (NT 6.1) and later.
+//!
+//! \sa \ref MINIDUMP_MISCx "MINIDUMP_MISC*"
+//! \sa MINIDUMP_MISC_INFO
+//! \sa MINIDUMP_MISC_INFO_2
+//! \sa MINIDUMP_MISC_INFO_4
+//! \sa MINIDUMP_MISC_INFO_N
+struct __attribute__((packed, aligned(4))) MINIDUMP_MISC_INFO_3
+    : public MINIDUMP_MISC_INFO_2 {
+  //! \brief The process’ integrity level.
+  //!
+  //! Windows typically uses `SECURITY_MANDATORY_MEDIUM_RID` (0x2000) for
+  //! processes belonging to normal authenticated users and
+  //! `SECURITY_MANDATORY_HIGH_RID` (0x3000) for elevated processes.
+  //!
+  //! This field is Windows-specific, and has no meaning on other operating
+  //! systems.
+  uint32_t ProcessIntegrityLevel;
+
+  //! \brief The process’ execute flags.
+  //!
+  //! On Windows, this appears to be returned by `NtQueryInformationProcess()`
+  //! with an argument of `ProcessExecuteFlags` (34).
+  //!
+  //! This field is Windows-specific, and has no meaning on other operating
+  //! systems.
+  uint32_t ProcessExecuteFlags;
+
+  //! \brief Whether the process is protected.
+  //!
+  //! This field is Windows-specific, and has no meaning on other operating
+  //! systems.
+  uint32_t ProtectedProcess;
+
+  //! \brief Whether daylight saving time was being observed in the system’s
+  //!     location at the time of the snapshot.
+  //!
+  //! This field can contain the following values:
+  //!  - `0` if the location does not observe daylight saving time at all. The
+  //!    TIME_ZONE_INFORMATION::StandardName field of #TimeZoneId contains the
+  //!    time zone name.
+  //!  - `1` if the location observes daylight saving time, but standard time
+  //!    was in effect at the time of the snapshot. The
+  //!    TIME_ZONE_INFORMATION::StandardName field of #TimeZoneId contains the
+  //!    time zone name.
+  //!  - `2` if the location observes daylight saving time, and it was in effect
+  //!    at the time of the snapshot. The TIME_ZONE_INFORMATION::DaylightName
+  //!    field of #TimeZoneId contains the time zone name.
+  //!
+  //! \sa #TimeZone
+  uint32_t TimeZoneId;
+
+  //! \brief Information about the time zone at the system’s location.
+  //!
+  //! \sa #TimeZoneId
+  TIME_ZONE_INFORMATION TimeZone;
+};
+
+//! \brief Information about the process that the minidump file contains a
+//!     snapshot of, as well as the system that hosted that process.
+//!
+//! This structure variant is used on Windows 8 (NT 6.2) and later.
+//!
+//! \sa \ref MINIDUMP_MISCx "MINIDUMP_MISC*"
+//! \sa MINIDUMP_MISC_INFO
+//! \sa MINIDUMP_MISC_INFO_2
+//! \sa MINIDUMP_MISC_INFO_3
+//! \sa MINIDUMP_MISC_INFO_N
+struct __attribute__((packed, aligned(4))) MINIDUMP_MISC_INFO_4
+    : public MINIDUMP_MISC_INFO_3 {
+  //! \brief The operating system’s “build string”, a string identifying a
+  //!     specific build of the operating system.
+  //!
+  //! This string is UTF-16-encoded and terminated by a UTF-16 `NUL` code unit.
+  //!
+  //! On Windows 8.1 (NT 6.3), this is “6.3.9600.17031
+  //! (winblue_gdr.140221-1952)”.
+  char16 BuildString[260];
+
+  //! \brief The minidump producer’s “build string”, a string identifying the
+  //!     module that produced a minidump file.
+  //!
+  //! This string is UTF-16-encoded and terminated by a UTF-16 `NUL` code unit.
+  //!
+  //! On Windows 8.1 (NT 6.3), this may be “dbghelp.i386,6.3.9600.16520” or
+  //! “dbghelp.amd64,6.3.9600.16520” depending on CPU architecture.
+  char16 DbgBldStr[40];
+};
+
+//! \brief The latest known version of the MINIDUMP_MISC_INFO structure.
+typedef MINIDUMP_MISC_INFO_4 MINIDUMP_MISC_INFO_N;
+
+//! \brief Minidump file type values for MINIDUMP_HEADER::Flags. These bits
+//!     describe the types of data carried within a minidump file.
+enum MINIDUMP_TYPE {
+  //! \brief A minidump file without any additional data.
+  //!
+  //! This type of minidump file contains:
+  //!  - A MINIDUMP_SYSTEM_INFO stream.
+  //!  - A MINIDUMP_MISC_INFO, MINIDUMP_MISC_INFO_2, MINIDUMP_MISC_INFO_3, or
+  //!    MINIDUMP_MISC_INFO_4 stream, depending on which fields are present.
+  //!  - A MINIDUMP_THREAD_LIST stream. All threads are present, along with a
+  //!    snapshot of each thread’s stack memory sufficient to obtain backtraces.
+  //!  - If the minidump file was generated as a result of an exception, a
+  //!    MINIDUMP_EXCEPTION_STREAM describing the exception.
+  //!  - A MINIDUMP_MODULE_LIST stream. All loaded modules are present.
+  //!  - Typically, a MINIDUMP_MEMORY_LIST stream containing duplicate pointers
+  //!    to the stack memory regions also referenced by the MINIDUMP_THREAD_LIST
+  //!    stream. Since Windows 7 (NT 6.1), this type of minidump file also
+  //!    includes a MINIDUMP_MEMORY_DESCRIPTOR containing the 256 bytes centered
+  //!    around the exception address or the instruction pointer.
+  MiniDumpNormal = 0x00000000,
+};
+
+#endif  // CRASHPAD_COMPAT_NON_WIN_DBGHELP_H_