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Improve ARM CPU info reporting.

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This patch improves several things for Linux/ARM:

- Better detection of the number of CPUs on the target
  device. The content of /proc/cpuinfo only matches the
  number of "online" CPUs, which varies over time with
  recent Android devices.

- Reconstruct the CPUID and ELF hwcaps values from
  /proc/cpuinfo, this is useful to better identify
  target devices in minidumps.

- Make minidump_dump display the new information
  in useful ways.

- Write a small helper class to parse /proc/cpuinfo
  and also use it for x86/64.

- Write a small helper class to parse sysfds cpu lists.

- Add a my_memchr() implementation.

- Add unit tests.

Tested on a Nexus S (1 CPU), Galaxy Nexus (2 CPUs)
and a Nexus 4 (4 CPUs).

Review URL: https://breakpad.appspot.com/540003

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1160 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
digit@chromium.org 2013-04-24 10:06:14 +00:00
parent 9f45f6b5cf
commit 593eff42ca
15 changed files with 1249 additions and 127 deletions
Download patch file Download diff file Expand all files Collapse all files

30
src/google_breakpad/common/minidump_format.h
View file

@ -551,19 +551,48 @@ typedef union {
uint32_t feature_information; /* cpuid 1: edx */
uint32_t amd_extended_cpu_features; /* cpuid 0x80000001, ebx */
} x86_cpu_info;
struct {
uint32_t cpuid;
uint32_t elf_hwcaps; /* linux specific, 0 otherwise */
} arm_cpu_info;
struct {
uint64_t processor_features[2];
} other_cpu_info;
} MDCPUInformation; /* CPU_INFORMATION */
/* For (MDCPUInformation).arm_cpu_info.elf_hwcaps.
* This matches the Linux kernel definitions from <asm/hwcaps.h> */
typedef enum {
MD_CPU_ARM_ELF_HWCAP_SWP = (1 << 0),
MD_CPU_ARM_ELF_HWCAP_HALF = (1 << 1),
MD_CPU_ARM_ELF_HWCAP_THUMB = (1 << 2),
MD_CPU_ARM_ELF_HWCAP_26BIT = (1 << 3),
MD_CPU_ARM_ELF_HWCAP_FAST_MULT = (1 << 4),
MD_CPU_ARM_ELF_HWCAP_FPA = (1 << 5),
MD_CPU_ARM_ELF_HWCAP_VFP = (1 << 6),
MD_CPU_ARM_ELF_HWCAP_EDSP = (1 << 7),
MD_CPU_ARM_ELF_HWCAP_JAVA = (1 << 8),
MD_CPU_ARM_ELF_HWCAP_IWMMXT = (1 << 9),
MD_CPU_ARM_ELF_HWCAP_CRUNCH = (1 << 10),
MD_CPU_ARM_ELF_HWCAP_THUMBEE = (1 << 11),
MD_CPU_ARM_ELF_HWCAP_NEON = (1 << 12),
MD_CPU_ARM_ELF_HWCAP_VFPv3 = (1 << 13),
MD_CPU_ARM_ELF_HWCAP_VFPv3D16 = (1 << 14),
MD_CPU_ARM_ELF_HWCAP_TLS = (1 << 15),
MD_CPU_ARM_ELF_HWCAP_VFPv4 = (1 << 16),
MD_CPU_ARM_ELF_HWCAP_IDIVA = (1 << 17),
MD_CPU_ARM_ELF_HWCAP_IDIVT = (1 << 18),
} MDCPUInformationARMElfHwCaps;
typedef struct {
/* The next 3 fields and numberOfProcessors are from the SYSTEM_INFO
* structure as returned by GetSystemInfo */
uint16_t processor_architecture;
uint16_t processor_level; /* x86: 5 = 586, 6 = 686, ... */
/* ARM: 6 = ARMv6, 7 = ARMv7 ... */
uint16_t processor_revision; /* x86: 0xMMSS, where MM=model,
* SS=stepping */
/* ARM: 0 */
uint8_t number_of_processors;
uint8_t product_type; /* Windows: VER_NT_* from WinNT.h */
@ -626,7 +655,6 @@ typedef enum {
MD_OS_ANDROID = 0x8203 /* Android */
} MDOSPlatform;
typedef struct {
uint32_t size_of_info; /* Length of entire MDRawMiscInfo structure. */
uint32_t flags1;