Nuke the sandbox

1 files changed, 0 insertions, 296 deletions

diff --git a/security/sandbox/chromium/base/cpu.cc b/security/sandbox/chromium/base/cpu.cc
deleted file mode 100644
index 713544566..000000000
--- a/security/sandbox/chromium/base/cpu.cc
+++ /dev/null
@@ -1,296 +0,0 @@
-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/cpu.h"
-
-#include <limits.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include <algorithm>
-
-#include "base/macros.h"
-#include "base/strings/string_piece.h"
-#include "build/build_config.h"
-
-#if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX))
-#include "base/files/file_util.h"
-#include "base/lazy_instance.h"
-#endif
-
-#if defined(ARCH_CPU_X86_FAMILY)
-#if defined(_MSC_VER)
-#include <intrin.h>
-#include <immintrin.h>  // For _xgetbv()
-#endif
-#endif
-
-namespace base {
-
-CPU::CPU()
-  : signature_(0),
-    type_(0),
-    family_(0),
-    model_(0),
-    stepping_(0),
-    ext_model_(0),
-    ext_family_(0),
-    has_mmx_(false),
-    has_sse_(false),
-    has_sse2_(false),
-    has_sse3_(false),
-    has_ssse3_(false),
-    has_sse41_(false),
-    has_sse42_(false),
-    has_avx_(false),
-    has_avx2_(false),
-    has_aesni_(false),
-    has_non_stop_time_stamp_counter_(false),
-    has_broken_neon_(false),
-    cpu_vendor_("unknown") {
-  Initialize();
-}
-
-namespace {
-
-#if defined(ARCH_CPU_X86_FAMILY)
-#ifndef _MSC_VER
-
-#if defined(__pic__) && defined(__i386__)
-
-void __cpuid(int cpu_info[4], int info_type) {
-  __asm__ volatile (
-    "mov %%ebx, %%edi\n"
-    "cpuid\n"
-    "xchg %%edi, %%ebx\n"
-    : "=a"(cpu_info[0]), "=D"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
-    : "a"(info_type)
-  );
-}
-
-#else
-
-void __cpuid(int cpu_info[4], int info_type) {
-  __asm__ volatile (
-    "cpuid\n"
-    : "=a"(cpu_info[0]), "=b"(cpu_info[1]), "=c"(cpu_info[2]), "=d"(cpu_info[3])
-    : "a"(info_type)
-  );
-}
-
-#endif
-
-// _xgetbv returns the value of an Intel Extended Control Register (XCR).
-// Currently only XCR0 is defined by Intel so |xcr| should always be zero.
-uint64_t _xgetbv(uint32_t xcr) {
-  uint32_t eax, edx;
-
-  __asm__ volatile (
-    "xgetbv" : "=a"(eax), "=d"(edx) : "c"(xcr));
-  return (static_cast<uint64_t>(edx) << 32) | eax;
-}
-
-#endif  // !_MSC_VER
-#endif  // ARCH_CPU_X86_FAMILY
-
-#if defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX))
-class LazyCpuInfoValue {
- public:
-  LazyCpuInfoValue() : has_broken_neon_(false) {
-    // This function finds the value from /proc/cpuinfo under the key "model
-    // name" or "Processor". "model name" is used in Linux 3.8 and later (3.7
-    // and later for arm64) and is shown once per CPU. "Processor" is used in
-    // earler versions and is shown only once at the top of /proc/cpuinfo
-    // regardless of the number CPUs.
-    const char kModelNamePrefix[] = "model name\t: ";
-    const char kProcessorPrefix[] = "Processor\t: ";
-
-    // This function also calculates whether we believe that this CPU has a
-    // broken NEON unit based on these fields from cpuinfo:
-    unsigned implementer = 0, architecture = 0, variant = 0, part = 0,
-             revision = 0;
-    const struct {
-      const char key[17];
-      unsigned int* result;
-    } kUnsignedValues[] = {
-      {"CPU implementer", &implementer},
-      {"CPU architecture", &architecture},
-      {"CPU variant", &variant},
-      {"CPU part", &part},
-      {"CPU revision", &revision},
-    };
-
-    std::string contents;
-    ReadFileToString(FilePath("/proc/cpuinfo"), &contents);
-    DCHECK(!contents.empty());
-    if (contents.empty()) {
-      return;
-    }
-
-    std::istringstream iss(contents);
-    std::string line;
-    while (std::getline(iss, line)) {
-      if (brand_.empty() &&
-          (line.compare(0, strlen(kModelNamePrefix), kModelNamePrefix) == 0 ||
-           line.compare(0, strlen(kProcessorPrefix), kProcessorPrefix) == 0)) {
-        brand_.assign(line.substr(strlen(kModelNamePrefix)));
-      }
-
-      for (size_t i = 0; i < arraysize(kUnsignedValues); i++) {
-        const char *key = kUnsignedValues[i].key;
-        const size_t len = strlen(key);
-
-        if (line.compare(0, len, key) == 0 &&
-            line.size() >= len + 1 &&
-            (line[len] == '\t' || line[len] == ' ' || line[len] == ':')) {
-          size_t colon_pos = line.find(':', len);
-          if (colon_pos == std::string::npos) {
-            continue;
-          }
-
-          const StringPiece line_sp(line);
-          StringPiece value_sp = line_sp.substr(colon_pos + 1);
-          while (!value_sp.empty() &&
-                 (value_sp[0] == ' ' || value_sp[0] == '\t')) {
-            value_sp = value_sp.substr(1);
-          }
-
-          // The string may have leading "0x" or not, so we use strtoul to
-          // handle that.
-          char* endptr;
-          std::string value(value_sp.as_string());
-          unsigned long int result = strtoul(value.c_str(), &endptr, 0);
-          if (*endptr == 0 && result <= UINT_MAX) {
-            *kUnsignedValues[i].result = result;
-          }
-        }
-      }
-    }
-
-    has_broken_neon_ =
-      implementer == 0x51 &&
-      architecture == 7 &&
-      variant == 1 &&
-      part == 0x4d &&
-      revision == 0;
-  }
-
-  const std::string& brand() const { return brand_; }
-  bool has_broken_neon() const { return has_broken_neon_; }
-
- private:
-  std::string brand_;
-  bool has_broken_neon_;
-  DISALLOW_COPY_AND_ASSIGN(LazyCpuInfoValue);
-};
-
-base::LazyInstance<LazyCpuInfoValue>::Leaky g_lazy_cpuinfo =
-    LAZY_INSTANCE_INITIALIZER;
-
-#endif  // defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) ||
-        // defined(OS_LINUX))
-
-}  // anonymous namespace
-
-void CPU::Initialize() {
-#if defined(ARCH_CPU_X86_FAMILY)
-  int cpu_info[4] = {-1};
-  char cpu_string[48];
-
-  // __cpuid with an InfoType argument of 0 returns the number of
-  // valid Ids in CPUInfo[0] and the CPU identification string in
-  // the other three array elements. The CPU identification string is
-  // not in linear order. The code below arranges the information
-  // in a human readable form. The human readable order is CPUInfo[1] |
-  // CPUInfo[3] | CPUInfo[2]. CPUInfo[2] and CPUInfo[3] are swapped
-  // before using memcpy to copy these three array elements to cpu_string.
-  __cpuid(cpu_info, 0);
-  int num_ids = cpu_info[0];
-  std::swap(cpu_info[2], cpu_info[3]);
-  memcpy(cpu_string, &cpu_info[1], 3 * sizeof(cpu_info[1]));
-  cpu_vendor_.assign(cpu_string, 3 * sizeof(cpu_info[1]));
-
-  // Interpret CPU feature information.
-  if (num_ids > 0) {
-    int cpu_info7[4] = {0};
-    __cpuid(cpu_info, 1);
-    if (num_ids >= 7) {
-      __cpuid(cpu_info7, 7);
-    }
-    signature_ = cpu_info[0];
-    stepping_ = cpu_info[0] & 0xf;
-    model_ = ((cpu_info[0] >> 4) & 0xf) + ((cpu_info[0] >> 12) & 0xf0);
-    family_ = (cpu_info[0] >> 8) & 0xf;
-    type_ = (cpu_info[0] >> 12) & 0x3;
-    ext_model_ = (cpu_info[0] >> 16) & 0xf;
-    ext_family_ = (cpu_info[0] >> 20) & 0xff;
-    has_mmx_ =   (cpu_info[3] & 0x00800000) != 0;
-    has_sse_ =   (cpu_info[3] & 0x02000000) != 0;
-    has_sse2_ =  (cpu_info[3] & 0x04000000) != 0;
-    has_sse3_ =  (cpu_info[2] & 0x00000001) != 0;
-    has_ssse3_ = (cpu_info[2] & 0x00000200) != 0;
-    has_sse41_ = (cpu_info[2] & 0x00080000) != 0;
-    has_sse42_ = (cpu_info[2] & 0x00100000) != 0;
-    // AVX instructions will generate an illegal instruction exception unless
-    //   a) they are supported by the CPU,
-    //   b) XSAVE is supported by the CPU and
-    //   c) XSAVE is enabled by the kernel.
-    // See http://software.intel.com/en-us/blogs/2011/04/14/is-avx-enabled
-    //
-    // In addition, we have observed some crashes with the xgetbv instruction
-    // even after following Intel's example code. (See crbug.com/375968.)
-    // Because of that, we also test the XSAVE bit because its description in
-    // the CPUID documentation suggests that it signals xgetbv support.
-    has_avx_ =
-        (cpu_info[2] & 0x10000000) != 0 &&
-        (cpu_info[2] & 0x04000000) != 0 /* XSAVE */ &&
-        (cpu_info[2] & 0x08000000) != 0 /* OSXSAVE */ &&
-        (_xgetbv(0) & 6) == 6 /* XSAVE enabled by kernel */;
-    has_aesni_ = (cpu_info[2] & 0x02000000) != 0;
-    has_avx2_ = has_avx_ && (cpu_info7[1] & 0x00000020) != 0;
-  }
-
-  // Get the brand string of the cpu.
-  __cpuid(cpu_info, 0x80000000);
-  const int parameter_end = 0x80000004;
-  int max_parameter = cpu_info[0];
-
-  if (cpu_info[0] >= parameter_end) {
-    char* cpu_string_ptr = cpu_string;
-
-    for (int parameter = 0x80000002; parameter <= parameter_end &&
-         cpu_string_ptr < &cpu_string[sizeof(cpu_string)]; parameter++) {
-      __cpuid(cpu_info, parameter);
-      memcpy(cpu_string_ptr, cpu_info, sizeof(cpu_info));
-      cpu_string_ptr += sizeof(cpu_info);
-    }
-    cpu_brand_.assign(cpu_string, cpu_string_ptr - cpu_string);
-  }
-
-  const int parameter_containing_non_stop_time_stamp_counter = 0x80000007;
-  if (max_parameter >= parameter_containing_non_stop_time_stamp_counter) {
-    __cpuid(cpu_info, parameter_containing_non_stop_time_stamp_counter);
-    has_non_stop_time_stamp_counter_ = (cpu_info[3] & (1 << 8)) != 0;
-  }
-#elif defined(ARCH_CPU_ARM_FAMILY) && (defined(OS_ANDROID) || defined(OS_LINUX))
-  cpu_brand_.assign(g_lazy_cpuinfo.Get().brand());
-  has_broken_neon_ = g_lazy_cpuinfo.Get().has_broken_neon();
-#endif
-}
-
-CPU::IntelMicroArchitecture CPU::GetIntelMicroArchitecture() const {
-  if (has_avx2()) return AVX2;
-  if (has_avx()) return AVX;
-  if (has_sse42()) return SSE42;
-  if (has_sse41()) return SSE41;
-  if (has_ssse3()) return SSSE3;
-  if (has_sse3()) return SSE3;
-  if (has_sse2()) return SSE2;
-  if (has_sse()) return SSE;
-  return PENTIUM;
-}
-
-}  // namespace base