Than Ngo
6 months ago
parent
afdd9bead5
commit
1553bbdf81
@ -0,0 +1,24 @@
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--- a/components/variations/proto/study.proto
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+++ b/components/variations/proto/study.proto
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@@ -264,6 +264,9 @@
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// A Mac-only value, indicating an x86-64 binary running on an arm64 host
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// via "Rosetta 2" binary translation.
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TRANSLATED_X86_64 = 4;
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+
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+ // A POSIX-only value, indicating an OpenPOWER host
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+ PPC64 = 5;
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}
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// Enum to pass as optional bool.
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--- a/components/variations/service/variations_field_trial_creator_base.cc
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+++ b/components/variations/service/variations_field_trial_creator_base.cc
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@@ -109,6 +109,9 @@
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if (process_arch == "x86") {
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return Study::X86_32;
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}
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+ if (process_arch == "PPC_64") {
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+ return Study::PPC64;
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+ }
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if (process_arch == "x86_64") {
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std::string os_arch = base::SysInfo::OperatingSystemArchitecture();
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if (base::StartsWith(os_arch, "arm",
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@ -0,0 +1,22 @@
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--- a/base/allocator/partition_allocator/src/partition_alloc/partition_bucket.cc
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+++ b/base/allocator/partition_allocator/src/partition_alloc/partition_bucket.cc
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@@ -506,6 +506,9 @@
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partition_page_count <= kMaxPartitionPagesPerRegularSlotSpan;
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partition_page_count++) {
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size_t candidate_size = partition_page_count * PartitionPageSize();
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+ if (candidate_size > kMaxBucketed) {
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+ break;
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+ }
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size_t waste = candidate_size % slot_size;
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if (waste <= .02 * SystemPageSize()) {
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return partition_page_count * NumSystemPagesPerPartitionPage();
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@@ -522,6 +525,9 @@
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size_t system_page_count =
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partition_page_count * NumSystemPagesPerPartitionPage() - slack;
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size_t candidate_size = system_page_count * SystemPageSize();
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+ if (candidate_size > kMaxBucketed) {
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+ break;
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+ }
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size_t waste = candidate_size % slot_size;
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if (waste < best_waste) {
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best_waste = waste;
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--- a/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_constants.h
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+++ b/base/allocator/partition_allocator/src/partition_alloc/partition_alloc_constants.h
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@@ -100,21 +100,21 @@
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// other constant values, we pack _all_ `PartitionRoot::Alloc` sizes perfectly
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// up against the end of a system page.
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-#if defined(_MIPS_ARCH_LOONGSON) || defined(ARCH_CPU_LOONGARCH64)
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+#if (BUILDFLAG(IS_APPLE) && defined(ARCH_CPU_64_BITS)) || \
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+ defined(PARTITION_ALLOCATOR_CONSTANTS_POSIX_NONCONST_PAGE_SIZE)
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PA_ALWAYS_INLINE PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR size_t
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PartitionPageShift() {
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- return 16; // 64 KiB
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+ return PageAllocationGranularityShift() + 2;
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}
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-#elif defined(ARCH_CPU_PPC64)
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+#elif defined(_MIPS_ARCH_LOONGSON) || defined(ARCH_CPU_LOONGARCH64)
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PA_ALWAYS_INLINE PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR size_t
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PartitionPageShift() {
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- return 18; // 256 KiB
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+ return 16; // 64 KiB
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}
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-#elif (BUILDFLAG(IS_APPLE) && defined(ARCH_CPU_64_BITS)) || \
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- defined(PARTITION_ALLOCATOR_CONSTANTS_POSIX_NONCONST_PAGE_SIZE)
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+#elif defined(ARCH_CPU_PPC64)
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PA_ALWAYS_INLINE PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR size_t
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PartitionPageShift() {
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- return PageAllocationGranularityShift() + 2;
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+ return 18; // 256 KiB
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}
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#else
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PA_ALWAYS_INLINE PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR size_t
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--- a/base/allocator/partition_allocator/src/partition_alloc/page_allocator_constants.h
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+++ b/base/allocator/partition_allocator/src/partition_alloc/page_allocator_constants.h
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@@ -26,7 +26,8 @@
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#define PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR __attribute__((const))
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#elif (BUILDFLAG(IS_ANDROID) && defined(ARCH_CPU_64_BITS)) || \
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- (BUILDFLAG(IS_LINUX) && defined(ARCH_CPU_ARM64))
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+ (BUILDFLAG(IS_LINUX) && defined(ARCH_CPU_ARM64)) || \
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+ (BUILDFLAG(IS_LINUX) && defined(ARCH_CPU_PPC64))
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// This should work for all POSIX (if needed), but currently all other
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// supported OS/architecture combinations use either hard-coded values
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// (such as x86) or have means to determine these values without needing
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@@ -86,17 +87,7 @@
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PA_ALWAYS_INLINE PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR size_t
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PageAllocationGranularityShift() {
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-#if BUILDFLAG(IS_WIN) || defined(ARCH_CPU_PPC64)
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- // Modern ppc64 systems support 4kB (shift = 12) and 64kB (shift = 16) page
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- // sizes. Since 64kB is the de facto standard on the platform and binaries
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- // compiled for 64kB are likely to work on 4kB systems, 64kB is a good choice
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- // here.
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- return 16; // 64kB
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-#elif defined(_MIPS_ARCH_LOONGSON) || defined(ARCH_CPU_LOONGARCH64)
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- return 14; // 16kB
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-#elif BUILDFLAG(IS_APPLE) && defined(ARCH_CPU_64_BITS)
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- return static_cast<size_t>(vm_page_shift);
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-#elif defined(PARTITION_ALLOCATOR_CONSTANTS_POSIX_NONCONST_PAGE_SIZE)
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+#if defined(PARTITION_ALLOCATOR_CONSTANTS_POSIX_NONCONST_PAGE_SIZE)
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// arm64 supports 4kb (shift = 12), 16kb (shift = 14), and 64kb (shift = 16)
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// page sizes. Retrieve from or initialize cache.
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size_t shift = page_characteristics.shift.load(std::memory_order_relaxed);
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@@ -106,6 +97,16 @@
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page_characteristics.shift.store(shift, std::memory_order_relaxed);
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}
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return shift;
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+#elif BUILDFLAG(IS_WIN) || defined(ARCH_CPU_PPC64)
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+ // Modern ppc64 systems support 4kB (shift = 12) and 64kB (shift = 16) page
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+ // sizes. Since 64kB is the de facto standard on the platform and binaries
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+ // compiled for 64kB are likely to work on 4kB systems, 64kB is a good choice
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+ // here.
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+ return 16; // 64kB
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+#elif defined(_MIPS_ARCH_LOONGSON) || defined(ARCH_CPU_LOONGARCH64)
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+ return 14; // 16kB
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+#elif BUILDFLAG(IS_APPLE) && defined(ARCH_CPU_64_BITS)
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+ return static_cast<size_t>(vm_page_shift);
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#else
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return 12; // 4kB
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#endif
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--- a/base/allocator/partition_allocator/src/partition_alloc/address_space_randomization.h
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+++ b/base/allocator/partition_allocator/src/partition_alloc/address_space_randomization.h
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@@ -180,10 +180,10 @@
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#else // !BUILDFLAG(IS_AIX) && !defined(ARCH_CPU_BIG_ENDIAN)
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// Little-endian Linux PPC has 48 bits of virtual addressing. Use 46.
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- PA_ALWAYS_INLINE constexpr uintptr_t ASLRMask() {
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+ PA_ALWAYS_INLINE PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR uintptr_t ASLRMask() {
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return AslrMask(46);
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}
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- PA_ALWAYS_INLINE constexpr uintptr_t ASLROffset() {
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+ PA_ALWAYS_INLINE PAGE_ALLOCATOR_CONSTANTS_DECLARE_CONSTEXPR uintptr_t ASLROffset() {
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return AslrAddress(0);
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}
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--- a/base/allocator/partition_allocator/src/partition_alloc/partition_page_constants.h
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+++ b/base/allocator/partition_allocator/src/partition_alloc/partition_page_constants.h
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@@ -17,10 +17,15 @@
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// PartitionPageSize() is 4 times the OS page size.
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static constexpr size_t kMaxSlotsPerSlotSpan = 4 * (1 << 14) / kSmallestBucket;
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#elif defined(PARTITION_ALLOCATOR_CONSTANTS_POSIX_NONCONST_PAGE_SIZE)
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+#if defined(ARCH_CPU_PPC64)
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+// System page size can be 4 or 64 kiB on Linux on ppc64. Use 64 kiB maximum.
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+static constexpr size_t kMaxSlotsPerSlotSpan = 4 * (1 << 16) / kSmallestBucket;
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+#else
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// System page size can be 4, 16, or 64 kiB on Linux on arm64. 64 kiB is
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// currently (kMaxSlotsPerSlotSpanBits == 13) not supported by the code,
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// so we use the 16 kiB maximum (64 kiB will crash).
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static constexpr size_t kMaxSlotsPerSlotSpan = 4 * (1 << 14) / kSmallestBucket;
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+#endif
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#elif BUILDFLAG(IS_LINUX) && defined(ARCH_CPU_PPC64)
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// System page size is not a constant on OpenPOWER systems, but is either 4kiB
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// or 64kiB (1 << 12 or 1 << 16)
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