Than Ngo
1 week ago
parent
e54d1538ea
commit
97da4a0b9f
@ -1,112 +0,0 @@
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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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