e1254add73
64 bit Windows started out with a 44 bit address space due to a restriction of the AMD64 CPUs at the time. Starting with Windows 8.1, these CPUs are not supported anymore and Windows switched to the full 48 bit address space supported by AMD64. Cygwin didn't follow suit yet so mmaps are still restricted to the lower 44 bit address space. Fix that by using a system-specific upper address for mmap allocations, 44 bit up to Windows 8, 48 bit starting with Windows 8.1. While at it, move the heap by another 8 Gigs to leave some space for a potential extension of DLL address space, and restrict the mmap lower address so the heap can grow to 32 Gigs before colliding with mmaps.
109 lines
3.6 KiB
C++
109 lines
3.6 KiB
C++
/* wincap.h: Header for OS capability class.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#ifndef _WINCAP_H
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#define _WINCAP_H
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struct wincaps
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{
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DWORD def_guard_pages;
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int64_t mmap_storage_high;
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/* The bitfields must be 8 byte aligned on x86_64, otherwise the bitfield
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ops generated by gcc are off by 4 bytes. */
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struct __attribute__ ((aligned (8))) {
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unsigned is_server : 1;
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unsigned needs_count_in_si_lpres2 : 1;
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unsigned needs_query_information : 1;
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unsigned has_gaa_largeaddress_bug : 1;
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unsigned has_broken_alloc_console : 1;
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unsigned has_console_logon_sid : 1;
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unsigned has_precise_system_time : 1;
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unsigned has_microsoft_accounts : 1;
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unsigned has_processor_groups : 1;
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unsigned has_broken_prefetchvm : 1;
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unsigned has_new_pebteb_region : 1;
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unsigned has_broken_whoami : 1;
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unsigned has_unprivileged_createsymlink : 1;
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unsigned has_unbiased_interrupt_time : 1;
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unsigned has_precise_interrupt_time : 1;
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unsigned has_posix_unlink_semantics : 1;
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unsigned has_case_sensitive_dirs : 1;
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unsigned has_posix_rename_semantics : 1;
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unsigned no_msv1_0_s4u_logon_in_wow64 : 1;
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unsigned has_con_24bit_colors : 1;
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};
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};
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class wincapc
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{
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SYSTEM_INFO system_info;
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RTL_OSVERSIONINFOEXW version;
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char osnam[40];
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ULONG_PTR wow64;
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void *caps;
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public:
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void init ();
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const DWORD cpu_count () const { return system_info.dwNumberOfProcessors; }
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const DWORD_PTR cpu_mask () const { return system_info.dwActiveProcessorMask;}
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const WORD cpu_arch () const { return system_info.wProcessorArchitecture; }
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const WORD cpu_level () const { return system_info.wProcessorLevel; }
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/* The casts to size_t make sure that the returned value has the size of
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a pointer on any system. This is important when using them for bit
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mask operations, like in roundup2. */
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const size_t page_size () const { return (size_t) system_info.dwPageSize; }
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const size_t allocation_granularity () const
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{ return (size_t) system_info.dwAllocationGranularity; }
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const char *osname () const { return osnam; }
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const DWORD build_number () const { return version.dwBuildNumber; }
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const bool is_wow64 () const { return !!wow64; }
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#define IMPLEMENT(cap) cap() const { return ((wincaps *) this->caps)->cap; }
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DWORD def_guard_page_size () const
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{
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return ((wincaps *) this->caps)->def_guard_pages * page_size ();
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}
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#ifdef __x86_64__
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intptr_t IMPLEMENT (mmap_storage_high)
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#endif
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bool IMPLEMENT (is_server)
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bool IMPLEMENT (needs_count_in_si_lpres2)
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bool IMPLEMENT (needs_query_information)
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bool IMPLEMENT (has_gaa_largeaddress_bug)
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bool IMPLEMENT (has_broken_alloc_console)
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bool IMPLEMENT (has_console_logon_sid)
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bool IMPLEMENT (has_precise_system_time)
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bool IMPLEMENT (has_microsoft_accounts)
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bool IMPLEMENT (has_processor_groups)
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bool IMPLEMENT (has_broken_prefetchvm)
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bool IMPLEMENT (has_new_pebteb_region)
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bool IMPLEMENT (has_broken_whoami)
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bool IMPLEMENT (has_unprivileged_createsymlink)
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bool IMPLEMENT (has_unbiased_interrupt_time)
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bool IMPLEMENT (has_precise_interrupt_time)
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bool IMPLEMENT (has_posix_unlink_semantics)
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bool IMPLEMENT (has_case_sensitive_dirs)
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bool IMPLEMENT (has_posix_rename_semantics)
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bool IMPLEMENT (no_msv1_0_s4u_logon_in_wow64)
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bool IMPLEMENT (has_con_24bit_colors)
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void disable_case_sensitive_dirs ()
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{
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((wincaps *)caps)->has_case_sensitive_dirs = false;
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}
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#undef IMPLEMENT
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};
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extern wincapc wincap;
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#endif /* _WINCAP_H */
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