mirror of
https://github.com/golang/go
synced 2024-11-08 18:36:22 -07:00
7e1b61c718
We return memory to the kernel with madvise(..., DONTNEED).
Also mark returned memory with NOHUGEPAGE to keep the kernel from
merging this memory into a huge page, effectively reallocating it.
Only known to be a problem on linux/{386,amd64,amd64p32} at the moment.
It may come up on other os/arch combinations in the future.
Fixes #8832
Change-Id: Ifffc6627a0296926e3f189a8a9b6e4bdb54c79eb
Reviewed-on: https://go-review.googlesource.com/5660
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
183 lines
3.3 KiB
Go
183 lines
3.3 KiB
Go
package runtime
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// Constants
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const (
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_EINTR = 0x4
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_ENOMEM = 0xc
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_EAGAIN = 0xb
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_PROT_NONE = 0
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_PROT_READ = 0x1
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_PROT_WRITE = 0x2
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_PROT_EXEC = 0x4
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_MAP_ANON = 0x20
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_MAP_PRIVATE = 0x2
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_MAP_FIXED = 0x10
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_MADV_DONTNEED = 0x4
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_MADV_HUGEPAGE = 0xe
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_MADV_NOHUGEPAGE = 0xf
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_SA_RESTART = 0x10000000
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_SA_ONSTACK = 0x8000000
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_SA_RESTORER = 0 // unused on ARM
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_SA_SIGINFO = 0x4
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_SIGHUP = 0x1
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_SIGINT = 0x2
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_SIGQUIT = 0x3
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_SIGILL = 0x4
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_SIGTRAP = 0x5
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_SIGABRT = 0x6
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_SIGBUS = 0x7
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_SIGFPE = 0x8
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_SIGKILL = 0x9
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_SIGUSR1 = 0xa
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_SIGSEGV = 0xb
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_SIGUSR2 = 0xc
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_SIGPIPE = 0xd
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_SIGALRM = 0xe
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_SIGSTKFLT = 0x10
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_SIGCHLD = 0x11
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_SIGCONT = 0x12
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_SIGSTOP = 0x13
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_SIGTSTP = 0x14
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_SIGTTIN = 0x15
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_SIGTTOU = 0x16
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_SIGURG = 0x17
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_SIGXCPU = 0x18
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_SIGXFSZ = 0x19
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_SIGVTALRM = 0x1a
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_SIGPROF = 0x1b
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_SIGWINCH = 0x1c
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_SIGIO = 0x1d
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_SIGPWR = 0x1e
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_SIGSYS = 0x1f
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_FPE_INTDIV = 0x1
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_FPE_INTOVF = 0x2
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_FPE_FLTDIV = 0x3
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_FPE_FLTOVF = 0x4
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_FPE_FLTUND = 0x5
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_FPE_FLTRES = 0x6
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_FPE_FLTINV = 0x7
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_FPE_FLTSUB = 0x8
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_BUS_ADRALN = 0x1
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_BUS_ADRERR = 0x2
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_BUS_OBJERR = 0x3
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_SEGV_MAPERR = 0x1
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_SEGV_ACCERR = 0x2
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_ITIMER_REAL = 0
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_ITIMER_PROF = 0x2
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_ITIMER_VIRTUAL = 0x1
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_O_RDONLY = 0
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_O_CLOEXEC = 0x80000
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_EPOLLIN = 0x1
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_EPOLLOUT = 0x4
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_EPOLLERR = 0x8
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_EPOLLHUP = 0x10
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_EPOLLRDHUP = 0x2000
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_EPOLLET = 0x80000000
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_EPOLL_CLOEXEC = 0x80000
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_EPOLL_CTL_ADD = 0x1
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_EPOLL_CTL_DEL = 0x2
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_EPOLL_CTL_MOD = 0x3
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_AF_UNIX = 0x1
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_F_SETFL = 0x4
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_SOCK_DGRAM = 0x2
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)
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type timespec struct {
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tv_sec int32
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tv_nsec int32
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}
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func (ts *timespec) set_sec(x int64) {
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ts.tv_sec = int32(x)
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}
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func (ts *timespec) set_nsec(x int32) {
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ts.tv_nsec = x
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}
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type sigaltstackt struct {
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ss_sp *byte
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ss_flags int32
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ss_size uintptr
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}
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type sigcontext struct {
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trap_no uint32
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error_code uint32
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oldmask uint32
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r0 uint32
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r1 uint32
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r2 uint32
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r3 uint32
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r4 uint32
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r5 uint32
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r6 uint32
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r7 uint32
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r8 uint32
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r9 uint32
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r10 uint32
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fp uint32
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ip uint32
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sp uint32
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lr uint32
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pc uint32
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cpsr uint32
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fault_address uint32
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}
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type ucontext struct {
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uc_flags uint32
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uc_link *ucontext
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uc_stack sigaltstackt
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uc_mcontext sigcontext
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uc_sigmask uint32
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__unused [31]int32
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uc_regspace [128]uint32
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}
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type timeval struct {
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tv_sec int32
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tv_usec int32
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}
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func (tv *timeval) set_usec(x int32) {
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tv.tv_usec = x
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}
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type itimerval struct {
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it_interval timeval
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it_value timeval
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}
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type siginfo struct {
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si_signo int32
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si_errno int32
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si_code int32
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// below here is a union; si_addr is the only field we use
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si_addr uint32
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}
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type sigactiont struct {
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sa_handler uintptr
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sa_flags uint32
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sa_restorer uintptr
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sa_mask uint64
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}
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type epollevent struct {
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events uint32
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_pad uint32
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data [8]byte // to match amd64
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}
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type sockaddr_un struct {
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family uint16
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path [108]byte
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}
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