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cgo
[ DIR ]
drwxr-xr-x
debug
[ DIR ]
drwxr-xr-x
internal
[ DIR ]
drwxr-xr-x
msan
[ DIR ]
drwxr-xr-x
pprof
[ DIR ]
drwxr-xr-x
race
[ DIR ]
drwxr-xr-x
testdata
[ DIR ]
drwxr-xr-x
trace
[ DIR ]
drwxr-xr-x
HACKING.md
13.07
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Makefile
178
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alg.go
10.18
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asm.s
1.16
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asm_386.s
40.2
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asm_amd64.s
45.78
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asm_arm.s
30.89
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asm_arm64.s
33.12
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asm_mips64x.s
22.45
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asm_mipsx.s
24.72
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asm_ppc64x.h
1023
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asm_ppc64x.s
29.39
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asm_riscv64.s
17.38
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asm_s390x.s
26.35
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asm_wasm.s
9.65
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atomic_arm64.s
259
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atomic_mips64x.s
296
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atomic_mipsx.s
258
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atomic_pointer.go
2.62
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atomic_ppc64x.s
433
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atomic_riscv64.s
307
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auxv_none.go
358
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callers_test.go
7.7
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cgo.go
2.01
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cgo_mmap.go
2.38
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cgo_ppc64x.go
411
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cgo_sigaction.go
3.09
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cgocall.go
21.38
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cgocallback.go
317
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cgocheck.go
6.8
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chan.go
19.71
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chan_test.go
21.27
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chanbarrier_test.go
1.4
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checkptr.go
2.5
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checkptr_test.go
1.27
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closure_test.go
936
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compiler.go
413
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complex.go
1.59
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complex_test.go
1.05
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cpuflags.go
740
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cpuflags_amd64.go
533
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cpuprof.go
6.65
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cputicks.go
478
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crash_cgo_test.go
13.71
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crash_nonunix_test.go
385
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crash_test.go
20.24
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crash_unix_test.go
8.89
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debug.go
1.63
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debug_test.go
6.16
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debugcall.go
2.83
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debuglog.go
17.08
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debuglog_off.go
356
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debuglog_on.go
1.09
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debuglog_test.go
4.56
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defer_test.go
9.98
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defs1_linux.go
844
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defs1_netbsd_386.go
2.84
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defs1_netbsd_amd64.go
3.07
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defs1_netbsd_arm.go
2.96
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defs1_netbsd_arm64.go
3.18
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defs1_solaris_amd64.go
4.02
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defs2_linux.go
3.51
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defs3_linux.go
1.09
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defs_aix.go
4.16
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defs_aix_ppc64.go
3.61
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defs_arm_linux.go
2.67
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defs_darwin.go
3.84
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defs_darwin_386.go
5.98
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defs_darwin_amd64.go
6.07
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defs_darwin_arm.go
3.78
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defs_darwin_arm64.go
3.84
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defs_dragonfly.go
2.54
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defs_dragonfly_amd64.go
3.25
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defs_freebsd.go
3.84
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defs_freebsd_386.go
4.35
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defs_freebsd_amd64.go
4.62
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defs_freebsd_arm.go
3.68
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defs_freebsd_arm64.go
4
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defs_illumos_amd64.go
285
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defs_linux.go
3.04
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defs_linux_386.go
4.05
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defs_linux_amd64.go
4.56
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defs_linux_arm.go
3.31
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defs_linux_arm64.go
3.23
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defs_linux_mips64x.go
3.04
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defs_linux_mipsx.go
3.18
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defs_linux_ppc64.go
3.28
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defs_linux_ppc64le.go
3.28
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defs_linux_riscv64.go
3.27
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defs_linux_s390x.go
2.76
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defs_netbsd.go
2.74
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defs_netbsd_386.go
854
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defs_netbsd_amd64.go
1.01
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defs_netbsd_arm.go
763
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defs_openbsd.go
2.6
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defs_openbsd_386.go
2.63
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defs_openbsd_amd64.go
2.83
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defs_openbsd_arm.go
2.74
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defs_openbsd_arm64.go
2.34
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defs_plan9_386.go
1.47
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defs_plan9_amd64.go
1.66
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defs_plan9_arm.go
1.73
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defs_solaris.go
3.33
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defs_solaris_amd64.go
1003
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defs_windows.go
2.07
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defs_windows_386.go
3.75
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defs_windows_amd64.go
4.51
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defs_windows_arm.go
3.59
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duff_386.s
8.24
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duff_amd64.s
5.53
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duff_arm.s
7.11
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duff_arm64.s
5.25
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duff_mips64x.s
11.28
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duff_ppc64x.s
2.45
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duff_s390x.s
507
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env_plan9.go
855
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env_posix.go
1.82
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env_test.go
1.28
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error.go
7.26
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example_test.go
1.34
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export_aix_test.go
204
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export_arm_test.go
226
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export_darwin_test.go
351
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export_debug_test.go
5.28
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export_debuglog_test.go
1.27
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export_futex_test.go
529
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export_linux_test.go
429
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export_mmap_test.go
481
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export_solaris_test.go
282
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export_test.go
23.58
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export_unix_test.go
2.28
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export_windows_test.go
652
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extern.go
11.6
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fastlog2.go
1.22
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fastlog2_test.go
784
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fastlog2table.go
904
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float.go
1.35
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funcdata.h
2.44
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futex_test.go
2.1
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gc_test.go
13.22
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gcinfo_test.go
6.18
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go_tls.h
366
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hash32.go
2.51
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hash64.go
2.6
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hash_test.go
17.54
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heapdump.go
17.1
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iface.go
15.78
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iface_test.go
6.81
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lfstack.go
1.77
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lfstack_32bit.go
522
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lfstack_64bit.go
2.15
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lfstack_test.go
2.78
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libfuzzer.go
2.58
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libfuzzer_amd64.s
940
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libfuzzer_arm64.s
751
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lock_futex.go
5.06
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lock_js.go
5.45
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lock_sema.go
6.6
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malloc.go
48.32
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malloc_test.go
9.37
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map.go
42.13
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map_benchmark_test.go
10.16
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map_fast32.go
12.18
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map_fast64.go
12.37
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map_faststr.go
13.82
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map_test.go
27.11
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mbarrier.go
12.14
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mbitmap.go
67.53
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mcache.go
5.61
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mcentral.go
7.14
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mem_aix.go
1.93
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mem_bsd.go
2.05
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mem_darwin.go
1.88
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mem_js.go
2.32
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mem_linux.go
5.58
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mem_plan9.go
4.53
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mem_windows.go
3.86
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memclr_386.s
2.4
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memclr_amd64.s
3.65
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memclr_arm.s
2.44
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memclr_arm64.s
3.48
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memclr_mips64x.s
785
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memclr_mipsx.s
1.24
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memclr_plan9_386.s
905
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memclr_plan9_amd64.s
433
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memclr_ppc64x.s
4.2
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memclr_riscv64.s
848
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memclr_s390x.s
1.89
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memclr_wasm.s
544
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memmove_386.s
4.45
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memmove_amd64.s
12.33
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memmove_arm.s
5.9
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memmove_arm64.s
3.56
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memmove_linux_amd64_test.go
1.61
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memmove_mips64x.s
1.82
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memmove_mipsx.s
4.39
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memmove_plan9_386.s
3.06
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memmove_plan9_amd64.s
3.04
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memmove_ppc64x.s
3.33
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memmove_riscv64.s
1.81
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memmove_s390x.s
2.92
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memmove_test.go
10.97
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memmove_wasm.s
1.74
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mfinal.go
14.8
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mfinal_test.go
5.85
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mfixalloc.go
2.72
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mgc.go
74.87
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mgcmark.go
46.5
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mgcscavenge.go
30.95
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mgcscavenge_test.go
12.34
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mgcstack.go
10.55
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mgcsweep.go
14.79
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mgcsweepbuf.go
5.98
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mgcwork.go
14.24
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mheap.go
61.5
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mkduff.go
6.23
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mkfastlog2table.go
1.32
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mkpreempt.go
13.33
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mksizeclasses.go
8.62
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mmap.go
847
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mpagealloc.go
35.25
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mpagealloc_32bit.go
3.75
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mpagealloc_64bit.go
6.51
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mpagealloc_test.go
28.88
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mpagecache.go
5.03
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mpagecache_test.go
9.93
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mpallocbits.go
10.69
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mpallocbits_test.go
12.93
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mprof.go
24.06
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mranges.go
5.41
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msan.go
1.39
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msan0.go
647
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msan_amd64.s
2.03
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msan_arm64.s
1.69
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msize.go
785
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mstats.go
22.62
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mwbbuf.go
10.07
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nbpipe_fcntl_libc_test.go
463
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nbpipe_fcntl_unix_test.go
445
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nbpipe_pipe.go
411
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nbpipe_pipe2.go
509
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nbpipe_test.go
2.17
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net_plan9.go
645
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netpoll.go
14.46
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netpoll_aix.go
4.64
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netpoll_epoll.go
4
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netpoll_fake.go
648
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netpoll_kqueue.go
4.39
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netpoll_solaris.go
10.56
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netpoll_stub.go
1.3
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netpoll_windows.go
4.51
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norace_linux_test.go
888
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norace_test.go
979
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numcpu_freebsd_test.go
381
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os2_aix.go
20.67
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os2_freebsd.go
302
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os2_openbsd.go
296
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os2_plan9.go
1.48
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os2_solaris.go
320
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os3_plan9.go
3.99
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os3_solaris.go
16.92
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os_aix.go
8.29
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os_android.go
463
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os_darwin.go
10.59
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os_darwin_arm.go
749
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os_darwin_arm64.go
416
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os_dragonfly.go
6.2
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os_freebsd.go
10.97
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os_freebsd2.go
478
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os_freebsd_amd64.go
529
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os_freebsd_arm.go
1.32
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os_freebsd_arm64.go
2.97
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os_freebsd_noauxv.go
254
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os_illumos.go
3.93
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os_js.go
2.93
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os_linux.go
13.16
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os_linux_arm.go
1.35
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os_linux_arm64.go
1.02
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os_linux_be64.go
816
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os_linux_generic.go
916
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os_linux_mips64x.go
999
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os_linux_mipsx.go
1.05
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os_linux_noauxv.go
307
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os_linux_novdso.go
298
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os_linux_ppc64x.go
527
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os_linux_riscv64.go
198
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os_linux_s390x.go
455
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os_linux_x86.go
2.69
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os_netbsd.go
8.49
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os_netbsd_386.go
588
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os_netbsd_amd64.go
585
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os_netbsd_arm.go
1.13
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os_netbsd_arm64.go
827
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os_nonopenbsd.go
436
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os_only_solaris.go
356
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os_openbsd.go
7.81
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os_openbsd_arm.go
749
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os_openbsd_arm64.go
714
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os_plan9.go
9.3
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os_plan9_arm.go
462
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os_solaris.go
6.49
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os_windows.go
37.01
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os_windows_arm.go
511
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panic.go
42.23
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panic32.go
4.79
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plugin.go
4.16
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Code Editor : os_linux.go
// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package runtime import ( "runtime/internal/atomic" "runtime/internal/sys" "unsafe" ) type mOS struct{} //go:noescape func futex(addr unsafe.Pointer, op int32, val uint32, ts, addr2 unsafe.Pointer, val3 uint32) int32 // Linux futex. // // futexsleep(uint32 *addr, uint32 val) // futexwakeup(uint32 *addr) // // Futexsleep atomically checks if *addr == val and if so, sleeps on addr. // Futexwakeup wakes up threads sleeping on addr. // Futexsleep is allowed to wake up spuriously. const ( _FUTEX_PRIVATE_FLAG = 128 _FUTEX_WAIT_PRIVATE = 0 | _FUTEX_PRIVATE_FLAG _FUTEX_WAKE_PRIVATE = 1 | _FUTEX_PRIVATE_FLAG ) // Atomically, // if(*addr == val) sleep // Might be woken up spuriously; that's allowed. // Don't sleep longer than ns; ns < 0 means forever. //go:nosplit func futexsleep(addr *uint32, val uint32, ns int64) { // Some Linux kernels have a bug where futex of // FUTEX_WAIT returns an internal error code // as an errno. Libpthread ignores the return value // here, and so can we: as it says a few lines up, // spurious wakeups are allowed. if ns < 0 { futex(unsafe.Pointer(addr), _FUTEX_WAIT_PRIVATE, val, nil, nil, 0) return } var ts timespec ts.setNsec(ns) futex(unsafe.Pointer(addr), _FUTEX_WAIT_PRIVATE, val, unsafe.Pointer(&ts), nil, 0) } // If any procs are sleeping on addr, wake up at most cnt. //go:nosplit func futexwakeup(addr *uint32, cnt uint32) { ret := futex(unsafe.Pointer(addr), _FUTEX_WAKE_PRIVATE, cnt, nil, nil, 0) if ret >= 0 { return } // I don't know that futex wakeup can return // EAGAIN or EINTR, but if it does, it would be // safe to loop and call futex again. systemstack(func() { print("futexwakeup addr=", addr, " returned ", ret, "\n") }) *(*int32)(unsafe.Pointer(uintptr(0x1006))) = 0x1006 } func getproccount() int32 { // This buffer is huge (8 kB) but we are on the system stack // and there should be plenty of space (64 kB). // Also this is a leaf, so we're not holding up the memory for long. // See golang.org/issue/11823. // The suggested behavior here is to keep trying with ever-larger // buffers, but we don't have a dynamic memory allocator at the // moment, so that's a bit tricky and seems like overkill. const maxCPUs = 64 * 1024 var buf [maxCPUs / 8]byte r := sched_getaffinity(0, unsafe.Sizeof(buf), &buf[0]) if r < 0 { return 1 } n := int32(0) for _, v := range buf[:r] { for v != 0 { n += int32(v & 1) v >>= 1 } } if n == 0 { n = 1 } return n } // Clone, the Linux rfork. const ( _CLONE_VM = 0x100 _CLONE_FS = 0x200 _CLONE_FILES = 0x400 _CLONE_SIGHAND = 0x800 _CLONE_PTRACE = 0x2000 _CLONE_VFORK = 0x4000 _CLONE_PARENT = 0x8000 _CLONE_THREAD = 0x10000 _CLONE_NEWNS = 0x20000 _CLONE_SYSVSEM = 0x40000 _CLONE_SETTLS = 0x80000 _CLONE_PARENT_SETTID = 0x100000 _CLONE_CHILD_CLEARTID = 0x200000 _CLONE_UNTRACED = 0x800000 _CLONE_CHILD_SETTID = 0x1000000 _CLONE_STOPPED = 0x2000000 _CLONE_NEWUTS = 0x4000000 _CLONE_NEWIPC = 0x8000000 // As of QEMU 2.8.0 (5ea2fc84d), user emulation requires all six of these // flags to be set when creating a thread; attempts to share the other // five but leave SYSVSEM unshared will fail with -EINVAL. // // In non-QEMU environments CLONE_SYSVSEM is inconsequential as we do not // use System V semaphores. cloneFlags = _CLONE_VM | /* share memory */ _CLONE_FS | /* share cwd, etc */ _CLONE_FILES | /* share fd table */ _CLONE_SIGHAND | /* share sig handler table */ _CLONE_SYSVSEM | /* share SysV semaphore undo lists (see issue #20763) */ _CLONE_THREAD /* revisit - okay for now */ ) //go:noescape func clone(flags int32, stk, mp, gp, fn unsafe.Pointer) int32 // May run with m.p==nil, so write barriers are not allowed. //go:nowritebarrier func newosproc(mp *m) { stk := unsafe.Pointer(mp.g0.stack.hi) /* * note: strace gets confused if we use CLONE_PTRACE here. */ if false { print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " clone=", funcPC(clone), " id=", mp.id, " ostk=", &mp, "\n") } // Disable signals during clone, so that the new thread starts // with signals disabled. It will enable them in minit. var oset sigset sigprocmask(_SIG_SETMASK, &sigset_all, &oset) ret := clone(cloneFlags, stk, unsafe.Pointer(mp), unsafe.Pointer(mp.g0), unsafe.Pointer(funcPC(mstart))) sigprocmask(_SIG_SETMASK, &oset, nil) if ret < 0 { print("runtime: failed to create new OS thread (have ", mcount(), " already; errno=", -ret, ")\n") if ret == -_EAGAIN { println("runtime: may need to increase max user processes (ulimit -u)") } throw("newosproc") } } // Version of newosproc that doesn't require a valid G. //go:nosplit func newosproc0(stacksize uintptr, fn unsafe.Pointer) { stack := sysAlloc(stacksize, &memstats.stacks_sys) if stack == nil { write(2, unsafe.Pointer(&failallocatestack[0]), int32(len(failallocatestack))) exit(1) } ret := clone(cloneFlags, unsafe.Pointer(uintptr(stack)+stacksize), nil, nil, fn) if ret < 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } } var failallocatestack = []byte("runtime: failed to allocate stack for the new OS thread\n") var failthreadcreate = []byte("runtime: failed to create new OS thread\n") const ( _AT_NULL = 0 // End of vector _AT_PAGESZ = 6 // System physical page size _AT_HWCAP = 16 // hardware capability bit vector _AT_RANDOM = 25 // introduced in 2.6.29 _AT_HWCAP2 = 26 // hardware capability bit vector 2 ) var procAuxv = []byte("/proc/self/auxv\x00") var addrspace_vec [1]byte func mincore(addr unsafe.Pointer, n uintptr, dst *byte) int32 func sysargs(argc int32, argv **byte) { n := argc + 1 // skip over argv, envp to get to auxv for argv_index(argv, n) != nil { n++ } // skip NULL separator n++ // now argv+n is auxv auxv := (*[1 << 28]uintptr)(add(unsafe.Pointer(argv), uintptr(n)*sys.PtrSize)) if sysauxv(auxv[:]) != 0 { return } // In some situations we don't get a loader-provided // auxv, such as when loaded as a library on Android. // Fall back to /proc/self/auxv. fd := open(&procAuxv[0], 0 /* O_RDONLY */, 0) if fd < 0 { // On Android, /proc/self/auxv might be unreadable (issue 9229), so we fallback to // try using mincore to detect the physical page size. // mincore should return EINVAL when address is not a multiple of system page size. const size = 256 << 10 // size of memory region to allocate p, err := mmap(nil, size, _PROT_READ|_PROT_WRITE, _MAP_ANON|_MAP_PRIVATE, -1, 0) if err != 0 { return } var n uintptr for n = 4 << 10; n < size; n <<= 1 { err := mincore(unsafe.Pointer(uintptr(p)+n), 1, &addrspace_vec[0]) if err == 0 { physPageSize = n break } } if physPageSize == 0 { physPageSize = size } munmap(p, size) return } var buf [128]uintptr n = read(fd, noescape(unsafe.Pointer(&buf[0])), int32(unsafe.Sizeof(buf))) closefd(fd) if n < 0 { return } // Make sure buf is terminated, even if we didn't read // the whole file. buf[len(buf)-2] = _AT_NULL sysauxv(buf[:]) } func sysauxv(auxv []uintptr) int { var i int for ; auxv[i] != _AT_NULL; i += 2 { tag, val := auxv[i], auxv[i+1] switch tag { case _AT_RANDOM: // The kernel provides a pointer to 16-bytes // worth of random data. startupRandomData = (*[16]byte)(unsafe.Pointer(val))[:] case _AT_PAGESZ: physPageSize = val } archauxv(tag, val) vdsoauxv(tag, val) } return i / 2 } var sysTHPSizePath = []byte("/sys/kernel/mm/transparent_hugepage/hpage_pmd_size\x00") func getHugePageSize() uintptr { var numbuf [20]byte fd := open(&sysTHPSizePath[0], 0 /* O_RDONLY */, 0) if fd < 0 { return 0 } n := read(fd, noescape(unsafe.Pointer(&numbuf[0])), int32(len(numbuf))) closefd(fd) if n <= 0 { return 0 } l := n - 1 // remove trailing newline v, ok := atoi(slicebytetostringtmp(numbuf[:l])) if !ok || v < 0 { v = 0 } if v&(v-1) != 0 { // v is not a power of 2 return 0 } return uintptr(v) } func osinit() { ncpu = getproccount() physHugePageSize = getHugePageSize() osArchInit() } var urandom_dev = []byte("/dev/urandom\x00") func getRandomData(r []byte) { if startupRandomData != nil { n := copy(r, startupRandomData) extendRandom(r, n) return } fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0) n := read(fd, unsafe.Pointer(&r[0]), int32(len(r))) closefd(fd) extendRandom(r, int(n)) } func goenvs() { goenvs_unix() } // Called to do synchronous initialization of Go code built with // -buildmode=c-archive or -buildmode=c-shared. // None of the Go runtime is initialized. //go:nosplit //go:nowritebarrierrec func libpreinit() { initsig(true) } // gsignalInitQuirk, if non-nil, is called for every allocated gsignal G. // // TODO(austin): Remove this after Go 1.15 when we remove the // mlockGsignal workaround. var gsignalInitQuirk func(gsignal *g) // Called to initialize a new m (including the bootstrap m). // Called on the parent thread (main thread in case of bootstrap), can allocate memory. func mpreinit(mp *m) { mp.gsignal = malg(32 * 1024) // Linux wants >= 2K mp.gsignal.m = mp if gsignalInitQuirk != nil { gsignalInitQuirk(mp.gsignal) } } func gettid() uint32 // Called to initialize a new m (including the bootstrap m). // Called on the new thread, cannot allocate memory. func minit() { minitSignals() // Cgo-created threads and the bootstrap m are missing a // procid. We need this for asynchronous preemption and it's // useful in debuggers. getg().m.procid = uint64(gettid()) } // Called from dropm to undo the effect of an minit. //go:nosplit func unminit() { unminitSignals() } //#ifdef GOARCH_386 //#define sa_handler k_sa_handler //#endif func sigreturn() func sigtramp(sig uint32, info *siginfo, ctx unsafe.Pointer) func cgoSigtramp() //go:noescape func sigaltstack(new, old *stackt) //go:noescape func setitimer(mode int32, new, old *itimerval) //go:noescape func rtsigprocmask(how int32, new, old *sigset, size int32) //go:nosplit //go:nowritebarrierrec func sigprocmask(how int32, new, old *sigset) { rtsigprocmask(how, new, old, int32(unsafe.Sizeof(*new))) } func raise(sig uint32) func raiseproc(sig uint32) //go:noescape func sched_getaffinity(pid, len uintptr, buf *byte) int32 func osyield() func pipe() (r, w int32, errno int32) func pipe2(flags int32) (r, w int32, errno int32) func setNonblock(fd int32) //go:nosplit //go:nowritebarrierrec func setsig(i uint32, fn uintptr) { var sa sigactiont sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK | _SA_RESTORER | _SA_RESTART sigfillset(&sa.sa_mask) // Although Linux manpage says "sa_restorer element is obsolete and // should not be used". x86_64 kernel requires it. Only use it on // x86. if GOARCH == "386" || GOARCH == "amd64" { sa.sa_restorer = funcPC(sigreturn) } if fn == funcPC(sighandler) { if iscgo { fn = funcPC(cgoSigtramp) } else { fn = funcPC(sigtramp) } } sa.sa_handler = fn sigaction(i, &sa, nil) } //go:nosplit //go:nowritebarrierrec func setsigstack(i uint32) { var sa sigactiont sigaction(i, nil, &sa) if sa.sa_flags&_SA_ONSTACK != 0 { return } sa.sa_flags |= _SA_ONSTACK sigaction(i, &sa, nil) } //go:nosplit //go:nowritebarrierrec func getsig(i uint32) uintptr { var sa sigactiont sigaction(i, nil, &sa) return sa.sa_handler } // setSignaltstackSP sets the ss_sp field of a stackt. //go:nosplit func setSignalstackSP(s *stackt, sp uintptr) { *(*uintptr)(unsafe.Pointer(&s.ss_sp)) = sp } //go:nosplit func (c *sigctxt) fixsigcode(sig uint32) { } // sysSigaction calls the rt_sigaction system call. //go:nosplit func sysSigaction(sig uint32, new, old *sigactiont) { if rt_sigaction(uintptr(sig), new, old, unsafe.Sizeof(sigactiont{}.sa_mask)) != 0 { // Workaround for bugs in QEMU user mode emulation. // // QEMU turns calls to the sigaction system call into // calls to the C library sigaction call; the C // library call rejects attempts to call sigaction for // SIGCANCEL (32) or SIGSETXID (33). // // QEMU rejects calling sigaction on SIGRTMAX (64). // // Just ignore the error in these case. There isn't // anything we can do about it anyhow. if sig != 32 && sig != 33 && sig != 64 { // Use system stack to avoid split stack overflow on ppc64/ppc64le. systemstack(func() { throw("sigaction failed") }) } } } // rt_sigaction is implemented in assembly. //go:noescape func rt_sigaction(sig uintptr, new, old *sigactiont, size uintptr) int32 func getpid() int func tgkill(tgid, tid, sig int) // touchStackBeforeSignal stores an errno value. If non-zero, it means // that we should touch the signal stack before sending a signal. // This is used on systems that have a bug when the signal stack must // be faulted in. See #35777 and #37436. // // This is accessed atomically as it is set and read in different threads. // // TODO(austin): Remove this after Go 1.15 when we remove the // mlockGsignal workaround. var touchStackBeforeSignal uint32 // signalM sends a signal to mp. func signalM(mp *m, sig int) { if atomic.Load(&touchStackBeforeSignal) != 0 { atomic.Cas((*uint32)(unsafe.Pointer(mp.gsignal.stack.hi-4)), 0, 0) } tgkill(getpid(), int(mp.procid), sig) }
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