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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_darwin.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 "unsafe" type mOS struct { initialized bool mutex pthreadmutex cond pthreadcond count int } func unimplemented(name string) { println(name, "not implemented") *(*int)(unsafe.Pointer(uintptr(1231))) = 1231 } //go:nosplit func semacreate(mp *m) { if mp.initialized { return } mp.initialized = true if err := pthread_mutex_init(&mp.mutex, nil); err != 0 { throw("pthread_mutex_init") } if err := pthread_cond_init(&mp.cond, nil); err != 0 { throw("pthread_cond_init") } } //go:nosplit func semasleep(ns int64) int32 { var start int64 if ns >= 0 { start = nanotime() } mp := getg().m pthread_mutex_lock(&mp.mutex) for { if mp.count > 0 { mp.count-- pthread_mutex_unlock(&mp.mutex) return 0 } if ns >= 0 { spent := nanotime() - start if spent >= ns { pthread_mutex_unlock(&mp.mutex) return -1 } var t timespec t.setNsec(ns - spent) err := pthread_cond_timedwait_relative_np(&mp.cond, &mp.mutex, &t) if err == _ETIMEDOUT { pthread_mutex_unlock(&mp.mutex) return -1 } } else { pthread_cond_wait(&mp.cond, &mp.mutex) } } } //go:nosplit func semawakeup(mp *m) { pthread_mutex_lock(&mp.mutex) mp.count++ if mp.count > 0 { pthread_cond_signal(&mp.cond) } pthread_mutex_unlock(&mp.mutex) } // The read and write file descriptors used by the sigNote functions. var sigNoteRead, sigNoteWrite int32 // sigNoteSetup initializes an async-signal-safe note. // // The current implementation of notes on Darwin is not async-signal-safe, // because the functions pthread_mutex_lock, pthread_cond_signal, and // pthread_mutex_unlock, called by semawakeup, are not async-signal-safe. // There is only one case where we need to wake up a note from a signal // handler: the sigsend function. The signal handler code does not require // all the features of notes: it does not need to do a timed wait. // This is a separate implementation of notes, based on a pipe, that does // not support timed waits but is async-signal-safe. func sigNoteSetup(*note) { if sigNoteRead != 0 || sigNoteWrite != 0 { throw("duplicate sigNoteSetup") } var errno int32 sigNoteRead, sigNoteWrite, errno = pipe() if errno != 0 { throw("pipe failed") } closeonexec(sigNoteRead) closeonexec(sigNoteWrite) // Make the write end of the pipe non-blocking, so that if the pipe // buffer is somehow full we will not block in the signal handler. // Leave the read end of the pipe blocking so that we will block // in sigNoteSleep. setNonblock(sigNoteWrite) } // sigNoteWakeup wakes up a thread sleeping on a note created by sigNoteSetup. func sigNoteWakeup(*note) { var b byte write(uintptr(sigNoteWrite), unsafe.Pointer(&b), 1) } // sigNoteSleep waits for a note created by sigNoteSetup to be woken. func sigNoteSleep(*note) { entersyscallblock() var b byte read(sigNoteRead, unsafe.Pointer(&b), 1) exitsyscall() } // BSD interface for threading. func osinit() { // pthread_create delayed until end of goenvs so that we // can look at the environment first. ncpu = getncpu() physPageSize = getPageSize() } const ( _CTL_HW = 6 _HW_NCPU = 3 _HW_PAGESIZE = 7 ) func getncpu() int32 { // Use sysctl to fetch hw.ncpu. mib := [2]uint32{_CTL_HW, _HW_NCPU} out := uint32(0) nout := unsafe.Sizeof(out) ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0) if ret >= 0 && int32(out) > 0 { return int32(out) } return 1 } func getPageSize() uintptr { // Use sysctl to fetch hw.pagesize. mib := [2]uint32{_CTL_HW, _HW_PAGESIZE} out := uint32(0) nout := unsafe.Sizeof(out) ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0) if ret >= 0 && int32(out) > 0 { return uintptr(out) } return 0 } var urandom_dev = []byte("/dev/urandom\x00") //go:nosplit func getRandomData(r []byte) { 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() } // May run with m.p==nil, so write barriers are not allowed. //go:nowritebarrierrec func newosproc(mp *m) { stk := unsafe.Pointer(mp.g0.stack.hi) if false { print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n") } // Initialize an attribute object. var attr pthreadattr var err int32 err = pthread_attr_init(&attr) if err != 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } // Find out OS stack size for our own stack guard. var stacksize uintptr if pthread_attr_getstacksize(&attr, &stacksize) != 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } mp.g0.stack.hi = stacksize // for mstart //mSysStatInc(&memstats.stacks_sys, stacksize) //TODO: do this? // Tell the pthread library we won't join with this thread. if pthread_attr_setdetachstate(&attr, _PTHREAD_CREATE_DETACHED) != 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } // Finally, create the thread. It starts at mstart_stub, which does some low-level // setup and then calls mstart. var oset sigset sigprocmask(_SIG_SETMASK, &sigset_all, &oset) err = pthread_create(&attr, funcPC(mstart_stub), unsafe.Pointer(mp)) sigprocmask(_SIG_SETMASK, &oset, nil) if err != 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } } // glue code to call mstart from pthread_create. func mstart_stub() // newosproc0 is a version of newosproc that can be called before the runtime // is initialized. // // This function is not safe to use after initialization as it does not pass an M as fnarg. // //go:nosplit func newosproc0(stacksize uintptr, fn uintptr) { // Initialize an attribute object. var attr pthreadattr var err int32 err = pthread_attr_init(&attr) if err != 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } // The caller passes in a suggested stack size, // from when we allocated the stack and thread ourselves, // without libpthread. Now that we're using libpthread, // we use the OS default stack size instead of the suggestion. // Find out that stack size for our own stack guard. if pthread_attr_getstacksize(&attr, &stacksize) != 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } g0.stack.hi = stacksize // for mstart mSysStatInc(&memstats.stacks_sys, stacksize) // Tell the pthread library we won't join with this thread. if pthread_attr_setdetachstate(&attr, _PTHREAD_CREATE_DETACHED) != 0 { write(2, unsafe.Pointer(&failthreadcreate[0]), int32(len(failthreadcreate))) exit(1) } // Finally, create the thread. It starts at mstart_stub, which does some low-level // setup and then calls mstart. var oset sigset sigprocmask(_SIG_SETMASK, &sigset_all, &oset) err = pthread_create(&attr, fn, nil) sigprocmask(_SIG_SETMASK, &oset, nil) if err != 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") // 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) } // 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) // OS X wants >= 8K mp.gsignal.m = mp } // Called to initialize a new m (including the bootstrap m). // Called on the new thread, cannot allocate memory. func minit() { // The alternate signal stack is buggy on arm and arm64. // The signal handler handles it directly. if GOARCH != "arm" && GOARCH != "arm64" { minitSignalStack() } minitSignalMask() getg().m.procid = uint64(pthread_self()) } // Called from dropm to undo the effect of an minit. //go:nosplit func unminit() { // The alternate signal stack is buggy on arm and arm64. // See minit. if GOARCH != "arm" && GOARCH != "arm64" { unminitSignals() } } //go:nosplit func osyield() { usleep(1) } const ( _NSIG = 32 _SI_USER = 0 /* empirically true, but not what headers say */ _SIG_BLOCK = 1 _SIG_UNBLOCK = 2 _SIG_SETMASK = 3 _SS_DISABLE = 4 ) //extern SigTabTT runtimeĀ·sigtab[]; type sigset uint32 var sigset_all = ^sigset(0) //go:nosplit //go:nowritebarrierrec func setsig(i uint32, fn uintptr) { var sa usigactiont sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK | _SA_RESTART sa.sa_mask = ^uint32(0) if fn == funcPC(sighandler) { if iscgo { fn = funcPC(cgoSigtramp) } else { fn = funcPC(sigtramp) } } *(*uintptr)(unsafe.Pointer(&sa.__sigaction_u)) = fn sigaction(i, &sa, nil) } // sigtramp is the callback from libc when a signal is received. // It is called with the C calling convention. func sigtramp() func cgoSigtramp() //go:nosplit //go:nowritebarrierrec func setsigstack(i uint32) { var osa usigactiont sigaction(i, nil, &osa) handler := *(*uintptr)(unsafe.Pointer(&osa.__sigaction_u)) if osa.sa_flags&_SA_ONSTACK != 0 { return } var sa usigactiont *(*uintptr)(unsafe.Pointer(&sa.__sigaction_u)) = handler sa.sa_mask = osa.sa_mask sa.sa_flags = osa.sa_flags | _SA_ONSTACK sigaction(i, &sa, nil) } //go:nosplit //go:nowritebarrierrec func getsig(i uint32) uintptr { var sa usigactiont sigaction(i, nil, &sa) return *(*uintptr)(unsafe.Pointer(&sa.__sigaction_u)) } // 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 //go:nowritebarrierrec func sigaddset(mask *sigset, i int) { *mask |= 1 << (uint32(i) - 1) } func sigdelset(mask *sigset, i int) { *mask &^= 1 << (uint32(i) - 1) } //go:linkname executablePath os.executablePath var executablePath string func sysargs(argc int32, argv **byte) { // skip over argv, envv and the first string will be the path n := argc + 1 for argv_index(argv, n) != nil { n++ } executablePath = gostringnocopy(argv_index(argv, n+1)) // strip "executable_path=" prefix if available, it's added after OS X 10.11. const prefix = "executable_path=" if len(executablePath) > len(prefix) && executablePath[:len(prefix)] == prefix { executablePath = executablePath[len(prefix):] } } func signalM(mp *m, sig int) { pthread_kill(pthread(mp.procid), uint32(sig)) }
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