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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 : sys_windows_386.s
// 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. #include "go_asm.h" #include "go_tls.h" #include "textflag.h" // void runtime·asmstdcall(void *c); TEXT runtime·asmstdcall(SB),NOSPLIT,$0 MOVL fn+0(FP), BX // SetLastError(0). MOVL $0, 0x34(FS) // Copy args to the stack. MOVL SP, BP MOVL libcall_n(BX), CX // words MOVL CX, AX SALL $2, AX SUBL AX, SP // room for args MOVL SP, DI MOVL libcall_args(BX), SI CLD REP; MOVSL // Call stdcall or cdecl function. // DI SI BP BX are preserved, SP is not CALL libcall_fn(BX) MOVL BP, SP // Return result. MOVL fn+0(FP), BX MOVL AX, libcall_r1(BX) MOVL DX, libcall_r2(BX) // GetLastError(). MOVL 0x34(FS), AX MOVL AX, libcall_err(BX) RET TEXT runtime·badsignal2(SB),NOSPLIT,$24 // stderr MOVL $-12, 0(SP) MOVL SP, BP CALL *runtime·_GetStdHandle(SB) MOVL BP, SP MOVL AX, 0(SP) // handle MOVL $runtime·badsignalmsg(SB), DX // pointer MOVL DX, 4(SP) MOVL runtime·badsignallen(SB), DX // count MOVL DX, 8(SP) LEAL 20(SP), DX // written count MOVL $0, 0(DX) MOVL DX, 12(SP) MOVL $0, 16(SP) // overlapped CALL *runtime·_WriteFile(SB) MOVL BP, SI RET // faster get/set last error TEXT runtime·getlasterror(SB),NOSPLIT,$0 MOVL 0x34(FS), AX MOVL AX, ret+0(FP) RET TEXT runtime·setlasterror(SB),NOSPLIT,$0 MOVL err+0(FP), AX MOVL AX, 0x34(FS) RET // Called by Windows as a Vectored Exception Handler (VEH). // First argument is pointer to struct containing // exception record and context pointers. // Handler function is stored in AX. // Return 0 for 'not handled', -1 for handled. TEXT sigtramp<>(SB),NOSPLIT,$0-0 MOVL ptrs+0(FP), CX SUBL $40, SP // save callee-saved registers MOVL BX, 28(SP) MOVL BP, 16(SP) MOVL SI, 20(SP) MOVL DI, 24(SP) MOVL AX, SI // save handler address // find g get_tls(DX) CMPL DX, $0 JNE 3(PC) MOVL $0, AX // continue JMP done MOVL g(DX), DX CMPL DX, $0 JNE 2(PC) CALL runtime·badsignal2(SB) // save g and SP in case of stack switch MOVL DX, 32(SP) // g MOVL SP, 36(SP) // do we need to switch to the g0 stack? MOVL g_m(DX), BX MOVL m_g0(BX), BX CMPL DX, BX JEQ g0 // switch to the g0 stack get_tls(BP) MOVL BX, g(BP) MOVL (g_sched+gobuf_sp)(BX), DI // make it look like mstart called us on g0, to stop traceback SUBL $4, DI MOVL $runtime·mstart(SB), 0(DI) // traceback will think that we've done SUBL // on this stack, so subtract them here to match. // (we need room for sighandler arguments anyway). // and re-save old SP for restoring later. SUBL $40, DI MOVL SP, 36(DI) MOVL DI, SP g0: MOVL 0(CX), BX // ExceptionRecord* MOVL 4(CX), CX // Context* MOVL BX, 0(SP) MOVL CX, 4(SP) MOVL DX, 8(SP) CALL SI // call handler // AX is set to report result back to Windows MOVL 12(SP), AX // switch back to original stack and g // no-op if we never left. MOVL 36(SP), SP MOVL 32(SP), DX get_tls(BP) MOVL DX, g(BP) done: // restore callee-saved registers MOVL 24(SP), DI MOVL 20(SP), SI MOVL 16(SP), BP MOVL 28(SP), BX ADDL $40, SP // RET 4 (return and pop 4 bytes parameters) BYTE $0xC2; WORD $4 RET // unreached; make assembler happy TEXT runtime·exceptiontramp(SB),NOSPLIT,$0 MOVL $runtime·exceptionhandler(SB), AX JMP sigtramp<>(SB) TEXT runtime·firstcontinuetramp(SB),NOSPLIT,$0-0 // is never called INT $3 TEXT runtime·lastcontinuetramp(SB),NOSPLIT,$0-0 MOVL $runtime·lastcontinuehandler(SB), AX JMP sigtramp<>(SB) // Called by OS using stdcall ABI: bool ctrlhandler(uint32). TEXT runtime·ctrlhandler(SB),NOSPLIT,$0 PUSHL $runtime·ctrlhandler1(SB) NOP SP // tell vet SP changed - stop checking offsets CALL runtime·externalthreadhandler(SB) MOVL 4(SP), CX ADDL $12, SP JMP CX // Called by OS using stdcall ABI: uint32 profileloop(void*). TEXT runtime·profileloop(SB),NOSPLIT,$0 PUSHL $runtime·profileloop1(SB) NOP SP // tell vet SP changed - stop checking offsets CALL runtime·externalthreadhandler(SB) MOVL 4(SP), CX ADDL $12, SP JMP CX TEXT runtime·externalthreadhandler(SB),NOSPLIT,$0 PUSHL BP MOVL SP, BP PUSHL BX PUSHL SI PUSHL DI PUSHL 0x14(FS) MOVL SP, DX // setup dummy m, g SUBL $m__size, SP // space for M MOVL SP, 0(SP) MOVL $m__size, 4(SP) CALL runtime·memclrNoHeapPointers(SB) // smashes AX,BX,CX LEAL m_tls(SP), CX MOVL CX, 0x14(FS) MOVL SP, BX SUBL $g__size, SP // space for G MOVL SP, g(CX) MOVL SP, m_g0(BX) MOVL SP, 0(SP) MOVL $g__size, 4(SP) CALL runtime·memclrNoHeapPointers(SB) // smashes AX,BX,CX LEAL g__size(SP), BX MOVL BX, g_m(SP) LEAL -32768(SP), CX // must be less than SizeOfStackReserve set by linker MOVL CX, (g_stack+stack_lo)(SP) ADDL $const__StackGuard, CX MOVL CX, g_stackguard0(SP) MOVL CX, g_stackguard1(SP) MOVL DX, (g_stack+stack_hi)(SP) PUSHL AX // room for return value PUSHL 16(BP) // arg for handler CALL 8(BP) POPL CX POPL AX // pass return value to Windows in AX get_tls(CX) MOVL g(CX), CX MOVL (g_stack+stack_hi)(CX), SP POPL 0x14(FS) POPL DI POPL SI POPL BX POPL BP RET GLOBL runtime·cbctxts(SB), NOPTR, $4 TEXT runtime·callbackasm1(SB),NOSPLIT,$0 MOVL 0(SP), AX // will use to find our callback context // remove return address from stack, we are not returning there ADDL $4, SP // address to callback parameters into CX LEAL 4(SP), CX // save registers as required for windows callback PUSHL DI PUSHL SI PUSHL BP PUSHL BX // determine index into runtime·cbctxts table SUBL $runtime·callbackasm(SB), AX MOVL $0, DX MOVL $5, BX // divide by 5 because each call instruction in runtime·callbacks is 5 bytes long DIVL BX // find correspondent runtime·cbctxts table entry MOVL runtime·cbctxts(SB), BX MOVL -4(BX)(AX*4), BX // extract callback context MOVL wincallbackcontext_gobody(BX), AX MOVL wincallbackcontext_argsize(BX), DX // preserve whatever's at the memory location that // the callback will use to store the return value PUSHL 0(CX)(DX*1) // extend argsize by size of return value ADDL $4, DX // remember how to restore stack on return MOVL wincallbackcontext_restorestack(BX), BX PUSHL BX // call target Go function PUSHL DX // argsize (including return value) PUSHL CX // callback parameters PUSHL AX // address of target Go function CLD CALL runtime·cgocallback_gofunc(SB) POPL AX POPL CX POPL DX // how to restore stack on return POPL BX // return value into AX (as per Windows spec) // and restore previously preserved value MOVL -4(CX)(DX*1), AX POPL -4(CX)(DX*1) MOVL BX, CX // cannot use BX anymore // restore registers as required for windows callback POPL BX POPL BP POPL SI POPL DI // remove callback parameters before return (as per Windows spec) POPL DX ADDL CX, SP PUSHL DX CLD RET // void tstart(M *newm); TEXT tstart<>(SB),NOSPLIT,$0 MOVL newm+0(FP), CX // m MOVL m_g0(CX), DX // g // Layout new m scheduler stack on os stack. MOVL SP, AX MOVL AX, (g_stack+stack_hi)(DX) SUBL $(64*1024), AX // initial stack size (adjusted later) MOVL AX, (g_stack+stack_lo)(DX) ADDL $const__StackGuard, AX MOVL AX, g_stackguard0(DX) MOVL AX, g_stackguard1(DX) // Set up tls. LEAL m_tls(CX), SI MOVL SI, 0x14(FS) MOVL CX, g_m(DX) MOVL DX, g(SI) // Someday the convention will be D is always cleared. CLD CALL runtime·stackcheck(SB) // clobbers AX,CX CALL runtime·mstart(SB) RET // uint32 tstart_stdcall(M *newm); TEXT runtime·tstart_stdcall(SB),NOSPLIT,$0 MOVL newm+0(FP), BX PUSHL BX CALL tstart<>(SB) POPL BX // Adjust stack for stdcall to return properly. MOVL (SP), AX // save return address ADDL $4, SP // remove single parameter MOVL AX, (SP) // restore return address XORL AX, AX // return 0 == success RET // setldt(int entry, int address, int limit) TEXT runtime·setldt(SB),NOSPLIT,$0 MOVL base+4(FP), CX MOVL CX, 0x14(FS) RET // onosstack calls fn on OS stack. // func onosstack(fn unsafe.Pointer, arg uint32) TEXT runtime·onosstack(SB),NOSPLIT,$0 MOVL fn+0(FP), AX // to hide from 8l MOVL arg+4(FP), BX // Execute call on m->g0 stack, in case we are not actually // calling a system call wrapper, like when running under WINE. get_tls(CX) CMPL CX, $0 JNE 3(PC) // Not a Go-managed thread. Do not switch stack. CALL AX RET MOVL g(CX), BP MOVL g_m(BP), BP // leave pc/sp for cpu profiler MOVL (SP), SI MOVL SI, m_libcallpc(BP) MOVL g(CX), SI MOVL SI, m_libcallg(BP) // sp must be the last, because once async cpu profiler finds // all three values to be non-zero, it will use them LEAL fn+0(FP), SI MOVL SI, m_libcallsp(BP) MOVL m_g0(BP), SI CMPL g(CX), SI JNE switch // executing on m->g0 already CALL AX JMP ret switch: // Switch to m->g0 stack and back. MOVL (g_sched+gobuf_sp)(SI), SI MOVL SP, -4(SI) LEAL -4(SI), SP CALL AX MOVL 0(SP), SP ret: get_tls(CX) MOVL g(CX), BP MOVL g_m(BP), BP MOVL $0, m_libcallsp(BP) RET // Runs on OS stack. duration (in 100ns units) is in BX. TEXT runtime·usleep2(SB),NOSPLIT,$20 // Want negative 100ns units. NEGL BX MOVL $-1, hi-4(SP) MOVL BX, lo-8(SP) LEAL lo-8(SP), BX MOVL BX, ptime-12(SP) MOVL $0, alertable-16(SP) MOVL $-1, handle-20(SP) MOVL SP, BP MOVL runtime·_NtWaitForSingleObject(SB), AX CALL AX MOVL BP, SP RET // Runs on OS stack. TEXT runtime·switchtothread(SB),NOSPLIT,$0 MOVL SP, BP MOVL runtime·_SwitchToThread(SB), AX CALL AX MOVL BP, SP RET // See https://www.dcl.hpi.uni-potsdam.de/research/WRK/2007/08/getting-os-information-the-kuser_shared_data-structure/ // Must read hi1, then lo, then hi2. The snapshot is valid if hi1 == hi2. #define _INTERRUPT_TIME 0x7ffe0008 #define _SYSTEM_TIME 0x7ffe0014 #define time_lo 0 #define time_hi1 4 #define time_hi2 8 TEXT runtime·nanotime1(SB),NOSPLIT,$0-8 CMPB runtime·useQPCTime(SB), $0 JNE useQPC loop: MOVL (_INTERRUPT_TIME+time_hi1), AX MOVL (_INTERRUPT_TIME+time_lo), CX MOVL (_INTERRUPT_TIME+time_hi2), DI CMPL AX, DI JNE loop // wintime = DI:CX, multiply by 100 MOVL $100, AX MULL CX IMULL $100, DI ADDL DI, DX // wintime*100 = DX:AX MOVL AX, ret_lo+0(FP) MOVL DX, ret_hi+4(FP) RET useQPC: JMP runtime·nanotimeQPC(SB) RET TEXT time·now(SB),NOSPLIT,$0-20 CMPB runtime·useQPCTime(SB), $0 JNE useQPC loop: MOVL (_INTERRUPT_TIME+time_hi1), AX MOVL (_INTERRUPT_TIME+time_lo), CX MOVL (_INTERRUPT_TIME+time_hi2), DI CMPL AX, DI JNE loop // w = DI:CX // multiply by 100 MOVL $100, AX MULL CX IMULL $100, DI ADDL DI, DX // w*100 = DX:AX MOVL AX, mono+12(FP) MOVL DX, mono+16(FP) wall: MOVL (_SYSTEM_TIME+time_hi1), CX MOVL (_SYSTEM_TIME+time_lo), AX MOVL (_SYSTEM_TIME+time_hi2), DX CMPL CX, DX JNE wall // w = DX:AX // convert to Unix epoch (but still 100ns units) #define delta 116444736000000000 SUBL $(delta & 0xFFFFFFFF), AX SBBL $(delta >> 32), DX // nano/100 = DX:AX // split into two decimal halves by div 1e9. // (decimal point is two spots over from correct place, // but we avoid overflow in the high word.) MOVL $1000000000, CX DIVL CX MOVL AX, DI MOVL DX, SI // DI = nano/100/1e9 = nano/1e11 = sec/100, DX = SI = nano/100%1e9 // split DX into seconds and nanoseconds by div 1e7 magic multiply. MOVL DX, AX MOVL $1801439851, CX MULL CX SHRL $22, DX MOVL DX, BX IMULL $10000000, DX MOVL SI, CX SUBL DX, CX // DI = sec/100 (still) // BX = (nano/100%1e9)/1e7 = (nano/1e9)%100 = sec%100 // CX = (nano/100%1e9)%1e7 = (nano%1e9)/100 = nsec/100 // store nsec for return IMULL $100, CX MOVL CX, nsec+8(FP) // DI = sec/100 (still) // BX = sec%100 // construct DX:AX = 64-bit sec and store for return MOVL $0, DX MOVL $100, AX MULL DI ADDL BX, AX ADCL $0, DX MOVL AX, sec+0(FP) MOVL DX, sec+4(FP) RET useQPC: JMP runtime·nowQPC(SB) RET
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