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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 : heapdump.go
// Copyright 2014 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. // Implementation of runtime/debug.WriteHeapDump. Writes all // objects in the heap plus additional info (roots, threads, // finalizers, etc.) to a file. // The format of the dumped file is described at // https://golang.org/s/go15heapdump. package runtime import ( "runtime/internal/sys" "unsafe" ) //go:linkname runtime_debug_WriteHeapDump runtime/debug.WriteHeapDump func runtime_debug_WriteHeapDump(fd uintptr) { stopTheWorld("write heap dump") systemstack(func() { writeheapdump_m(fd) }) startTheWorld() } const ( fieldKindEol = 0 fieldKindPtr = 1 fieldKindIface = 2 fieldKindEface = 3 tagEOF = 0 tagObject = 1 tagOtherRoot = 2 tagType = 3 tagGoroutine = 4 tagStackFrame = 5 tagParams = 6 tagFinalizer = 7 tagItab = 8 tagOSThread = 9 tagMemStats = 10 tagQueuedFinalizer = 11 tagData = 12 tagBSS = 13 tagDefer = 14 tagPanic = 15 tagMemProf = 16 tagAllocSample = 17 ) var dumpfd uintptr // fd to write the dump to. var tmpbuf []byte // buffer of pending write data const ( bufSize = 4096 ) var buf [bufSize]byte var nbuf uintptr func dwrite(data unsafe.Pointer, len uintptr) { if len == 0 { return } if nbuf+len <= bufSize { copy(buf[nbuf:], (*[bufSize]byte)(data)[:len]) nbuf += len return } write(dumpfd, unsafe.Pointer(&buf), int32(nbuf)) if len >= bufSize { write(dumpfd, data, int32(len)) nbuf = 0 } else { copy(buf[:], (*[bufSize]byte)(data)[:len]) nbuf = len } } func dwritebyte(b byte) { dwrite(unsafe.Pointer(&b), 1) } func flush() { write(dumpfd, unsafe.Pointer(&buf), int32(nbuf)) nbuf = 0 } // Cache of types that have been serialized already. // We use a type's hash field to pick a bucket. // Inside a bucket, we keep a list of types that // have been serialized so far, most recently used first. // Note: when a bucket overflows we may end up // serializing a type more than once. That's ok. const ( typeCacheBuckets = 256 typeCacheAssoc = 4 ) type typeCacheBucket struct { t [typeCacheAssoc]*_type } var typecache [typeCacheBuckets]typeCacheBucket // dump a uint64 in a varint format parseable by encoding/binary func dumpint(v uint64) { var buf [10]byte var n int for v >= 0x80 { buf[n] = byte(v | 0x80) n++ v >>= 7 } buf[n] = byte(v) n++ dwrite(unsafe.Pointer(&buf), uintptr(n)) } func dumpbool(b bool) { if b { dumpint(1) } else { dumpint(0) } } // dump varint uint64 length followed by memory contents func dumpmemrange(data unsafe.Pointer, len uintptr) { dumpint(uint64(len)) dwrite(data, len) } func dumpslice(b []byte) { dumpint(uint64(len(b))) if len(b) > 0 { dwrite(unsafe.Pointer(&b[0]), uintptr(len(b))) } } func dumpstr(s string) { sp := stringStructOf(&s) dumpmemrange(sp.str, uintptr(sp.len)) } // dump information for a type func dumptype(t *_type) { if t == nil { return } // If we've definitely serialized the type before, // no need to do it again. b := &typecache[t.hash&(typeCacheBuckets-1)] if t == b.t[0] { return } for i := 1; i < typeCacheAssoc; i++ { if t == b.t[i] { // Move-to-front for j := i; j > 0; j-- { b.t[j] = b.t[j-1] } b.t[0] = t return } } // Might not have been dumped yet. Dump it and // remember we did so. for j := typeCacheAssoc - 1; j > 0; j-- { b.t[j] = b.t[j-1] } b.t[0] = t // dump the type dumpint(tagType) dumpint(uint64(uintptr(unsafe.Pointer(t)))) dumpint(uint64(t.size)) if x := t.uncommon(); x == nil || t.nameOff(x.pkgpath).name() == "" { dumpstr(t.string()) } else { pkgpathstr := t.nameOff(x.pkgpath).name() pkgpath := stringStructOf(&pkgpathstr) namestr := t.name() name := stringStructOf(&namestr) dumpint(uint64(uintptr(pkgpath.len) + 1 + uintptr(name.len))) dwrite(pkgpath.str, uintptr(pkgpath.len)) dwritebyte('.') dwrite(name.str, uintptr(name.len)) } dumpbool(t.kind&kindDirectIface == 0 || t.ptrdata != 0) } // dump an object func dumpobj(obj unsafe.Pointer, size uintptr, bv bitvector) { dumpint(tagObject) dumpint(uint64(uintptr(obj))) dumpmemrange(obj, size) dumpfields(bv) } func dumpotherroot(description string, to unsafe.Pointer) { dumpint(tagOtherRoot) dumpstr(description) dumpint(uint64(uintptr(to))) } func dumpfinalizer(obj unsafe.Pointer, fn *funcval, fint *_type, ot *ptrtype) { dumpint(tagFinalizer) dumpint(uint64(uintptr(obj))) dumpint(uint64(uintptr(unsafe.Pointer(fn)))) dumpint(uint64(uintptr(unsafe.Pointer(fn.fn)))) dumpint(uint64(uintptr(unsafe.Pointer(fint)))) dumpint(uint64(uintptr(unsafe.Pointer(ot)))) } type childInfo struct { // Information passed up from the callee frame about // the layout of the outargs region. argoff uintptr // where the arguments start in the frame arglen uintptr // size of args region args bitvector // if args.n >= 0, pointer map of args region sp *uint8 // callee sp depth uintptr // depth in call stack (0 == most recent) } // dump kinds & offsets of interesting fields in bv func dumpbv(cbv *bitvector, offset uintptr) { for i := uintptr(0); i < uintptr(cbv.n); i++ { if cbv.ptrbit(i) == 1 { dumpint(fieldKindPtr) dumpint(uint64(offset + i*sys.PtrSize)) } } } func dumpframe(s *stkframe, arg unsafe.Pointer) bool { child := (*childInfo)(arg) f := s.fn // Figure out what we can about our stack map pc := s.pc pcdata := int32(-1) // Use the entry map at function entry if pc != f.entry { pc-- pcdata = pcdatavalue(f, _PCDATA_StackMapIndex, pc, nil) } if pcdata == -1 { // We do not have a valid pcdata value but there might be a // stackmap for this function. It is likely that we are looking // at the function prologue, assume so and hope for the best. pcdata = 0 } stkmap := (*stackmap)(funcdata(f, _FUNCDATA_LocalsPointerMaps)) var bv bitvector if stkmap != nil && stkmap.n > 0 { bv = stackmapdata(stkmap, pcdata) } else { bv.n = -1 } // Dump main body of stack frame. dumpint(tagStackFrame) dumpint(uint64(s.sp)) // lowest address in frame dumpint(uint64(child.depth)) // # of frames deep on the stack dumpint(uint64(uintptr(unsafe.Pointer(child.sp)))) // sp of child, or 0 if bottom of stack dumpmemrange(unsafe.Pointer(s.sp), s.fp-s.sp) // frame contents dumpint(uint64(f.entry)) dumpint(uint64(s.pc)) dumpint(uint64(s.continpc)) name := funcname(f) if name == "" { name = "unknown function" } dumpstr(name) // Dump fields in the outargs section if child.args.n >= 0 { dumpbv(&child.args, child.argoff) } else { // conservative - everything might be a pointer for off := child.argoff; off < child.argoff+child.arglen; off += sys.PtrSize { dumpint(fieldKindPtr) dumpint(uint64(off)) } } // Dump fields in the local vars section if stkmap == nil { // No locals information, dump everything. for off := child.arglen; off < s.varp-s.sp; off += sys.PtrSize { dumpint(fieldKindPtr) dumpint(uint64(off)) } } else if stkmap.n < 0 { // Locals size information, dump just the locals. size := uintptr(-stkmap.n) for off := s.varp - size - s.sp; off < s.varp-s.sp; off += sys.PtrSize { dumpint(fieldKindPtr) dumpint(uint64(off)) } } else if stkmap.n > 0 { // Locals bitmap information, scan just the pointers in // locals. dumpbv(&bv, s.varp-uintptr(bv.n)*sys.PtrSize-s.sp) } dumpint(fieldKindEol) // Record arg info for parent. child.argoff = s.argp - s.fp child.arglen = s.arglen child.sp = (*uint8)(unsafe.Pointer(s.sp)) child.depth++ stkmap = (*stackmap)(funcdata(f, _FUNCDATA_ArgsPointerMaps)) if stkmap != nil { child.args = stackmapdata(stkmap, pcdata) } else { child.args.n = -1 } return true } func dumpgoroutine(gp *g) { var sp, pc, lr uintptr if gp.syscallsp != 0 { sp = gp.syscallsp pc = gp.syscallpc lr = 0 } else { sp = gp.sched.sp pc = gp.sched.pc lr = gp.sched.lr } dumpint(tagGoroutine) dumpint(uint64(uintptr(unsafe.Pointer(gp)))) dumpint(uint64(sp)) dumpint(uint64(gp.goid)) dumpint(uint64(gp.gopc)) dumpint(uint64(readgstatus(gp))) dumpbool(isSystemGoroutine(gp, false)) dumpbool(false) // isbackground dumpint(uint64(gp.waitsince)) dumpstr(gp.waitreason.String()) dumpint(uint64(uintptr(gp.sched.ctxt))) dumpint(uint64(uintptr(unsafe.Pointer(gp.m)))) dumpint(uint64(uintptr(unsafe.Pointer(gp._defer)))) dumpint(uint64(uintptr(unsafe.Pointer(gp._panic)))) // dump stack var child childInfo child.args.n = -1 child.arglen = 0 child.sp = nil child.depth = 0 gentraceback(pc, sp, lr, gp, 0, nil, 0x7fffffff, dumpframe, noescape(unsafe.Pointer(&child)), 0) // dump defer & panic records for d := gp._defer; d != nil; d = d.link { dumpint(tagDefer) dumpint(uint64(uintptr(unsafe.Pointer(d)))) dumpint(uint64(uintptr(unsafe.Pointer(gp)))) dumpint(uint64(d.sp)) dumpint(uint64(d.pc)) dumpint(uint64(uintptr(unsafe.Pointer(d.fn)))) if d.fn == nil { // d.fn can be nil for open-coded defers dumpint(uint64(0)) } else { dumpint(uint64(uintptr(unsafe.Pointer(d.fn.fn)))) } dumpint(uint64(uintptr(unsafe.Pointer(d.link)))) } for p := gp._panic; p != nil; p = p.link { dumpint(tagPanic) dumpint(uint64(uintptr(unsafe.Pointer(p)))) dumpint(uint64(uintptr(unsafe.Pointer(gp)))) eface := efaceOf(&p.arg) dumpint(uint64(uintptr(unsafe.Pointer(eface._type)))) dumpint(uint64(uintptr(unsafe.Pointer(eface.data)))) dumpint(0) // was p->defer, no longer recorded dumpint(uint64(uintptr(unsafe.Pointer(p.link)))) } } func dumpgs() { // goroutines & stacks for i := 0; uintptr(i) < allglen; i++ { gp := allgs[i] status := readgstatus(gp) // The world is stopped so gp will not be in a scan state. switch status { default: print("runtime: unexpected G.status ", hex(status), "\n") throw("dumpgs in STW - bad status") case _Gdead: // ok case _Grunnable, _Gsyscall, _Gwaiting: dumpgoroutine(gp) } } } func finq_callback(fn *funcval, obj unsafe.Pointer, nret uintptr, fint *_type, ot *ptrtype) { dumpint(tagQueuedFinalizer) dumpint(uint64(uintptr(obj))) dumpint(uint64(uintptr(unsafe.Pointer(fn)))) dumpint(uint64(uintptr(unsafe.Pointer(fn.fn)))) dumpint(uint64(uintptr(unsafe.Pointer(fint)))) dumpint(uint64(uintptr(unsafe.Pointer(ot)))) } func dumproots() { // TODO(mwhudson): dump datamask etc from all objects // data segment dumpint(tagData) dumpint(uint64(firstmoduledata.data)) dumpmemrange(unsafe.Pointer(firstmoduledata.data), firstmoduledata.edata-firstmoduledata.data) dumpfields(firstmoduledata.gcdatamask) // bss segment dumpint(tagBSS) dumpint(uint64(firstmoduledata.bss)) dumpmemrange(unsafe.Pointer(firstmoduledata.bss), firstmoduledata.ebss-firstmoduledata.bss) dumpfields(firstmoduledata.gcbssmask) // mspan.types for _, s := range mheap_.allspans { if s.state.get() == mSpanInUse { // Finalizers for sp := s.specials; sp != nil; sp = sp.next { if sp.kind != _KindSpecialFinalizer { continue } spf := (*specialfinalizer)(unsafe.Pointer(sp)) p := unsafe.Pointer(s.base() + uintptr(spf.special.offset)) dumpfinalizer(p, spf.fn, spf.fint, spf.ot) } } } // Finalizer queue iterate_finq(finq_callback) } // Bit vector of free marks. // Needs to be as big as the largest number of objects per span. var freemark [_PageSize / 8]bool func dumpobjs() { for _, s := range mheap_.allspans { if s.state.get() != mSpanInUse { continue } p := s.base() size := s.elemsize n := (s.npages << _PageShift) / size if n > uintptr(len(freemark)) { throw("freemark array doesn't have enough entries") } for freeIndex := uintptr(0); freeIndex < s.nelems; freeIndex++ { if s.isFree(freeIndex) { freemark[freeIndex] = true } } for j := uintptr(0); j < n; j, p = j+1, p+size { if freemark[j] { freemark[j] = false continue } dumpobj(unsafe.Pointer(p), size, makeheapobjbv(p, size)) } } } func dumpparams() { dumpint(tagParams) x := uintptr(1) if *(*byte)(unsafe.Pointer(&x)) == 1 { dumpbool(false) // little-endian ptrs } else { dumpbool(true) // big-endian ptrs } dumpint(sys.PtrSize) var arenaStart, arenaEnd uintptr for i1 := range mheap_.arenas { if mheap_.arenas[i1] == nil { continue } for i, ha := range mheap_.arenas[i1] { if ha == nil { continue } base := arenaBase(arenaIdx(i1)<<arenaL1Shift | arenaIdx(i)) if arenaStart == 0 || base < arenaStart { arenaStart = base } if base+heapArenaBytes > arenaEnd { arenaEnd = base + heapArenaBytes } } } dumpint(uint64(arenaStart)) dumpint(uint64(arenaEnd)) dumpstr(sys.GOARCH) dumpstr(sys.Goexperiment) dumpint(uint64(ncpu)) } func itab_callback(tab *itab) { t := tab._type dumptype(t) dumpint(tagItab) dumpint(uint64(uintptr(unsafe.Pointer(tab)))) dumpint(uint64(uintptr(unsafe.Pointer(t)))) } func dumpitabs() { iterate_itabs(itab_callback) } func dumpms() { for mp := allm; mp != nil; mp = mp.alllink { dumpint(tagOSThread) dumpint(uint64(uintptr(unsafe.Pointer(mp)))) dumpint(uint64(mp.id)) dumpint(mp.procid) } } func dumpmemstats() { dumpint(tagMemStats) dumpint(memstats.alloc) dumpint(memstats.total_alloc) dumpint(memstats.sys) dumpint(memstats.nlookup) dumpint(memstats.nmalloc) dumpint(memstats.nfree) dumpint(memstats.heap_alloc) dumpint(memstats.heap_sys) dumpint(memstats.heap_idle) dumpint(memstats.heap_inuse) dumpint(memstats.heap_released) dumpint(memstats.heap_objects) dumpint(memstats.stacks_inuse) dumpint(memstats.stacks_sys) dumpint(memstats.mspan_inuse) dumpint(memstats.mspan_sys) dumpint(memstats.mcache_inuse) dumpint(memstats.mcache_sys) dumpint(memstats.buckhash_sys) dumpint(memstats.gc_sys) dumpint(memstats.other_sys) dumpint(memstats.next_gc) dumpint(memstats.last_gc_unix) dumpint(memstats.pause_total_ns) for i := 0; i < 256; i++ { dumpint(memstats.pause_ns[i]) } dumpint(uint64(memstats.numgc)) } func dumpmemprof_callback(b *bucket, nstk uintptr, pstk *uintptr, size, allocs, frees uintptr) { stk := (*[100000]uintptr)(unsafe.Pointer(pstk)) dumpint(tagMemProf) dumpint(uint64(uintptr(unsafe.Pointer(b)))) dumpint(uint64(size)) dumpint(uint64(nstk)) for i := uintptr(0); i < nstk; i++ { pc := stk[i] f := findfunc(pc) if !f.valid() { var buf [64]byte n := len(buf) n-- buf[n] = ')' if pc == 0 { n-- buf[n] = '0' } else { for pc > 0 { n-- buf[n] = "0123456789abcdef"[pc&15] pc >>= 4 } } n-- buf[n] = 'x' n-- buf[n] = '0' n-- buf[n] = '(' dumpslice(buf[n:]) dumpstr("?") dumpint(0) } else { dumpstr(funcname(f)) if i > 0 && pc > f.entry { pc-- } file, line := funcline(f, pc) dumpstr(file) dumpint(uint64(line)) } } dumpint(uint64(allocs)) dumpint(uint64(frees)) } func dumpmemprof() { iterate_memprof(dumpmemprof_callback) for _, s := range mheap_.allspans { if s.state.get() != mSpanInUse { continue } for sp := s.specials; sp != nil; sp = sp.next { if sp.kind != _KindSpecialProfile { continue } spp := (*specialprofile)(unsafe.Pointer(sp)) p := s.base() + uintptr(spp.special.offset) dumpint(tagAllocSample) dumpint(uint64(p)) dumpint(uint64(uintptr(unsafe.Pointer(spp.b)))) } } } var dumphdr = []byte("go1.7 heap dump\n") func mdump() { // make sure we're done sweeping for _, s := range mheap_.allspans { if s.state.get() == mSpanInUse { s.ensureSwept() } } memclrNoHeapPointers(unsafe.Pointer(&typecache), unsafe.Sizeof(typecache)) dwrite(unsafe.Pointer(&dumphdr[0]), uintptr(len(dumphdr))) dumpparams() dumpitabs() dumpobjs() dumpgs() dumpms() dumproots() dumpmemstats() dumpmemprof() dumpint(tagEOF) flush() } func writeheapdump_m(fd uintptr) { _g_ := getg() casgstatus(_g_.m.curg, _Grunning, _Gwaiting) _g_.waitreason = waitReasonDumpingHeap // Update stats so we can dump them. // As a side effect, flushes all the mcaches so the mspan.freelist // lists contain all the free objects. updatememstats() // Set dump file. dumpfd = fd // Call dump routine. mdump() // Reset dump file. dumpfd = 0 if tmpbuf != nil { sysFree(unsafe.Pointer(&tmpbuf[0]), uintptr(len(tmpbuf)), &memstats.other_sys) tmpbuf = nil } casgstatus(_g_.m.curg, _Gwaiting, _Grunning) } // dumpint() the kind & offset of each field in an object. func dumpfields(bv bitvector) { dumpbv(&bv, 0) dumpint(fieldKindEol) } func makeheapobjbv(p uintptr, size uintptr) bitvector { // Extend the temp buffer if necessary. nptr := size / sys.PtrSize if uintptr(len(tmpbuf)) < nptr/8+1 { if tmpbuf != nil { sysFree(unsafe.Pointer(&tmpbuf[0]), uintptr(len(tmpbuf)), &memstats.other_sys) } n := nptr/8 + 1 p := sysAlloc(n, &memstats.other_sys) if p == nil { throw("heapdump: out of memory") } tmpbuf = (*[1 << 30]byte)(p)[:n] } // Convert heap bitmap to pointer bitmap. for i := uintptr(0); i < nptr/8+1; i++ { tmpbuf[i] = 0 } i := uintptr(0) hbits := heapBitsForAddr(p) for ; i < nptr; i++ { if i != 1 && !hbits.morePointers() { break // end of object } if hbits.isPointer() { tmpbuf[i/8] |= 1 << (i % 8) } hbits = hbits.next() } return bitvector{int32(i), &tmpbuf[0]} }
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