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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 : type.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. // Runtime type representation. package runtime import "unsafe" // tflag is documented in reflect/type.go. // // tflag values must be kept in sync with copies in: // cmd/compile/internal/gc/reflect.go // cmd/link/internal/ld/decodesym.go // reflect/type.go // internal/reflectlite/type.go type tflag uint8 const ( tflagUncommon tflag = 1 << 0 tflagExtraStar tflag = 1 << 1 tflagNamed tflag = 1 << 2 tflagRegularMemory tflag = 1 << 3 // equal and hash can treat values of this type as a single region of t.size bytes ) // Needs to be in sync with ../cmd/link/internal/ld/decodesym.go:/^func.commonsize, // ../cmd/compile/internal/gc/reflect.go:/^func.dcommontype and // ../reflect/type.go:/^type.rtype. // ../internal/reflectlite/type.go:/^type.rtype. type _type struct { size uintptr ptrdata uintptr // size of memory prefix holding all pointers hash uint32 tflag tflag align uint8 fieldAlign uint8 kind uint8 // function for comparing objects of this type // (ptr to object A, ptr to object B) -> ==? equal func(unsafe.Pointer, unsafe.Pointer) bool // gcdata stores the GC type data for the garbage collector. // If the KindGCProg bit is set in kind, gcdata is a GC program. // Otherwise it is a ptrmask bitmap. See mbitmap.go for details. gcdata *byte str nameOff ptrToThis typeOff } func (t *_type) string() string { s := t.nameOff(t.str).name() if t.tflag&tflagExtraStar != 0 { return s[1:] } return s } func (t *_type) uncommon() *uncommontype { if t.tflag&tflagUncommon == 0 { return nil } switch t.kind & kindMask { case kindStruct: type u struct { structtype u uncommontype } return &(*u)(unsafe.Pointer(t)).u case kindPtr: type u struct { ptrtype u uncommontype } return &(*u)(unsafe.Pointer(t)).u case kindFunc: type u struct { functype u uncommontype } return &(*u)(unsafe.Pointer(t)).u case kindSlice: type u struct { slicetype u uncommontype } return &(*u)(unsafe.Pointer(t)).u case kindArray: type u struct { arraytype u uncommontype } return &(*u)(unsafe.Pointer(t)).u case kindChan: type u struct { chantype u uncommontype } return &(*u)(unsafe.Pointer(t)).u case kindMap: type u struct { maptype u uncommontype } return &(*u)(unsafe.Pointer(t)).u case kindInterface: type u struct { interfacetype u uncommontype } return &(*u)(unsafe.Pointer(t)).u default: type u struct { _type u uncommontype } return &(*u)(unsafe.Pointer(t)).u } } func (t *_type) name() string { if t.tflag&tflagNamed == 0 { return "" } s := t.string() i := len(s) - 1 for i >= 0 && s[i] != '.' { i-- } return s[i+1:] } // pkgpath returns the path of the package where t was defined, if // available. This is not the same as the reflect package's PkgPath // method, in that it returns the package path for struct and interface // types, not just named types. func (t *_type) pkgpath() string { if u := t.uncommon(); u != nil { return t.nameOff(u.pkgpath).name() } switch t.kind & kindMask { case kindStruct: st := (*structtype)(unsafe.Pointer(t)) return st.pkgPath.name() case kindInterface: it := (*interfacetype)(unsafe.Pointer(t)) return it.pkgpath.name() } return "" } // reflectOffs holds type offsets defined at run time by the reflect package. // // When a type is defined at run time, its *rtype data lives on the heap. // There are a wide range of possible addresses the heap may use, that // may not be representable as a 32-bit offset. Moreover the GC may // one day start moving heap memory, in which case there is no stable // offset that can be defined. // // To provide stable offsets, we add pin *rtype objects in a global map // and treat the offset as an identifier. We use negative offsets that // do not overlap with any compile-time module offsets. // // Entries are created by reflect.addReflectOff. var reflectOffs struct { lock mutex next int32 m map[int32]unsafe.Pointer minv map[unsafe.Pointer]int32 } func reflectOffsLock() { lock(&reflectOffs.lock) if raceenabled { raceacquire(unsafe.Pointer(&reflectOffs.lock)) } } func reflectOffsUnlock() { if raceenabled { racerelease(unsafe.Pointer(&reflectOffs.lock)) } unlock(&reflectOffs.lock) } func resolveNameOff(ptrInModule unsafe.Pointer, off nameOff) name { if off == 0 { return name{} } base := uintptr(ptrInModule) for md := &firstmoduledata; md != nil; md = md.next { if base >= md.types && base < md.etypes { res := md.types + uintptr(off) if res > md.etypes { println("runtime: nameOff", hex(off), "out of range", hex(md.types), "-", hex(md.etypes)) throw("runtime: name offset out of range") } return name{(*byte)(unsafe.Pointer(res))} } } // No module found. see if it is a run time name. reflectOffsLock() res, found := reflectOffs.m[int32(off)] reflectOffsUnlock() if !found { println("runtime: nameOff", hex(off), "base", hex(base), "not in ranges:") for next := &firstmoduledata; next != nil; next = next.next { println("\ttypes", hex(next.types), "etypes", hex(next.etypes)) } throw("runtime: name offset base pointer out of range") } return name{(*byte)(res)} } func (t *_type) nameOff(off nameOff) name { return resolveNameOff(unsafe.Pointer(t), off) } func resolveTypeOff(ptrInModule unsafe.Pointer, off typeOff) *_type { if off == 0 { return nil } base := uintptr(ptrInModule) var md *moduledata for next := &firstmoduledata; next != nil; next = next.next { if base >= next.types && base < next.etypes { md = next break } } if md == nil { reflectOffsLock() res := reflectOffs.m[int32(off)] reflectOffsUnlock() if res == nil { println("runtime: typeOff", hex(off), "base", hex(base), "not in ranges:") for next := &firstmoduledata; next != nil; next = next.next { println("\ttypes", hex(next.types), "etypes", hex(next.etypes)) } throw("runtime: type offset base pointer out of range") } return (*_type)(res) } if t := md.typemap[off]; t != nil { return t } res := md.types + uintptr(off) if res > md.etypes { println("runtime: typeOff", hex(off), "out of range", hex(md.types), "-", hex(md.etypes)) throw("runtime: type offset out of range") } return (*_type)(unsafe.Pointer(res)) } func (t *_type) typeOff(off typeOff) *_type { return resolveTypeOff(unsafe.Pointer(t), off) } func (t *_type) textOff(off textOff) unsafe.Pointer { base := uintptr(unsafe.Pointer(t)) var md *moduledata for next := &firstmoduledata; next != nil; next = next.next { if base >= next.types && base < next.etypes { md = next break } } if md == nil { reflectOffsLock() res := reflectOffs.m[int32(off)] reflectOffsUnlock() if res == nil { println("runtime: textOff", hex(off), "base", hex(base), "not in ranges:") for next := &firstmoduledata; next != nil; next = next.next { println("\ttypes", hex(next.types), "etypes", hex(next.etypes)) } throw("runtime: text offset base pointer out of range") } return res } res := uintptr(0) // The text, or instruction stream is generated as one large buffer. The off (offset) for a method is // its offset within this buffer. If the total text size gets too large, there can be issues on platforms like ppc64 if // the target of calls are too far for the call instruction. To resolve the large text issue, the text is split // into multiple text sections to allow the linker to generate long calls when necessary. When this happens, the vaddr // for each text section is set to its offset within the text. Each method's offset is compared against the section // vaddrs and sizes to determine the containing section. Then the section relative offset is added to the section's // relocated baseaddr to compute the method addess. if len(md.textsectmap) > 1 { for i := range md.textsectmap { sectaddr := md.textsectmap[i].vaddr sectlen := md.textsectmap[i].length if uintptr(off) >= sectaddr && uintptr(off) < sectaddr+sectlen { res = md.textsectmap[i].baseaddr + uintptr(off) - uintptr(md.textsectmap[i].vaddr) break } } } else { // single text section res = md.text + uintptr(off) } if res > md.etext && GOARCH != "wasm" { // on wasm, functions do not live in the same address space as the linear memory println("runtime: textOff", hex(off), "out of range", hex(md.text), "-", hex(md.etext)) throw("runtime: text offset out of range") } return unsafe.Pointer(res) } func (t *functype) in() []*_type { // See funcType in reflect/type.go for details on data layout. uadd := uintptr(unsafe.Sizeof(functype{})) if t.typ.tflag&tflagUncommon != 0 { uadd += unsafe.Sizeof(uncommontype{}) } return (*[1 << 20]*_type)(add(unsafe.Pointer(t), uadd))[:t.inCount] } func (t *functype) out() []*_type { // See funcType in reflect/type.go for details on data layout. uadd := uintptr(unsafe.Sizeof(functype{})) if t.typ.tflag&tflagUncommon != 0 { uadd += unsafe.Sizeof(uncommontype{}) } outCount := t.outCount & (1<<15 - 1) return (*[1 << 20]*_type)(add(unsafe.Pointer(t), uadd))[t.inCount : t.inCount+outCount] } func (t *functype) dotdotdot() bool { return t.outCount&(1<<15) != 0 } type nameOff int32 type typeOff int32 type textOff int32 type method struct { name nameOff mtyp typeOff ifn textOff tfn textOff } type uncommontype struct { pkgpath nameOff mcount uint16 // number of methods xcount uint16 // number of exported methods moff uint32 // offset from this uncommontype to [mcount]method _ uint32 // unused } type imethod struct { name nameOff ityp typeOff } type interfacetype struct { typ _type pkgpath name mhdr []imethod } type maptype struct { typ _type key *_type elem *_type bucket *_type // internal type representing a hash bucket // function for hashing keys (ptr to key, seed) -> hash hasher func(unsafe.Pointer, uintptr) uintptr keysize uint8 // size of key slot elemsize uint8 // size of elem slot bucketsize uint16 // size of bucket flags uint32 } // Note: flag values must match those used in the TMAP case // in ../cmd/compile/internal/gc/reflect.go:dtypesym. func (mt *maptype) indirectkey() bool { // store ptr to key instead of key itself return mt.flags&1 != 0 } func (mt *maptype) indirectelem() bool { // store ptr to elem instead of elem itself return mt.flags&2 != 0 } func (mt *maptype) reflexivekey() bool { // true if k==k for all keys return mt.flags&4 != 0 } func (mt *maptype) needkeyupdate() bool { // true if we need to update key on an overwrite return mt.flags&8 != 0 } func (mt *maptype) hashMightPanic() bool { // true if hash function might panic return mt.flags&16 != 0 } type arraytype struct { typ _type elem *_type slice *_type len uintptr } type chantype struct { typ _type elem *_type dir uintptr } type slicetype struct { typ _type elem *_type } type functype struct { typ _type inCount uint16 outCount uint16 } type ptrtype struct { typ _type elem *_type } type structfield struct { name name typ *_type offsetAnon uintptr } func (f *structfield) offset() uintptr { return f.offsetAnon >> 1 } type structtype struct { typ _type pkgPath name fields []structfield } // name is an encoded type name with optional extra data. // See reflect/type.go for details. type name struct { bytes *byte } func (n name) data(off int) *byte { return (*byte)(add(unsafe.Pointer(n.bytes), uintptr(off))) } func (n name) isExported() bool { return (*n.bytes)&(1<<0) != 0 } func (n name) nameLen() int { return int(uint16(*n.data(1))<<8 | uint16(*n.data(2))) } func (n name) tagLen() int { if *n.data(0)&(1<<1) == 0 { return 0 } off := 3 + n.nameLen() return int(uint16(*n.data(off))<<8 | uint16(*n.data(off + 1))) } func (n name) name() (s string) { if n.bytes == nil { return "" } nl := n.nameLen() if nl == 0 { return "" } hdr := (*stringStruct)(unsafe.Pointer(&s)) hdr.str = unsafe.Pointer(n.data(3)) hdr.len = nl return s } func (n name) tag() (s string) { tl := n.tagLen() if tl == 0 { return "" } nl := n.nameLen() hdr := (*stringStruct)(unsafe.Pointer(&s)) hdr.str = unsafe.Pointer(n.data(3 + nl + 2)) hdr.len = tl return s } func (n name) pkgPath() string { if n.bytes == nil || *n.data(0)&(1<<2) == 0 { return "" } off := 3 + n.nameLen() if tl := n.tagLen(); tl > 0 { off += 2 + tl } var nameOff nameOff copy((*[4]byte)(unsafe.Pointer(&nameOff))[:], (*[4]byte)(unsafe.Pointer(n.data(off)))[:]) pkgPathName := resolveNameOff(unsafe.Pointer(n.bytes), nameOff) return pkgPathName.name() } func (n name) isBlank() bool { if n.bytes == nil { return false } if n.nameLen() != 1 { return false } return *n.data(3) == '_' } // typelinksinit scans the types from extra modules and builds the // moduledata typemap used to de-duplicate type pointers. func typelinksinit() { if firstmoduledata.next == nil { return } typehash := make(map[uint32][]*_type, len(firstmoduledata.typelinks)) modules := activeModules() prev := modules[0] for _, md := range modules[1:] { // Collect types from the previous module into typehash. collect: for _, tl := range prev.typelinks { var t *_type if prev.typemap == nil { t = (*_type)(unsafe.Pointer(prev.types + uintptr(tl))) } else { t = prev.typemap[typeOff(tl)] } // Add to typehash if not seen before. tlist := typehash[t.hash] for _, tcur := range tlist { if tcur == t { continue collect } } typehash[t.hash] = append(tlist, t) } if md.typemap == nil { // If any of this module's typelinks match a type from a // prior module, prefer that prior type by adding the offset // to this module's typemap. tm := make(map[typeOff]*_type, len(md.typelinks)) pinnedTypemaps = append(pinnedTypemaps, tm) md.typemap = tm for _, tl := range md.typelinks { t := (*_type)(unsafe.Pointer(md.types + uintptr(tl))) for _, candidate := range typehash[t.hash] { seen := map[_typePair]struct{}{} if typesEqual(t, candidate, seen) { t = candidate break } } md.typemap[typeOff(tl)] = t } } prev = md } } type _typePair struct { t1 *_type t2 *_type } // typesEqual reports whether two types are equal. // // Everywhere in the runtime and reflect packages, it is assumed that // there is exactly one *_type per Go type, so that pointer equality // can be used to test if types are equal. There is one place that // breaks this assumption: buildmode=shared. In this case a type can // appear as two different pieces of memory. This is hidden from the // runtime and reflect package by the per-module typemap built in // typelinksinit. It uses typesEqual to map types from later modules // back into earlier ones. // // Only typelinksinit needs this function. func typesEqual(t, v *_type, seen map[_typePair]struct{}) bool { tp := _typePair{t, v} if _, ok := seen[tp]; ok { return true } // mark these types as seen, and thus equivalent which prevents an infinite loop if // the two types are identical, but recursively defined and loaded from // different modules seen[tp] = struct{}{} if t == v { return true } kind := t.kind & kindMask if kind != v.kind&kindMask { return false } if t.string() != v.string() { return false } ut := t.uncommon() uv := v.uncommon() if ut != nil || uv != nil { if ut == nil || uv == nil { return false } pkgpatht := t.nameOff(ut.pkgpath).name() pkgpathv := v.nameOff(uv.pkgpath).name() if pkgpatht != pkgpathv { return false } } if kindBool <= kind && kind <= kindComplex128 { return true } switch kind { case kindString, kindUnsafePointer: return true case kindArray: at := (*arraytype)(unsafe.Pointer(t)) av := (*arraytype)(unsafe.Pointer(v)) return typesEqual(at.elem, av.elem, seen) && at.len == av.len case kindChan: ct := (*chantype)(unsafe.Pointer(t)) cv := (*chantype)(unsafe.Pointer(v)) return ct.dir == cv.dir && typesEqual(ct.elem, cv.elem, seen) case kindFunc: ft := (*functype)(unsafe.Pointer(t)) fv := (*functype)(unsafe.Pointer(v)) if ft.outCount != fv.outCount || ft.inCount != fv.inCount { return false } tin, vin := ft.in(), fv.in() for i := 0; i < len(tin); i++ { if !typesEqual(tin[i], vin[i], seen) { return false } } tout, vout := ft.out(), fv.out() for i := 0; i < len(tout); i++ { if !typesEqual(tout[i], vout[i], seen) { return false } } return true case kindInterface: it := (*interfacetype)(unsafe.Pointer(t)) iv := (*interfacetype)(unsafe.Pointer(v)) if it.pkgpath.name() != iv.pkgpath.name() { return false } if len(it.mhdr) != len(iv.mhdr) { return false } for i := range it.mhdr { tm := &it.mhdr[i] vm := &iv.mhdr[i] // Note the mhdr array can be relocated from // another module. See #17724. tname := resolveNameOff(unsafe.Pointer(tm), tm.name) vname := resolveNameOff(unsafe.Pointer(vm), vm.name) if tname.name() != vname.name() { return false } if tname.pkgPath() != vname.pkgPath() { return false } tityp := resolveTypeOff(unsafe.Pointer(tm), tm.ityp) vityp := resolveTypeOff(unsafe.Pointer(vm), vm.ityp) if !typesEqual(tityp, vityp, seen) { return false } } return true case kindMap: mt := (*maptype)(unsafe.Pointer(t)) mv := (*maptype)(unsafe.Pointer(v)) return typesEqual(mt.key, mv.key, seen) && typesEqual(mt.elem, mv.elem, seen) case kindPtr: pt := (*ptrtype)(unsafe.Pointer(t)) pv := (*ptrtype)(unsafe.Pointer(v)) return typesEqual(pt.elem, pv.elem, seen) case kindSlice: st := (*slicetype)(unsafe.Pointer(t)) sv := (*slicetype)(unsafe.Pointer(v)) return typesEqual(st.elem, sv.elem, seen) case kindStruct: st := (*structtype)(unsafe.Pointer(t)) sv := (*structtype)(unsafe.Pointer(v)) if len(st.fields) != len(sv.fields) { return false } if st.pkgPath.name() != sv.pkgPath.name() { return false } for i := range st.fields { tf := &st.fields[i] vf := &sv.fields[i] if tf.name.name() != vf.name.name() { return false } if !typesEqual(tf.typ, vf.typ, seen) { return false } if tf.name.tag() != vf.name.tag() { return false } if tf.offsetAnon != vf.offsetAnon { return false } } return true default: println("runtime: impossible type kind", kind) throw("runtime: impossible type kind") return false } }
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