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golang
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1.22.0
/
src
/
runtime
/
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..
📄
HACKING.md
(13.85 KB)
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Makefile
(178 B)
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abi_test.go
(2.83 KB)
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alg.go
(10.99 KB)
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align_runtime_test.go
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align_test.go
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arena.go
(31.66 KB)
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arena_test.go
(13.39 KB)
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asan
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asan.go
(1.55 KB)
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asan0.go
(760 B)
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asan_amd64.s
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asan_arm64.s
(2.14 KB)
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asan_loong64.s
(2.12 KB)
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asan_ppc64le.s
(2.75 KB)
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asan_riscv64.s
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asm.s
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asm_386.s
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asm_amd64.h
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asm_amd64.s
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asm_arm.s
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asm_arm64.s
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asm_loong64.s
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asm_mips64x.s
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asm_mipsx.s
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asm_ppc64x.h
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asm_ppc64x.s
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asm_riscv64.s
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asm_s390x.s
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asm_wasm.s
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atomic_arm64.s
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atomic_loong64.s
(245 B)
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atomic_mips64x.s
(300 B)
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atomic_mipsx.s
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atomic_pointer.go
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atomic_ppc64x.s
(437 B)
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atomic_riscv64.s
(275 B)
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auxv_none.go
(298 B)
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callers_test.go
(12.13 KB)
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cgo
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cgo.go
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cgo_mmap.go
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cgo_ppc64x.go
(418 B)
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cgo_sigaction.go
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cgocall.go
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cgocallback.go
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cgocheck.go
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chan.go
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chan_test.go
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chanbarrier_test.go
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checkptr.go
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checkptr_test.go
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closure_test.go
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compiler.go
(410 B)
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complex.go
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complex_test.go
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conv_wasm_test.go
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coro.go
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coverage
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covercounter.go
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covermeta.go
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cpuflags.go
(810 B)
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cpuflags_amd64.go
(533 B)
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cpuflags_arm64.go
(312 B)
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cpuprof.go
(7.94 KB)
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cputicks.go
(437 B)
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crash_cgo_test.go
(23.35 KB)
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crash_test.go
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crash_unix_test.go
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create_file_nounix.go
(305 B)
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create_file_unix.go
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debug
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debug.go
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debug_test.go
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debugcall.go
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debuglog.go
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debuglog_off.go
(357 B)
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debuglog_on.go
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debuglog_test.go
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defer_test.go
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defs1_linux.go
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defs1_netbsd_386.go
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defs1_netbsd_amd64.go
(3.14 KB)
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defs1_netbsd_arm.go
(3.03 KB)
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defs1_netbsd_arm64.go
(3.25 KB)
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defs1_solaris_amd64.go
(4.01 KB)
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defs2_linux.go
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defs3_linux.go
(1.09 KB)
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defs_aix.go
(4.17 KB)
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defs_aix_ppc64.go
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defs_arm_linux.go
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defs_darwin.go
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defs_darwin_amd64.go
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defs_darwin_arm64.go
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defs_dragonfly.go
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defs_dragonfly_amd64.go
(3.41 KB)
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defs_freebsd.go
(3.96 KB)
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defs_freebsd_386.go
(4.52 KB)
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defs_freebsd_amd64.go
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defs_freebsd_arm.go
(3.92 KB)
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defs_freebsd_arm64.go
(4.18 KB)
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defs_freebsd_riscv64.go
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defs_illumos_amd64.go
(285 B)
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defs_linux.go
(2.92 KB)
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defs_linux_386.go
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defs_linux_amd64.go
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defs_linux_arm.go
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defs_linux_arm64.go
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defs_linux_loong64.go
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defs_linux_mips64x.go
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defs_linux_mipsx.go
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defs_linux_ppc64.go
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defs_linux_ppc64le.go
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defs_linux_riscv64.go
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defs_linux_s390x.go
(3.16 KB)
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defs_netbsd.go
(2.83 KB)
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defs_netbsd_386.go
(855 B)
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defs_netbsd_amd64.go
(1.01 KB)
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defs_netbsd_arm.go
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defs_openbsd.go
(3.06 KB)
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defs_openbsd_386.go
(2.91 KB)
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defs_openbsd_amd64.go
(3.11 KB)
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defs_openbsd_arm.go
(3.03 KB)
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defs_openbsd_arm64.go
(2.78 KB)
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defs_openbsd_mips64.go
(2.75 KB)
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defs_openbsd_ppc64.go
(3 KB)
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defs_openbsd_riscv64.go
(2.89 KB)
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defs_plan9_386.go
(1.63 KB)
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defs_plan9_amd64.go
(1.82 KB)
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defs_plan9_arm.go
(1.73 KB)
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defs_solaris.go
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defs_solaris_amd64.go
(1004 B)
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defs_windows.go
(2.25 KB)
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defs_windows_386.go
(2.28 KB)
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defs_windows_amd64.go
(3.19 KB)
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defs_windows_arm.go
(2.57 KB)
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defs_windows_arm64.go
(3.07 KB)
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duff_386.s
(8.24 KB)
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duff_amd64.s
(5.64 KB)
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duff_arm.s
(7.11 KB)
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duff_arm64.s
(5.27 KB)
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duff_loong64.s
(11.9 KB)
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duff_mips64x.s
(11.28 KB)
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duff_ppc64x.s
(7.06 KB)
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duff_riscv64.s
(11.4 KB)
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duff_s390x.s
(507 B)
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ehooks_test.go
(2.04 KB)
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env_plan9.go
(3 KB)
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env_posix.go
(1.56 KB)
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env_test.go
(1.16 KB)
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error.go
(9.29 KB)
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example_test.go
(1.55 KB)
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exithook.go
(2.32 KB)
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export_aix_test.go
(207 B)
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export_arm_test.go
(226 B)
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export_darwin_test.go
(207 B)
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export_debug_amd64_test.go
(3.6 KB)
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export_debug_arm64_test.go
(3.49 KB)
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export_debug_ppc64le_test.go
(3.5 KB)
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export_debug_test.go
(5.07 KB)
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export_debuglog_test.go
(1.27 KB)
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export_linux_test.go
(378 B)
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export_mmap_test.go
(429 B)
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export_pipe2_test.go
(310 B)
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export_pipe_test.go
(219 B)
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export_test.go
(50.52 KB)
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export_unix_test.go
(2.27 KB)
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export_windows_test.go
(903 B)
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extern.go
(18.58 KB)
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fastlog2.go
(1.22 KB)
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fastlog2_test.go
(784 B)
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fastlog2table.go
(904 B)
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fds_nonunix.go
(256 B)
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fds_test.go
(1.43 KB)
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fds_unix.go
(1.27 KB)
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float.go
(1.35 KB)
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float_test.go
(699 B)
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funcdata.h
(2.53 KB)
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gc_test.go
(20.32 KB)
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gcinfo_test.go
(5.95 KB)
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go_tls.h
(366 B)
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hash32.go
(1.58 KB)
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hash64.go
(1.95 KB)
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hash_test.go
(17.24 KB)
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heap_test.go
(529 B)
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heapdump.go
(17.88 KB)
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histogram.go
(7.3 KB)
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histogram_test.go
(3.51 KB)
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iface.go
(20.92 KB)
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iface_test.go
(7.45 KB)
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import_test.go
(1.42 KB)
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importx_test.go
(763 B)
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internal
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lfstack.go
(2.03 KB)
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lfstack_test.go
(2.74 KB)
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libfuzzer.go
(6.34 KB)
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libfuzzer_amd64.s
(5.03 KB)
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libfuzzer_arm64.s
(3.15 KB)
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lock_futex.go
(5.4 KB)
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lock_js.go
(7.28 KB)
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lock_sema.go
(6.75 KB)
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lock_wasip1.go
(2.01 KB)
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lockrank.go
(18.19 KB)
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lockrank_off.go
(1.17 KB)
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lockrank_on.go
(10.27 KB)
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lockrank_test.go
(856 B)
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malloc.go
(58.5 KB)
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malloc_test.go
(10.64 KB)
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map.go
(52.17 KB)
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map_benchmark_test.go
(10.59 KB)
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map_fast32.go
(12.74 KB)
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map_fast64.go
(12.92 KB)
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map_faststr.go
(14.32 KB)
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map_test.go
(31.75 KB)
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mbarrier.go
(13.78 KB)
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mbitmap.go
(22.54 KB)
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mbitmap_allocheaders.go
(44.67 KB)
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mbitmap_noallocheaders.go
(28.95 KB)
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mcache.go
(10 KB)
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mcentral.go
(8.05 KB)
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mcheckmark.go
(2.85 KB)
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mem.go
(6.72 KB)
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mem_aix.go
(2.01 KB)
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mem_bsd.go
(2.21 KB)
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mem_darwin.go
(1.96 KB)
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mem_js.go
(457 B)
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mem_linux.go
(4.98 KB)
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mem_plan9.go
(447 B)
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mem_sbrk.go
(4.19 KB)
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mem_wasip1.go
(392 B)
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mem_wasm.go
(488 B)
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mem_windows.go
(3.88 KB)
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memclr_386.s
(2.38 KB)
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memclr_amd64.s
(4.91 KB)
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memclr_arm.s
(2.6 KB)
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memclr_arm64.s
(3.62 KB)
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memclr_loong64.s
(843 B)
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memclr_mips64x.s
(1.72 KB)
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memclr_mipsx.s
(1.32 KB)
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memclr_plan9_386.s
(983 B)
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memclr_plan9_amd64.s
(511 B)
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memclr_ppc64x.s
(4.44 KB)
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memclr_riscv64.s
(1.71 KB)
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memclr_s390x.s
(1.96 KB)
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memclr_wasm.s
(485 B)
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memmove_386.s
(4.42 KB)
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memmove_amd64.s
(12.48 KB)
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memmove_arm.s
(5.9 KB)
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memmove_arm64.s
(5.96 KB)
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memmove_linux_amd64_test.go
(1.53 KB)
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memmove_loong64.s
(1.87 KB)
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memmove_mips64x.s
(1.83 KB)
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memmove_mipsx.s
(4.4 KB)
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memmove_plan9_386.s
(3.06 KB)
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memmove_plan9_amd64.s
(3.04 KB)
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memmove_ppc64x.s
(4.91 KB)
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memmove_riscv64.s
(5.46 KB)
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memmove_s390x.s
(2.92 KB)
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memmove_test.go
(21.23 KB)
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memmove_wasm.s
(479 B)
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metrics
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metrics.go
(26.01 KB)
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metrics_test.go
(42.46 KB)
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mfinal.go
(18.91 KB)
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mfinal_test.go
(5.57 KB)
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mfixalloc.go
(3.13 KB)
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mgc.go
(59.29 KB)
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mgclimit.go
(17.28 KB)
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mgclimit_test.go
(9.02 KB)
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mgcmark.go
(53.07 KB)
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mgcpacer.go
(55.36 KB)
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mgcpacer_test.go
(39.26 KB)
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mgcscavenge.go
(52.32 KB)
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mgcscavenge_test.go
(25.2 KB)
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mgcstack.go
(10.58 KB)
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mgcsweep.go
(32.26 KB)
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mgcwork.go
(12.89 KB)
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mheap.go
(72.64 KB)
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minmax.go
(1.46 KB)
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minmax_test.go
(3.31 KB)
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mkduff.go
(8.04 KB)
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mkfastlog2table.go
(3.08 KB)
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mklockrank.go
(9 KB)
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mkpreempt.go
(15.33 KB)
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mksizeclasses.go
(9.52 KB)
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mmap.go
(844 B)
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mpagealloc.go
(39.23 KB)
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mpagealloc_32bit.go
(4.56 KB)
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mpagealloc_64bit.go
(9.34 KB)
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mpagealloc_test.go
(32.59 KB)
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mpagecache.go
(5.59 KB)
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mpagecache_test.go
(10.79 KB)
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mpallocbits.go
(12.58 KB)
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mpallocbits_test.go
(13.69 KB)
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mprof.go
(47.4 KB)
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mranges.go
(14.46 KB)
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mranges_test.go
(5.68 KB)
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msan
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msan.go
(1.5 KB)
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msan0.go
(725 B)
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msan_amd64.s
(2.3 KB)
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msan_arm64.s
(1.98 KB)
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msan_loong64.s
(1.96 KB)
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msize_allocheaders.go
(1.32 KB)
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msize_noallocheaders.go
(915 B)
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mspanset.go
(13.12 KB)
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mstats.go
(33.81 KB)
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mwbbuf.go
(8.13 KB)
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nbpipe_pipe.go
(405 B)
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nbpipe_pipe2.go
(344 B)
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nbpipe_pipe_test.go
(706 B)
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nbpipe_test.go
(1.99 KB)
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net_plan9.go
(645 B)
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netpoll.go
(20.55 KB)
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netpoll_aix.go
(5.06 KB)
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netpoll_epoll.go
(4.4 KB)
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netpoll_fake.go
(664 B)
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netpoll_kqueue.go
(5.62 KB)
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netpoll_os_test.go
(520 B)
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netpoll_solaris.go
(11.2 KB)
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netpoll_stub.go
(1.48 KB)
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netpoll_wasip1.go
(6.08 KB)
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netpoll_windows.go
(4.01 KB)
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nonwindows_stub.go
(729 B)
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norace_linux_test.go
(915 B)
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norace_test.go
(983 B)
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numcpu_freebsd_test.go
(381 B)
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os2_aix.go
(20.88 KB)
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os2_freebsd.go
(302 B)
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os2_openbsd.go
(296 B)
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os2_plan9.go
(1.48 KB)
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os2_solaris.go
(320 B)
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os3_plan9.go
(3.94 KB)
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os3_solaris.go
(17.59 KB)
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os_aix.go
(8.89 KB)
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os_android.go
(463 B)
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os_darwin.go
(11.92 KB)
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os_darwin_arm64.go
(329 B)
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os_dragonfly.go
(7.14 KB)
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os_freebsd.go
(11.64 KB)
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os_freebsd2.go
(603 B)
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os_freebsd_amd64.go
(658 B)
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os_freebsd_arm.go
(1.45 KB)
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os_freebsd_arm64.go
(320 B)
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os_freebsd_noauxv.go
(241 B)
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os_freebsd_riscv64.go
(198 B)
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os_illumos.go
(3.93 KB)
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os_js.go
(767 B)
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os_linux.go
(25.71 KB)
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os_linux_arm.go
(1.51 KB)
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os_linux_arm64.go
(478 B)
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os_linux_be64.go
(806 B)
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os_linux_generic.go
(870 B)
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os_linux_loong64.go
(263 B)
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os_linux_mips64x.go
(996 B)
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os_linux_mipsx.go
(987 B)
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os_linux_noauxv.go
(337 B)
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os_linux_novdso.go
(347 B)
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os_linux_ppc64x.go
(526 B)
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os_linux_riscv64.go
(198 B)
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os_linux_s390x.go
(825 B)
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os_linux_x86.go
(234 B)
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os_netbsd.go
(10.12 KB)
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os_netbsd_386.go
(617 B)
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os_netbsd_amd64.go
(614 B)
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os_netbsd_arm.go
(1.07 KB)
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os_netbsd_arm64.go
(769 B)
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os_nonopenbsd.go
(437 B)
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os_only_solaris.go
(357 B)
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os_openbsd.go
(6.23 KB)
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os_openbsd_arm.go
(662 B)
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os_openbsd_arm64.go
(329 B)
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os_openbsd_libc.go
(1.49 KB)
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os_openbsd_mips64.go
(329 B)
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os_openbsd_syscall.go
(1.36 KB)
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os_openbsd_syscall1.go
(441 B)
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os_openbsd_syscall2.go
(2.51 KB)
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os_plan9.go
(10.18 KB)
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os_plan9_arm.go
(375 B)
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os_solaris.go
(6.62 KB)
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os_unix.go
(436 B)
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os_unix_nonlinux.go
(374 B)
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os_wasip1.go
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Editing: debug_test.go
// Copyright 2018 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. // TODO: This test could be implemented on all (most?) UNIXes if we // added syscall.Tgkill more widely. // We skip all of these tests under race mode because our test thread // spends all of its time in the race runtime, which isn't a safe // point. //go:build (amd64 || arm64 || ppc64le) && linux && !race package runtime_test import ( "fmt" "internal/abi" "math" "os" "regexp" "runtime" "runtime/debug" "sync/atomic" "syscall" "testing" ) func startDebugCallWorker(t *testing.T) (g *runtime.G, after func()) { // This can deadlock if run under a debugger because it // depends on catching SIGTRAP, which is usually swallowed by // a debugger. skipUnderDebugger(t) // This can deadlock if there aren't enough threads or if a GC // tries to interrupt an atomic loop (see issue #10958). Execute // an extra GC to ensure even the sweep phase is done (out of // caution to prevent #49370 from happening). // TODO(mknyszek): This extra GC cycle is likely unnecessary // because preemption (which may happen during the sweep phase) // isn't much of an issue anymore thanks to asynchronous preemption. // The biggest risk is having a write barrier in the debug call // injection test code fire, because it runs in a signal handler // and may not have a P. // // We use 8 Ps so there's room for the debug call worker, // something that's trying to preempt the call worker, and the // goroutine that's trying to stop the call worker. ogomaxprocs := runtime.GOMAXPROCS(8) ogcpercent := debug.SetGCPercent(-1) runtime.GC() // ready is a buffered channel so debugCallWorker won't block // on sending to it. This makes it less likely we'll catch // debugCallWorker while it's in the runtime. ready := make(chan *runtime.G, 1) var stop uint32 done := make(chan error) go debugCallWorker(ready, &stop, done) g = <-ready return g, func() { atomic.StoreUint32(&stop, 1) err := <-done if err != nil { t.Fatal(err) } runtime.GOMAXPROCS(ogomaxprocs) debug.SetGCPercent(ogcpercent) } } func debugCallWorker(ready chan<- *runtime.G, stop *uint32, done chan<- error) { runtime.LockOSThread() defer runtime.UnlockOSThread() ready <- runtime.Getg() x := 2 debugCallWorker2(stop, &x) if x != 1 { done <- fmt.Errorf("want x = 2, got %d; register pointer not adjusted?", x) } close(done) } // Don't inline this function, since we want to test adjusting // pointers in the arguments. // //go:noinline func debugCallWorker2(stop *uint32, x *int) { for atomic.LoadUint32(stop) == 0 { // Strongly encourage x to live in a register so we // can test pointer register adjustment. *x++ } *x = 1 } func debugCallTKill(tid int) error { return syscall.Tgkill(syscall.Getpid(), tid, syscall.SIGTRAP) } // skipUnderDebugger skips the current test when running under a // debugger (specifically if this process has a tracer). This is // Linux-specific. func skipUnderDebugger(t *testing.T) { pid := syscall.Getpid() status, err := os.ReadFile(fmt.Sprintf("/proc/%d/status", pid)) if err != nil { t.Logf("couldn't get proc tracer: %s", err) return } re := regexp.MustCompile(`TracerPid:\s+([0-9]+)`) sub := re.FindSubmatch(status) if sub == nil { t.Logf("couldn't find proc tracer PID") return } if string(sub[1]) == "0" { return } t.Skip("test will deadlock under a debugger") } func TestDebugCall(t *testing.T) { g, after := startDebugCallWorker(t) defer after() type stackArgs struct { x0 int x1 float64 y0Ret int y1Ret float64 } // Inject a call into the debugCallWorker goroutine and test // basic argument and result passing. fn := func(x int, y float64) (y0Ret int, y1Ret float64) { return x + 1, y + 1.0 } var args *stackArgs var regs abi.RegArgs intRegs := regs.Ints[:] floatRegs := regs.Floats[:] fval := float64(42.0) if len(intRegs) > 0 { intRegs[0] = 42 floatRegs[0] = math.Float64bits(fval) } else { args = &stackArgs{ x0: 42, x1: 42.0, } } if _, err := runtime.InjectDebugCall(g, fn, ®s, args, debugCallTKill, false); err != nil { t.Fatal(err) } var result0 int var result1 float64 if len(intRegs) > 0 { result0 = int(intRegs[0]) result1 = math.Float64frombits(floatRegs[0]) } else { result0 = args.y0Ret result1 = args.y1Ret } if result0 != 43 { t.Errorf("want 43, got %d", result0) } if result1 != fval+1 { t.Errorf("want 43, got %f", result1) } } func TestDebugCallLarge(t *testing.T) { g, after := startDebugCallWorker(t) defer after() // Inject a call with a large call frame. const N = 128 var args struct { in [N]int out [N]int } fn := func(in [N]int) (out [N]int) { for i := range in { out[i] = in[i] + 1 } return } var want [N]int for i := range args.in { args.in[i] = i want[i] = i + 1 } if _, err := runtime.InjectDebugCall(g, fn, nil, &args, debugCallTKill, false); err != nil { t.Fatal(err) } if want != args.out { t.Fatalf("want %v, got %v", want, args.out) } } func TestDebugCallGC(t *testing.T) { g, after := startDebugCallWorker(t) defer after() // Inject a call that performs a GC. if _, err := runtime.InjectDebugCall(g, runtime.GC, nil, nil, debugCallTKill, false); err != nil { t.Fatal(err) } } func TestDebugCallGrowStack(t *testing.T) { g, after := startDebugCallWorker(t) defer after() // Inject a call that grows the stack. debugCallWorker checks // for stack pointer breakage. if _, err := runtime.InjectDebugCall(g, func() { growStack(nil) }, nil, nil, debugCallTKill, false); err != nil { t.Fatal(err) } } //go:nosplit func debugCallUnsafePointWorker(gpp **runtime.G, ready, stop *uint32) { // The nosplit causes this function to not contain safe-points // except at calls. runtime.LockOSThread() defer runtime.UnlockOSThread() *gpp = runtime.Getg() for atomic.LoadUint32(stop) == 0 { atomic.StoreUint32(ready, 1) } } func TestDebugCallUnsafePoint(t *testing.T) { skipUnderDebugger(t) // This can deadlock if there aren't enough threads or if a GC // tries to interrupt an atomic loop (see issue #10958). defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(8)) // InjectDebugCall cannot be executed while a GC is actively in // progress. Wait until the current GC is done, and turn it off. // // See #49370. runtime.GC() defer debug.SetGCPercent(debug.SetGCPercent(-1)) // Test that the runtime refuses call injection at unsafe points. var g *runtime.G var ready, stop uint32 defer atomic.StoreUint32(&stop, 1) go debugCallUnsafePointWorker(&g, &ready, &stop) for atomic.LoadUint32(&ready) == 0 { runtime.Gosched() } _, err := runtime.InjectDebugCall(g, func() {}, nil, nil, debugCallTKill, true) if msg := "call not at safe point"; err == nil || err.Error() != msg { t.Fatalf("want %q, got %s", msg, err) } } func TestDebugCallPanic(t *testing.T) { skipUnderDebugger(t) // This can deadlock if there aren't enough threads. defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(8)) // InjectDebugCall cannot be executed while a GC is actively in // progress. Wait until the current GC is done, and turn it off. // // See #10958 and #49370. defer debug.SetGCPercent(debug.SetGCPercent(-1)) // TODO(mknyszek): This extra GC cycle is likely unnecessary // because preemption (which may happen during the sweep phase) // isn't much of an issue anymore thanks to asynchronous preemption. // The biggest risk is having a write barrier in the debug call // injection test code fire, because it runs in a signal handler // and may not have a P. runtime.GC() ready := make(chan *runtime.G) var stop uint32 defer atomic.StoreUint32(&stop, 1) go func() { runtime.LockOSThread() defer runtime.UnlockOSThread() ready <- runtime.Getg() for atomic.LoadUint32(&stop) == 0 { } }() g := <-ready p, err := runtime.InjectDebugCall(g, func() { panic("test") }, nil, nil, debugCallTKill, false) if err != nil { t.Fatal(err) } if ps, ok := p.(string); !ok || ps != "test" { t.Fatalf("wanted panic %v, got %v", "test", p) } }
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