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Current Path: /opt/golang/1.22.0/src/runtime

📁 ..
📄 HACKING.md(13.85 KB)
📄 Makefile(178 B)
📄 abi_test.go(2.83 KB)
📄 alg.go(10.99 KB)
📄 align_runtime_test.go(1.82 KB)
📄 align_test.go(5.37 KB)
📄 arena.go(31.66 KB)
📄 arena_test.go(13.39 KB)
📁 asan
📄 asan.go(1.55 KB)
📄 asan0.go(760 B)
📄 asan_amd64.s(2.45 KB)
📄 asan_arm64.s(2.14 KB)
📄 asan_loong64.s(2.12 KB)
📄 asan_ppc64le.s(2.75 KB)
📄 asan_riscv64.s(1.92 KB)
📄 asm.s(719 B)
📄 asm_386.s(42.54 KB)
📄 asm_amd64.h(631 B)
📄 asm_amd64.s(60.09 KB)
📄 asm_arm.s(31.58 KB)
📄 asm_arm64.s(43.33 KB)
📄 asm_loong64.s(27.58 KB)
📄 asm_mips64x.s(24.34 KB)
📄 asm_mipsx.s(25.82 KB)
📄 asm_ppc64x.h(1.93 KB)
📄 asm_ppc64x.s(45.19 KB)
📄 asm_riscv64.s(26.97 KB)
📄 asm_s390x.s(27.55 KB)
📄 asm_wasm.s(11.82 KB)
📄 atomic_arm64.s(259 B)
📄 atomic_loong64.s(245 B)
📄 atomic_mips64x.s(300 B)
📄 atomic_mipsx.s(262 B)
📄 atomic_pointer.go(3.66 KB)
📄 atomic_ppc64x.s(437 B)
📄 atomic_riscv64.s(275 B)
📄 auxv_none.go(298 B)
📄 callers_test.go(12.13 KB)
📁 cgo
📄 cgo.go(2.5 KB)
📄 cgo_mmap.go(2.42 KB)
📄 cgo_ppc64x.go(418 B)
📄 cgo_sigaction.go(3.28 KB)
📄 cgocall.go(23.23 KB)
📄 cgocallback.go(317 B)
📄 cgocheck.go(7.97 KB)
📄 chan.go(23.74 KB)
📄 chan_test.go(23.44 KB)
📄 chanbarrier_test.go(1.4 KB)
📄 checkptr.go(3.29 KB)
📄 checkptr_test.go(2.86 KB)
📄 closure_test.go(937 B)
📄 compiler.go(410 B)
📄 complex.go(1.59 KB)
📄 complex_test.go(1.05 KB)
📄 conv_wasm_test.go(2.96 KB)
📄 coro.go(4.92 KB)
📁 coverage
📄 covercounter.go(749 B)
📄 covermeta.go(2.4 KB)
📄 cpuflags.go(810 B)
📄 cpuflags_amd64.go(533 B)
📄 cpuflags_arm64.go(312 B)
📄 cpuprof.go(7.94 KB)
📄 cputicks.go(437 B)
📄 crash_cgo_test.go(23.35 KB)
📄 crash_test.go(23.12 KB)
📄 crash_unix_test.go(9.19 KB)
📄 create_file_nounix.go(305 B)
📄 create_file_unix.go(368 B)
📁 debug
📄 debug.go(3.53 KB)
📄 debug_test.go(7.99 KB)
📄 debugcall.go(6.75 KB)
📄 debuglog.go(18.24 KB)
📄 debuglog_off.go(357 B)
📄 debuglog_on.go(1.09 KB)
📄 debuglog_test.go(4.9 KB)
📄 defer_test.go(11.4 KB)
📄 defs1_linux.go(845 B)
📄 defs1_netbsd_386.go(2.91 KB)
📄 defs1_netbsd_amd64.go(3.14 KB)
📄 defs1_netbsd_arm.go(3.03 KB)
📄 defs1_netbsd_arm64.go(3.25 KB)
📄 defs1_solaris_amd64.go(4.01 KB)
📄 defs2_linux.go(3.22 KB)
📄 defs3_linux.go(1.09 KB)
📄 defs_aix.go(4.17 KB)
📄 defs_aix_ppc64.go(3.63 KB)
📄 defs_arm_linux.go(2.67 KB)
📄 defs_darwin.go(4.18 KB)
📄 defs_darwin_amd64.go(6.34 KB)
📄 defs_darwin_arm64.go(4.17 KB)
📄 defs_dragonfly.go(2.73 KB)
📄 defs_dragonfly_amd64.go(3.41 KB)
📄 defs_freebsd.go(3.96 KB)
📄 defs_freebsd_386.go(4.52 KB)
📄 defs_freebsd_amd64.go(4.79 KB)
📄 defs_freebsd_arm.go(3.92 KB)
📄 defs_freebsd_arm64.go(4.18 KB)
📄 defs_freebsd_riscv64.go(4.19 KB)
📄 defs_illumos_amd64.go(285 B)
📄 defs_linux.go(2.92 KB)
📄 defs_linux_386.go(4.2 KB)
📄 defs_linux_amd64.go(4.7 KB)
📄 defs_linux_arm.go(3.89 KB)
📄 defs_linux_arm64.go(3.62 KB)
📄 defs_linux_loong64.go(3.43 KB)
📄 defs_linux_mips64x.go(3.6 KB)
📄 defs_linux_mipsx.go(3.6 KB)
📄 defs_linux_ppc64.go(3.69 KB)
📄 defs_linux_ppc64le.go(3.69 KB)
📄 defs_linux_riscv64.go(3.81 KB)
📄 defs_linux_s390x.go(3.16 KB)
📄 defs_netbsd.go(2.83 KB)
📄 defs_netbsd_386.go(855 B)
📄 defs_netbsd_amd64.go(1.01 KB)
📄 defs_netbsd_arm.go(764 B)
📄 defs_openbsd.go(3.06 KB)
📄 defs_openbsd_386.go(2.91 KB)
📄 defs_openbsd_amd64.go(3.11 KB)
📄 defs_openbsd_arm.go(3.03 KB)
📄 defs_openbsd_arm64.go(2.78 KB)
📄 defs_openbsd_mips64.go(2.75 KB)
📄 defs_openbsd_ppc64.go(3 KB)
📄 defs_openbsd_riscv64.go(2.89 KB)
📄 defs_plan9_386.go(1.63 KB)
📄 defs_plan9_amd64.go(1.82 KB)
📄 defs_plan9_arm.go(1.73 KB)
📄 defs_solaris.go(3.32 KB)
📄 defs_solaris_amd64.go(1004 B)
📄 defs_windows.go(2.25 KB)
📄 defs_windows_386.go(2.28 KB)
📄 defs_windows_amd64.go(3.19 KB)
📄 defs_windows_arm.go(2.57 KB)
📄 defs_windows_arm64.go(3.07 KB)
📄 duff_386.s(8.24 KB)
📄 duff_amd64.s(5.64 KB)
📄 duff_arm.s(7.11 KB)
📄 duff_arm64.s(5.27 KB)
📄 duff_loong64.s(11.9 KB)
📄 duff_mips64x.s(11.28 KB)
📄 duff_ppc64x.s(7.06 KB)
📄 duff_riscv64.s(11.4 KB)
📄 duff_s390x.s(507 B)
📄 ehooks_test.go(2.04 KB)
📄 env_plan9.go(3 KB)
📄 env_posix.go(1.56 KB)
📄 env_test.go(1.16 KB)
📄 error.go(9.29 KB)
📄 example_test.go(1.55 KB)
📄 exithook.go(2.32 KB)
📄 export_aix_test.go(207 B)
📄 export_arm_test.go(226 B)
📄 export_darwin_test.go(207 B)
📄 export_debug_amd64_test.go(3.6 KB)
📄 export_debug_arm64_test.go(3.49 KB)
📄 export_debug_ppc64le_test.go(3.5 KB)
📄 export_debug_test.go(5.07 KB)
📄 export_debuglog_test.go(1.27 KB)
📄 export_linux_test.go(378 B)
📄 export_mmap_test.go(429 B)
📄 export_pipe2_test.go(310 B)
📄 export_pipe_test.go(219 B)
📄 export_test.go(50.52 KB)
📄 export_unix_test.go(2.27 KB)
📄 export_windows_test.go(903 B)
📄 extern.go(18.58 KB)
📄 fastlog2.go(1.22 KB)
📄 fastlog2_test.go(784 B)
📄 fastlog2table.go(904 B)
📄 fds_nonunix.go(256 B)
📄 fds_test.go(1.43 KB)
📄 fds_unix.go(1.27 KB)
📄 float.go(1.35 KB)
📄 float_test.go(699 B)
📄 funcdata.h(2.53 KB)
📄 gc_test.go(20.32 KB)
📄 gcinfo_test.go(5.95 KB)
📄 go_tls.h(366 B)
📄 hash32.go(1.58 KB)
📄 hash64.go(1.95 KB)
📄 hash_test.go(17.24 KB)
📄 heap_test.go(529 B)
📄 heapdump.go(17.88 KB)
📄 histogram.go(7.3 KB)
📄 histogram_test.go(3.51 KB)
📄 iface.go(20.92 KB)
📄 iface_test.go(7.45 KB)
📄 import_test.go(1.42 KB)
📄 importx_test.go(763 B)
📁 internal
📄 lfstack.go(2.03 KB)
📄 lfstack_test.go(2.74 KB)
📄 libfuzzer.go(6.34 KB)
📄 libfuzzer_amd64.s(5.03 KB)
📄 libfuzzer_arm64.s(3.15 KB)
📄 lock_futex.go(5.4 KB)
📄 lock_js.go(7.28 KB)
📄 lock_sema.go(6.75 KB)
📄 lock_wasip1.go(2.01 KB)
📄 lockrank.go(18.19 KB)
📄 lockrank_off.go(1.17 KB)
📄 lockrank_on.go(10.27 KB)
📄 lockrank_test.go(856 B)
📄 malloc.go(58.5 KB)
📄 malloc_test.go(10.64 KB)
📄 map.go(52.17 KB)
📄 map_benchmark_test.go(10.59 KB)
📄 map_fast32.go(12.74 KB)
📄 map_fast64.go(12.92 KB)
📄 map_faststr.go(14.32 KB)
📄 map_test.go(31.75 KB)
📄 mbarrier.go(13.78 KB)
📄 mbitmap.go(22.54 KB)
📄 mbitmap_allocheaders.go(44.67 KB)
📄 mbitmap_noallocheaders.go(28.95 KB)
📄 mcache.go(10 KB)
📄 mcentral.go(8.05 KB)
📄 mcheckmark.go(2.85 KB)
📄 mem.go(6.72 KB)
📄 mem_aix.go(2.01 KB)
📄 mem_bsd.go(2.21 KB)
📄 mem_darwin.go(1.96 KB)
📄 mem_js.go(457 B)
📄 mem_linux.go(4.98 KB)
📄 mem_plan9.go(447 B)
📄 mem_sbrk.go(4.19 KB)
📄 mem_wasip1.go(392 B)
📄 mem_wasm.go(488 B)
📄 mem_windows.go(3.88 KB)
📄 memclr_386.s(2.38 KB)
📄 memclr_amd64.s(4.91 KB)
📄 memclr_arm.s(2.6 KB)
📄 memclr_arm64.s(3.62 KB)
📄 memclr_loong64.s(843 B)
📄 memclr_mips64x.s(1.72 KB)
📄 memclr_mipsx.s(1.32 KB)
📄 memclr_plan9_386.s(983 B)
📄 memclr_plan9_amd64.s(511 B)
📄 memclr_ppc64x.s(4.44 KB)
📄 memclr_riscv64.s(1.71 KB)
📄 memclr_s390x.s(1.96 KB)
📄 memclr_wasm.s(485 B)
📄 memmove_386.s(4.42 KB)
📄 memmove_amd64.s(12.48 KB)
📄 memmove_arm.s(5.9 KB)
📄 memmove_arm64.s(5.96 KB)
📄 memmove_linux_amd64_test.go(1.53 KB)
📄 memmove_loong64.s(1.87 KB)
📄 memmove_mips64x.s(1.83 KB)
📄 memmove_mipsx.s(4.4 KB)
📄 memmove_plan9_386.s(3.06 KB)
📄 memmove_plan9_amd64.s(3.04 KB)
📄 memmove_ppc64x.s(4.91 KB)
📄 memmove_riscv64.s(5.46 KB)
📄 memmove_s390x.s(2.92 KB)
📄 memmove_test.go(21.23 KB)
📄 memmove_wasm.s(479 B)
📁 metrics
📄 metrics.go(26.01 KB)
📄 metrics_test.go(42.46 KB)
📄 mfinal.go(18.91 KB)
📄 mfinal_test.go(5.57 KB)
📄 mfixalloc.go(3.13 KB)
📄 mgc.go(59.29 KB)
📄 mgclimit.go(17.28 KB)
📄 mgclimit_test.go(9.02 KB)
📄 mgcmark.go(53.07 KB)
📄 mgcpacer.go(55.36 KB)
📄 mgcpacer_test.go(39.26 KB)
📄 mgcscavenge.go(52.32 KB)
📄 mgcscavenge_test.go(25.2 KB)
📄 mgcstack.go(10.58 KB)
📄 mgcsweep.go(32.26 KB)
📄 mgcwork.go(12.89 KB)
📄 mheap.go(72.64 KB)
📄 minmax.go(1.46 KB)
📄 minmax_test.go(3.31 KB)
📄 mkduff.go(8.04 KB)
📄 mkfastlog2table.go(3.08 KB)
📄 mklockrank.go(9 KB)
📄 mkpreempt.go(15.33 KB)
📄 mksizeclasses.go(9.52 KB)
📄 mmap.go(844 B)
📄 mpagealloc.go(39.23 KB)
📄 mpagealloc_32bit.go(4.56 KB)
📄 mpagealloc_64bit.go(9.34 KB)
📄 mpagealloc_test.go(32.59 KB)
📄 mpagecache.go(5.59 KB)
📄 mpagecache_test.go(10.79 KB)
📄 mpallocbits.go(12.58 KB)
📄 mpallocbits_test.go(13.69 KB)
📄 mprof.go(47.4 KB)
📄 mranges.go(14.46 KB)
📄 mranges_test.go(5.68 KB)
📁 msan
📄 msan.go(1.5 KB)
📄 msan0.go(725 B)
📄 msan_amd64.s(2.3 KB)
📄 msan_arm64.s(1.98 KB)
📄 msan_loong64.s(1.96 KB)
📄 msize_allocheaders.go(1.32 KB)
📄 msize_noallocheaders.go(915 B)
📄 mspanset.go(13.12 KB)
📄 mstats.go(33.81 KB)
📄 mwbbuf.go(8.13 KB)
📄 nbpipe_pipe.go(405 B)
📄 nbpipe_pipe2.go(344 B)
📄 nbpipe_pipe_test.go(706 B)
📄 nbpipe_test.go(1.99 KB)
📄 net_plan9.go(645 B)
📄 netpoll.go(20.55 KB)
📄 netpoll_aix.go(5.06 KB)
📄 netpoll_epoll.go(4.4 KB)
📄 netpoll_fake.go(664 B)
📄 netpoll_kqueue.go(5.62 KB)
📄 netpoll_os_test.go(520 B)
📄 netpoll_solaris.go(11.2 KB)
📄 netpoll_stub.go(1.48 KB)
📄 netpoll_wasip1.go(6.08 KB)
📄 netpoll_windows.go(4.01 KB)
📄 nonwindows_stub.go(729 B)
📄 norace_linux_test.go(915 B)
📄 norace_test.go(983 B)
📄 numcpu_freebsd_test.go(381 B)
📄 os2_aix.go(20.88 KB)
📄 os2_freebsd.go(302 B)
📄 os2_openbsd.go(296 B)
📄 os2_plan9.go(1.48 KB)
📄 os2_solaris.go(320 B)
📄 os3_plan9.go(3.94 KB)
📄 os3_solaris.go(17.59 KB)
📄 os_aix.go(8.89 KB)
📄 os_android.go(463 B)
📄 os_darwin.go(11.92 KB)
📄 os_darwin_arm64.go(329 B)
📄 os_dragonfly.go(7.14 KB)
📄 os_freebsd.go(11.64 KB)
📄 os_freebsd2.go(603 B)
📄 os_freebsd_amd64.go(658 B)
📄 os_freebsd_arm.go(1.45 KB)
📄 os_freebsd_arm64.go(320 B)
📄 os_freebsd_noauxv.go(241 B)
📄 os_freebsd_riscv64.go(198 B)
📄 os_illumos.go(3.93 KB)
📄 os_js.go(767 B)
📄 os_linux.go(25.71 KB)
📄 os_linux_arm.go(1.51 KB)
📄 os_linux_arm64.go(478 B)
📄 os_linux_be64.go(806 B)
📄 os_linux_generic.go(870 B)
📄 os_linux_loong64.go(263 B)
📄 os_linux_mips64x.go(996 B)
📄 os_linux_mipsx.go(987 B)
📄 os_linux_noauxv.go(337 B)
📄 os_linux_novdso.go(347 B)
📄 os_linux_ppc64x.go(526 B)
📄 os_linux_riscv64.go(198 B)
📄 os_linux_s390x.go(825 B)
📄 os_linux_x86.go(234 B)
📄 os_netbsd.go(10.12 KB)
📄 os_netbsd_386.go(617 B)
📄 os_netbsd_amd64.go(614 B)
📄 os_netbsd_arm.go(1.07 KB)
📄 os_netbsd_arm64.go(769 B)
📄 os_nonopenbsd.go(437 B)
📄 os_only_solaris.go(357 B)
📄 os_openbsd.go(6.23 KB)
📄 os_openbsd_arm.go(662 B)
📄 os_openbsd_arm64.go(329 B)
📄 os_openbsd_libc.go(1.49 KB)
📄 os_openbsd_mips64.go(329 B)
📄 os_openbsd_syscall.go(1.36 KB)
📄 os_openbsd_syscall1.go(441 B)
📄 os_openbsd_syscall2.go(2.51 KB)
📄 os_plan9.go(10.18 KB)
📄 os_plan9_arm.go(375 B)
📄 os_solaris.go(6.62 KB)
📄 os_unix.go(436 B)
📄 os_unix_nonlinux.go(374 B)
📄 os_wasip1.go(7 KB)
📄 os_wasm.go(3.15 KB)
📄 os_windows.go(41.39 KB)
📄 os_windows_arm.go(511 B)
📄 os_windows_arm64.go(339 B)
📄 pagetrace_off.go(550 B)
📄 pagetrace_on.go(10.36 KB)
📄 panic.go(41.85 KB)
📄 panic32.go(4.8 KB)
📄 panic_test.go(1.71 KB)
📄 panicnil_test.go(1.25 KB)
📄 pinner.go(10.98 KB)
📄 pinner_test.go(11.04 KB)
📄 plugin.go(4.37 KB)
📁 pprof
📄 preempt.go(15.03 KB)
📄 preempt_386.s(824 B)
📄 preempt_amd64.s(1.67 KB)
📄 preempt_arm.s(1.49 KB)
📄 preempt_arm64.s(1.97 KB)
📄 preempt_loong64.s(2.41 KB)
📄 preempt_mips64x.s(2.72 KB)
📄 preempt_mipsx.s(2.68 KB)
📄 preempt_nonwindows.go(290 B)
📄 preempt_ppc64x.s(2.72 KB)
📄 preempt_riscv64.s(2.26 KB)
📄 preempt_s390x.s(1.01 KB)
📄 preempt_wasm.s(176 B)
📄 print.go(5.92 KB)
📄 proc.go(204.28 KB)
📄 proc_runtime_test.go(1.38 KB)
📄 proc_test.go(25.85 KB)
📄 profbuf.go(18.26 KB)
📄 profbuf_test.go(8.54 KB)
📄 proflabel.go(1.52 KB)
📁 race
📄 race.go(18.81 KB)
📄 race0.go(2.79 KB)
📄 race_amd64.s(13.94 KB)
📄 race_arm64.s(14.21 KB)
📄 race_ppc64le.s(15.93 KB)
📄 race_s390x.s(11.99 KB)
📄 rand.go(7.11 KB)
📄 rand_test.go(1.95 KB)
📄 rdebug.go(550 B)
📄 retry.go(760 B)
📄 rt0_aix_ppc64.s(4.09 KB)
📄 rt0_android_386.s(822 B)
📄 rt0_android_amd64.s(754 B)
📄 rt0_android_arm.s(843 B)
📄 rt0_android_arm64.s(941 B)
📄 rt0_darwin_amd64.s(399 B)
📄 rt0_darwin_arm64.s(1.69 KB)
📄 rt0_dragonfly_amd64.s(448 B)
📄 rt0_freebsd_386.s(454 B)
📄 rt0_freebsd_amd64.s(442 B)
📄 rt0_freebsd_arm.s(298 B)
📄 rt0_freebsd_arm64.s(1.88 KB)
📄 rt0_freebsd_riscv64.s(2.72 KB)
📄 rt0_illumos_amd64.s(311 B)
📄 rt0_ios_amd64.s(425 B)
📄 rt0_ios_arm64.s(425 B)
📄 rt0_js_wasm.s(1.53 KB)
📄 rt0_linux_386.s(450 B)
📄 rt0_linux_amd64.s(307 B)
📄 rt0_linux_arm.s(1007 B)
📄 rt0_linux_arm64.s(1.81 KB)
📄 rt0_linux_loong64.s(2.01 KB)
📄 rt0_linux_mips64x.s(1014 B)
📄 rt0_linux_mipsx.s(797 B)
📄 rt0_linux_ppc64.s(847 B)
📄 rt0_linux_ppc64le.s(2.89 KB)
📄 rt0_linux_riscv64.s(2.65 KB)
📄 rt0_linux_s390x.s(676 B)
📄 rt0_netbsd_386.s(452 B)
📄 rt0_netbsd_amd64.s(309 B)
📄 rt0_netbsd_arm.s(296 B)
📄 rt0_netbsd_arm64.s(1.8 KB)
📄 rt0_openbsd_386.s(454 B)
📄 rt0_openbsd_amd64.s(311 B)
📄 rt0_openbsd_arm.s(298 B)
📄 rt0_openbsd_arm64.s(1.96 KB)
📄 rt0_openbsd_mips64.s(976 B)
📄 rt0_openbsd_ppc64.s(370 B)
📄 rt0_openbsd_riscv64.s(372 B)
📄 rt0_plan9_386.s(523 B)
📄 rt0_plan9_amd64.s(481 B)
📄 rt0_plan9_arm.s(397 B)
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📄 rt0_wasip1_wasm.s(387 B)
📄 rt0_windows_386.s(1.28 KB)
📄 rt0_windows_amd64.s(1.14 KB)
📄 rt0_windows_arm.s(386 B)
📄 rt0_windows_arm64.s(733 B)
📄 runtime-gdb.py(15.44 KB)
📄 runtime-gdb_test.go(24.04 KB)
📄 runtime-gdb_unix_test.go(9.4 KB)
📄 runtime-lldb_test.go(4.95 KB)
📄 runtime-seh_windows_test.go(4.7 KB)
📄 runtime.go(7.1 KB)
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📄 runtime2.go(46.16 KB)
📄 runtime_boring.go(606 B)
📄 runtime_linux_test.go(1.77 KB)
📄 runtime_mmap_test.go(1.77 KB)
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📄 rwmutex.go(5 KB)
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📄 security_aix.go(449 B)
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📄 sigaction.go(489 B)
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📄 signal_amd64.go(2.73 KB)
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📄 signal_darwin.go(2.13 KB)
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📄 signal_freebsd.go(2.2 KB)
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📄 signal_linux_386.go(1.59 KB)
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📄 signal_linux_loong64.go(3.22 KB)
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📄 signal_linux_ppc64x.go(3.5 KB)
📄 signal_linux_riscv64.go(2.92 KB)
📄 signal_linux_s390x.go(4.49 KB)
📄 signal_loong64.go(3.01 KB)
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📄 signal_netbsd.go(2.18 KB)
📄 signal_netbsd_386.go(1.76 KB)
📄 signal_netbsd_amd64.go(2.33 KB)
📄 signal_netbsd_arm.go(2.3 KB)
📄 signal_netbsd_arm64.go(3.4 KB)
📄 signal_openbsd.go(2.18 KB)
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📄 signal_openbsd_mips64.go(3.28 KB)
📄 signal_openbsd_ppc64.go(3.53 KB)
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📄 signal_plan9.go(1.93 KB)
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📄 signal_riscv64.go(2.91 KB)
📄 signal_solaris.go(4.5 KB)
📄 signal_solaris_amd64.go(2.47 KB)
📄 signal_unix.go(44.11 KB)
📄 signal_windows.go(14.48 KB)
📄 signal_windows_test.go(8.98 KB)
📄 sigqueue.go(7.62 KB)
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📄 sigtab_aix.go(11.3 KB)
📄 sigtab_linux_generic.go(3.52 KB)
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📄 sizeclasses.go(9.17 KB)
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📄 softfloat64.go(11.54 KB)
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📄 stack.go(40.02 KB)
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📄 stkframe.go(9.88 KB)
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📄 sys_aix_ppc64.s(7.42 KB)
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📄 sys_freebsd_386.s(9.41 KB)
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📄 sys_freebsd_riscv64.s(8.92 KB)
📄 sys_libc.go(1.84 KB)
📄 sys_linux_386.s(17.89 KB)
📄 sys_linux_amd64.s(15.74 KB)
📄 sys_linux_arm.s(13.5 KB)
📄 sys_linux_arm64.s(16.71 KB)
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📄 sys_linux_ppc64x.s(18.09 KB)
📄 sys_linux_riscv64.s(11.48 KB)
📄 sys_linux_s390x.s(12.49 KB)
📄 sys_loong64.go(489 B)
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📄 sys_mipsx.go(496 B)
📄 sys_netbsd_386.s(9.61 KB)
📄 sys_netbsd_amd64.s(9.78 KB)
📄 sys_netbsd_arm.s(10.58 KB)
📄 sys_netbsd_arm64.s(9.47 KB)
📄 sys_nonppc64x.go(245 B)
📄 sys_openbsd.go(2.59 KB)
📄 sys_openbsd1.go(1.23 KB)
📄 sys_openbsd2.go(8.67 KB)
📄 sys_openbsd3.go(3.37 KB)
📄 sys_openbsd_386.s(20.4 KB)
📄 sys_openbsd_amd64.s(15.54 KB)
📄 sys_openbsd_arm.s(18.46 KB)
📄 sys_openbsd_arm64.s(15.05 KB)
📄 sys_openbsd_mips64.s(8.81 KB)
📄 sys_openbsd_ppc64.s(15.3 KB)
📄 sys_openbsd_riscv64.s(16.8 KB)
📄 sys_plan9_386.s(4.48 KB)
📄 sys_plan9_amd64.s(4.56 KB)
📄 sys_plan9_arm.s(7.03 KB)
📄 sys_ppc64x.go(532 B)
📄 sys_riscv64.go(469 B)
📄 sys_s390x.go(469 B)
📄 sys_solaris_amd64.s(6.42 KB)
📄 sys_wasm.go(758 B)
📄 sys_wasm.s(1.43 KB)
📄 sys_windows_386.s(6.46 KB)
📄 sys_windows_amd64.s(8.41 KB)
📄 sys_windows_arm.s(7.72 KB)
📄 sys_windows_arm64.s(6.8 KB)
📄 sys_x86.go(552 B)
📄 syscall2_solaris.go(1.85 KB)
📄 syscall_aix.go(6.33 KB)
📄 syscall_solaris.go(8.38 KB)
📄 syscall_unix_test.go(635 B)
📄 syscall_windows.go(16.57 KB)
📄 syscall_windows_test.go(32.45 KB)
📄 tagptr.go(496 B)
📄 tagptr_32bit.go(927 B)
📄 tagptr_64bit.go(3.23 KB)
📄 test_amd64.go(196 B)
📄 test_amd64.s(316 B)
📄 test_stubs.go(218 B)
📁 testdata
📄 textflag.h(1.47 KB)
📄 time.go(30.57 KB)
📄 time_fake.go(2.5 KB)
📄 time_linux_amd64.s(2.02 KB)
📄 time_nofake.go(709 B)
📄 time_test.go(2.04 KB)
📄 time_windows.h(753 B)
📄 time_windows_386.s(1.71 KB)
📄 time_windows_amd64.s(786 B)
📄 time_windows_arm.s(1.97 KB)
📄 time_windows_arm64.s(906 B)
📄 timeasm.go(418 B)
📄 timestub.go(532 B)
📄 timestub2.go(363 B)
📄 tls_arm.s(3.45 KB)
📄 tls_arm64.h(1.1 KB)
📄 tls_arm64.s(1.2 KB)
📄 tls_loong64.s(589 B)
📄 tls_mips64x.s(733 B)
📄 tls_mipsx.s(710 B)
📄 tls_ppc64x.s(1.52 KB)
📄 tls_riscv64.s(615 B)
📄 tls_s390x.s(1.55 KB)
📄 tls_stub.go(260 B)
📄 tls_windows_amd64.go(294 B)
📁 trace
📄 trace.go(62.76 KB)
📄 trace2.go(33.81 KB)
📄 trace2buf.go(6.58 KB)
📄 trace2cpu.go(8.87 KB)
📄 trace2event.go(8.39 KB)
📄 trace2map.go(4.36 KB)
📄 trace2region.go(1.68 KB)
📄 trace2runtime.go(24.2 KB)
📄 trace2stack.go(9.45 KB)
📄 trace2status.go(7.24 KB)
📄 trace2string.go(2.59 KB)
📄 trace2time.go(3.21 KB)
📄 trace_cgo_test.go(4.47 KB)
📄 traceback.go(54.61 KB)
📄 traceback_test.go(22.95 KB)
📄 tracebackx_test.go(509 B)
📄 type.go(12.1 KB)
📄 typekind.go(743 B)
📄 unsafe.go(2.97 KB)
📄 unsafepoint_test.go(3.27 KB)
📄 utf8.go(3.39 KB)
📄 vdso_elf32.go(2.76 KB)
📄 vdso_elf64.go(2.84 KB)
📄 vdso_freebsd.go(2.44 KB)
📄 vdso_freebsd_arm.go(454 B)
📄 vdso_freebsd_arm64.go(454 B)
📄 vdso_freebsd_riscv64.go(429 B)
📄 vdso_freebsd_x86.go(1.86 KB)
📄 vdso_in_none.go(443 B)
📄 vdso_linux.go(7.77 KB)
📄 vdso_linux_386.go(669 B)
📄 vdso_linux_amd64.go(685 B)
📄 vdso_linux_arm.go(669 B)
📄 vdso_linux_arm64.go(670 B)
📄 vdso_linux_loong64.go(793 B)
📄 vdso_linux_mips64x.go(850 B)
📄 vdso_linux_ppc64x.go(672 B)
📄 vdso_linux_riscv64.go(666 B)
📄 vdso_linux_s390x.go(659 B)
📄 vdso_test.go(3.71 KB)
📄 vlop_386.s(2.02 KB)
📄 vlop_arm.s(7.06 KB)
📄 vlop_arm_test.go(3.75 KB)
📄 vlrt.go(6.71 KB)
📄 wincallback.go(3.45 KB)
📄 write_err.go(291 B)
📄 write_err_android.go(4.65 KB)
📄 zcallback_windows.go(155 B)
📄 zcallback_windows.s(63.06 KB)
📄 zcallback_windows_arm.s(89.32 KB)
📄 zcallback_windows_arm64.s(89.32 KB)

Editing: trace2stack.go

// Copyright 2023 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.

//go:build goexperiment.exectracer2

// Trace stack table and acquisition.

package runtime

import (
	"internal/abi"
	"internal/goarch"
	"unsafe"
)

const (
	// Maximum number of PCs in a single stack trace.
	// Since events contain only stack id rather than whole stack trace,
	// we can allow quite large values here.
	traceStackSize = 128

// logicalStackSentinel is a sentinel value at pcBuf[0] signifying that
	// pcBuf[1:] holds a logical stack requiring no further processing. Any other
	// value at pcBuf[0] represents a skip value to apply to the physical stack in
	// pcBuf[1:] after inline expansion.
	logicalStackSentinel = ^uintptr(0)
)

// traceStack captures a stack trace and registers it in the trace stack table.
// It then returns its unique ID.
//
// skip controls the number of leaf frames to omit in order to hide tracer internals
// from stack traces, see CL 5523.
//
// Avoid calling this function directly. gen needs to be the current generation
// that this stack trace is being written out for, which needs to be synchronized with
// generations moving forward. Prefer traceEventWriter.stack.
func traceStack(skip int, mp *m, gen uintptr) uint64 {
	var pcBuf [traceStackSize]uintptr

gp := getg()
	curgp := gp.m.curg
	nstk := 1
	if tracefpunwindoff() || mp.hasCgoOnStack() {
		// Slow path: Unwind using default unwinder. Used when frame pointer
		// unwinding is unavailable or disabled (tracefpunwindoff), or might
		// produce incomplete results or crashes (hasCgoOnStack). Note that no
		// cgo callback related crashes have been observed yet. The main
		// motivation is to take advantage of a potentially registered cgo
		// symbolizer.
		pcBuf[0] = logicalStackSentinel
		if curgp == gp {
			nstk += callers(skip+1, pcBuf[1:])
		} else if curgp != nil {
			nstk += gcallers(curgp, skip, pcBuf[1:])
		}
	} else {
		// Fast path: Unwind using frame pointers.
		pcBuf[0] = uintptr(skip)
		if curgp == gp {
			nstk += fpTracebackPCs(unsafe.Pointer(getfp()), pcBuf[1:])
		} else if curgp != nil {
			// We're called on the g0 stack through mcall(fn) or systemstack(fn). To
			// behave like gcallers above, we start unwinding from sched.bp, which
			// points to the caller frame of the leaf frame on g's stack. The return
			// address of the leaf frame is stored in sched.pc, which we manually
			// capture here.
			pcBuf[1] = curgp.sched.pc
			nstk += 1 + fpTracebackPCs(unsafe.Pointer(curgp.sched.bp), pcBuf[2:])
		}
	}
	if nstk > 0 {
		nstk-- // skip runtime.goexit
	}
	if nstk > 0 && curgp.goid == 1 {
		nstk-- // skip runtime.main
	}
	id := trace.stackTab[gen%2].put(pcBuf[:nstk])
	return id
}

// traceStackTable maps stack traces (arrays of PC's) to unique uint32 ids.
// It is lock-free for reading.
type traceStackTable struct {
	tab traceMap
}

// put returns a unique id for the stack trace pcs and caches it in the table,
// if it sees the trace for the first time.
func (t *traceStackTable) put(pcs []uintptr) uint64 {
	if len(pcs) == 0 {
		return 0
	}
	id, _ := t.tab.put(noescape(unsafe.Pointer(&pcs[0])), uintptr(len(pcs))*unsafe.Sizeof(uintptr(0)))
	return id
}

// dump writes all previously cached stacks to trace buffers,
// releases all memory and resets state. It must only be called once the caller
// can guarantee that there are no more writers to the table.
//
// This must run on the system stack because it flushes buffers and thus
// may acquire trace.lock.
//
//go:systemstack
func (t *traceStackTable) dump(gen uintptr) {
	w := unsafeTraceWriter(gen, nil)

// Iterate over the table.
	//
	// Do not acquire t.tab.lock. There's a conceptual lock cycle between acquiring this lock
	// here and allocation-related locks. Specifically, this lock may be acquired when an event
	// is emitted in allocation paths. Simultaneously, we might allocate here with the lock held,
	// creating a cycle. In practice, this cycle is never exercised. Because the table is only
	// dumped once there are no more writers, it's not possible for the cycle to occur. However
	// the lockrank mode is not sophisticated enough to identify this, and if it's not possible
	// for that cycle to happen, then it's also not possible for this to race with writers to
	// the table.
	for i := range t.tab.tab {
		stk := t.tab.bucket(i)
		for ; stk != nil; stk = stk.next() {
			stack := unsafe.Slice((*uintptr)(unsafe.Pointer(&stk.data[0])), uintptr(len(stk.data))/unsafe.Sizeof(uintptr(0)))

// N.B. This might allocate, but that's OK because we're not writing to the M's buffer,
			// but one we're about to create (with ensure).
			frames := makeTraceFrames(gen, fpunwindExpand(stack))

// Returns the maximum number of bytes required to hold the encoded stack, given that
			// it contains N frames.
			maxBytes := 1 + (2+4*len(frames))*traceBytesPerNumber

// Estimate the size of this record. This
			// bound is pretty loose, but avoids counting
			// lots of varint sizes.
			//
			// Add 1 because we might also write traceEvStacks.
			var flushed bool
			w, flushed = w.ensure(1 + maxBytes)
			if flushed {
				w.byte(byte(traceEvStacks))
			}

// Emit stack event.
			w.byte(byte(traceEvStack))
			w.varint(uint64(stk.id))
			w.varint(uint64(len(frames)))
			for _, frame := range frames {
				w.varint(uint64(frame.PC))
				w.varint(frame.funcID)
				w.varint(frame.fileID)
				w.varint(frame.line)
			}
		}
	}
	// Still, hold the lock over reset. The callee expects it, even though it's
	// not strictly necessary.
	lock(&t.tab.lock)
	t.tab.reset()
	unlock(&t.tab.lock)

w.flush().end()
}

// makeTraceFrames returns the frames corresponding to pcs. It may
// allocate and may emit trace events.
func makeTraceFrames(gen uintptr, pcs []uintptr) []traceFrame {
	frames := make([]traceFrame, 0, len(pcs))
	ci := CallersFrames(pcs)
	for {
		f, more := ci.Next()
		frames = append(frames, makeTraceFrame(gen, f))
		if !more {
			return frames
		}
	}
}

type traceFrame struct {
	PC     uintptr
	funcID uint64
	fileID uint64
	line   uint64
}

// makeTraceFrame sets up a traceFrame for a frame.
func makeTraceFrame(gen uintptr, f Frame) traceFrame {
	var frame traceFrame
	frame.PC = f.PC

fn := f.Function
	const maxLen = 1 << 10
	if len(fn) > maxLen {
		fn = fn[len(fn)-maxLen:]
	}
	frame.funcID = trace.stringTab[gen%2].put(gen, fn)
	frame.line = uint64(f.Line)
	file := f.File
	if len(file) > maxLen {
		file = file[len(file)-maxLen:]
	}
	frame.fileID = trace.stringTab[gen%2].put(gen, file)
	return frame
}

// tracefpunwindoff returns true if frame pointer unwinding for the tracer is
// disabled via GODEBUG or not supported by the architecture.
func tracefpunwindoff() bool {
	return debug.tracefpunwindoff != 0 || (goarch.ArchFamily != goarch.AMD64 && goarch.ArchFamily != goarch.ARM64)
}

// fpTracebackPCs populates pcBuf with the return addresses for each frame and
// returns the number of PCs written to pcBuf. The returned PCs correspond to
// "physical frames" rather than "logical frames"; that is if A is inlined into
// B, this will return a PC for only B.
func fpTracebackPCs(fp unsafe.Pointer, pcBuf []uintptr) (i int) {
	for i = 0; i < len(pcBuf) && fp != nil; i++ {
		// return addr sits one word above the frame pointer
		pcBuf[i] = *(*uintptr)(unsafe.Pointer(uintptr(fp) + goarch.PtrSize))
		// follow the frame pointer to the next one
		fp = unsafe.Pointer(*(*uintptr)(fp))
	}
	return i
}

// fpunwindExpand checks if pcBuf contains logical frames (which include inlined
// frames) or physical frames (produced by frame pointer unwinding) using a
// sentinel value in pcBuf[0]. Logical frames are simply returned without the
// sentinel. Physical frames are turned into logical frames via inline unwinding
// and by applying the skip value that's stored in pcBuf[0].
func fpunwindExpand(pcBuf []uintptr) []uintptr {
	if len(pcBuf) > 0 && pcBuf[0] == logicalStackSentinel {
		// pcBuf contains logical rather than inlined frames, skip has already been
		// applied, just return it without the sentinel value in pcBuf[0].
		return pcBuf[1:]
	}

var (
		lastFuncID = abi.FuncIDNormal
		newPCBuf   = make([]uintptr, 0, traceStackSize)
		skip       = pcBuf[0]
		// skipOrAdd skips or appends retPC to newPCBuf and returns true if more
		// pcs can be added.
		skipOrAdd = func(retPC uintptr) bool {
			if skip > 0 {
				skip--
			} else {
				newPCBuf = append(newPCBuf, retPC)
			}
			return len(newPCBuf) < cap(newPCBuf)
		}
	)

outer:
	for _, retPC := range pcBuf[1:] {
		callPC := retPC - 1
		fi := findfunc(callPC)
		if !fi.valid() {
			// There is no funcInfo if callPC belongs to a C function. In this case
			// we still keep the pc, but don't attempt to expand inlined frames.
			if more := skipOrAdd(retPC); !more {
				break outer
			}
			continue
		}

u, uf := newInlineUnwinder(fi, callPC)
		for ; uf.valid(); uf = u.next(uf) {
			sf := u.srcFunc(uf)
			if sf.funcID == abi.FuncIDWrapper && elideWrapperCalling(lastFuncID) {
				// ignore wrappers
			} else if more := skipOrAdd(uf.pc + 1); !more {
				break outer
			}
			lastFuncID = sf.funcID
		}
	}
	return newPCBuf
}

// startPCForTrace returns the start PC of a goroutine for tracing purposes.
// If pc is a wrapper, it returns the PC of the wrapped function. Otherwise it
// returns pc.
func startPCForTrace(pc uintptr) uintptr {
	f := findfunc(pc)
	if !f.valid() {
		return pc // may happen for locked g in extra M since its pc is 0.
	}
	w := funcdata(f, abi.FUNCDATA_WrapInfo)
	if w == nil {
		return pc // not a wrapper
	}
	return f.datap.textAddr(*(*uint32)(w))
}

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