// Copyright 2009 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. #include "config.h" #include "go-assert.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef HAVE_SYS_MMAN_H #include #endif #define _STRINGIFY2_(x) #x #define _STRINGIFY_(x) _STRINGIFY2_(x) #define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__) /* This file supports C files copied from the 6g runtime library. This is a version of the 6g runtime.h rewritten for gccgo's version of the code. */ typedef signed int int8 __attribute__ ((mode (QI))); typedef unsigned int uint8 __attribute__ ((mode (QI))); typedef signed int int16 __attribute__ ((mode (HI))); typedef unsigned int uint16 __attribute__ ((mode (HI))); typedef signed int int32 __attribute__ ((mode (SI))); typedef unsigned int uint32 __attribute__ ((mode (SI))); typedef signed int int64 __attribute__ ((mode (DI))); typedef unsigned int uint64 __attribute__ ((mode (DI))); typedef float float32 __attribute__ ((mode (SF))); typedef double float64 __attribute__ ((mode (DF))); typedef signed int intptr __attribute__ ((mode (pointer))); typedef unsigned int uintptr __attribute__ ((mode (pointer))); typedef intptr intgo; // Go's int typedef uintptr uintgo; // Go's uint typedef uintptr uintreg; /* Defined types. */ typedef _Bool bool; typedef uint8 byte; typedef struct g G; typedef struct mutex Lock; typedef struct m M; typedef struct p P; typedef struct note Note; typedef struct String String; typedef struct FuncVal FuncVal; typedef struct SigTab SigTab; typedef struct hchan Hchan; typedef struct timer Timer; typedef struct lfnode LFNode; typedef struct cgoMal CgoMal; typedef struct PollDesc PollDesc; typedef struct sudog SudoG; typedef struct schedt Sched; typedef struct __go_open_array Slice; typedef struct iface Iface; typedef struct eface Eface; typedef struct _defer Defer; typedef struct _panic Panic; typedef struct tracebackg Traceback; typedef struct location Location; struct String { const byte* str; intgo len; }; struct FuncVal { uintptr_t fn; // variable-size, fn-specific data here }; // Type structs will be defined by runtime.inc. struct _type; struct functype; #include "array.h" // Rename Go types generated by mkrsysinfo.sh from C types, to avoid // the name conflict. #define timeval go_timeval #define timespec go_timespec #include "runtime.inc" #undef timeval #undef timespec /* * Per-CPU declaration. */ extern M* runtime_m(void); extern G* runtime_g(void) __asm__(GOSYM_PREFIX "runtime.getg"); enum { true = 1, false = 0, }; enum { PtrSize = sizeof(void*), }; enum { // Per-M stack segment cache size. StackCacheSize = 32, // Global <-> per-M stack segment cache transfer batch size. StackCacheBatch = 16, }; struct SigTab { int32 sig; int32 flags; void* fwdsig; }; #ifdef GOOS_nacl enum { NaCl = 1, }; #else enum { NaCl = 0, }; #endif #ifdef GOOS_windows enum { Windows = 1 }; #else enum { Windows = 0 }; #endif #ifdef GOOS_solaris enum { Solaris = 1 }; #else enum { Solaris = 0 }; #endif extern bool runtime_copystack; /* * defined macros * you need super-gopher-guru privilege * to add this list. */ #define nelem(x) (sizeof(x)/sizeof((x)[0])) #define nil ((void*)0) #define USED(v) ((void) v) #define ROUND(x, n) (((x)+(n)-1)&~(uintptr)((n)-1)) /* all-caps to mark as macro: it evaluates n twice */ enum { // hashinit wants this many random bytes HashRandomBytes = 32 }; void runtime_hashinit(void); /* * external data */ extern uintptr* runtime_getZerobase(void) __asm__(GOSYM_PREFIX "runtime.getZerobase"); extern bool runtime_isstarted; extern bool runtime_isarchive; extern void panicmem(void) __asm__ (GOSYM_PREFIX "runtime.panicmem"); /* * common functions and data */ #define runtime_strcmp(s1, s2) __builtin_strcmp((s1), (s2)) #define runtime_strncmp(s1, s2, n) __builtin_strncmp((s1), (s2), (n)) #define runtime_strstr(s1, s2) __builtin_strstr((s1), (s2)) intgo runtime_findnull(const byte*) __asm__ (GOSYM_PREFIX "runtime.findnull"); void runtime_gogo(G*) __asm__ (GOSYM_PREFIX "runtime.gogo"); void runtime_args(int32, byte**) __asm__ (GOSYM_PREFIX "runtime.args"); void runtime_osinit(void) __asm__ (GOSYM_PREFIX "runtime.osinit"); void runtime_alginit(void) __asm__ (GOSYM_PREFIX "runtime.alginit"); void runtime_goargs(void) __asm__ (GOSYM_PREFIX "runtime.goargs"); void runtime_throw(const char*) __attribute__ ((noreturn)); void runtime_panicstring(const char*) __attribute__ ((noreturn)); bool runtime_canpanic(G*); void runtime_printf(const char*, ...); int32 runtime_snprintf(byte*, int32, const char*, ...); #define runtime_mcmp(a, b, s) __builtin_memcmp((a), (b), (s)) void runtime_memmove(void*, void*, uint64) __asm__ (GOSYM_PREFIX "runtime.memmove"); String runtime_gostringnocopy(const byte*) __asm__ (GOSYM_PREFIX "runtime.gostringnocopy"); void runtime_ginit(void) __asm__ (GOSYM_PREFIX "runtime.ginit"); void runtime_schedinit(void) __asm__ (GOSYM_PREFIX "runtime.schedinit"); void runtime_initsig(bool) __asm__ (GOSYM_PREFIX "runtime.initsig"); #define runtime_open(p, f, m) open((p), (f), (m)) #define runtime_read(d, v, n) read((d), (v), (n)) #define runtime_write(d, v, n) write((d), (v), (n)) #define runtime_close(d) close(d) void runtime_ready(G*, intgo, bool) __asm__ (GOSYM_PREFIX "runtime.ready"); String runtime_getenv(const char*); int32 runtime_atoi(const byte*, intgo); void* runtime_mstart(void*); G* runtime_malg(bool, bool, byte**, uintptr*) __asm__(GOSYM_PREFIX "runtime.malg"); void runtime_minit(void) __asm__ (GOSYM_PREFIX "runtime.minit"); void runtime_signalstack(byte*, uintptr) __asm__ (GOSYM_PREFIX "runtime.signalstack"); void runtime_mallocinit(void) __asm__ (GOSYM_PREFIX "runtime.mallocinit"); void* runtime_mallocgc(uintptr, const struct _type*, bool) __asm__ (GOSYM_PREFIX "runtime.mallocgc"); void* runtime_sysAlloc(uintptr, uint64*) __asm__ (GOSYM_PREFIX "runtime.sysAlloc"); void runtime_sysFree(void*, uintptr, uint64*) __asm__ (GOSYM_PREFIX "runtime.sysFree"); void runtime_mprofinit(void); #define runtime_getcallersp() __builtin_dwarf_cfa() void runtime_mcall(FuncVal*) __asm__ (GOSYM_PREFIX "runtime.mcall"); int32 runtime_timediv(int64, int32, int32*) __asm__ (GOSYM_PREFIX "runtime.timediv"); int32 runtime_round2(int32 x); // round x up to a power of 2. // atomic operations #define runtime_xadd(p, v) __atomic_add_fetch (p, v, __ATOMIC_SEQ_CST) #define runtime_atomicload(p) __atomic_load_n (p, __ATOMIC_SEQ_CST) void runtime_setg(G*) __asm__ (GOSYM_PREFIX "runtime.setg"); void runtime_newextram(void) __asm__ (GOSYM_PREFIX "runtime.newextram"); #define runtime_exit(s) exit(s) void runtime_gosched(void) __asm__ (GOSYM_PREFIX "runtime.Gosched"); void runtime_schedtrace(bool) __asm__ (GOSYM_PREFIX "runtime.schedtrace"); void runtime_goparkunlock(Lock*, String, byte, intgo) __asm__ (GOSYM_PREFIX "runtime.goparkunlock"); void runtime_tsleep(int64, const char*); void runtime_entersyscall() __asm__ (GOSYM_PREFIX "runtime.entersyscall"); void runtime_entersyscallblock() __asm__ (GOSYM_PREFIX "runtime.entersyscallblock"); G* __go_go(uintptr, void*); int32 runtime_callers(int32, Location*, int32, bool keep_callers); struct callers_data; bool runtime_skipInCallback(const char *, struct callers_data *) __asm__ (GOSYM_PREFIX "runtime.skipInCallback"); int64 runtime_nanotime1(void) // monotonic time __asm__(GOSYM_PREFIX "runtime.nanotime1"); void runtime_dopanic(int32) __attribute__ ((noreturn)); void runtime_startpanic(void) __asm__ (GOSYM_PREFIX "runtime.startpanic"); void runtime_unwindstack(G*, byte*); void runtime_usleep(uint32) __asm__ (GOSYM_PREFIX "runtime.usleep"); int64 runtime_cputicks(void) __asm__ (GOSYM_PREFIX "runtime.cputicks"); int64 runtime_tickspersecond(void) __asm__ (GOSYM_PREFIX "runtime.tickspersecond"); void runtime_blockevent(int64, int32); extern int64 runtime_blockprofilerate; G* runtime_netpoll(bool) __asm__ (GOSYM_PREFIX "runtime.netpoll"); void runtime_parsedebugvars(void) __asm__(GOSYM_PREFIX "runtime.parsedebugvars"); void _rt0_go(void); G* runtime_timejump(void); /* * mutual exclusion locks. in the uncontended case, * as fast as spin locks (just a few user-level instructions), * but on the contention path they sleep in the kernel. * a zeroed Lock is unlocked (no need to initialize each lock). */ void runtime_lock(Lock*) __asm__(GOSYM_PREFIX "runtime.lock"); void runtime_unlock(Lock*) __asm__(GOSYM_PREFIX "runtime.unlock"); /* * sleep and wakeup on one-time events. * before any calls to notesleep or notewakeup, * must call noteclear to initialize the Note. * then, exactly one thread can call notesleep * and exactly one thread can call notewakeup (once). * once notewakeup has been called, the notesleep * will return. future notesleep will return immediately. * subsequent noteclear must be called only after * previous notesleep has returned, e.g. it's disallowed * to call noteclear straight after notewakeup. * * notetsleep is like notesleep but wakes up after * a given number of nanoseconds even if the event * has not yet happened. if a goroutine uses notetsleep to * wake up early, it must wait to call noteclear until it * can be sure that no other goroutine is calling * notewakeup. * * notesleep/notetsleep are generally called on g0, * notetsleepg is similar to notetsleep but is called on user g. */ void runtime_noteclear(Note*) __asm__ (GOSYM_PREFIX "runtime.noteclear"); void runtime_notesleep(Note*) __asm__ (GOSYM_PREFIX "runtime.notesleep"); void runtime_notewakeup(Note*) __asm__ (GOSYM_PREFIX "runtime.notewakeup"); bool runtime_notetsleep(Note*, int64) // false - timeout __asm__ (GOSYM_PREFIX "runtime.notetsleep"); bool runtime_notetsleepg(Note*, int64) // false - timeout __asm__ (GOSYM_PREFIX "runtime.notetsleepg"); /* * low level C-called */ #define runtime_memclr(buf, size) __builtin_memset((buf), 0, (size)) #define runtime_getcallerpc() __builtin_return_address(0) #ifdef __rtems__ void __wrap_rtems_task_variable_add(void **); #endif /* * runtime go-called */ void reflect_call(const struct functype *, FuncVal *, _Bool, _Bool, void **, void **) __asm__ (GOSYM_PREFIX "runtime.reflectcall"); void runtime_panic(Eface) __asm__ (GOSYM_PREFIX "runtime.gopanic"); void runtime_panic(Eface) __attribute__ ((noreturn)); /* * runtime c-called (but written in Go) */ void runtime_newErrorCString(uintptr, Eface*) __asm__ (GOSYM_PREFIX "runtime.NewErrorCString"); /* * wrapped for go users */ void runtime_procyield(uint32) __asm__(GOSYM_PREFIX "runtime.procyield"); void runtime_osyield(void) __asm__(GOSYM_PREFIX "runtime.osyield"); uintptr runtime_memlimit(void); #define ISNAN(f) __builtin_isnan(f) enum { UseSpanType = 1, }; #define runtime_setitimer setitimer void runtime_check(void) __asm__ (GOSYM_PREFIX "runtime.check"); // Size of stack space allocated using Go's allocator. // This will be 0 when using split stacks, as in that case // the stacks are allocated by the splitstack library. extern uintptr runtime_stacks_sys; /* * ia64's register file is spilled to a separate stack, the register backing * store, on window overflow, and must also be scanned. This occupies the other * end of the normal stack allocation, growing upwards. * We also need to ensure all register windows are flushed to the backing * store, as unlike SPARC, __builtin_unwind_init doesn't do this on ia64. */ #ifdef __ia64__ # define secondary_stack_pointer() __builtin_ia64_bsp() # define initial_secondary_stack_pointer(stack_alloc) (stack_alloc) # define flush_registers_to_secondary_stack() __builtin_ia64_flushrs() #else # define secondary_stack_pointer() nil # define initial_secondary_stack_pointer(stack_alloc) nil # define flush_registers_to_secondary_stack() #endif struct backtrace_state; extern struct backtrace_state *__go_get_backtrace_state(void); extern void __go_syminfo_fnname_callback(void*, uintptr_t, const char*, uintptr_t, uintptr_t); extern void runtime_main(void*) __asm__(GOSYM_PREFIX "runtime.main"); #define PREFETCH(p) __builtin_prefetch(p) void runtime_badsignal(int); Defer* runtime_newdefer(void); void runtime_freedefer(Defer*); extern void _cgo_wait_runtime_init_done (void); extern void _cgo_notify_runtime_init_done (void) __asm__ (GOSYM_PREFIX "runtime.__cgo__notify__runtime__init__done"); extern _Bool runtime_iscgo; extern uintptr __go_end __attribute__ ((weak)); extern void *getitab(const struct _type *, const struct _type *, _Bool) __asm__ (GOSYM_PREFIX "runtime.getitab"); extern void runtime_cpuinit(void); extern void setRandomNumber(uint32) __asm__ (GOSYM_PREFIX "runtime.setRandomNumber"); extern void setIsCgo(void) __asm__ (GOSYM_PREFIX "runtime.setIsCgo"); extern void setSupportAES(bool) __asm__ (GOSYM_PREFIX "runtime.setSupportAES"); extern void typedmemmove(const struct _type *, void *, const void *) __asm__ (GOSYM_PREFIX "runtime.typedmemmove"); extern Sched* runtime_getsched(void) __asm__ (GOSYM_PREFIX "runtime.getsched"); struct funcfileline_return { String retfn; String retfile; intgo retline; intgo retframes; }; struct funcfileline_return runtime_funcfileline (uintptr targetpc, int32 index, bool more) __asm__ (GOSYM_PREFIX "runtime.funcfileline"); /* * helpers for stack scan. */ bool scanstackwithmap(void*) __asm__(GOSYM_PREFIX "runtime.scanstackwithmap"); bool doscanstack(G*, void*) __asm__("runtime.doscanstack"); extern bool runtime_usestackmaps; bool probestackmaps(void) __asm__("runtime.probestackmaps"); // This is set to non-zero when calling backtrace_full. This is used // to avoid getting hanging on a recursive lock in dl_iterate_phdr on // older versions of glibc when a SIGPROF signal arrives while // collecting a backtrace. extern uint32 __go_runtime_in_callers; // Cheaper context switch functions. Currently only defined on // Linux/AMD64. #if defined(__x86_64__) && defined(__linux__) && !defined(__CET__) typedef struct { uint64 regs[8]; } __go_context_t; int __go_getcontext(__go_context_t*); int __go_setcontext(__go_context_t*); void __go_makecontext(__go_context_t*, void (*)(), void*, size_t); #else #define __go_context_t ucontext_t #define __go_getcontext(c) getcontext(c) #define __go_setcontext(c) setcontext(c) #define __go_makecontext(c, fn, sp, size) \ ((c)->uc_stack.ss_sp = sp, (c)->uc_stack.ss_size = size, makecontext(c, fn, 0)) #endif // Symbols defined by the linker. extern const char _etext[] __attribute__ ((weak)); extern const char _edata[] __attribute__ ((weak)); #ifdef _AIX // Following symbols do not exist on AIX #define __etext nil #define __data_start nil #define __edata nil #define __bss_start nil #else extern const char __etext[] __attribute__ ((weak)); extern const char __data_start[] __attribute__ ((weak)); extern const char __edata[] __attribute__ ((weak)); extern const char __bss_start[] __attribute__ ((weak)); #endif