186 lines
3.2 KiB
C
186 lines
3.2 KiB
C
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include <unistd.h>
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#include "runtime.h"
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#include "array.h"
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#include "go-panic.h"
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#include "go-string.h"
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uint32 runtime_panicking;
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static Lock paniclk;
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void
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runtime_startpanic(void)
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{
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M *m;
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m = runtime_m();
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if(m->dying) {
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runtime_printf("panic during panic\n");
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runtime_exit(3);
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}
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m->dying = 1;
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runtime_xadd(&runtime_panicking, 1);
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runtime_lock(&paniclk);
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}
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void
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runtime_dopanic(int32 unused __attribute__ ((unused)))
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{
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/*
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static bool didothers;
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if(g->sig != 0)
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runtime_printf("[signal %x code=%p addr=%p pc=%p]\n",
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g->sig, g->sigcode0, g->sigcode1, g->sigpc);
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if(runtime_gotraceback()){
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if(!didothers) {
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didothers = true;
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runtime_tracebackothers(g);
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}
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}
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*/
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runtime_unlock(&paniclk);
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if(runtime_xadd(&runtime_panicking, -1) != 0) {
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// Some other m is panicking too.
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// Let it print what it needs to print.
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// Wait forever without chewing up cpu.
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// It will exit when it's done.
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static Lock deadlock;
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runtime_lock(&deadlock);
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runtime_lock(&deadlock);
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}
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runtime_exit(2);
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}
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void
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runtime_throw(const char *s)
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{
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runtime_startpanic();
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runtime_printf("throw: %s\n", s);
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runtime_dopanic(0);
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*(int32*)0 = 0; // not reached
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runtime_exit(1); // even more not reached
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}
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void
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runtime_panicstring(const char *s)
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{
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Eface err;
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if(runtime_m()->gcing) {
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runtime_printf("panic: %s\n", s);
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runtime_throw("panic during gc");
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}
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runtime_newErrorString(runtime_gostringnocopy((const byte*)s), &err);
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runtime_panic(err);
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}
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static int32 argc;
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static byte** argv;
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extern Slice os_Args asm ("libgo_os.os.Args");
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extern Slice syscall_Envs asm ("libgo_syscall.syscall.Envs");
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void
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runtime_args(int32 c, byte **v)
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{
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argc = c;
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argv = v;
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}
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void
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runtime_goargs(void)
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{
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String *s;
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int32 i;
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// for windows implementation see "os" package
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if(Windows)
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return;
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s = runtime_malloc(argc*sizeof s[0]);
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for(i=0; i<argc; i++)
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s[i] = runtime_gostringnocopy((const byte*)argv[i]);
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os_Args.__values = (void*)s;
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os_Args.__count = argc;
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os_Args.__capacity = argc;
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}
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void
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runtime_goenvs(void)
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{
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String *s;
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int32 i, n;
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for(n=0; argv[argc+1+n] != 0; n++)
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;
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s = runtime_malloc(n*sizeof s[0]);
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for(i=0; i<n; i++)
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s[i] = runtime_gostringnocopy(argv[argc+1+i]);
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syscall_Envs.__values = (void*)s;
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syscall_Envs.__count = n;
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syscall_Envs.__capacity = n;
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}
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const byte*
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runtime_getenv(const char *s)
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{
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int32 i, j, len;
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const byte *v, *bs;
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String* envv;
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int32 envc;
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bs = (const byte*)s;
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len = runtime_findnull(bs);
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envv = (String*)syscall_Envs.__values;
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envc = syscall_Envs.__count;
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for(i=0; i<envc; i++){
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if(envv[i].__length <= len)
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continue;
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v = (const byte*)envv[i].__data;
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for(j=0; j<len; j++)
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if(bs[j] != v[j])
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goto nomatch;
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if(v[len] != '=')
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goto nomatch;
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return v+len+1;
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nomatch:;
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}
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return nil;
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}
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int32
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runtime_atoi(const byte *p)
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{
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int32 n;
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n = 0;
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while('0' <= *p && *p <= '9')
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n = n*10 + *p++ - '0';
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return n;
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}
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uint32
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runtime_fastrand1(void)
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{
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M *m;
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uint32 x;
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m = runtime_m();
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x = m->fastrand;
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x += x;
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if(x & 0x80000000L)
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x ^= 0x88888eefUL;
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m->fastrand = x;
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return x;
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}
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