1 // Copyright 2009 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
10 #include "go-string.h"
12 uint32 runtime_panicking;
15 runtime_gotraceback(void)
19 p = runtime_getenv("GOTRACEBACK");
20 if(p == nil || p[0] == '\0')
21 return 1; // default is on
22 return runtime_atoi(p);
28 runtime_startpanic(void)
34 runtime_printf("panic during panic\n");
38 runtime_xadd(&runtime_panicking, 1);
39 runtime_lock(&paniclk);
43 runtime_dopanic(int32 unused __attribute__ ((unused)))
46 static bool didothers;
50 runtime_printf("[signal %x code=%p addr=%p]\n",
51 g->sig, (void*)(g->sigcode0), (void*)(g->sigcode1));
53 if(runtime_gotraceback()){
54 if(g != runtime_m()->g0) {
56 runtime_goroutineheader(g);
58 runtime_goroutinetrailer(g);
62 runtime_tracebackothers(g);
66 runtime_unlock(&paniclk);
67 if(runtime_xadd(&runtime_panicking, -1) != 0) {
68 // Some other m is panicking too.
69 // Let it print what it needs to print.
70 // Wait forever without chewing up cpu.
71 // It will exit when it's done.
73 runtime_lock(&deadlock);
74 runtime_lock(&deadlock);
81 runtime_throw(const char *s)
84 runtime_printf("throw: %s\n", s);
86 *(int32*)0 = 0; // not reached
87 runtime_exit(1); // even more not reached
91 runtime_panicstring(const char *s)
95 if(runtime_m()->gcing) {
96 runtime_printf("panic: %s\n", s);
97 runtime_throw("panic during gc");
99 runtime_newErrorString(runtime_gostringnocopy((const byte*)s), &err);
106 extern Slice os_Args asm ("os.Args");
107 extern Slice syscall_Envs asm ("syscall.Envs");
110 runtime_args(int32 c, byte **v)
122 // for windows implementation see "os" package
126 s = runtime_malloc(argc*sizeof s[0]);
127 for(i=0; i<argc; i++)
128 s[i] = runtime_gostringnocopy((const byte*)argv[i]);
129 os_Args.__values = (void*)s;
130 os_Args.__count = argc;
131 os_Args.__capacity = argc;
135 runtime_goenvs_unix(void)
140 for(n=0; argv[argc+1+n] != 0; n++)
143 s = runtime_malloc(n*sizeof s[0]);
145 s[i] = runtime_gostringnocopy(argv[argc+1+i]);
146 syscall_Envs.__values = (void*)s;
147 syscall_Envs.__count = n;
148 syscall_Envs.__capacity = n;
152 runtime_getenv(const char *s)
160 len = runtime_findnull(bs);
161 envv = (String*)syscall_Envs.__values;
162 envc = syscall_Envs.__count;
163 for(i=0; i<envc; i++){
164 if(envv[i].__length <= len)
166 v = (const byte*)envv[i].__data;
179 runtime_atoi(const byte *p)
184 while('0' <= *p && *p <= '9')
185 n = n*10 + *p++ - '0';
190 runtime_fastrand1(void)
204 static struct root_list runtime_roots =
206 { { &syscall_Envs, sizeof syscall_Envs },
207 { &os_Args, sizeof os_Args },
214 __go_register_gc_roots(&runtime_roots);
218 runtime_cputicks(void)
220 #if defined(__386__) || defined(__x86_64__)
222 asm("rdtsc" : "=a" (low), "=d" (high));
223 return (int64)(((uint64)high << 32) | (uint64)low);
225 // FIXME: implement for other processors.
231 runtime_showframe(const unsigned char *s)
233 static int32 traceback = -1;
236 traceback = runtime_gotraceback();
237 return traceback > 1 || (__builtin_strchr((const char*)s, '.') != nil && __builtin_memcmp(s, "runtime.", 7) != 0);
241 runtime_isInf(float64 f, int32 sign)
243 if(!__builtin_isinf(f))