diff options
Diffstat (limited to 'libgo/runtime/thread-linux.c')
| -rw-r--r-- | libgo/runtime/thread-linux.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libgo/runtime/thread-linux.c b/libgo/runtime/thread-linux.c index 13d23c4..74139ea 100644 --- a/libgo/runtime/thread-linux.c +++ b/libgo/runtime/thread-linux.c @@ -15,6 +15,7 @@ // Futexsleep is allowed to wake up spuriously. #include <errno.h> +#include <signal.h> #include <string.h> #include <time.h> #include <sys/types.h> @@ -83,3 +84,48 @@ runtime_goenvs(void) { runtime_goenvs_unix(); } + +// Called to initialize a new m (including the bootstrap m). +// Called on the parent thread (main thread in case of bootstrap), can allocate memory. +void +runtime_mpreinit(M *mp) +{ + mp->gsignal = runtime_malg(32*1024, &mp->gsignalstack, &mp->gsignalstacksize); // OS X wants >=8K, Linux >=2K +} + +// Called to initialize a new m (including the bootstrap m). +// Called on the new thread, can not allocate memory. +void +runtime_minit(void) +{ + M* m; + sigset_t sigs; + + // Initialize signal handling. + m = runtime_m(); + runtime_signalstack(m->gsignalstack, m->gsignalstacksize); + if (sigemptyset(&sigs) != 0) + runtime_throw("sigemptyset"); + sigprocmask(SIG_SETMASK, &sigs, nil); +} + +// Called from dropm to undo the effect of an minit. +void +runtime_unminit(void) +{ + runtime_signalstack(nil, 0); +} + +void +runtime_signalstack(byte *p, int32 n) +{ + stack_t st; + + st.ss_sp = p; + st.ss_size = n; + st.ss_flags = 0; + if(p == nil) + st.ss_flags = SS_DISABLE; + if(sigaltstack(&st, nil) < 0) + *(int *)0xf1 = 0xf1; +} |