X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fruntime%2Flinux-os.c;h=c1a0a24cf36c537cf1045390438c0c39c36a8e89;hb=3f757cc9b3d6f14600365b7c0dd7d213269d7242;hp=1256cd93f450d53809f7f979dbd988a12ba3898d;hpb=f7b3fe1bd86348bfd2a3c506e437084752142c83;p=sbcl.git diff --git a/src/runtime/linux-os.c b/src/runtime/linux-os.c index 1256cd9..c1a0a24 100644 --- a/src/runtime/linux-os.c +++ b/src/runtime/linux-os.c @@ -28,10 +28,12 @@ #include "os.h" #include "arch.h" #include "globals.h" -#include "sbcl.h" #include "interrupt.h" #include "interr.h" #include "lispregs.h" +#include "runtime.h" +#include "genesis/static-symbols.h" +#include "genesis/fdefn.h" #include #include @@ -47,51 +49,66 @@ #include "thread.h" size_t os_vm_page_size; +#ifdef LISP_FEATURE_SB_THREAD +#include +#include + +/* values taken from the kernel's linux/futex.h. This header file + doesn't exist in userspace, which is our excuse for not grovelling + them automatically */ +#define FUTEX_WAIT (0) +#define FUTEX_WAKE (1) +#define FUTEX_FD (2) +#define FUTEX_REQUEUE (3) + +#define __NR_sys_futex __NR_futex + +_syscall4(int,sys_futex, + int *, futex, + int, op, + int, val, + struct timespec *, rel); +#endif + #include "gc.h" int linux_sparc_siginfo_bug = 0; +int linux_no_threads_p = 0; -void os_init(void) +void +os_init(void) { /* Conduct various version checks: do we have enough mmap(), is * this a sparc running 2.2, can we do threads? */ - { - struct utsname name; - int major_version; - int minor_version; - char *p; - uname(&name); - p=name.release; - major_version = atoi(p); - p=strchr(p,'.')+1; - minor_version = atoi(p); - if (major_version<2) { - lose("linux kernel version too old: major version=%d (can't run in version < 2.0.0)", - major_version); - } #ifdef LISP_FEATURE_SB_THREAD - if ((major_version <2) || (major_version==2 && minor_version < 4)) { - lose("linux kernel 2.4 required for thread-enabled SBCL"); - } + int *futex=0; #endif + struct utsname name; + int major_version; + int minor_version; + char *p; + uname(&name); + p=name.release; + major_version = atoi(p); + p=strchr(p,'.')+1; + minor_version = atoi(p); + if (major_version<2) { + lose("linux kernel version too old: major version=%d (can't run in version < 2.0.0)", + major_version); + } + if (!(major_version>2 || minor_version >= 4)) { #ifdef LISP_FEATURE_SPARC - if ((major_version <2) || (major_version==2 && minor_version < 4)) { - FSHOW((stderr,"linux kernel %d.%d predates 2.4;\n enabling workarounds for SPARC kernel bugs in signal handling.\n", major_version,minor_version)); - linux_sparc_siginfo_bug = 1; - } + FSHOW((stderr,"linux kernel %d.%d predates 2.4;\n enabling workarounds for SPARC kernel bugs in signal handling.\n", major_version,minor_version)); + linux_sparc_siginfo_bug = 1; #endif } - - os_vm_page_size = getpagesize(); - /* This could just as well be in arch_init(), but it's not. */ -#ifdef LISP_FEATURE_X86 - /* FIXME: This used to be here. However, I have just removed it - with no apparent ill effects (it may be that earlier kernels - started up a process with a different set of traps, or - something?) Find out what this was meant to do, and reenable it - or delete it if possible. -- CSR, 2002-07-15 */ - /* SET_FPU_CONTROL_WORD(0x1372|4|8|16|32); no interrupts */ +#ifdef LISP_FEATURE_SB_THREAD + futex_wait(futex,-1); + if(errno==ENOSYS) linux_no_threads_p = 1; + if(linux_no_threads_p) + fprintf(stderr,"Linux with NPTL support (e.g. kernel 2.6 or newer) required for \nthread-enabled SBCL. Disabling thread support.\n\n"); #endif + os_vm_page_size = getpagesize(); } @@ -144,17 +161,16 @@ os_invalidate(os_vm_address_t addr, os_vm_size_t len) os_vm_address_t os_map(int fd, int offset, os_vm_address_t addr, os_vm_size_t len) { - addr = mmap(addr, len, - OS_VM_PROT_ALL, - MAP_PRIVATE | MAP_FILE | MAP_FIXED, - fd, (off_t) offset); + os_vm_address_t actual; - if (addr == MAP_FAILED) { + actual = mmap(addr, len, OS_VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED, + fd, (off_t) offset); + if (actual == MAP_FAILED || (addr && (addr != actual))) { perror("mmap"); lose("unexpected mmap(..) failure"); } - return addr; + return actual; } void @@ -165,30 +181,28 @@ os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot) } } -/* FIXME: Now that FOO_END, rather than FOO_SIZE, is the fundamental - * description of a space, we could probably punt this and just do - * (FOO_START <= x && x < FOO_END) everywhere it's called. */ -static boolean -in_range_p(os_vm_address_t a, lispobj sbeg, size_t slen) -{ - char* beg = (char*)((long)sbeg); - char* end = (char*)((long)sbeg) + slen; - char* adr = (char*)a; - return (adr >= beg && adr < end); -} - boolean is_valid_lisp_addr(os_vm_address_t addr) { struct thread *th; - if(in_range_p(addr, READ_ONLY_SPACE_START, READ_ONLY_SPACE_SIZE) || - in_range_p(addr, STATIC_SPACE_START , STATIC_SPACE_SIZE) || - in_range_p(addr, DYNAMIC_SPACE_START , DYNAMIC_SPACE_SIZE)) + size_t ad = (size_t) addr; + + if ((READ_ONLY_SPACE_START <= ad && ad < READ_ONLY_SPACE_END) + || (STATIC_SPACE_START <= ad && ad < STATIC_SPACE_END) +#if defined LISP_FEATURE_GENCGC + || (DYNAMIC_SPACE_START <= ad && ad < DYNAMIC_SPACE_END) +#else + || (DYNAMIC_0_SPACE_START <= ad && ad < DYNAMIC_SPACE_END) + || (DYNAMIC_1_SPACE_START <= ad && ad < DYNAMIC_SPACE_END) +#endif + ) return 1; for_each_thread(th) { - if((th->control_stack_start <= addr) && (addr < th->control_stack_end)) + if((size_t)(th->control_stack_start) <= ad + && ad < (size_t)(th->control_stack_end)) return 1; - if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE)) + if((size_t)(th->binding_stack_start) <= ad + && ad < (size_t)(th->binding_stack_start + BINDING_STACK_SIZE)) return 1; } return 0; @@ -205,14 +219,18 @@ is_valid_lisp_addr(os_vm_address_t addr) * The GENCGC needs to be hooked into whatever signal is raised for * page fault on this OS. */ -void +static void sigsegv_handler(int signal, siginfo_t *info, void* void_context) { os_context_t *context = arch_os_get_context(&void_context); - void* fault_addr = (void*)context->uc_mcontext.cr2; + void* fault_addr = (void*)info->si_addr; if (!gencgc_handle_wp_violation(fault_addr)) - if(!handle_control_stack_guard_triggered(context,fault_addr)) - interrupt_handle_now(signal, info, void_context); + if(!handle_guard_page_triggered(context,fault_addr)) +#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK + arrange_return_to_lisp_function(context, SymbolFunction(MEMORY_FAULT_ERROR)); +#else + interrupt_handle_now(signal, info, context); +#endif } #else @@ -221,41 +239,29 @@ static void sigsegv_handler(int signal, siginfo_t *info, void* void_context) { os_context_t *context = arch_os_get_context(&void_context); - os_vm_address_t addr; + os_vm_address_t addr = arch_get_bad_addr(signal,info,context); + +#ifdef LISP_FEATURE_ALPHA + /* Alpha stuff: This is the end of a pseudo-atomic section during + which a signal was received. We must deal with the pending + interrupt (see also interrupt.c, ../code/interrupt.lisp) - addr = arch_get_bad_addr(signal,info,context); + (how we got here: when interrupting, we set bit 63 in reg_ALLOC. + At the end of the atomic section we tried to write to reg_ALLOC, + got a SIGSEGV (there's nothing mapped there) so ended up here. */ if (addr != NULL && *os_context_register_addr(context,reg_ALLOC) & (1L<<63)){ - - /* Alpha stuff: This is the end of a pseudo-atomic section - * during which a signal was received. We must deal with the - * pending interrupt (see also interrupt.c, - * ../code/interrupt.lisp) - */ - /* (how we got here: when interrupting, we set bit 63 in - * reg_Alloc. At the end of the atomic section we tried to - * write to reg_ALLOC, got a SIGSEGV (there's nothing mapped - * there) so ended up here - */ *os_context_register_addr(context,reg_ALLOC) -= (1L<<63); interrupt_handle_pending(context); - } else { - if(!interrupt_maybe_gc(signal, info, context)) - if(!handle_control_stack_guard_triggered(context,addr)) - interrupt_handle_now(signal, info, context); + return; } -} #endif -void sigcont_handler(int signal, siginfo_t *info, void *void_context) -{ - /* We need to have a handler installed for this signal so that - * sigwaitinfo() for it actually returns at the appropriate time. - * We don't need it to actually do anything. This mkes it - * possibly the only signal handler in SBCL that doesn't depend on - * not-guaranteed-by-POSIX features - */ + if(!interrupt_maybe_gc(signal, info, context)) + if(!handle_guard_page_triggered(context,addr)) + interrupt_handle_now(signal, info, context); } +#endif void os_install_interrupt_handlers(void) @@ -264,11 +270,25 @@ os_install_interrupt_handlers(void) sigsegv_handler); #ifdef LISP_FEATURE_SB_THREAD undoably_install_low_level_interrupt_handler(SIG_INTERRUPT_THREAD, - handle_rt_signal); + interrupt_thread_handler); undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC, sig_stop_for_gc_handler); + undoably_install_low_level_interrupt_handler(SIG_THREAD_EXIT, + thread_exit_handler); #endif - undoably_install_low_level_interrupt_handler(SIGCONT, - sigcont_handler); } +#ifdef LISP_FEATURE_SB_THREAD +int +futex_wait(int *lock_word, int oldval) +{ + int t= sys_futex(lock_word,FUTEX_WAIT,oldval, 0); + return t; +} + +int +futex_wake(int *lock_word, int n) +{ + return sys_futex(lock_word,FUTEX_WAKE,n,0); +} +#endif