X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fbsd-os.c;h=a364d5a0b0ef5f69e5d441df7961b8b17e559da2;hb=c2ac5ba3964165ee2d21ccd4c6bf8bdc48e1a165;hp=bcca635806124cd7a53e0372826438920b06a95d;hpb=34dcb46f78a01d543756703d7ccdf3d999a134d0;p=sbcl.git diff --git a/src/runtime/bsd-os.c b/src/runtime/bsd-os.c index bcca635..a364d5a 100644 --- a/src/runtime/bsd-os.c +++ b/src/runtime/bsd-os.c @@ -21,6 +21,10 @@ #include #include #include +#include +#include +#include +#include "sbcl.h" #include "./signal.h" #include "os.h" #include "arch.h" @@ -28,81 +32,61 @@ #include "interrupt.h" #include "interr.h" #include "lispregs.h" -#include "sbcl.h" +#include "thread.h" +#include "runtime.h" +#include "genesis/static-symbols.h" +#include "genesis/fdefn.h" #include #include /* #include */ -#include #include "validate.h" -vm_size_t os_vm_page_size; +#if defined LISP_FEATURE_GENCGC +#include "gencgc-internal.h" +#endif + +os_vm_size_t os_vm_page_size; +#ifdef __NetBSD__ +#include +#include +#include +#include /* For the stat-family wrappers. */ +#include /* For the opendir()/readdir() wrappers */ +#include /* For the socket() wrapper */ +static void netbsd_init(); +#endif /* __NetBSD__ */ -/* The different BSD variants have diverged in exactly where they - * store signal context information, but at least they tend to use the - * same stems to name the structure fields, so by using this macro we - * can share a fair amount of code between different variants. */ -#if defined __FreeBSD__ -#define CONTEXT_ADDR_FROM_STEM(stem) &context->uc_mcontext.mc_ ## stem -#elif defined __OpenBSD__ -#define CONTEXT_ADDR_FROM_STEM(stem) &context->sc_ ## stem -#else -#error unsupported BSD variant +#ifdef __FreeBSD__ +#include +#if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX) +#include #endif - -void -os_init(void) -{ - os_vm_page_size = getpagesize(); -} -/* KLUDGE: There is strong family resemblance in the signal context - * stuff in FreeBSD and OpenBSD, but in detail they're different in - * almost every line of code. It would be nice to find some way to - * factor out the commonality better; failing that, it might be best - * just to split this generic-BSD code into one variant for each BSD. */ - -int * -os_context_register_addr(os_context_t *context, int offset) -{ - switch(offset) { - case 0: - return CONTEXT_ADDR_FROM_STEM(eax); - case 2: - return CONTEXT_ADDR_FROM_STEM(ecx); - case 4: - return CONTEXT_ADDR_FROM_STEM(edx); - case 6: - return CONTEXT_ADDR_FROM_STEM(ebx); - case 8: - return CONTEXT_ADDR_FROM_STEM(esp); - case 10: - return CONTEXT_ADDR_FROM_STEM(ebp); - case 12: - return CONTEXT_ADDR_FROM_STEM(esi); - case 14: - return CONTEXT_ADDR_FROM_STEM(edi); - default: - return 0; - } -} +static void freebsd_init(); +#endif /* __FreeBSD__ */ -int * -os_context_pc_addr(os_context_t *context) -{ -#if defined __FreeBSD__ - return CONTEXT_ADDR_FROM_STEM(eip); -#elif defined __OpenBSD__ - return CONTEXT_ADDR_FROM_STEM(pc); -#else -#error unsupported BSD variant +#ifdef __OpenBSD__ +#include +#include +#include +#include + +static void openbsd_init(); #endif -} -int * -os_context_sp_addr(os_context_t *context) +void +os_init(char *argv[], char *envp[]) { - return CONTEXT_ADDR_FROM_STEM(esp); + os_vm_page_size = getpagesize(); + +#ifdef __NetBSD__ + netbsd_init(); +#elif defined(__FreeBSD__) + freebsd_init(); +#elif defined(__OpenBSD__) + openbsd_init(); +#endif } sigset_t * @@ -111,9 +95,9 @@ os_context_sigmask_addr(os_context_t *context) /* (Unlike most of the other context fields that we access, the * signal mask field is a field of the basic, outermost context * struct itself both in FreeBSD 4.0 and in OpenBSD 2.6.) */ -#if defined __FreeBSD__ +#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(LISP_FEATURE_DARWIN) return &context->uc_sigmask; -#elif defined __OpenBSD__ +#elif defined (__OpenBSD__) return &context->sc_mask; #else #error unsupported BSD variant @@ -126,13 +110,13 @@ os_validate(os_vm_address_t addr, os_vm_size_t len) int flags = MAP_PRIVATE | MAP_ANON; if (addr) - flags |= MAP_FIXED; + flags |= MAP_FIXED; addr = mmap(addr, len, OS_VM_PROT_ALL, flags, -1, 0); if (addr == MAP_FAILED) { - perror("mmap"); - return NULL; + perror("mmap"); + return NULL; } return addr; @@ -142,39 +126,30 @@ void os_invalidate(os_vm_address_t addr, os_vm_size_t len) { if (munmap(addr, len) == -1) - perror("munmap"); + perror("munmap"); } 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_PROT_ALL, + MAP_PRIVATE | MAP_FILE | MAP_FIXED, + fd, (off_t) offset); if (addr == MAP_FAILED) { - perror("mmap"); - lose("unexpected mmap(..) failure"); + perror("mmap"); + lose("unexpected mmap(..) failure\n"); } return addr; } -/* FIXME: If this can be a no-op on BSD/x86, then it - * deserves a more precise name. - * - * (Perhaps os_prepare_data_area_to_be_executed()?) */ -void -os_flush_icache(os_vm_address_t address, os_vm_size_t length) -{ -} - void os_protect(os_vm_address_t address, os_vm_size_t length, os_vm_prot_t prot) { if (mprotect(address, length, prot) == -1) { - perror("mprotect"); + perror("mprotect"); } } @@ -191,15 +166,18 @@ 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)) - return 1; + + 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)) + return 1; for_each_thread(th) { - if((th->control_stack_start <= addr) && (addr < th->control_stack_end)) - return 1; - if(in_range_p(addr, th->binding_stack_start, BINDING_STACK_SIZE)) - return 1; + if (((os_vm_address_t)th->control_stack_start <= addr) && + (addr < (os_vm_address_t)th->control_stack_end)) + return 1; + if (in_range_p(addr, (lispobj) th->binding_stack_start, + BINDING_STACK_SIZE)) + return 1; } return 0; } @@ -214,40 +192,360 @@ 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. */ -static void -memory_fault_handler(int signal, siginfo_t *siginfo, void *void_context) -{ - /* The way that we extract low level information like the fault - * address is not specified by POSIX. */ -#if defined __FreeBSD__ - void *fault_addr = siginfo->si_addr; -#elif defined __OpenBSD__ - void *fault_addr = siginfo->si_addr; -#else -#error unsupported BSD variant + +void +memory_fault_handler(int signal, siginfo_t *siginfo, void *void_context +#if defined(LISP_FEATURE_FREEBSD) && defined(LISP_FEATURE_X86_64) +/* FreeBSD/amd64 stores fault address only in undocumented 4th arg. */ + ,void *fault_addr #endif + ) +{ os_context_t *context = arch_os_get_context(&void_context); - if (!gencgc_handle_wp_violation(fault_addr)) - if(!handle_control_stack_guard_triggered(context,fault_addr)) - /* FIXME is this context or void_context? not that it */ - /* makes a difference currently except on linux/sparc */ - interrupt_handle_now(signal, siginfo, void_context); +#if defined(LISP_FEATURE_FREEBSD) && defined(LISP_FEATURE_X86_64) + /* KLUDGE: Store fault address into si_addr for compatibilities. */ + siginfo->si_addr = fault_addr; +#else + void *fault_addr = arch_get_bad_addr(signal, siginfo, context); +#endif + +#if defined(LISP_FEATURE_RESTORE_TLS_SEGMENT_REGISTER_FROM_CONTEXT) + FSHOW_SIGNAL((stderr, "/ TLS: restoring fs: %p in memory_fault_handler\n", + *CONTEXT_ADDR_FROM_STEM(fs))); + os_restore_tls_segment_register(context); +#endif + + FSHOW((stderr, "Memory fault at: %p, PC: %p\n", fault_addr, *os_context_pc_addr(context))); + + if (!gencgc_handle_wp_violation(fault_addr)) + if(!handle_guard_page_triggered(context,fault_addr)) { +#ifdef LISP_FEATURE_C_STACK_IS_CONTROL_STACK + lisp_memory_fault_error(context, fault_addr); +#else + if (!maybe_gc(context)) { + interrupt_handle_now(signal, siginfo, context); + } +#endif + } +} + +#if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER) +void +mach_error_memory_fault_handler(int signal, siginfo_t *siginfo, void *void_context) { + lose("Unhandled memory fault. Exiting."); } +#endif + void os_install_interrupt_handlers(void) { SHOW("os_install_interrupt_handlers()/bsd-os/defined(GENCGC)"); +#if defined(LISP_FEATURE_MACH_EXCEPTION_HANDLER) + undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT, + mach_error_memory_fault_handler); +#else undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT, - memory_fault_handler); +#ifdef LISP_FEATURE_FREEBSD + (__siginfohandler_t *) +#endif + memory_fault_handler); +#endif + +#ifdef LISP_FEATURE_SB_THREAD + undoably_install_low_level_interrupt_handler(SIG_INTERRUPT_THREAD, + interrupt_thread_handler); + undoably_install_low_level_interrupt_handler(SIG_STOP_FOR_GC, + sig_stop_for_gc_handler); +#ifdef SIG_RESUME_FROM_GC + undoably_install_low_level_interrupt_handler(SIG_RESUME_FROM_GC, + sig_stop_for_gc_handler); +#endif +#endif SHOW("leaving os_install_interrupt_handlers()"); } -#else -/* As of 2002.07.31, this configuration has never been tested */ +#else /* Currently PPC/Darwin/Cheney only */ + +static void +sigsegv_handler(int signal, siginfo_t *info, void* void_context) +{ + os_context_t *context = arch_os_get_context(&void_context); +#if 0 + unsigned int pc = (unsigned int *)(*os_context_pc_addr(context)); +#endif + os_vm_address_t addr; + + addr = arch_get_bad_addr(signal, info, context); + if (!cheneygc_handle_wp_violation(context, addr)) + if (!handle_guard_page_triggered(context, addr)) + interrupt_handle_now(signal, info, context); +} + void os_install_interrupt_handlers(void) { SHOW("os_install_interrupt_handlers()/bsd-os/!defined(GENCGC)"); + undoably_install_low_level_interrupt_handler(SIG_MEMORY_FAULT, + sigsegv_handler); } #endif /* defined GENCGC */ + +#ifdef __NetBSD__ +static void netbsd_init() +{ + struct rlimit rl; + int mib[2], osrev; + size_t len; + + /* Are we running on a sufficiently functional kernel? */ + mib[0] = CTL_KERN; + mib[1] = KERN_OSREV; + + len = sizeof(osrev); + sysctl(mib, 2, &osrev, &len, NULL, 0); + + /* If we're older than 2.0... */ + if (osrev < 200000000) { + fprintf(stderr, "osrev = %d (needed at least 200000000).\n", osrev); + lose("NetBSD kernel too old to run sbcl.\n"); + } + + /* NetBSD counts mmap()ed space against the process's data size limit, + * so yank it up. This might be a nasty thing to do? */ + getrlimit (RLIMIT_DATA, &rl); + /* Amazingly for such a new port, the provenance and meaning of + this number are unknown. It might just mean REALLY_BIG_LIMIT, + or possibly it should be calculated from dynamic space size. + -- CSR, 2004-04-08 */ + rl.rlim_cur = 1073741824; + if (setrlimit (RLIMIT_DATA, &rl) < 0) { + fprintf (stderr, + "RUNTIME WARNING: unable to raise process data size limit:\n\ + %s.\n\ +The system may fail to start.\n", + strerror(errno)); + } +} + +/* Various routines in NetBSD's C library are compatibility wrappers + for old versions. Programs must be processed by the C toolchain in + order to get up-to-date definitions of such routines. */ +/* The stat-family, opendir, and readdir are used only in sb-posix, as + of 2007-01-16. -- RMK */ +int +_stat(const char *path, struct stat *sb) +{ + return stat(path, sb); +} +int +_lstat(const char *path, struct stat *sb) +{ + return lstat(path, sb); +} +int +_fstat(int fd, struct stat *sb) +{ + return fstat(fd, sb); +} + +DIR * +_opendir(const char *filename) +{ + return opendir(filename); +} +struct dirent * +_readdir(DIR *dirp) +{ + return readdir(dirp); +} + +/* Used in sb-bsd-sockets. */ +int +_socket(int domain, int type, int protocol) +{ + return socket(domain, type, protocol); +} +#endif /* __NetBSD__ */ + +#ifdef __FreeBSD__ +extern int getosreldate(void); + +int sig_memory_fault; + +static void freebsd_init() +{ + /* Memory fault signal on FreeBSD was changed from SIGBUS to + * SIGSEGV. */ + if (getosreldate() < 700004) + sig_memory_fault = SIGBUS; + else + sig_memory_fault = SIGSEGV; + + /* Quote from sbcl-devel (NIIMI Satoshi): "Some OSes, like FreeBSD + * 4.x with GENERIC kernel, does not enable SSE support even on + * SSE capable CPUs". Detect this situation and skip the + * fast_bzero sse/base selection logic that's normally done in + * x86-assem.S. + */ +#ifdef LISP_FEATURE_X86 + { + size_t len; + int instruction_sse; + + len = sizeof(instruction_sse); + if (sysctlbyname("hw.instruction_sse", &instruction_sse, &len, + NULL, 0) == 0 && instruction_sse != 0) { + /* Use the SSE detector */ + fast_bzero_pointer = fast_bzero_detect; + } + } +#endif /* LISP_FEATURE_X86 */ +} + +#if defined(LISP_FEATURE_SB_THREAD) && !defined(LISP_FEATURE_SB_PTHREAD_FUTEX) +int +futex_wait(int *lock_word, long oldval, long sec, unsigned long usec) +{ + struct timespec timeout; + int ret; + +again: + if (sec < 0) + ret = umtx_wait((void *)lock_word, oldval, NULL); + else { + timeout.tv_sec = sec; + timeout.tv_nsec = usec * 1000; + ret = umtx_wait((void *)lock_word, oldval, &timeout); + } + + switch (ret) { + case 0: + return 0; + case ETIMEDOUT: + return 1; + case EINTR: + /* spurious wakeup from interrupt */ + goto again; + default: + /* EWOULDBLOCK and others, need to check the lock */ + return -1; + } +} + +int +futex_wake(int *lock_word, int n) +{ + return umtx_wake((void *)lock_word, n); +} +#endif +#endif /* __FreeBSD__ */ + +#ifdef LISP_FEATURE_DARWIN +/* defined in ppc-darwin-os.c instead */ +#elif defined(LISP_FEATURE_FREEBSD) +#ifndef KERN_PROC_PATHNAME +#define KERN_PROC_PATHNAME 12 +#endif + +char * +os_get_runtime_executable_path() +{ + char path[PATH_MAX + 1]; + + if (getosreldate() >= 600024) { + /* KERN_PROC_PATHNAME is available */ + size_t len = PATH_MAX + 1; + int mib[4]; + + mib[0] = CTL_KERN; + mib[1] = KERN_PROC; + mib[2] = KERN_PROC_PATHNAME; + mib[3] = -1; + if (sysctl(mib, 4, &path, &len, NULL, 0) != 0) + return NULL; + } else { + int size; + size = readlink("/proc/curproc/file", path, sizeof(path) - 1); + if (size < 0) + return NULL; + path[size] = '\0'; + } + if (strcmp(path, "unknown") == 0) + return NULL; + return copied_string(path); +} +#elif defined(LISP_FEATURE_NETBSD) || defined(LISP_FEATURE_OPENBSD) +char * +os_get_runtime_executable_path() +{ + struct stat sb; + char *path = strdup("/proc/curproc/file"); + if (path && ((stat(path, &sb)) == 0)) + return path; + else { + fprintf(stderr, "Couldn't stat /proc/curproc/file; is /proc mounted?\n"); + return NULL; + } +} +#else /* Not DARWIN or FREEBSD or NETBSD or OPENBSD */ +char * +os_get_runtime_executable_path() +{ + return NULL; +} +#endif + +#ifdef __OpenBSD__ +void +openbsd_init() +{ + struct rlimit rl; + + /* OpenBSD, like NetBSD, counts mmap()ed space against the + * process's data size limit. If the soft limit is lower than the + * hard limit then try to yank it up, this lets users in the + * "staff" login class run sbcl with a default /etc/login.conf + */ + getrlimit (RLIMIT_DATA, &rl); + if (rl.rlim_cur < rl.rlim_max) { + rl.rlim_cur = rl.rlim_max; + if (setrlimit (RLIMIT_DATA, &rl) < 0) { + fprintf (stderr, + "RUNTIME WARNING: unable to raise process data size limit:\n\ + %s.\n\ +The system may fail to start.\n", + strerror(errno)); + } + } + + /* Display a (hopefully) helpful warning if it looks like we won't + * be able to allocate enough memory. In testing I found that on + * my system at least, a minimum of 25M on top of the three space + * sizes was needed to start SBCL. Show a warning below 32M so as + * to leave a little breathing room. + */ + getrlimit (RLIMIT_DATA, &rl); + if (dynamic_space_size + READ_ONLY_SPACE_SIZE + STATIC_SPACE_SIZE + + LINKAGE_TABLE_SPACE_SIZE + (32*1024*1024) > rl.rlim_cur) + fprintf (stderr, + "RUNTIME WARNING: data size resource limit may be too low,\n" + " try decreasing the dynamic space size with --dynamic-space-size\n"); +} + +/* OpenBSD's dlsym() relies on the gcc bulitin + * __builtin_return_address(0) returning an address in the + * executable's text segment, but when called from lisp it will return + * an address in the dynamic space. Work around this by calling this + * wrapper function instead. Note that tail-call optimization will + * defeat this, disable it by saving the dlsym() return value in a + * volatile variable. +*/ +void * +os_dlsym(void *handle, const char *symbol) +{ + void * volatile ret = dlsym(handle, symbol); + return ret; +} + +#endif