diff options
Diffstat (limited to 'source/l/gc/noelision.patch')
| -rw-r--r-- | source/l/gc/noelision.patch | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/source/l/gc/noelision.patch b/source/l/gc/noelision.patch deleted file mode 100644 index 0e1515ea..00000000 --- a/source/l/gc/noelision.patch +++ /dev/null @@ -1,127 +0,0 @@ -diff --git c/include/private/gc_priv.h w/include/private/gc_priv.h -index 0ad92fc..b877fac 100644 ---- c/include/private/gc_priv.h -+++ w/include/private/gc_priv.h -@@ -2368,6 +2368,7 @@ GC_INNER ptr_t GC_store_debug_info(ptr_t p, word sz, const char *str, - /* GC_notify_all_builder() is called when GC_fl_builder_count */ - /* reaches 0. */ - -+ GC_INNER void GC_setup_mark_lock(void); - GC_INNER void GC_acquire_mark_lock(void); - GC_INNER void GC_release_mark_lock(void); - GC_INNER void GC_notify_all_builder(void); -diff --git c/include/private/gcconfig.h w/include/private/gcconfig.h -index c753cc2..b5ed075 100644 ---- c/include/private/gcconfig.h -+++ w/include/private/gcconfig.h -@@ -1357,6 +1357,11 @@ - # define PREFETCH_FOR_WRITE(x) \ - __asm__ __volatile__ ("prefetchw %0" : : "m"(*(char *)(x))) - # endif -+# if defined(__GLIBC__) -+ /* Workaround lock elision implementation for some glibc. */ -+# define GLIBC_2_19_TSX_BUG -+# include <gnu/libc-version.h> /* for gnu_get_libc_version() */ -+# endif - # endif - # ifdef CYGWIN32 - # define OS_TYPE "CYGWIN32" -@@ -2257,6 +2262,11 @@ - /* FIXME: This seems to be fixed in GLibc v2.14. */ - # define GETCONTEXT_FPU_EXCMASK_BUG - # endif -+# if defined(__GLIBC__) -+ /* Workaround lock elision implementation for some glibc. */ -+# define GLIBC_2_19_TSX_BUG -+# include <gnu/libc-version.h> /* for gnu_get_libc_version() */ -+# endif - # endif - # ifdef DARWIN - # define OS_TYPE "DARWIN" -diff --git c/include/private/pthread_support.h w/include/private/pthread_support.h -index 525a9aa..017f194 100644 ---- c/include/private/pthread_support.h -+++ w/include/private/pthread_support.h -@@ -148,6 +148,8 @@ GC_INNER_PTHRSTART GC_thread GC_start_rtn_prepare_thread( - struct GC_stack_base *sb, void *arg); - GC_INNER_PTHRSTART void GC_thread_exit_proc(void *); - -+GC_INNER void GC_setup_mark_lock(void); -+ - #endif /* GC_PTHREADS && !GC_WIN32_THREADS */ - - #endif /* GC_PTHREAD_SUPPORT_H */ -diff --git c/misc.c w/misc.c -index df434a1..3aca41d 100644 ---- c/misc.c -+++ w/misc.c -@@ -875,6 +875,9 @@ GC_API void GC_CALL GC_init(void) - /* else */ InitializeCriticalSection (&GC_allocate_ml); - } - # endif /* GC_WIN32_THREADS */ -+# if defined(GC_PTHREADS) && !defined(GC_WIN32_THREADS) -+ GC_setup_mark_lock(); -+# endif /* GC_PTHREADS */ - # if (defined(MSWIN32) || defined(MSWINCE)) && defined(THREADS) - InitializeCriticalSection(&GC_write_cs); - # endif -diff --git c/pthread_support.c w/pthread_support.c -index c00b93d..8a7c50b 100644 ---- c/pthread_support.c -+++ w/pthread_support.c -@@ -1979,6 +1979,55 @@ GC_INNER void GC_lock(void) - - static pthread_cond_t builder_cv = PTHREAD_COND_INITIALIZER; - -+#ifdef GLIBC_2_19_TSX_BUG -+ /* Parse string like <major>[.<minor>[<tail>]] and return major value. */ -+ static int parse_version(int *pminor, const char *pverstr) { -+ char *endp; -+ unsigned long value = strtoul(pverstr, &endp, 10); -+ int major = (int)value; -+ -+ if (major < 0 || (char *)pverstr == endp || (unsigned)major != value) { -+ /* Parse error */ -+ return -1; -+ } -+ if (*endp != '.') { -+ /* No minor part. */ -+ *pminor = -1; -+ } else { -+ value = strtoul(endp + 1, &endp, 10); -+ *pminor = (int)value; -+ if (*pminor < 0 || (unsigned)(*pminor) != value) { -+ return -1; -+ } -+ } -+ return major; -+ } -+#endif /* GLIBC_2_19_TSX_BUG */ -+ -+GC_INNER void GC_setup_mark_lock(void) -+{ -+# ifdef GLIBC_2_19_TSX_BUG -+ pthread_mutexattr_t mattr; -+ int glibc_minor = -1; -+ int glibc_major = parse_version(&glibc_minor, gnu_get_libc_version()); -+ -+ if (glibc_major > 2 || (glibc_major == 2 && glibc_minor >= 19)) { -+ /* TODO: disable this workaround for glibc with fixed TSX */ -+ /* This disables lock elision to workaround a bug in glibc 2.19+ */ -+ if (0 != pthread_mutexattr_init(&mattr)) { -+ ABORT("pthread_mutexattr_init failed"); -+ } -+ if (0 != pthread_mutexattr_settype(&mattr, PTHREAD_MUTEX_NORMAL)) { -+ ABORT("pthread_mutexattr_settype failed"); -+ } -+ if (0 != pthread_mutex_init(&mark_mutex, &mattr)) { -+ ABORT("pthread_mutex_init failed"); -+ } -+ pthread_mutexattr_destroy(&mattr); -+ } -+# endif -+} -+ - GC_INNER void GC_acquire_mark_lock(void) - { - GC_ASSERT(GC_mark_lock_holder != NUMERIC_THREAD_ID(pthread_self())); |