diff options
Diffstat (limited to 'nptl')
| -rw-r--r-- | nptl/allocatestack.c | 59 | ||||
| -rw-r--r-- | nptl/pthread_create.c | 38 |
2 files changed, 27 insertions, 70 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index 9be6c42..cfe37a3 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -33,47 +33,6 @@ #include <kernel-features.h> #include <nptl-stack.h> -#ifndef NEED_SEPARATE_REGISTER_STACK - -/* Most architectures have exactly one stack pointer. Some have more. */ -# define STACK_VARIABLES void *stackaddr = NULL - -/* How to pass the values to the 'create_thread' function. */ -# define STACK_VARIABLES_ARGS stackaddr - -/* How to declare function which gets there parameters. */ -# define STACK_VARIABLES_PARMS void *stackaddr - -/* How to declare allocate_stack. */ -# define ALLOCATE_STACK_PARMS void **stack - -/* This is how the function is called. We do it this way to allow - other variants of the function to have more parameters. */ -# define ALLOCATE_STACK(attr, pd) allocate_stack (attr, pd, &stackaddr) - -#else - -/* We need two stacks. The kernel will place them but we have to tell - the kernel about the size of the reserved address space. */ -# define STACK_VARIABLES void *stackaddr = NULL; size_t stacksize = 0 - -/* How to pass the values to the 'create_thread' function. */ -# define STACK_VARIABLES_ARGS stackaddr, stacksize - -/* How to declare function which gets there parameters. */ -# define STACK_VARIABLES_PARMS void *stackaddr, size_t stacksize - -/* How to declare allocate_stack. */ -# define ALLOCATE_STACK_PARMS void **stack, size_t *stacksize - -/* This is how the function is called. We do it this way to allow - other variants of the function to have more parameters. */ -# define ALLOCATE_STACK(attr, pd) \ - allocate_stack (attr, pd, &stackaddr, &stacksize) - -#endif - - /* Default alignment of stack. */ #ifndef STACK_ALIGN # define STACK_ALIGN __alignof__ (long double) @@ -252,7 +211,7 @@ advise_stack_range (void *mem, size_t size, uintptr_t pd, size_t guardsize) PDP must be non-NULL. */ static int allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, - ALLOCATE_STACK_PARMS) + void **stack, size_t *stacksize) { struct pthread *pd; size_t size; @@ -603,25 +562,17 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp, /* We place the thread descriptor at the end of the stack. */ *pdp = pd; -#if _STACK_GROWS_DOWN void *stacktop; -# if TLS_TCB_AT_TP +#if TLS_TCB_AT_TP /* The stack begins before the TCB and the static TLS block. */ stacktop = ((char *) (pd + 1) - tls_static_size_for_stack); -# elif TLS_DTV_AT_TP +#elif TLS_DTV_AT_TP stacktop = (char *) (pd - 1); -# endif +#endif -# ifdef NEED_SEPARATE_REGISTER_STACK + *stacksize = stacktop - pd->stackblock; *stack = pd->stackblock; - *stacksize = stacktop - *stack; -# else - *stack = stacktop; -# endif -#else - *stack = pd->stackblock; -#endif return 0; } diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index 440adc2..d8ec299 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -36,6 +36,7 @@ #include "libioP.h" #include <sys/single_threaded.h> #include <version.h> +#include <clone_internal.h> #include <shlib-compat.h> @@ -227,8 +228,8 @@ late_init (void) static int _Noreturn start_thread (void *arg); static int create_thread (struct pthread *pd, const struct pthread_attr *attr, - bool *stopped_start, STACK_VARIABLES_PARMS, - bool *thread_ran) + bool *stopped_start, void *stackaddr, + size_t stacksize, bool *thread_ran) { /* Determine whether the newly created threads has to be started stopped since we have to set the scheduling parameters or set the @@ -280,14 +281,18 @@ static int create_thread (struct pthread *pd, const struct pthread_attr *attr, TLS_DEFINE_INIT_TP (tp, pd); -#ifdef __NR_clone2 -# define ARCH_CLONE __clone2 -#else -# define ARCH_CLONE __clone -#endif - if (__glibc_unlikely (ARCH_CLONE (&start_thread, STACK_VARIABLES_ARGS, - clone_flags, pd, &pd->tid, tp, &pd->tid) - == -1)) + struct clone_args args = + { + .flags = clone_flags, + .pidfd = (uintptr_t) &pd->tid, + .parent_tid = (uintptr_t) &pd->tid, + .child_tid = (uintptr_t) &pd->tid, + .stack = (uintptr_t) stackaddr, + .stack_size = stacksize, + .tls = (uintptr_t) tp, + }; + int ret = __clone_internal (&args, &start_thread, pd); + if (__glibc_unlikely (ret == -1)) return errno; /* It's started now, so if we fail below, we'll have to let it clean itself @@ -576,7 +581,8 @@ int __pthread_create_2_1 (pthread_t *newthread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg) { - STACK_VARIABLES; + void *stackaddr = NULL; + size_t stacksize = 0; /* Avoid a data race in the multi-threaded case, and call the deferred initialization only once. */ @@ -600,7 +606,7 @@ __pthread_create_2_1 (pthread_t *newthread, const pthread_attr_t *attr, } struct pthread *pd = NULL; - int err = ALLOCATE_STACK (iattr, &pd); + int err = allocate_stack (iattr, &pd, &stackaddr, &stacksize); int retval = 0; if (__glibc_unlikely (err != 0)) @@ -744,8 +750,8 @@ __pthread_create_2_1 (pthread_t *newthread, const pthread_attr_t *attr, /* We always create the thread stopped at startup so we can notify the debugger. */ - retval = create_thread (pd, iattr, &stopped_start, - STACK_VARIABLES_ARGS, &thread_ran); + retval = create_thread (pd, iattr, &stopped_start, stackaddr, + stacksize, &thread_ran); if (retval == 0) { /* We retain ownership of PD until (a) (see CONCURRENCY NOTES @@ -776,8 +782,8 @@ __pthread_create_2_1 (pthread_t *newthread, const pthread_attr_t *attr, } } else - retval = create_thread (pd, iattr, &stopped_start, - STACK_VARIABLES_ARGS, &thread_ran); + retval = create_thread (pd, iattr, &stopped_start, stackaddr, + stacksize, &thread_ran); /* Return to the previous signal mask, after creating the new thread. */ |