From: Jacek Caban jacek@codeweavers.com
And discard irrelevant parts in select request. --- server/thread.c | 69 ++++++++++++++++++++++++------------------------- 1 file changed, 34 insertions(+), 35 deletions(-)
diff --git a/server/thread.c b/server/thread.c index 3e35b27f694..e4a58a0ef86 100644 --- a/server/thread.c +++ b/server/thread.c @@ -119,11 +119,10 @@ struct context { struct object obj; /* object header */ unsigned int status; /* status of the context */ - context_t regs[3]; /* context data */ + context_t regs[2]; /* context data */ }; #define CTX_NATIVE 0 /* context for native machine */ #define CTX_WOW 1 /* context if thread is inside WoW */ -#define CTX_PENDING 2 /* pending native context when we don't know whether thread is inside WoW */
/* flags for registers that always need to be set from the server side */ static const unsigned int system_flags = SERVER_CTX_DEBUG_REGISTERS; @@ -292,7 +291,6 @@ static struct context *create_thread_context( struct thread *thread ) context->status = STATUS_PENDING; memset( &context->regs, 0, sizeof(context->regs) ); context->regs[CTX_NATIVE].machine = native_machine; - context->regs[CTX_PENDING].machine = native_machine; return context; }
@@ -1591,8 +1589,6 @@ DECL_HANDLER(select) const context_t *native_context = (const context_t *)((const char *)(result + 1) + req->size); const context_t *wow_context = (ctx_count > 1) ? native_context + 1 : NULL;
- if (current->context && current->context->status != STATUS_PENDING) goto invalid_param; - if (native_context->machine == native_machine) { if (wow_context && wow_context->machine != current->process->machine) goto invalid_param; @@ -1605,7 +1601,14 @@ DECL_HANDLER(select) } else goto invalid_param;
- if (!current->context && !(current->context = create_thread_context( current ))) return; + if ((ctx = current->context)) + { + if (ctx->status != STATUS_PENDING) goto invalid_param; + /* if context was modified in pending state, discard irrelevant changes */ + if (wow_context) ctx->regs[CTX_NATIVE].flags &= ~ctx->regs[CTX_WOW].flags; + else ctx->regs[CTX_WOW].flags = ctx->regs[CTX_WOW].machine = 0; + } + else if (!(current->context = create_thread_context( current ))) return;
ctx = current->context; if (native_context) @@ -1618,13 +1621,6 @@ DECL_HANDLER(select) ctx->regs[CTX_WOW].machine = current->process->machine; copy_context( &ctx->regs[CTX_WOW], wow_context, wow_context->flags & ~ctx->regs[CTX_WOW].flags ); } - else if (ctx->regs[CTX_PENDING].flags) - { - unsigned int flags = ctx->regs[CTX_PENDING].flags & ~ctx->regs[CTX_NATIVE].flags; - copy_context( &ctx->regs[CTX_NATIVE], &ctx->regs[CTX_PENDING], flags ); - ctx->regs[CTX_NATIVE].flags |= flags; - } - ctx->regs[CTX_PENDING].flags = 0; ctx->status = STATUS_SUCCESS; current->suspend_cookie = req->cookie; wake_up( &ctx->obj, 0 ); @@ -1931,36 +1927,39 @@ DECL_HANDLER(set_thread_context) set_error( STATUS_INVALID_PARAMETER ); else if (thread->state != TERMINATED) { - unsigned int ctx = CTX_NATIVE; - const context_t *context = &contexts[CTX_NATIVE]; - unsigned int flags = system_flags & context->flags; - unsigned int native_flags = context->flags & req->native_flags; + unsigned int flags = system_flags & contexts[CTX_NATIVE].flags;
if (thread != current) stop_thread( thread ); - else if (flags) set_thread_context( thread, context, flags ); + else if (flags) set_thread_context( thread, &contexts[CTX_NATIVE], flags ); + if (thread->context && !get_error()) { - if (ctx_count == 2) + /* If context is in a pending state, we don't know if we will use WoW or native + * context, so store both and discard irrevelant one in select request. */ + const int is_pending = thread->context->status == STATUS_PENDING; + unsigned int native_flags = contexts[CTX_NATIVE].flags & req->native_flags; + + if (native_flags) /* some regs are always set from the native context */ { - /* If the target thread doesn't have a WoW context, set native instead. - * If we don't know yet whether we have a WoW context, store native context - * in CTX_PENDING and update when the target thread sends its context(s). */ - if (thread->context->status != STATUS_PENDING) - { - ctx = thread->context->regs[CTX_WOW].machine ? CTX_WOW : CTX_NATIVE; - context = &contexts[ctx]; - } - else ctx = CTX_PENDING; + context_t *ctx = &thread->context->regs[CTX_NATIVE]; + copy_context( ctx, &contexts[CTX_NATIVE], native_flags ); + ctx->flags |= native_flags; + } + if (is_pending || !thread->context->regs[CTX_WOW].machine) + { + context_t *ctx = &thread->context->regs[CTX_NATIVE]; + flags = contexts[CTX_NATIVE].flags & ~native_flags; + copy_context( ctx, &contexts[CTX_NATIVE], flags ); + ctx->flags |= flags; } - flags = context->flags; - if (native_flags && ctx != CTX_NATIVE) /* some regs are always set from the native context */ + if (ctx_count == 2 && (is_pending || thread->context->regs[CTX_WOW].machine)) { - copy_context( &thread->context->regs[CTX_NATIVE], &contexts[CTX_NATIVE], native_flags ); - thread->context->regs[CTX_NATIVE].flags |= native_flags; - flags &= ~native_flags; + context_t *ctx = &thread->context->regs[CTX_WOW]; + flags = contexts[CTX_WOW].flags & ~native_flags; + ctx->machine = contexts[CTX_WOW].machine; + copy_context( ctx, &contexts[CTX_WOW], flags ); + ctx->flags |= flags; } - copy_context( &thread->context->regs[ctx], context, flags ); - thread->context->regs[ctx].flags |= flags; } } else set_error( STATUS_UNSUCCESSFUL );