server: Implement process control using Mach primitives for Mac OS.
With help from Ken Thomases.
This commit is contained in:
Alexandre Julliard
parent
150b5dcaef
commit
c273498ef4
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@ -919,6 +919,49 @@ static void create_config_dir(void)
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}
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#ifdef __APPLE__
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#include <mach/mach.h>
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#include <mach/mach_error.h>
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#include <servers/bootstrap.h>
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/* send our task port to the server */
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static void send_server_task_port(void)
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{
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mach_port_t bootstrap_port, wineserver_port;
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kern_return_t kret;
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struct {
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mach_msg_header_t header;
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mach_msg_body_t body;
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mach_msg_port_descriptor_t task_port;
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} msg;
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if (task_get_bootstrap_port(mach_task_self(), &bootstrap_port) != KERN_SUCCESS) return;
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kret = bootstrap_look_up(bootstrap_port, (char*)wine_get_server_dir(), &wineserver_port);
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if (kret != KERN_SUCCESS)
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fatal_error( "cannot find the server port: 0x%08x\n", kret );
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mach_port_deallocate(mach_task_self(), bootstrap_port);
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msg.header.msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND, 0) | MACH_MSGH_BITS_COMPLEX;
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msg.header.msgh_size = sizeof(msg);
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msg.header.msgh_remote_port = wineserver_port;
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msg.header.msgh_local_port = MACH_PORT_NULL;
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msg.body.msgh_descriptor_count = 1;
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msg.task_port.name = mach_task_self();
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msg.task_port.disposition = MACH_MSG_TYPE_COPY_SEND;
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msg.task_port.type = MACH_MSG_PORT_DESCRIPTOR;
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kret = mach_msg_send(&msg.header);
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if (kret != KERN_SUCCESS)
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server_protocol_error( "mach_msg_send failed: 0x%08x\n", kret );
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mach_port_deallocate(mach_task_self(), wineserver_port);
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}
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#endif /* __APPLE__ */
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/***********************************************************************
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* server_init_process
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*
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@ -962,6 +1005,10 @@ void server_init_process(void)
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/* receive the first thread request fd on the main socket */
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ntdll_get_thread_data()->request_fd = receive_fd( &dummy_handle );
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#ifdef __APPLE__
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send_server_task_port();
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#endif
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}
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@ -24,6 +24,7 @@ C_SRCS = \
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file.c \
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handle.c \
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hook.c \
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mach.c \
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mailslot.c \
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main.c \
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mapping.c \
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@ -0,0 +1,414 @@
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/*
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* Server-side debugger support using Mach primitives
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*
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* Copyright (C) 1999, 2006 Alexandre Julliard
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* Copyright (C) 2006 Ken Thomases for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include <assert.h>
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#include <errno.h>
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#include <stdio.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "winternl.h"
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#include "file.h"
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#include "process.h"
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#include "thread.h"
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#include "request.h"
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#include "wine/library.h"
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#ifdef USE_MACH
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#include <mach/mach.h>
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#include <mach/mach_error.h>
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#include <mach/thread_act.h>
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#include <servers/bootstrap.h>
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extern int __pthread_kill(mach_port_t, int);
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static mach_port_t server_mach_port;
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void sigchld_callback(void)
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{
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assert(0); /* should never be called on MacOS */
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}
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static void mach_set_error(kern_return_t mach_error)
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{
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switch (mach_error)
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{
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case KERN_SUCCESS: break;
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case KERN_INVALID_ARGUMENT: set_error(STATUS_INVALID_PARAMETER); break;
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case KERN_NO_SPACE: set_error(STATUS_NO_MEMORY); break;
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case KERN_PROTECTION_FAILURE: set_error(STATUS_ACCESS_DENIED); break;
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case KERN_INVALID_ADDRESS: set_error(STATUS_ACCESS_VIOLATION); break;
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default: set_error(STATUS_UNSUCCESSFUL); break;
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}
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}
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static mach_port_t get_process_port( struct process *process )
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{
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return process->trace_data;
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}
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/* initialize the process control mechanism */
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void init_tracing_mechanism(void)
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{
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mach_port_t bp;
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if (task_get_bootstrap_port(mach_task_self(), &bp) != KERN_SUCCESS)
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fatal_error("Can't find bootstrap port\n");
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if (mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &server_mach_port) != KERN_SUCCESS)
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fatal_error("Can't allocate port\n");
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if (mach_port_insert_right( mach_task_self(),
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server_mach_port,
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server_mach_port,
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MACH_MSG_TYPE_MAKE_SEND ) != KERN_SUCCESS)
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fatal_error("Error inserting rights\n");
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if (bootstrap_register(bp, (char*)wine_get_server_dir(), server_mach_port) != KERN_SUCCESS)
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fatal_error("Can't check in server_mach_port\n");
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mach_port_deallocate(mach_task_self(), bp);
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}
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/* initialize the per-process tracing mechanism */
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void init_process_tracing( struct process *process )
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{
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int pid, ret;
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struct
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{
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mach_msg_header_t header;
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mach_msg_body_t body;
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mach_msg_port_descriptor_t task_port;
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mach_msg_trailer_t trailer; /* only present on receive */
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} msg;
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for (;;)
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{
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ret = mach_msg( &msg.header, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0, sizeof(msg),
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server_mach_port, 0, 0 );
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if (ret)
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{
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if (ret != MACH_RCV_TIMED_OUT && debug_level)
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fprintf( stderr, "warning: mach port receive failed with %x\n", ret );
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return;
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}
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/* if anything in the message is invalid, ignore it */
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if (msg.header.msgh_size != offsetof(typeof(msg), trailer)) continue;
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if (msg.body.msgh_descriptor_count != 1) continue;
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if (msg.task_port.type != MACH_MSG_PORT_DESCRIPTOR) continue;
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if (msg.task_port.disposition != MACH_MSG_TYPE_PORT_SEND) continue;
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if (msg.task_port.name == MACH_PORT_NULL) continue;
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if (msg.task_port.name == MACH_PORT_DEAD) continue;
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if (!pid_for_task( msg.task_port.name, &pid ))
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{
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struct thread *thread = get_thread_from_pid( pid );
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if (thread && !thread->process->trace_data)
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thread->process->trace_data = msg.task_port.name;
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else
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mach_port_deallocate( mach_task_self(), msg.task_port.name );
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}
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}
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}
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/* terminate the per-process tracing mechanism */
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void finish_process_tracing( struct process *process )
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{
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if (process->trace_data)
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{
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mach_port_deallocate( mach_task_self(), process->trace_data );
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process->trace_data = 0;
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}
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}
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/* retrieve the thread x86 registers */
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void get_thread_context( struct thread *thread, CONTEXT *context, unsigned int flags )
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{
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struct x86_debug_state32 state;
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mach_msg_type_number_t count = sizeof(state) / sizeof(int);
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mach_msg_type_name_t type;
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mach_port_t port, process_port = get_process_port( thread->process );
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/* all other regs are handled on the client side */
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assert( (flags | CONTEXT_i386) == CONTEXT_DEBUG_REGISTERS );
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if (thread->unix_pid == -1 || !process_port ||
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mach_port_extract_right( process_port, thread->unix_tid,
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MACH_MSG_TYPE_COPY_SEND, &port, &type ))
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{
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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if (!thread_get_state( port, x86_DEBUG_STATE32, (thread_state_t)&state, &count ))
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{
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context->Dr0 = state.dr0;
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context->Dr1 = state.dr1;
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context->Dr2 = state.dr2;
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context->Dr3 = state.dr3;
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context->Dr6 = state.dr6;
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context->Dr7 = state.dr7;
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context->ContextFlags |= CONTEXT_DEBUG_REGISTERS;
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}
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mach_port_deallocate( mach_task_self(), port );
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}
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/* set the thread x86 registers */
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void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned int flags )
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{
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struct x86_debug_state32 state;
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mach_msg_type_number_t count = sizeof(state) / sizeof(int);
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mach_msg_type_name_t type;
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mach_port_t port, process_port = get_process_port( thread->process );
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/* all other regs are handled on the client side */
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assert( (flags | CONTEXT_i386) == CONTEXT_DEBUG_REGISTERS );
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if (thread->unix_pid == -1 || !process_port ||
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mach_port_extract_right( process_port, thread->unix_tid,
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MACH_MSG_TYPE_COPY_SEND, &port, &type ))
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{
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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state.dr0 = context->Dr0;
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state.dr1 = context->Dr1;
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state.dr2 = context->Dr2;
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state.dr3 = context->Dr3;
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state.dr4 = 0;
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state.dr5 = 0;
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state.dr6 = context->Dr6;
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state.dr7 = context->Dr7;
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if (!thread_set_state( port, x86_DEBUG_STATE32, (thread_state_t)&state, count ))
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{
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if (thread->context) /* update the cached values */
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{
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thread->context->Dr0 = context->Dr0;
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thread->context->Dr1 = context->Dr1;
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thread->context->Dr2 = context->Dr2;
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thread->context->Dr3 = context->Dr3;
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thread->context->Dr6 = context->Dr6;
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thread->context->Dr7 = context->Dr7;
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}
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}
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mach_port_deallocate( mach_task_self(), port );
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}
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int send_thread_signal( struct thread *thread, int sig )
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{
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int ret = -1;
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mach_port_t process_port = get_process_port( thread->process );
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if (thread->unix_pid != -1 && process_port)
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{
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mach_msg_type_name_t type;
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mach_port_t port;
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if (!mach_port_extract_right( process_port, thread->unix_tid,
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MACH_MSG_TYPE_COPY_SEND, &port, &type ))
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{
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ret = __pthread_kill( port, sig );
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mach_port_deallocate( mach_task_self(), port );
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}
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else errno = ESRCH;
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if (ret == -1 && errno == ESRCH) /* thread got killed */
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{
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thread->unix_pid = -1;
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thread->unix_tid = -1;
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}
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}
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return (ret != -1);
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}
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/* read data from a process memory space */
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int read_process_memory( struct process *process, const void *ptr, data_size_t size, char *dest )
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{
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kern_return_t ret;
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mach_msg_type_number_t bytes_read;
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vm_offset_t offset, data;
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vm_address_t aligned_address;
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vm_size_t aligned_size;
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unsigned int page_size = get_page_size();
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mach_port_t process_port = get_process_port( process );
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if (!process_port)
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{
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set_error( STATUS_ACCESS_DENIED );
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return 0;
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}
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if ((ret = task_suspend( process_port )) != KERN_SUCCESS)
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{
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mach_set_error( ret );
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return 0;
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}
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offset = (unsigned long)ptr % page_size;
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aligned_address = (vm_address_t)((char *)ptr - offset);
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aligned_size = (size + offset + page_size - 1) / page_size * page_size;
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ret = vm_read( process_port, aligned_address, aligned_size, &data, &bytes_read );
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if (ret != KERN_SUCCESS) mach_set_error( ret );
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else
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{
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memcpy( dest, (char *)data + offset, size );
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vm_deallocate( mach_task_self(), data, bytes_read );
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}
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task_resume( process_port );
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return (ret == KERN_SUCCESS);
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}
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/* write data to a process memory space */
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int write_process_memory( struct process *process, void *ptr, data_size_t size, const char *src )
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{
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kern_return_t ret;
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vm_address_t aligned_address, region_address;
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vm_size_t aligned_size, region_size;
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mach_msg_type_number_t info_size, bytes_read;
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vm_offset_t offset, task_mem = 0;
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struct vm_region_basic_info info;
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mach_port_t dummy;
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unsigned int page_size = get_page_size();
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mach_port_t process_port = get_process_port( process );
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if (!process_port)
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{
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set_error( STATUS_ACCESS_DENIED );
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return 0;
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}
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offset = (unsigned long)ptr % page_size;
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aligned_address = (vm_address_t)((char *)ptr - offset);
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aligned_size = (size + offset + page_size - 1) / page_size * page_size;
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if ((ret = task_suspend( process_port )) != KERN_SUCCESS)
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{
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mach_set_error( ret );
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return 0;
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}
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ret = vm_read( process_port, aligned_address, aligned_size, &task_mem, &bytes_read );
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if (ret != KERN_SUCCESS)
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{
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mach_set_error( ret );
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goto failed;
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}
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region_address = aligned_address;
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info_size = sizeof(info);
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ret = vm_region( process_port, ®ion_address, ®ion_size, VM_REGION_BASIC_INFO,
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(vm_region_info_t)&info, &info_size, &dummy );
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if (ret != KERN_SUCCESS)
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{
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mach_set_error( ret );
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goto failed;
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}
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if (region_address > aligned_address ||
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region_address + region_size < aligned_address + aligned_size)
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{
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/* FIXME: should support multiple regions */
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set_error( ERROR_ACCESS_DENIED );
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goto failed;
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}
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ret = vm_protect( process_port, aligned_address, aligned_size, 0, VM_PROT_READ | VM_PROT_WRITE );
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if (ret != KERN_SUCCESS)
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{
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mach_set_error( ret );
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goto failed;
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}
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/* FIXME: there's an optimization that can be made: check first and last */
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/* pages for writability; read first and last pages; write interior */
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/* pages to task without ever reading&modifying them; if that succeeds, */
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/* modify first and last pages and write them. */
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memcpy( (char*)task_mem + offset, src, size );
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ret = vm_write( process_port, aligned_address, task_mem, bytes_read );
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if (ret != KERN_SUCCESS) mach_set_error( ret );
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else
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{
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vm_deallocate( mach_task_self(), task_mem, bytes_read );
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/* restore protection */
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vm_protect( process_port, aligned_address, aligned_size, 0, info.protection );
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task_resume( process_port );
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return 1;
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}
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failed:
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if (task_mem) vm_deallocate( mach_task_self(), task_mem, bytes_read );
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task_resume( process_port );
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return 0;
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}
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/* retrieve an LDT selector entry */
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void get_selector_entry( struct thread *thread, int entry, unsigned int *base,
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unsigned int *limit, unsigned char *flags )
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{
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const unsigned int total_size = (2 * sizeof(int) + 1) * 8192;
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struct process *process = thread->process;
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unsigned int page_size = get_page_size();
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vm_offset_t data;
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kern_return_t ret;
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mach_msg_type_number_t bytes_read;
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mach_port_t process_port = get_process_port( thread->process );
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if (!process->ldt_copy || !process_port)
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{
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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if (entry >= 8192)
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{
|
||||
set_error( STATUS_INVALID_PARAMETER ); /* FIXME */
|
||||
return;
|
||||
}
|
||||
|
||||
if ((ret = task_suspend( process_port )) == KERN_SUCCESS)
|
||||
{
|
||||
void *ptr = process->ldt_copy;
|
||||
vm_offset_t offset = (unsigned long)ptr % page_size;
|
||||
vm_address_t aligned_address = (vm_address_t)((char *)ptr - offset);
|
||||
vm_size_t aligned_size = (total_size + offset + page_size - 1) / page_size * page_size;
|
||||
|
||||
ret = vm_read( process_port, aligned_address, aligned_size, &data, &bytes_read );
|
||||
if (ret != KERN_SUCCESS) mach_set_error( ret );
|
||||
else
|
||||
{
|
||||
const int *ldt = (const int *)((char *)data + offset);
|
||||
memcpy( base, ldt + entry, sizeof(int) );
|
||||
memcpy( limit, ldt + entry + 8192, sizeof(int) );
|
||||
memcpy( flags, (char *)(ldt + 2 * 8192) + entry, 1 );
|
||||
vm_deallocate( mach_task_self(), data, bytes_read );
|
||||
}
|
||||
task_resume( process_port );
|
||||
}
|
||||
else mach_set_error( ret );
|
||||
}
|
||||
|
||||
#endif /* USE_MACH */
|
||||
|
|
@ -130,6 +130,13 @@ extern struct process_snapshot *process_snap( int *count );
|
|||
extern struct module_snapshot *module_snap( struct process *process, int *count );
|
||||
extern void enum_processes( int (*cb)(struct process*, void*), void *user);
|
||||
|
||||
/* process tracing mechanism to use */
|
||||
#ifdef __APPLE__
|
||||
#define USE_MACH
|
||||
#else
|
||||
#define USE_PTRACE
|
||||
#endif
|
||||
|
||||
extern void init_tracing_mechanism(void);
|
||||
extern void init_process_tracing( struct process *process );
|
||||
extern void finish_process_tracing( struct process *process );
|
||||
|
|
|
|||
|
|
@ -45,6 +45,8 @@
|
|||
#include "process.h"
|
||||
#include "thread.h"
|
||||
|
||||
#ifdef USE_PTRACE
|
||||
|
||||
#ifndef PTRACE_CONT
|
||||
#define PTRACE_CONT PT_CONTINUE
|
||||
#endif
|
||||
|
|
@ -653,3 +655,5 @@ void set_thread_context( struct thread *thread, const CONTEXT *context, unsigned
|
|||
}
|
||||
|
||||
#endif /* linux || __FreeBSD__ */
|
||||
|
||||
#endif /* USE_PTRACE */
|
||||
|
|
|
|||
Loading…
Reference in New Issue