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server: Try harder to find a suitable thread for read/write_process_memory.

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This commit is contained in:
Alexandre Julliard 2006-07-25 11:41:47 +02:00
parent 4ff4ba394e
commit 7b767fb71c
1 changed files with 17 additions and 12 deletions
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29
server/ptrace.c
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@ -298,18 +298,27 @@ static int write_thread_int( struct thread *thread, int *addr, int data, unsigne
return res;
}
/* return a thread of the process suitable for ptracing */
static struct thread *get_ptrace_thread( struct process *process )
{
struct thread *thread;
LIST_FOR_EACH_ENTRY( thread, &process->thread_list, struct thread, proc_entry )
{
if (thread->unix_pid != -1) return thread;
}
set_error( STATUS_ACCESS_DENIED ); /* process is dead */
return NULL;
}
/* read data from a process memory space */
int read_process_memory( struct process *process, const void *ptr, size_t size, char *dest )
{
struct thread *thread = get_process_first_thread( process );
struct thread *thread = get_ptrace_thread( process );
unsigned int first_offset, last_offset, len;
int data, *addr;
if (!thread) /* process is dead */
{
set_error( STATUS_ACCESS_DENIED );
return 0;
}
if (!thread) return 0;
first_offset = (unsigned long)ptr % sizeof(int);
last_offset = (size + first_offset) % sizeof(int);
@ -366,17 +375,13 @@ static int check_process_write_access( struct thread *thread, int *addr, size_t
/* write data to a process memory space */
int write_process_memory( struct process *process, void *ptr, size_t size, const char *src )
{
struct thread *thread = get_process_first_thread( process );
struct thread *thread = get_ptrace_thread( process );
int ret = 0, data = 0;
size_t len;
int *addr;
unsigned int first_mask, first_offset, last_mask, last_offset;
if (!thread) /* process is dead */
{
set_error( STATUS_ACCESS_DENIED );
return 0;
}
if (!thread) return 0;
/* compute the mask for the first int */
first_mask = ~0;