server: Initialize debug registers in new threads if necessary.
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
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9a07d210f1
commit
abe0b1c57b
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@ -904,7 +904,7 @@ static void test_exceptions(void)
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res = pNtGetContextThread( h, &ctx );
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ok( res == STATUS_SUCCESS, "NtGetContextThread failed with %x\n", res );
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ok( ctx.Dr0 == 0, "dr0 %x\n", ctx.Dr0 );
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todo_wine ok( ctx.Dr7 == 0, "dr7 %x\n", ctx.Dr7 );
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ok( ctx.Dr7 == 0, "dr7 %x\n", ctx.Dr7 );
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ctx.Dr0 = (DWORD)code_mem;
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ctx.Dr7 = 3;
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res = pNtSetContextThread( h, &ctx );
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@ -2168,8 +2168,8 @@ static DWORD WINAPI register_check_thread(void *arg)
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ok(!ctx.Dr1, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr1);
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ok(!ctx.Dr2, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr2);
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ok(!ctx.Dr3, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr3);
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todo_wine ok(!ctx.Dr6, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr6);
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todo_wine ok(!ctx.Dr7, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr7);
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ok(!ctx.Dr6, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr6);
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ok(!ctx.Dr7, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr7);
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return 0;
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}
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@ -2238,8 +2238,8 @@ static void test_debug_registers(void)
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ok(!ctx.Dr1, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr1);
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ok(!ctx.Dr2, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr2);
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ok(!ctx.Dr3, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr3);
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todo_wine ok(!ctx.Dr6, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr6);
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todo_wine ok(!ctx.Dr7, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr7);
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ok(!ctx.Dr6, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr6);
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ok(!ctx.Dr7, "expected 0, got %lx\n", (DWORD_PTR)ctx.Dr7);
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ResumeThread(thread);
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WaitForSingleObject(thread, 10000);
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@ -545,6 +545,8 @@ void get_selector_entry( struct thread *thread, int entry, unsigned int *base,
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/* initialize registers in new thread if necessary */
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void init_thread_context( struct thread *thread )
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{
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/* Linux doesn't clear all registers, but hopefully enough to avoid spurious breakpoints */
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thread->system_regs = 0;
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}
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/* retrieve the thread x86 registers */
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@ -558,6 +560,13 @@ void get_thread_context( struct thread *thread, context_t *context, unsigned int
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if (!suspend_for_ptrace( thread )) return;
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if (!(thread->system_regs & SERVER_CTX_DEBUG_REGISTERS))
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{
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/* caller has initialized everything to 0 already, just return */
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context->flags |= SERVER_CTX_DEBUG_REGISTERS;
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goto done;
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}
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for (i = 0; i < 8; i++)
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{
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if (i == 4 || i == 5) continue;
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@ -625,6 +634,7 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
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ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 | 0x55 );
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.i386_regs.dr7 ) == -1) goto error;
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if (thread->context) thread->context->debug.i386_regs.dr7 = context->debug.i386_regs.dr7;
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thread->system_regs |= SERVER_CTX_DEBUG_REGISTERS;
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break;
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case CPU_x86_64:
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 & 0xffff0000 ) == -1) goto error;
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@ -641,6 +651,7 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
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ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 | 0x55 );
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if (ptrace( PTRACE_POKEUSER, pid, DR_OFFSET(7), context->debug.x86_64_regs.dr7 ) == -1) goto error;
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if (thread->context) thread->context->debug.x86_64_regs.dr7 = context->debug.x86_64_regs.dr7;
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thread->system_regs |= SERVER_CTX_DEBUG_REGISTERS;
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break;
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default:
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set_error( STATUS_INVALID_PARAMETER );
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@ -660,6 +671,18 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
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/* initialize registers in new thread if necessary */
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void init_thread_context( struct thread *thread )
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{
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if (!(thread->system_regs & SERVER_CTX_DEBUG_REGISTERS)) return;
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/* FreeBSD doesn't clear the debug registers in new threads */
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if (suspend_for_ptrace( thread ))
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{
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struct dbreg dbregs;
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memset( &dbregs, 0, sizeof(dbregs) );
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ptrace( PTRACE_SETDBREGS, get_ptrace_tid( thread ), (caddr_t)&dbregs, 0 );
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resume_after_ptrace( thread );
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}
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thread->system_regs = 0;
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}
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/* retrieve the thread x86 registers */
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@ -728,9 +751,14 @@ void set_thread_context( struct thread *thread, const context_t *context, unsign
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dbregs.dr6 = context->debug.i386_regs.dr6;
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dbregs.dr7 = context->debug.i386_regs.dr7;
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#endif
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if (ptrace( PTRACE_SETDBREGS, pid, (caddr_t) &dbregs, 0 ) == -1) file_set_error();
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else if (thread->context)
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if (ptrace( PTRACE_SETDBREGS, pid, (caddr_t)&dbregs, 0 ) != -1)
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{
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if (thread->context)
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thread->context->debug.i386_regs = context->debug.i386_regs; /* update the cached values */
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thread->system_regs |= SERVER_CTX_DEBUG_REGISTERS;
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}
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else file_set_error();
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resume_after_ptrace( thread );
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}
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@ -182,6 +182,7 @@ static inline void init_thread_structure( struct thread *thread )
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thread->debug_ctx = NULL;
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thread->debug_event = NULL;
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thread->debug_break = 0;
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thread->system_regs = 0;
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thread->queue = NULL;
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thread->wait = NULL;
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thread->error = 0;
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@ -1245,6 +1246,7 @@ DECL_HANDLER(new_thread)
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if ((thread = create_thread( request_fd, current->process )))
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{
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thread->system_regs = current->system_regs;
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if (req->suspend) thread->suspend++;
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reply->tid = get_thread_id( thread );
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if ((reply->handle = alloc_handle( current->process, thread, req->access, req->attributes )))
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@ -57,6 +57,7 @@ struct thread
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struct debug_ctx *debug_ctx; /* debugger context if this thread is a debugger */
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struct debug_event *debug_event; /* debug event being sent to debugger */
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int debug_break; /* debug breakpoint pending? */
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unsigned int system_regs; /* which system regs have been set */
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struct msg_queue *queue; /* message queue */
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struct thread_wait *wait; /* current wait condition if sleeping */
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struct list system_apc; /* queue of system async procedure calls */
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