/***********************************************************************
* symbol_get_function_line_status
*
* Find the symbol nearest to a given address.
*/
enum dbg_line_status symbol_get_function_line_status(const ADDRESS64* addr)
{
IMAGEHLP_LINE64 il;
DWORD disp;
ULONG64 disp64, start;
DWORD_PTR lin = (DWORD_PTR)memory_to_linear_addr(addr);
char buffer[sizeof(SYMBOL_INFO) + 256];
SYMBOL_INFO* sym = (SYMBOL_INFO*)buffer;
struct dbg_type func;
il.SizeOfStruct = sizeof(il);
sym->SizeOfStruct = sizeof(SYMBOL_INFO);
sym->MaxNameLen = sizeof(buffer) - sizeof(SYMBOL_INFO);
/* do we have some info for lin address ? */
if (!SymFromAddr(dbg_curr_process->handle, lin, &disp64, sym))
{
ADDRESS64 jumpee;
/* some compilers insert thunks in their code without debug info associated
* take care of this situation
*/
if (be_cpu->is_jump((void*)lin, &jumpee))
return symbol_get_function_line_status(&jumpee);
return dbg_no_line_info;
}
switch (sym->Tag)
{
case SymTagThunk:
/* FIXME: so far dbghelp doesn't return the 16 <=> 32 thunks
* and furthermore, we no longer take care of them !!!
*/
return dbg_in_a_thunk;
case SymTagFunction:
case SymTagPublicSymbol: break;
default:
WINE_FIXME("Unexpected sym-tag 0x%08x\n", sym->Tag);
case SymTagData:
return dbg_no_line_info;
}
/* we should have a function now */
if (!SymGetLineFromAddr64(dbg_curr_process->handle, lin, &disp, &il))
return dbg_no_line_info;
func.module = sym->ModBase;
func.id = sym->info;
if (symbol_get_debug_start(&func, &start) && lin < start)
return dbg_not_on_a_line_number;
if (!sym->Size) sym->Size = 0x100000;
if (il.FileName && il.FileName[0] && disp < sym->Size)
return (disp == 0) ? dbg_on_a_line_number : dbg_not_on_a_line_number;
return dbg_no_line_info;
}
/***********************************************************************
* break_should_continue
*
* Determine if we should continue execution after a SIGTRAP signal when
* executing in the given mode.
*/
BOOL break_should_continue(ADDRESS64* addr, DWORD code)
{
enum dbg_exec_mode mode = dbg_curr_thread->exec_mode;
if (dbg_curr_thread->stopped_xpoint > 0)
{
if (!should_stop(dbg_curr_thread->stopped_xpoint)) return TRUE;
switch (dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].xpoint_type)
{
case be_xpoint_break:
case be_xpoint_watch_exec:
dbg_printf("Stopped on breakpoint %d at ", dbg_curr_thread->stopped_xpoint);
print_address(&dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].addr, TRUE);
dbg_printf("\n");
break;
case be_xpoint_watch_read:
case be_xpoint_watch_write:
dbg_printf("Stopped on watchpoint %d at ", dbg_curr_thread->stopped_xpoint);
print_address(addr, TRUE);
dbg_printf(" new value %s\n",
wine_dbgstr_longlong(dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].w.oldval));
}
return FALSE;
}
/*
* If our mode indicates that we are stepping line numbers,
* get the current function, and figure out if we are exactly
* on a line number or not.
*/
if (mode == dbg_exec_step_over_line || mode == dbg_exec_step_into_line)
{
if (symbol_get_function_line_status(addr) == dbg_on_a_line_number)
dbg_curr_thread->exec_count--;
}
else if (mode == dbg_exec_step_over_insn || mode == dbg_exec_step_into_insn)
dbg_curr_thread->exec_count--;
if (dbg_curr_thread->exec_count > 0 || mode == dbg_exec_finish)
{
/*
* We still need to execute more instructions.
*/
return TRUE;
}
/* no breakpoint, continue if in continuous mode */
return mode == dbg_exec_cont || mode == dbg_exec_finish;
}
/***********************************************************************
* break_restart_execution
*
* Set the bp to the correct state to restart execution
* in the given mode.
*/
void break_restart_execution(int count)
{
ADDRESS64 addr;
enum dbg_line_status status;
enum dbg_exec_mode mode, ret_mode;
ADDRESS64 callee;
void* linear;
memory_get_current_pc(&addr);
linear = memory_to_linear_addr(&addr);
/*
* This is the mode we will be running in after we finish. We would like
* to be able to modify this in certain cases.
*/
ret_mode = mode = dbg_curr_thread->exec_mode;
/* we've stopped on a xpoint (other than step over) */
if (dbg_curr_thread->stopped_xpoint > 0)
{
/*
* If we have set a new value, then save it in the BP number.
*/
if (count != 0 && mode == dbg_exec_cont)
{
dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].skipcount = count;
}
/* If we've stopped on a breakpoint, single step over it (, then run) */
if (is_xpoint_break(dbg_curr_thread->stopped_xpoint))
mode = dbg_exec_step_into_insn;
}
else if (mode == dbg_exec_cont && count > 1)
{
dbg_printf("Not stopped at any breakpoint; argument ignored.\n");
}
if (mode == dbg_exec_finish && be_cpu->is_function_return(linear))
{
mode = ret_mode = dbg_exec_step_into_insn;
}
/*
* See if the function we are stepping into has debug info
* and line numbers. If not, then we step over it instead.
* FIXME - we need to check for things like thunks or trampolines,
* as the actual function may in fact have debug info.
*/
if (be_cpu->is_function_call(linear, &callee))
{
status = symbol_get_function_line_status(&callee);
#if 0
/* FIXME: we need to get the thunk type */
/*
* Anytime we have a trampoline, step over it.
*/
if ((mode == EXEC_STEP_OVER || mode == EXEC_STEPI_OVER)
&& status == dbg_in_a_thunk)
{
WINE_WARN("Not stepping into trampoline at %p (no lines)\n",
memory_to_linear_addr(&callee));
mode = EXEC_STEP_OVER_TRAMPOLINE;
}
#endif
if (mode == dbg_exec_step_into_line && status == dbg_no_line_info)
{
WINE_WARN("Not stepping into function at %p (no lines)\n",
memory_to_linear_addr(&callee));
mode = dbg_exec_step_over_line;
}
}
if (mode == dbg_exec_step_into_line &&
symbol_get_function_line_status(&addr) == dbg_no_line_info)
{
dbg_printf("Single stepping until exit from function,\n"
"which has no line number information.\n");
ret_mode = mode = dbg_exec_finish;
}
switch (mode)
{
case dbg_exec_cont: /* Continuous execution */
be_cpu->single_step(&dbg_context, FALSE);
break_set_xpoints(TRUE);
break;
#if 0
case EXEC_STEP_OVER_TRAMPOLINE:
/*
* This is the means by which we step over our conversion stubs
* in callfrom*.s and callto*.s. We dig the appropriate address
* off the stack, and we set the breakpoint there instead of the
* address just after the call.
*/
be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
be_cpu_addr_stack, &addr);
/* FIXME: we assume stack grows as on an i386 */
addr.Offset += 2 * sizeof(unsigned int);
dbg_read_memory(memory_to_linear_addr(&addr),
&addr.Offset, sizeof(addr.Offset));
dbg_curr_process->bp[0].addr = addr;
dbg_curr_process->bp[0].enabled = TRUE;
dbg_curr_process->bp[0].refcount = 1;
dbg_curr_process->bp[0].skipcount = 0;
dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
dbg_curr_process->bp[0].condition = NULL;
be_cpu->single_step(&dbg_context, FALSE);
break_set_xpoints(TRUE);
break;
#endif
case dbg_exec_finish:
case dbg_exec_step_over_insn: /* Stepping over a call */
case dbg_exec_step_over_line: /* Stepping over a call */
if (be_cpu->is_step_over_insn(linear))
{
be_cpu->disasm_one_insn(&addr, FALSE);
dbg_curr_process->bp[0].addr = addr;
dbg_curr_process->bp[0].enabled = TRUE;
dbg_curr_process->bp[0].refcount = 1;
dbg_curr_process->bp[0].skipcount = 0;
dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
dbg_curr_process->bp[0].condition = NULL;
be_cpu->single_step(&dbg_context, FALSE);
break_set_xpoints(TRUE);
break;
}
/* else fall through to single-stepping */
case dbg_exec_step_into_line: /* Single-stepping a line */
case dbg_exec_step_into_insn: /* Single-stepping an instruction */
be_cpu->single_step(&dbg_context, TRUE);
break;
default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
}
dbg_curr_thread->step_over_bp = dbg_curr_process->bp[0];
dbg_curr_thread->exec_mode = ret_mode;
}