/* Parse expressions for GDB.
- Copyright (C) 1986-2019 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
Modified from expread.y by the Department of Computer Science at the
State University of New York at Buffalo, 1991.
#include "objfiles.h"
#include "user-regs.h"
#include <algorithm>
-#include "common/gdb_optional.h"
+#include "gdbsupport/gdb_optional.h"
/* Standard set of definitions for printing, dumping, prefixifying,
* and evaluating expressions. */
dump_subexp_body_standard,
evaluate_subexp_standard
};
-\f
-/* Global variables declared in parser-defs.h (and commented there). */
-innermost_block_tracker innermost_block;
-
\f
static unsigned int expressiondebug = 0;
static void
}
-/* Non-zero if an expression parser should set yydebug. */
-int parser_debug;
+/* True if an expression parser should set yydebug. */
+bool parser_debug;
static void
show_parserdebug (struct ui_file *file, int from_tty,
static expression_up parse_exp_in_context (const char **, CORE_ADDR,
const struct block *, int,
int, int *,
- innermost_block_tracker_types,
+ innermost_block_tracker *,
expr_completion_state *);
static void increase_expout_size (struct expr_builder *ps, size_t lenelt);
write_exp_elt (ps, &tmp);
}
-void
+static void
write_exp_elt_msym (struct expr_builder *ps, minimal_symbol *expelt)
{
union exp_element tmp;
struct block_symbol sym;
struct bound_minimal_symbol msym;
struct internalvar *isym = NULL;
+ std::string copy;
/* Handle the tokens $digits; also $ (short for $0) and $$ (short for $$1)
and $$digits (equivalent to $<-digits> if you could type that). */
/* Any names starting with $ are probably debugger internal variables. */
- isym = lookup_only_internalvar (copy_name (str) + 1);
+ copy = copy_name (str);
+ isym = lookup_only_internalvar (copy.c_str () + 1);
if (isym)
{
write_exp_elt_opcode (ps, OP_INTERNALVAR);
/* On some systems, such as HP-UX and hppa-linux, certain system routines
have names beginning with $ or $$. Check for those, first. */
- sym = lookup_symbol (copy_name (str), NULL, VAR_DOMAIN, NULL);
+ sym = lookup_symbol (copy.c_str (), NULL, VAR_DOMAIN, NULL);
if (sym.symbol)
{
write_exp_elt_opcode (ps, OP_VAR_VALUE);
write_exp_elt_opcode (ps, OP_VAR_VALUE);
return;
}
- msym = lookup_bound_minimal_symbol (copy_name (str));
+ msym = lookup_bound_minimal_symbol (copy.c_str ());
if (msym.minsym)
{
write_exp_msymbol (ps, msym);
/* Any other names are assumed to be debugger internal variables. */
write_exp_elt_opcode (ps, OP_INTERNALVAR);
- write_exp_elt_intern (ps, create_internalvar (copy_name (str) + 1));
+ write_exp_elt_intern (ps, create_internalvar (copy.c_str () + 1));
write_exp_elt_opcode (ps, OP_INTERNALVAR);
return;
handle_last:
str.ptr++;
write_exp_string (ps, str);
write_exp_elt_opcode (ps, OP_REGISTER);
- innermost_block.update (ps->expression_context_block,
- INNERMOST_BLOCK_FOR_REGISTERS);
+ ps->block_tracker->update (ps->expression_context_block,
+ INNERMOST_BLOCK_FOR_REGISTERS);
return;
}
so they can share the storage that lexptr is parsing.
When it is necessary to pass a name to a function that expects
a null-terminated string, the substring is copied out
- into a separate block of storage.
-
- N.B. A single buffer is reused on each call. */
+ into a separate block of storage. */
-char *
+std::string
copy_name (struct stoken token)
{
- /* A temporary buffer for identifiers, so we can null-terminate them.
- We allocate this with xrealloc. parse_exp_1 used to allocate with
- alloca, using the size of the whole expression as a conservative
- estimate of the space needed. However, macro expansion can
- introduce names longer than the original expression; there's no
- practical way to know beforehand how large that might be. */
- static char *namecopy;
- static size_t namecopy_size;
-
- /* Make sure there's enough space for the token. */
- if (namecopy_size < token.length + 1)
- {
- namecopy_size = token.length + 1;
- namecopy = (char *) xrealloc (namecopy, token.length + 1);
- }
-
- memcpy (namecopy, token.ptr, token.length);
- namecopy[token.length] = 0;
-
- return namecopy;
+ return std::string (token.ptr, token.length);
}
\f
case UNOP_CHR:
case UNOP_FLOAT:
case UNOP_HIGH:
- case UNOP_KIND:
case UNOP_ODD:
case UNOP_ORD:
case UNOP_TRUNC:
expression_up
parse_exp_1 (const char **stringptr, CORE_ADDR pc, const struct block *block,
- int comma, innermost_block_tracker_types tracker_types)
+ int comma, innermost_block_tracker *tracker)
{
return parse_exp_in_context (stringptr, pc, block, comma, 0, NULL,
- tracker_types, nullptr);
+ tracker, nullptr);
}
/* As for parse_exp_1, except that if VOID_CONTEXT_P, then
parse_exp_in_context (const char **stringptr, CORE_ADDR pc,
const struct block *block,
int comma, int void_context_p, int *out_subexp,
- innermost_block_tracker_types tracker_types,
+ innermost_block_tracker *tracker,
expr_completion_state *cstate)
{
const struct language_defn *lang = NULL;
int subexp;
- innermost_block.reset (tracker_types);
-
if (*stringptr == 0 || **stringptr == 0)
error_no_arg (_("expression to compute"));
const struct block *expression_context_block = block;
CORE_ADDR expression_context_pc = 0;
+ innermost_block_tracker local_tracker;
+ if (tracker == nullptr)
+ tracker = &local_tracker;
+
/* If no context specified, try using the current frame, if any. */
if (!expression_context_block)
expression_context_block = get_selected_block (&expression_context_pc);
struct symbol *func = block_linkage_function (block);
if (func != NULL)
- lang = language_def (SYMBOL_LANGUAGE (func));
+ lang = language_def (func->language ());
if (lang == NULL || lang->la_language == language_unknown)
lang = current_language;
}
parser_state ps (lang, get_current_arch (), expression_context_block,
expression_context_pc, comma, *stringptr,
- cstate != nullptr);
+ cstate != nullptr, tracker);
scoped_restore_current_language lang_saver;
set_language (lang->la_language);
- TRY
+ try
{
lang->la_parser (&ps);
}
- CATCH (except, RETURN_MASK_ALL)
+ catch (const gdb_exception &except)
{
/* If parsing for completion, allow this to succeed; but if no
expression elements have been written, then there's nothing
to do, so fail. */
if (! ps.parse_completion || ps.expout_ptr == 0)
- throw_exception (except);
+ throw;
}
- END_CATCH
/* We have to operate on an "expression *", due to la_post_parser,
which explains this funny-looking double release. */
if (out_subexp)
*out_subexp = subexp;
- lang->la_post_parser (&result, void_context_p, ps.parse_completion);
+ lang->la_post_parser (&result, void_context_p, ps.parse_completion,
+ tracker);
if (expressiondebug)
dump_prefix_expression (result.get (), gdb_stdlog);
to use up all of the contents of STRING. */
expression_up
-parse_expression (const char *string)
+parse_expression (const char *string, innermost_block_tracker *tracker)
{
- expression_up exp = parse_exp_1 (&string, 0, 0, 0);
+ expression_up exp = parse_exp_1 (&string, 0, 0, 0, tracker);
if (*string)
error (_("Junk after end of expression."));
return exp;
int subexp;
expr_completion_state cstate;
- TRY
+ try
{
exp = parse_exp_in_context (&string, 0, 0, 0, 0, &subexp,
- INNERMOST_BLOCK_FOR_SYMBOLS, &cstate);
+ nullptr, &cstate);
}
- CATCH (except, RETURN_MASK_ERROR)
+ catch (const gdb_exception_error &except)
{
/* Nothing, EXP remains NULL. */
}
- END_CATCH
if (exp == NULL)
return NULL;
/* A post-parser that does nothing. */
void
-null_post_parser (expression_up *exp, int void_context_p, int completin)
+null_post_parser (expression_up *exp, int void_context_p, int completin,
+ innermost_block_tracker *tracker)
{
}
return 1;
/* Check objfile where is placed the code touching the variable. */
- objfile = lookup_objfile_from_block (block);
+ objfile = block_objfile (block);
type = SYMBOL_TYPE (symbol);
}
}
}
+void _initialize_parse ();
void
-_initialize_parse (void)
+_initialize_parse ()
{
add_setshow_zuinteger_cmd ("expression", class_maintenance,
&expressiondebug,
projects / deliverable / binutils-gdb.git / blobdiff