429e1e811b
The debugger on Solaris has been broken since the introduction of
DTrace probe support:
(gdb) start
Temporary breakpoint 1 at 0x80593bc: file simple_main.adb, line 4.
Starting program: /[...]/simple_main
[Thread debugging using libthread_db enabled]
No definition of "mutex_t" in current context.
The problem occurs while trying to parse a probe's argument,
and the exception propagates all the way to the top. This patch
fixes the issue by containing the exception and falling back on
using the "long" builtin type if the argument's type could not
be determined.
Also, the parsing should be done using the C language parser.
gdb/ChangeLog:
* dtrace-probe.c (dtrace_process_dof_probe): Contain any
exception raised while parsing the probe arguments.
Force parsing to be done using the C language parser.
* expression.h (parse_expression_with_language): Declare.
* parse.c (parse_expression_with_language): New function.
156 lines
4.9 KiB
C
156 lines
4.9 KiB
C
/* Definitions for expressions stored in reversed prefix form, for GDB.
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Copyright (C) 1986-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (EXPRESSION_H)
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#define EXPRESSION_H 1
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#include "symtab.h" /* Needed for "struct block" type. */
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#include "doublest.h" /* Needed for DOUBLEST. */
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/* Definitions for saved C expressions. */
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/* An expression is represented as a vector of union exp_element's.
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Each exp_element is an opcode, except that some opcodes cause
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the following exp_element to be treated as a long or double constant
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or as a variable. The opcodes are obeyed, using a stack for temporaries.
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The value is left on the temporary stack at the end. */
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/* When it is necessary to include a string,
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it can occupy as many exp_elements as it needs.
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We find the length of the string using strlen,
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divide to find out how many exp_elements are used up,
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and skip that many. Strings, like numbers, are indicated
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by the preceding opcode. */
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enum exp_opcode
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{
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#define OP(name) name ,
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#include "std-operator.def"
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/* First extension operator. Individual language modules define extra
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operators in *.def include files below with numbers higher than
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OP_EXTENDED0. */
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OP (OP_EXTENDED0)
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/* Language specific operators. */
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#include "ada-operator.def"
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#undef OP
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/* Existing only to swallow the last comma (',') from last .inc file. */
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OP_UNUSED_LAST
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};
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union exp_element
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{
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enum exp_opcode opcode;
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struct symbol *symbol;
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LONGEST longconst;
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DOUBLEST doubleconst;
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gdb_byte decfloatconst[16];
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/* Really sizeof (union exp_element) characters (or less for the last
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element of a string). */
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char string;
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struct type *type;
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struct internalvar *internalvar;
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const struct block *block;
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struct objfile *objfile;
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};
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struct expression
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{
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const struct language_defn *language_defn; /* language it was
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entered in. */
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struct gdbarch *gdbarch; /* architecture it was parsed in. */
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int nelts;
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union exp_element elts[1];
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};
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/* Macros for converting between number of expression elements and bytes
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to store that many expression elements. */
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#define EXP_ELEM_TO_BYTES(elements) \
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((elements) * sizeof (union exp_element))
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#define BYTES_TO_EXP_ELEM(bytes) \
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(((bytes) + sizeof (union exp_element) - 1) / sizeof (union exp_element))
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/* From parse.c */
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extern struct expression *parse_expression (const char *);
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extern struct expression *parse_expression_with_language (const char *string,
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enum language lang);
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extern struct type *parse_expression_for_completion (const char *, char **,
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enum type_code *);
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extern struct expression *parse_exp_1 (const char **, CORE_ADDR pc,
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const struct block *, int);
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/* For use by parsers; set if we want to parse an expression and
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attempt completion. */
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extern int parse_completion;
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/* The innermost context required by the stack and register variables
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we've encountered so far. To use this, set it to NULL, then call
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parse_<whatever>, then look at it. */
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extern const struct block *innermost_block;
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/* From eval.c */
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/* Values of NOSIDE argument to eval_subexp. */
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enum noside
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{
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EVAL_NORMAL,
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EVAL_SKIP, /* Only effect is to increment pos. */
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EVAL_AVOID_SIDE_EFFECTS /* Don't modify any variables or
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call any functions. The value
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returned will have the correct
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type, and will have an
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approximately correct lvalue
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type (inaccuracy: anything that is
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listed as being in a register in
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the function in which it was
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declared will be lval_register).
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Ideally this would not even read
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target memory, but currently it
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does in many situations. */
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};
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extern struct value *evaluate_subexp_standard
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(struct type *, struct expression *, int *, enum noside);
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/* From expprint.c */
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extern void print_expression (struct expression *, struct ui_file *);
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extern char *op_name (struct expression *exp, enum exp_opcode opcode);
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extern char *op_string (enum exp_opcode);
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extern void dump_raw_expression (struct expression *,
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struct ui_file *, char *);
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extern void dump_prefix_expression (struct expression *, struct ui_file *);
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#endif /* !defined (EXPRESSION_H) */
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