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Add support for the sizeof function in Rust 

2016-10-29  Manish Goregaokar  <manish@mozilla.com>

gdb/ChangeLog:
    * rust-exp.y: Parse `sizeof(exp)` as `UNOP_SIZEOF`

gdb/testsuite/ChangeLog:
    * gdb.rust/simple.exp: Add tests for `sizeof(expr)`
This commit is contained in:
Manish Goregaokar 2016-10-29 05:55:58 -07:00
parent b96645f1a1
commit cdf5a07c75
4 changed files with 17 additions and 3 deletions
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4
gdb/ChangeLog
View File

@ -1,3 +1,7 @@
2016-10-29 Manish Goregaokar <manish@mozilla.com>
* rust-exp.y: Parse `sizeof(exp)` as `UNOP_SIZEOF`
2016-10-28 Manish Goregaokar <manish@mozilla.com>
* rust-lang.c (rust_union_is_untagged): Add function to

8
gdb/rust-exp.y
View File

@ -276,6 +276,7 @@ struct rust_op
%token <voidval> KW_EXTERN
%token <voidval> KW_CONST
%token <voidval> KW_FN
%token <voidval> KW_SIZEOF
/* Operator tokens. */
%token <voidval> DOTDOT
@ -371,7 +372,7 @@ expr:
| array_expr
| idx_expr
| range_expr
| unop_expr
| unop_expr /* Must precede call_expr because of ambiguity with sizeof. */
| binop_expr
| paren_expr
| call_expr
@ -577,7 +578,8 @@ unop_expr:
| '&' KW_MUT expr %prec UNARY
{ $$ = ast_unary (UNOP_ADDR, $3); }
| KW_SIZEOF '(' expr ')' %prec UNARY
{ $$ = ast_unary (UNOP_SIZEOF, $3); }
;
binop_expr:
@ -872,6 +874,7 @@ static const struct token_info identifier_tokens[] =
{ "true", KW_TRUE, OP_NULL },
{ "extern", KW_EXTERN, OP_NULL },
{ "fn", KW_FN, OP_NULL },
{ "sizeof", KW_SIZEOF, OP_NULL },
};
/* Operator tokens, sorted longest first. */
@ -2194,6 +2197,7 @@ convert_ast_to_expression (struct parser_state *state,
case UNOP_COMPLEMENT:
case UNOP_IND:
case UNOP_ADDR:
case UNOP_SIZEOF:
convert_ast_to_expression (state, operation->left.op, top);
write_exp_elt_opcode (state, operation->opcode);
break;

4
gdb/testsuite/ChangeLog
View File

@ -1,3 +1,7 @@
2016-10-29 Manish Goregaokar <manish@mozilla.com>
* gdb.rust/simple.exp: Add tests for `sizeof(expr)`
2016-10-27 Manish Goregaokar <manish@mozilla.com>
* gdb.rust/simple.rs: Add test for univariant enums without discriminants

4
gdb/testsuite/gdb.rust/simple.exp
View File

@ -33,6 +33,7 @@ if {![runto ${srcfile}:$line]} {
gdb_test "print a" " = \\(\\)"
gdb_test "ptype a" " = \\(\\)"
gdb_test "print sizeof(a)" " = 0"
gdb_test "print b" " = \\\[\\\]"
gdb_test "ptype b" " = \\\[i32; 0\\\]"
@ -41,6 +42,7 @@ gdb_test "print *(&b as *const \[i32; 0_0\])" " = \\\[\\\]"
gdb_test "print c" " = 99"
gdb_test "ptype c" " = i32"
gdb_test "print sizeof(c)" " = 4"
gdb_test "print c = 87" " = \\(\\)"
gdb_test "print c" " = 87"
@ -127,7 +129,7 @@ gdb_test "print nosuchsymbol" \
gdb_test "print e" " = simple::MoreComplicated::Two\\(73\\)"
gdb_test "print e2" \
" = simple::MoreComplicated::Four\\{this: true, is: 8, a: 109 'm', struct_: 100, variant: 10\\}"
gdb_test "print sizeof(e)" " = 24"
gdb_test_sequence "ptype e" "" {
" = enum simple::MoreComplicated \\{"
" One,"