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a97f6c4fa2
I originally envisioned types as dumb descriptors. This mostly works for C because in C, types are fairly simple. However, even then the drgn_program_member_info() API is awkward. You should be able to look up a member directly from a type, but we need the program for caching purposes. This has also held me back from adding offsetof() or has_member() APIs. Things get even messier with C++. C++ template parameters can be objects (e.g., template <int N>). Such parameters would best be represented by a drgn object, which we need a drgn program for. Static members are a similar case. So, let's reimagine types as being owned by a program. This has a few parts: 1. In libdrgn, simple types are now created by factory functions, drgn_foo_type_create(). 2. To handle their variable length fields, compound types, enum types, and function types are constructed with a "builder" API. 3. Simple types are deduplicated. 4. The Python type factory functions are replaced by methods of the Program class. 5. While we're changing the API, the parameters to pointer_type() and array_type() are reordered to be more logical (and to allow pointer_type() to take a default size of None for the program's default pointer size). 6. Likewise, the type factory methods take qualifiers as a keyword argument only. A big part of this change is updating the tests and splitting up large test cases into smaller ones in a few places. Signed-off-by: Omar Sandoval <osandov@osandov.com>
90 lines
2.1 KiB
C
90 lines
2.1 KiB
C
// Copyright (c) Facebook, Inc. and its affiliates.
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// SPDX-License-Identifier: GPL-3.0+
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#include "internal.h"
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#include "language.h"
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const struct drgn_language drgn_languages[] = {
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[DRGN_LANGUAGE_C] = {
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.name = "C",
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.format_type_name = c_format_type_name,
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.format_type = c_format_type,
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.format_object = c_format_object,
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.find_type = c_find_type,
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.bit_offset = c_bit_offset,
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.integer_literal = c_integer_literal,
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.bool_literal = c_bool_literal,
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.float_literal = c_float_literal,
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.op_cast = c_op_cast,
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.op_bool = c_op_bool,
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.op_cmp = c_op_cmp,
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.op_add = c_op_add,
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.op_sub = c_op_sub,
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.op_mul = c_op_mul,
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.op_div = c_op_div,
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.op_mod = c_op_mod,
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.op_lshift = c_op_lshift,
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.op_rshift = c_op_rshift,
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.op_and = c_op_and,
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.op_or = c_op_or,
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.op_xor = c_op_xor,
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.op_pos = c_op_pos,
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.op_neg = c_op_neg,
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.op_not = c_op_not,
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},
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[DRGN_LANGUAGE_CPP] = {
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.name = "C++",
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.format_type_name = c_format_type_name,
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.format_type = c_format_type,
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.format_object = c_format_object,
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.find_type = c_find_type,
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.bit_offset = c_bit_offset,
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.integer_literal = c_integer_literal,
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.bool_literal = c_bool_literal,
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.float_literal = c_float_literal,
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.op_cast = c_op_cast,
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.op_bool = c_op_bool,
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.op_cmp = c_op_cmp,
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.op_add = c_op_add,
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.op_sub = c_op_sub,
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.op_mul = c_op_mul,
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.op_div = c_op_div,
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.op_mod = c_op_mod,
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.op_lshift = c_op_lshift,
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.op_rshift = c_op_rshift,
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.op_and = c_op_and,
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.op_or = c_op_or,
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.op_xor = c_op_xor,
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.op_pos = c_op_pos,
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.op_neg = c_op_neg,
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.op_not = c_op_not,
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},
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};
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struct drgn_error *drgn_language_from_die(Dwarf_Die *die,
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const struct drgn_language **ret)
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{
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Dwarf_Die cudie;
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if (dwarf_cu_info(die->cu, NULL, NULL, &cudie, NULL, NULL, NULL, NULL))
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return drgn_error_libdw();
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switch (dwarf_srclang(&cudie)) {
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case DW_LANG_C:
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case DW_LANG_C89:
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case DW_LANG_C99:
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case DW_LANG_C11:
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*ret = &drgn_language_c;
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break;
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case DW_LANG_C_plus_plus:
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case DW_LANG_C_plus_plus_03:
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case DW_LANG_C_plus_plus_11:
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case DW_LANG_C_plus_plus_14:
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*ret = &drgn_language_cpp;
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break;
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default:
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*ret = NULL;
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break;
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}
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return NULL;
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}
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