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dwarves_fprintf.c
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/*
SPDX-License-Identifier: GPL-2.0-only
Copyright (C) 2006 Mandriva Conectiva S.A.
Copyright (C) 2006 Arnaldo Carvalho de Melo <[email protected]>
Copyright (C) 2007..2009 Red Hat Inc.
Copyright (C) 2007..2009 Arnaldo Carvalho de Melo <[email protected]>
*/
#include <dwarf.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <elfutils/version.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "config.h"
#include "dwarves.h"
static const char *dwarf_tag_names[] = {
[DW_TAG_array_type] = "array_type",
[DW_TAG_class_type] = "class_type",
[DW_TAG_entry_point] = "entry_point",
[DW_TAG_enumeration_type] = "enumeration_type",
[DW_TAG_formal_parameter] = "formal_parameter",
[DW_TAG_imported_declaration] = "imported_declaration",
[DW_TAG_label] = "label",
[DW_TAG_lexical_block] = "lexical_block",
[DW_TAG_member] = "member",
[DW_TAG_pointer_type] = "pointer_type",
[DW_TAG_reference_type] = "reference_type",
[DW_TAG_compile_unit] = "compile_unit",
[DW_TAG_string_type] = "string_type",
[DW_TAG_structure_type] = "structure_type",
[DW_TAG_subroutine_type] = "subroutine_type",
[DW_TAG_typedef] = "typedef",
[DW_TAG_union_type] = "union_type",
[DW_TAG_unspecified_parameters] = "unspecified_parameters",
[DW_TAG_variant] = "variant",
[DW_TAG_common_block] = "common_block",
[DW_TAG_common_inclusion] = "common_inclusion",
[DW_TAG_inheritance] = "inheritance",
[DW_TAG_inlined_subroutine] = "inlined_subroutine",
[DW_TAG_module] = "module",
[DW_TAG_ptr_to_member_type] = "ptr_to_member_type",
[DW_TAG_set_type] = "set_type",
[DW_TAG_subrange_type] = "subrange_type",
[DW_TAG_with_stmt] = "with_stmt",
[DW_TAG_access_declaration] = "access_declaration",
[DW_TAG_base_type] = "base_type",
[DW_TAG_catch_block] = "catch_block",
[DW_TAG_const_type] = "const_type",
[DW_TAG_constant] = "constant",
[DW_TAG_enumerator] = "enumerator",
[DW_TAG_file_type] = "file_type",
[DW_TAG_friend] = "friend",
[DW_TAG_namelist] = "namelist",
[DW_TAG_namelist_item] = "namelist_item",
[DW_TAG_packed_type] = "packed_type",
[DW_TAG_subprogram] = "subprogram",
[DW_TAG_template_type_parameter] = "template_type_parameter",
[DW_TAG_template_value_parameter] = "template_value_parameter",
[DW_TAG_thrown_type] = "thrown_type",
[DW_TAG_try_block] = "try_block",
[DW_TAG_variant_part] = "variant_part",
[DW_TAG_variable] = "variable",
[DW_TAG_volatile_type] = "volatile_type",
[DW_TAG_dwarf_procedure] = "dwarf_procedure",
[DW_TAG_restrict_type] = "restrict_type",
[DW_TAG_interface_type] = "interface_type",
[DW_TAG_namespace] = "namespace",
[DW_TAG_imported_module] = "imported_module",
[DW_TAG_unspecified_type] = "unspecified_type",
[DW_TAG_partial_unit] = "partial_unit",
[DW_TAG_imported_unit] = "imported_unit",
[DW_TAG_condition] = "condition",
[DW_TAG_shared_type] = "shared_type",
#ifdef STB_GNU_UNIQUE
[DW_TAG_type_unit] = "type_unit",
[DW_TAG_rvalue_reference_type] = "rvalue_reference_type",
#endif
#if _ELFUTILS_PREREQ(0, 170)
[DW_TAG_coarray_type] = "coarray_type",
[DW_TAG_generic_subrange] = "generic_subrange",
[DW_TAG_dynamic_type] = "dynamic_type",
[DW_TAG_call_site] = "call_site",
[DW_TAG_call_site_parameter] = "call_site_parameter",
[DW_TAG_skeleton_unit] = "skeleton_unit",
[DW_TAG_immutable_type] = "immutable_type",
#endif
[DW_TAG_atomic_type] = "atomic_type",
};
static const char *dwarf_gnu_tag_names[] = {
[DW_TAG_MIPS_loop - DW_TAG_MIPS_loop] = "MIPS_loop",
[DW_TAG_format_label - DW_TAG_MIPS_loop] = "format_label",
[DW_TAG_function_template - DW_TAG_MIPS_loop] = "function_template",
[DW_TAG_class_template - DW_TAG_MIPS_loop] = "class_template",
#ifdef STB_GNU_UNIQUE
[DW_TAG_GNU_BINCL - DW_TAG_MIPS_loop] = "GNU_BINCL",
[DW_TAG_GNU_EINCL - DW_TAG_MIPS_loop] = "GNU_EINCL",
[DW_TAG_GNU_template_template_param - DW_TAG_MIPS_loop] = "GNU_template_template_param",
[DW_TAG_GNU_template_parameter_pack - DW_TAG_MIPS_loop] = "GNU_template_parameter_pack",
[DW_TAG_GNU_formal_parameter_pack - DW_TAG_MIPS_loop] = "GNU_formal_parameter_pack",
#endif
#if _ELFUTILS_PREREQ(0, 153)
[DW_TAG_GNU_call_site - DW_TAG_MIPS_loop] = "GNU_call_site",
[DW_TAG_GNU_call_site_parameter - DW_TAG_MIPS_loop] = "GNU_call_site_parameter",
#endif
};
const char *dwarf_tag_name(const uint32_t tag)
{
if (tag >= DW_TAG_array_type && tag <=
#if _ELFUTILS_PREREQ(0, 170)
DW_TAG_immutable_type
#else
#ifdef STB_GNU_UNIQUE
DW_TAG_rvalue_reference_type
#else
DW_TAG_shared_type
#endif
#endif
)
return dwarf_tag_names[tag];
else if (tag >= DW_TAG_MIPS_loop && tag <=
#if _ELFUTILS_PREREQ(0, 153)
DW_TAG_GNU_call_site_parameter
#elif STB_GNU_UNIQUE
DW_TAG_GNU_formal_parameter_pack
#else
DW_TAG_class_template
#endif
)
return dwarf_gnu_tag_names[tag - DW_TAG_MIPS_loop];
else if (tag == DW_TAG_LLVM_annotation)
return "LLVM_annotation";
return "INVALID";
}
static struct conf_fprintf conf_fprintf__defaults = {
.name_spacing = 23,
.type_spacing = 26,
.emit_stats = 1,
};
const char tabs[] = "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
static size_t union__fprintf(struct type *type, const struct cu *cu,
const struct conf_fprintf *conf, FILE *fp);
/*
* In dwarves_emit.c we can call type__emit() using a locally setup conf_fprintf for which
* the conf->cacheline_size member is not setup and is thus zero, so check for that and
* use the default one for that case.
*
* We really need to make the *_emit*() methods to receive a conf_fprintf pointer for
* which conf->cacheline_size is set, all tools call:
*
* dwarves__resolve_cacheline_size(&conf_load, 0);
*
* To have a conf_load/conf_fprintf with that resolved, but that is not being passed to
* the *_emit*() routines, duh.
*
* Fixing this properly will entail a series of patches, so to fix this problem
* more quickly add this helper.
*/
static uint16_t conf_fprintf__cacheline_size(const struct conf_fprintf *conf)
{
return conf->cacheline_size ?: conf_fprintf__defaults.cacheline_size;
}
size_t tag__nr_cachelines(const struct conf_fprintf *conf, const struct tag *tag, const struct cu *cu)
{
return (tag__size(tag, cu) + conf_fprintf__cacheline_size(conf) - 1) / conf_fprintf__cacheline_size(conf);
}
static const char *tag__accessibility(const struct tag *tag)
{
int a;
switch (tag->tag) {
case DW_TAG_inheritance:
case DW_TAG_member:
a = tag__class_member(tag)->accessibility;
break;
case DW_TAG_subprogram:
a = tag__function(tag)->accessibility;
break;
default:
return NULL;
}
switch (a) {
case DW_ACCESS_public: return "public";
case DW_ACCESS_private: return "private";
case DW_ACCESS_protected: return "protected";
}
return NULL;
}
static size_t __tag__id_not_found_snprintf(char *bf, size_t len, uint32_t id,
const char *fn, int line)
{
return snprintf(bf, len, "<ERROR(%s:%d): %#llx not found!>", fn, line,
(unsigned long long)id);
}
#define tag__id_not_found_snprintf(bf, len, id) \
__tag__id_not_found_snprintf(bf, len, id, __func__, __LINE__)
size_t tag__fprintf_decl_info(const struct tag *tag,
const struct cu *cu, FILE *fp)
{
return fprintf(fp, "/* <%llx> %s:%u */\n", tag__orig_id(tag, cu),
tag__decl_file(tag, cu), tag__decl_line(tag, cu));
return 0;
}
static size_t __class__fprintf(struct class *class, const struct cu *cu,
const struct conf_fprintf *conf, FILE *fp);
static size_t type__fprintf(struct tag *type, const struct cu *cu,
const char *name, const struct conf_fprintf *conf,
FILE *fp);
static size_t array_type__fprintf(const struct tag *tag,
const struct cu *cu, const char *name,
const struct conf_fprintf *conf,
FILE *fp)
{
struct array_type *at = tag__array_type(tag);
struct tag *type = cu__type(cu, tag->type);
size_t printed;
unsigned long long flat_dimensions = 0;
int i;
if (type == NULL)
return tag__id_not_found_fprintf(fp, tag->type);
/* Zero sized arrays? */
if (at->dimensions >= 1 && at->nr_entries[0] == 0 && tag__is_const(type))
type = cu__type(cu, type->type);
printed = type__fprintf(type, cu, name, conf, fp);
for (i = 0; i < at->dimensions; ++i) {
if (conf->flat_arrays || at->is_vector) {
/*
* Seen on the Linux kernel on tun_filter:
*
* __u8 addr[0][ETH_ALEN];
*/
if (at->nr_entries[i] == 0 && i == 0)
break;
if (!flat_dimensions)
flat_dimensions = at->nr_entries[i];
else
flat_dimensions *= at->nr_entries[i];
} else {
bool single_member = conf->last_member && conf->first_member;
if (at->nr_entries[i] != 0 || !conf->last_member || single_member || conf->union_member)
printed += fprintf(fp, "[%u]", at->nr_entries[i]);
else
printed += fprintf(fp, "[]");
}
}
if (at->is_vector) {
type = tag__follow_typedef(tag, cu);
if (flat_dimensions == 0)
flat_dimensions = 1;
printed += fprintf(fp, " __attribute__ ((__vector_size__ (%llu)))",
flat_dimensions * tag__size(type, cu));
} else if (conf->flat_arrays) {
bool single_member = conf->last_member && conf->first_member;
if (flat_dimensions != 0 || !conf->last_member || single_member || conf->union_member)
printed += fprintf(fp, "[%llu]", flat_dimensions);
else
printed += fprintf(fp, "[]");
}
return printed;
}
static size_t string_type__fprintf(const struct tag *tag, const char *name,
const struct conf_fprintf *conf,
FILE *fp)
{
struct string_type *st = tag__string_type(tag);
return fprintf(fp, "string %*s[%u]", conf->type_spacing - 5, name, st->nr_entries);
}
/*
* Here we're printing either:
*
* union bar baz;
*
* I.e. a variable or a class member, or:
*
* union {
* u32 a;
* u16 b;
* } baz;
*
* I.e. a "inline" union, with or without that 'baz' name (unnamed union member),
* or we are expanding unions, i.e. using 'pahole -E/--expand_types'.
*/
static size_t union_decl__fprintf(const struct tag *type, const struct cu *cu, const char *name,
const struct conf_fprintf *conf, FILE *fp)
{
struct type *ctype = tag__type(type);
if (type__name(ctype) != NULL && !conf->expand_types)
return fprintf(fp, "union %-*s %s", conf->type_spacing - 6, type__name(ctype), name ?: "");
struct conf_fprintf tconf = *conf;
tconf.type_spacing -= 8;
tconf.suffix = name;
return union__fprintf(ctype, cu, &tconf, fp);
}
size_t typedef__fprintf(const struct tag *tag, const struct cu *cu,
const struct conf_fprintf *conf, FILE *fp)
{
struct type *type = tag__type(tag);
const struct conf_fprintf *pconf = conf ?: &conf_fprintf__defaults;
const struct tag *tag_type;
const struct tag *ptr_type;
char bf[512];
int is_pointer = 0;
size_t printed = fprintf(fp, "typedef ");
/*
* Check for void (humm, perhaps we should have a fake void tag instance
* to avoid all these checks?
*/
if (tag->type == 0)
return printed + fprintf(fp, "void %s", type__name(type));
next_type:
tag_type = cu__type(cu, tag->type);
if (tag_type == NULL) {
printed += tag__id_not_found_fprintf(fp, tag->type);
return printed + fprintf(fp, " %s", type__name(type));
}
switch (tag_type->tag) {
case DW_TAG_atomic_type:
printed += fprintf(fp, "_Atomic ");
tag = tag_type;
goto next_type;
case DW_TAG_array_type:
return printed + array_type__fprintf(tag_type, cu, type__name(type), pconf, fp);
case DW_TAG_pointer_type:
if (tag_type->type == 0) /* void pointer */
break;
ptr_type = cu__type(cu, tag_type->type);
if (ptr_type == NULL) {
printed += tag__id_not_found_fprintf(fp, tag_type->type);
return printed + fprintf(fp, " *%s", type__name(type));
}
if (ptr_type->tag != DW_TAG_subroutine_type)
break;
tag_type = ptr_type;
is_pointer = 1;
/* Fall thru */
case DW_TAG_subroutine_type:
return printed + ftype__fprintf(tag__ftype(tag_type), cu, type__name(type),
0, is_pointer, 0, true, pconf, fp);
case DW_TAG_class_type:
case DW_TAG_structure_type: {
struct type *ctype = tag__type(tag_type);
if (type__name(ctype) != NULL && !pconf->expand_types)
return printed + fprintf(fp, "struct %s %s", type__name(ctype), type__name(type));
struct conf_fprintf tconf = *pconf;
struct class *cclass = tag__class(tag_type);
if (!tconf.suppress_comments)
class__find_holes(cclass);
tconf.type_spacing -= 8;
tconf.suffix = type__name(type);
return printed + __class__fprintf(cclass, cu, &tconf, fp);
}
case DW_TAG_union_type:
return printed + union_decl__fprintf(tag_type, cu, type__name(type), pconf, fp);
case DW_TAG_enumeration_type: {
struct type *ctype = tag__type(tag_type);
if (type__name(ctype) != NULL)
return printed + fprintf(fp, "enum %s %s", type__name(ctype), type__name(type));
struct conf_fprintf tconf = *pconf;
tconf.suffix = type__name(type);
return printed + enumeration__fprintf(tag_type, &tconf, fp);
}
}
return printed + fprintf(fp, "%s %s",
tag__name(tag_type, cu, bf, sizeof(bf), pconf), type__name(type));
}
static size_t imported_declaration__fprintf(const struct tag *tag,
const struct cu *cu, FILE *fp)
{
char bf[BUFSIZ];
size_t printed = fprintf(fp, "using ::");
const struct tag *decl = cu__function(cu, tag->type);
if (decl == NULL) {
decl = cu__tag(cu, tag->type);
if (decl == NULL)
return printed + tag__id_not_found_fprintf(fp, tag->type);
}
return printed + fprintf(fp, "%s", tag__name(decl, cu, bf, sizeof(bf), NULL));
}
static size_t imported_module__fprintf(const struct tag *tag,
const struct cu *cu, FILE *fp)
{
const struct tag *module = cu__tag(cu, tag->type);
const char *name = "<IMPORTED MODULE ERROR!>";
if (tag__is_namespace(module))
name = namespace__name(tag__namespace(module));
return fprintf(fp, "using namespace %s", name);
}
static int enumeration__max_entry_name_len(struct type *type)
{
if (type->max_tag_name_len)
goto out;
struct enumerator *pos;
type__for_each_enumerator(type, pos) {
int len = strlen(enumerator__name(pos));
if (type->max_tag_name_len < len)
type->max_tag_name_len = len;
}
out:
return type->max_tag_name_len;
}
size_t enumeration__fprintf(const struct tag *tag, const struct conf_fprintf *conf, FILE *fp)
{
struct type *type = tag__type(tag);
struct enumerator *pos;
int max_entry_name_len = enumeration__max_entry_name_len(type);
size_t printed = fprintf(fp, "enum%s%s", type__name(type) ? " " : "", type__name(type) ?: "");
int indent = conf->indent;
if (indent >= (int)sizeof(tabs))
indent = sizeof(tabs) - 1;
if (type->nr_members) {
printed += fprintf(fp, " {\n");
} else {
// enum x86_intercept_stage in the Linux kernel comes just as a forward
// declaration, but then BTF isn't setting the type->declaration to mark
// it as such, do the best we can and assume is a forward decl.
return printed;
}
type__for_each_enumerator(type, pos) {
printed += fprintf(fp, "%.*s\t%-*s = ", indent, tabs,
max_entry_name_len, enumerator__name(pos));
if (conf->hex_fmt)
printed += fprintf(fp, "%#llx", (unsigned long long)pos->value);
else
printed += fprintf(fp, type->is_signed_enum ? "%lld" : "%llu",
(unsigned long long)pos->value);
printed += fprintf(fp, ",\n");
}
printed += fprintf(fp, "%.*s}", indent, tabs);
/*
* XXX: find out how to precisely determine the max size for an
* enumeration, use sizeof(int) for now.
*/
if (type->size / 8 != sizeof(int))
printed += fprintf(fp, " %s", "__attribute__((__packed__))");
if (conf->suffix)
printed += fprintf(fp, " %s", conf->suffix);
return printed;
}
static const char *tag__prefix(const struct cu *cu, const uint32_t tag,
const struct conf_fprintf *conf)
{
switch (tag) {
case DW_TAG_enumeration_type: return "enum ";
case DW_TAG_structure_type:
return (!conf->classes_as_structs &&
cu->language == DW_LANG_C_plus_plus) ? "class " :
"struct ";
case DW_TAG_class_type:
return conf->classes_as_structs ? "struct " : "class ";
case DW_TAG_union_type: return "union ";
case DW_TAG_pointer_type: return " *";
case DW_TAG_reference_type: return " &";
}
return "";
}
static const char *__tag__name(const struct tag *tag, const struct cu *cu,
char *bf, size_t len,
const struct conf_fprintf *conf);
static const char *tag__ptr_name(const struct tag *tag, const struct cu *cu,
char *bf, size_t len, const char *ptr_suffix,
const struct conf_fprintf *conf)
{
if (tag->type == 0) /* No type == void */
snprintf(bf, len, "void %s", ptr_suffix);
else {
const struct tag *type = cu__type(cu, tag->type);
if (type == NULL) {
size_t l = tag__id_not_found_snprintf(bf, len, tag->type);
snprintf(bf + l, len - l, " %s", ptr_suffix);
} else if (!tag__has_type_loop(tag, type, bf, len, NULL)) {
char tmpbf[1024];
const char *const_pointer = "";
if (tag__is_const(type)) {
struct tag *next_type = cu__type(cu, type->type);
if (next_type && tag__is_pointer(next_type)) {
if (!(conf && conf->skip_emitting_modifier))
const_pointer = "const ";
type = next_type;
}
}
snprintf(bf, len, "%s %s%s",
__tag__name(type, cu,
tmpbf, sizeof(tmpbf), conf),
const_pointer,
ptr_suffix);
}
}
return bf;
}
static const char *__tag__name(const struct tag *tag, const struct cu *cu,
char *bf, size_t len,
const struct conf_fprintf *conf)
{
struct tag *type;
const struct conf_fprintf *pconf = conf ?: &conf_fprintf__defaults;
if (tag == NULL)
strncpy(bf, "void", len);
else switch (tag->tag) {
case DW_TAG_base_type: {
const struct base_type *bt = tag__base_type(tag);
const char *name = "nameless base type!";
char bf2[64];
if (bt->name)
name = base_type__name(tag__base_type(tag), bf2, sizeof(bf2));
strncpy(bf, name, len);
}
break;
case DW_TAG_subprogram:
strncpy(bf, function__name(tag__function(tag)), len);
break;
case DW_TAG_pointer_type:
return tag__ptr_name(tag, cu, bf, len, "*", conf);
case DW_TAG_reference_type:
return tag__ptr_name(tag, cu, bf, len, "&", conf);
case DW_TAG_ptr_to_member_type: {
char suffix[512];
type_id_t id = tag__ptr_to_member_type(tag)->containing_type;
type = cu__type(cu, id);
if (type != NULL)
snprintf(suffix, sizeof(suffix), "%s::*", class__name(tag__class(type)));
else {
size_t l = tag__id_not_found_snprintf(suffix,
sizeof(suffix),
id);
snprintf(suffix + l, sizeof(suffix) - l, "::*");
}
return tag__ptr_name(tag, cu, bf, len, suffix, conf);
}
case DW_TAG_volatile_type:
case DW_TAG_const_type:
case DW_TAG_restrict_type:
case DW_TAG_atomic_type:
case DW_TAG_unspecified_type:
type = cu__type(cu, tag->type);
if (type == NULL && tag->type != 0)
tag__id_not_found_snprintf(bf, len, tag->type);
else if (!tag__has_type_loop(tag, type, bf, len, NULL)) {
char tmpbf[128];
const char *prefix = "", *suffix = "",
*type_str = __tag__name(type, cu, tmpbf,
sizeof(tmpbf),
pconf);
if (!pconf->skip_emitting_modifier) {
switch (tag->tag) {
case DW_TAG_volatile_type: prefix = "volatile "; break;
case DW_TAG_const_type: prefix = "const "; break;
case DW_TAG_restrict_type: suffix = " restrict"; break;
case DW_TAG_atomic_type: prefix = "_Atomic "; break;
}
}
snprintf(bf, len, "%s%s%s%s", prefix, type_str, suffix,
pconf->no_parm_names ? "" : " ");
}
break;
case DW_TAG_array_type:
type = cu__type(cu, tag->type);
if (type == NULL)
tag__id_not_found_snprintf(bf, len, tag->type);
else if (!tag__has_type_loop(tag, type, bf, len, NULL))
return __tag__name(type, cu, bf, len, pconf);
break;
case DW_TAG_subroutine_type: {
FILE *bfp = fmemopen(bf, len, "w");
if (bfp != NULL) {
ftype__fprintf(tag__ftype(tag), cu, NULL, 0, 0, 0, true, pconf, bfp);
fclose(bfp);
} else
snprintf(bf, len, "<ERROR(%s): fmemopen failed!>",
__func__);
}
break;
case DW_TAG_member:
snprintf(bf, len, "%s", class_member__name(tag__class_member(tag)));
break;
case DW_TAG_variable:
snprintf(bf, len, "%s", variable__name(tag__variable(tag)));
break;
case DW_TAG_LLVM_annotation:
type = cu__type(cu, tag->type);
if (type == NULL && tag->type != 0)
tag__id_not_found_snprintf(bf, len, tag->type);
else if (!tag__has_type_loop(tag, type, bf, len, NULL))
__tag__name(type, cu, bf, len, conf);
break;
default:
snprintf(bf, len, "%s%s", tag__prefix(cu, tag->tag, pconf),
type__name(tag__type(tag)) ?: "");
break;
}
return bf;
}
const char *tag__name(const struct tag *tag, const struct cu *cu,
char *bf, size_t len, const struct conf_fprintf *conf)
{
int printed = 0;
if (tag == NULL) {
strncpy(bf, "void", len);
return bf;
}
__tag__name(tag, cu, bf + printed, len - printed, conf);
return bf;
}
static const char *variable__prefix(const struct variable *var)
{
switch (variable__scope(var)) {
case VSCOPE_REGISTER:
return "register ";
case VSCOPE_UNKNOWN:
if (var->external && var->declaration)
return "extern ";
break;
case VSCOPE_GLOBAL:
if (!var->external)
return "static ";
break;
case VSCOPE_LOCAL:
case VSCOPE_OPTIMIZED:
break;
}
return NULL;
}
static size_t type__fprintf_stats(struct type *type, const struct cu *cu,
const struct conf_fprintf *conf, FILE *fp)
{
size_t printed = fprintf(fp, "\n%.*s/* size: %d, cachelines: %zd, members: %u",
conf->indent, tabs, type->size,
tag__nr_cachelines(conf, type__tag(type), cu), type->nr_members);
if (type->nr_static_members != 0)
printed += fprintf(fp, ", static members: %u */\n", type->nr_static_members);
else
printed += fprintf(fp, " */\n");
return printed;
}
static type_id_t skip_llvm_annotations(const struct cu *cu, type_id_t id)
{
struct tag *type;
for (;;) {
if (id == 0)
break;
type = cu__type(cu, id);
if (type == NULL || type->tag != DW_TAG_LLVM_annotation || type->type == id)
break;
id = type->type;
}
return id;
}
static size_t type__fprintf(struct tag *type, const struct cu *cu,
const char *name, const struct conf_fprintf *conf,
FILE *fp)
{
char tbf[128];
char namebf[256];
char namebfptr[258];
struct type *ctype;
struct tag *type_expanded = NULL;
struct conf_fprintf tconf = {
.type_spacing = conf->type_spacing,
};
size_t printed = 0;
int expand_types = conf->expand_types;
int suppress_offset_comment = conf->suppress_offset_comment;
if (type == NULL)
goto out_type_not_found;
if (conf->expand_pointers) {
int nr_indirections = 0;
while (tag__is_pointer(type) && type->type != 0) {
struct tag *ttype = cu__type(cu, type->type);
if (ttype == NULL)
goto out_type_not_found;
else {
printed = tag__has_type_loop(type, ttype,
NULL, 0, fp);
if (printed)
return printed;
}
type = ttype;
++nr_indirections;
}
if (nr_indirections > 0) {
const size_t len = strlen(name);
if (len + nr_indirections >= sizeof(namebf))
goto out_type_not_found;
memset(namebf, '*', nr_indirections);
memcpy(namebf + nr_indirections, name, len);
namebf[len + nr_indirections] = '\0';
name = namebf;
}
expand_types = nr_indirections;
if (!suppress_offset_comment)
suppress_offset_comment = !!nr_indirections;
/* Avoid loops */
if (type->recursivity_level != 0)
expand_types = 0;
++type->recursivity_level;
type_expanded = type;
}
if (expand_types) {
int typedef_expanded = 0;
while (tag__is_typedef(type)) {
struct tag *type_type;
int n;
ctype = tag__type(type);
if (typedef_expanded)
printed += fprintf(fp, " -> %s", type__name(ctype));
else {
printed += fprintf(fp, "/* typedef %s", type__name(ctype));
typedef_expanded = 1;
}
type_type = cu__type(cu, type->type);
if (type_type == NULL)
goto out_type_not_found;
n = tag__has_type_loop(type, type_type, NULL, 0, fp);
if (n)
return printed + n;
type = type_type;
}
if (typedef_expanded)
printed += fprintf(fp, " */ ");
}
tconf = *conf;
if (tag__is_struct(type) || tag__is_union(type) ||
tag__is_enumeration(type)) {
inner_struct:
tconf.prefix = NULL;
tconf.suffix = name;
tconf.emit_stats = 0;
tconf.suppress_offset_comment = suppress_offset_comment;
}
const char *modifier;
next_type:
switch (type->tag) {
case DW_TAG_pointer_type: {
type_id_t ptype_id = skip_llvm_annotations(cu, type->type);
if (ptype_id != 0) {
int n;
struct tag *ptype = cu__type(cu, ptype_id);
if (ptype == NULL)
goto out_type_not_found;
n = tag__has_type_loop(type, ptype, NULL, 0, fp);
if (n)
return printed + n;
if (ptype->tag == DW_TAG_subroutine_type) {
printed += ftype__fprintf(tag__ftype(ptype),
cu, name, 0, 1,
tconf.type_spacing, true,
&tconf, fp);
break;
}
if ((tag__is_struct(ptype) || tag__is_union(ptype) ||
tag__is_enumeration(ptype)) && type__name(tag__type(ptype)) == NULL) {
if (name == namebfptr)
goto out_type_not_found;
snprintf(namebfptr, sizeof(namebfptr), "* %.*s", (int)sizeof(namebfptr) - 3, name);
tconf.rel_offset = 1;
name = namebfptr;
type = ptype;
tconf.type_spacing -= 8;
goto inner_struct;
}
}
/* Fall Thru */
}
default:
print_default:
printed += fprintf(fp, "%-*s %s", tconf.type_spacing,
tag__name(type, cu, tbf, sizeof(tbf), &tconf),
name);
break;
case DW_TAG_subroutine_type:
printed += ftype__fprintf(tag__ftype(type), cu, name, 0, 0,
tconf.type_spacing, true, &tconf, fp);
break;
case DW_TAG_atomic_type:
modifier = "_Atomic";
goto print_modifier;
case DW_TAG_const_type:
modifier = "const";
print_modifier: {
if (!conf->skip_emitting_modifier) {
size_t modifier_printed = fprintf(fp, "%s ", modifier);
tconf.type_spacing -= modifier_printed;
printed += modifier_printed;
}
struct tag *ttype = cu__type(cu, type->type);
if (ttype) {
type = ttype;
goto next_type;
}
}
goto print_default;
case DW_TAG_array_type:
printed += array_type__fprintf(type, cu, name, &tconf, fp);
break;
case DW_TAG_string_type:
printed += string_type__fprintf(type, name, &tconf, fp);
break;
case DW_TAG_class_type:
case DW_TAG_structure_type:
ctype = tag__type(type);
if (type__name(ctype) != NULL && !expand_types) {
printed += fprintf(fp, "%s %-*s %s",
(type->tag == DW_TAG_class_type &&
!tconf.classes_as_structs) ? "class" : "struct",
tconf.type_spacing - 7,
type__name(ctype), name ?: "");
} else {
struct class *cclass = tag__class(type);
if (!tconf.suppress_comments)
class__find_holes(cclass);
tconf.type_spacing -= 8;
printed += __class__fprintf(cclass, cu, &tconf, fp);
}
break;
case DW_TAG_union_type:
printed += union_decl__fprintf(type, cu, name, &tconf, fp);
break;
case DW_TAG_enumeration_type:
ctype = tag__type(type);
if (type__name(ctype) != NULL && !expand_types)
printed += fprintf(fp, "enum %-*s %s", tconf.type_spacing - 5, type__name(ctype), name ?: "");
else
printed += enumeration__fprintf(type, &tconf, fp);
break;
case DW_TAG_LLVM_annotation: {
struct tag *ttype = cu__type(cu, type->type);
if (ttype) {
type = ttype;
goto next_type;
}
goto out_type_not_found;
}
}
out:
if (type_expanded)
--type_expanded->recursivity_level;
return printed;
out_type_not_found:
printed = fprintf(fp, "%-*s%s> %s", tconf.type_spacing, "<ERROR",
name == namebfptr ? ": pointer to pointer to inner struct/union/enum?" : "", name);
goto out;
}
static size_t class__fprintf_cacheline_boundary(struct conf_fprintf *conf,
uint32_t offset,
FILE *fp);
static size_t class_member__fprintf(struct class_member *member, bool union_member,
struct tag *type, const struct cu *cu,
struct conf_fprintf *conf, FILE *fp)
{
const int size = member->byte_size;
int member_alignment_printed = 0;
struct conf_fprintf sconf = *conf;
uint32_t offset = member->byte_offset;
size_t printed = 0, printed_cacheline = 0;
const char *cm_name = class_member__name(member),
*name = cm_name;
if (!sconf.rel_offset) {
offset += sconf.base_offset;
if (!union_member)
sconf.base_offset = offset;
}
if (member->bitfield_offset < 0)
offset += member->byte_size;
if (!conf->suppress_comments)
printed_cacheline = class__fprintf_cacheline_boundary(conf, offset, fp);
if (member->tag.tag == DW_TAG_inheritance) {
name = "<ancestor>";
printed += fprintf(fp, "/* ");
}
if (member->is_static)
printed += fprintf(fp, "static ");
/* For struct-like constructs, the name of the member cannot be
* conflated with the name of its type, otherwise __attribute__ are
* printed in the wrong order.
*/
if (tag__is_union(type) || tag__is_struct(type) ||
tag__is_enumeration(type)) {