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dwarf_parse.c
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dwarf_parse.c
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/* -*- c -*- */
/* Copyright (C) 2014-2016 Alexander Chernov <[email protected]> */
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include "ejudge/dwarf_parse.h"
#include "ejudge/xalloc.h"
#include "ejudge/logger.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <limits.h>
#include <libdwarf-internal/dwarf.h>
#include <libdwarf-internal/libdwarf.h>
typedef struct DieMapEntry
{
Dwarf_Off addr;
TypeInfo *ti;
} DieMapEntry;
typedef struct DieMap
{
int a, u;
DieMapEntry *e;
} DieMap;
static DieMap *
die_map_init(void)
{
DieMap *dm = NULL;
XCALLOC(dm, 1);
return dm;
}
static DieMap *
die_map_destroy(DieMap *dm)
{
if (dm) {
xfree(dm->e);
memset(dm, 0, sizeof(*dm));
xfree(dm);
}
return NULL;
}
static TypeInfo *
die_map_get(DieMap *dm, Dwarf_Off addr)
{
int low = 0, high = dm->u, mid;
while (low < high) {
mid = (low + high) / 2;
if (dm->e[mid].addr == addr) {
return dm->e[mid].ti;
} else if (dm->e[mid].addr < addr) {
low = mid + 1;
} else {
high = mid;
}
}
return NULL;
}
static void
die_map_put(DieMap *dm, Dwarf_Off addr, TypeInfo *ti)
{
int pos = 0;
if (dm->u <= 0) {
pos = 0;
} else if (addr < dm->e[0].addr) {
pos = 0;
} else if (addr > dm->e[dm->u - 1].addr) {
pos = dm->u;
} else {
int low = 0, high = dm->u, mid;
while (low < high) {
if (dm->e[low].addr >= addr) {
pos = low;
break;
}
if (dm->e[high - 1].addr < addr) {
pos = high;
break;
}
mid = (low + high) / 2;
if (dm->e[mid].addr == addr && dm->e[mid].ti == ti) return;
ASSERT(dm->e[mid].addr != addr);
if (dm->e[mid].addr < addr) {
low = mid + 1;
} else {
high = mid;
}
}
ASSERT(low < high);
if (dm->e[pos].addr == addr && dm->e[pos].ti == ti) return;
ASSERT(dm->e[pos].addr != addr);
}
if (dm->u == dm->a) {
if (!(dm->a *= 2)) dm->a = 32;
XREALLOC(dm->e, dm->a);
}
if (pos < dm->u) {
memmove(dm->e + pos + 1, dm->e + pos, (dm->u - pos) * sizeof(dm->e[0]));
}
++dm->u;
memset(dm->e + pos, 0, sizeof(dm->e[0]));
dm->e[pos].addr = addr;
dm->e[pos].ti = ti;
}
static int
s_dwarf_die_CU_offset(
FILE *log_f,
const unsigned char *path,
Dwarf_Die die,
Dwarf_Off *offset);
static int
die_map_get_2(
FILE *log_f,
const unsigned char *path,
DieMap *dm,
Dwarf_Die die,
TypeInfo **pti,
Dwarf_Off *pdie_offset)
{
Dwarf_Off die_offset = 0;
if (s_dwarf_die_CU_offset(log_f, path, die, &die_offset) < 0) return -1;
*pti = die_map_get(dm, die_offset);
if (pdie_offset) *pdie_offset = die_offset;
return *pti != NULL;
}
static int
s_dwarf_tag(
FILE *log_f,
const unsigned char *path,
Dwarf_Die die,
Dwarf_Half *ptag)
{
Dwarf_Error dwe = NULL;
if (dwarf_tag(die, ptag, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_tag failed: %s\n", path,
dwarf_errmsg(dwe));
return -1;
}
return 0;
}
static int
s_dwarf_sibling(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
Dwarf_Die *pdie)
{
Dwarf_Error dwe = NULL;
int res;
if ((res = dwarf_siblingof(dbg, die, pdie, &dwe)) == DW_DLV_OK)
return 1;
if (res == DW_DLV_NO_ENTRY) return 0;
fprintf(log_f, "%s: dwarf_siblingof_b failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
static int
s_dwarf_child(
FILE *log_f,
const unsigned char *path,
Dwarf_Die die,
Dwarf_Die *pdie)
{
Dwarf_Error dwe = NULL;
int res;
if ((res = dwarf_child(die, pdie, &dwe)) == DW_DLV_OK) return 1;
if (res == DW_DLV_NO_ENTRY) return 0;
fprintf(log_f, "%s: dwarf_child failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
static int
s_dwarf_die_CU_offset(
FILE *log_f,
const unsigned char *path,
Dwarf_Die die,
Dwarf_Off *offset)
{
Dwarf_Error dwe = NULL;
if (dwarf_die_CU_offset(die, offset, &dwe) == DW_DLV_OK) return 0;
fprintf(log_f, "%s: dwarf_die_CU_offset failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
static int
s_dwarf_attr(
FILE *log_f,
const unsigned char *path,
Dwarf_Die die,
Dwarf_Half attr,
Dwarf_Attribute *pattr)
{
Dwarf_Error dwe = NULL;
int ret;
if ((ret = dwarf_attr(die, attr, pattr, &dwe)) == DW_DLV_OK) return 1;
if (ret == DW_DLV_NO_ENTRY) return 0;
fprintf(log_f, "%s: dwarf_attr failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
static int
s_dwarf_attr_2(
FILE *log_f,
const unsigned char *path,
Dwarf_Die die,
Dwarf_Half attr,
Dwarf_Attribute *pattr)
{
Dwarf_Error dwe = NULL;
int ret;
if ((ret = dwarf_attr(die, attr, pattr, &dwe)) == DW_DLV_OK) return 1;
if (ret == DW_DLV_NO_ENTRY) {
const char *s = NULL;
dwarf_get_AT_name(attr, &s);
fprintf(log_f, "%s: attribute %s is undefined\n", path, s);
return 0;
}
fprintf(log_f, "%s: dwarf_attr failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
static int
s_dwarf_offdie(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Off offset,
Dwarf_Die *pdie)
{
Dwarf_Error dwe = NULL;
if (dwarf_offdie(dbg, offset, pdie, &dwe) == DW_DLV_OK) return 1;
fprintf(log_f, "%s: dwarf_offdie_b failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
static int
s_dwarf_formstring(
FILE *log_f,
const unsigned char *path,
Dwarf_Attribute attr,
char **pstr)
{
Dwarf_Error dwe = NULL;
Dwarf_Half form_num = 0;
if (dwarf_whatform(attr, &form_num, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_whatform failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
if (form_num != DW_FORM_strp && form_num != DW_FORM_string) {
const char *s = NULL;
dwarf_get_FORM_name(form_num, &s);
fprintf(log_f, "%s: DW_FORM_strp expected, but %s obtained\n",
path, s);
return -1;
}
if (dwarf_formstring(attr, pstr, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formstring failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
return 0;
}
static int
s_dwarf_formudata(
FILE *log_f,
const unsigned char *path,
Dwarf_Attribute attr,
Dwarf_Unsigned *pvalue)
{
Dwarf_Error dwe = NULL;
Dwarf_Half form_num = 0;
if (dwarf_whatform(attr, &form_num, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_whatform failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
if (form_num == DW_FORM_sdata) {
Dwarf_Signed tmp = 0;
if (dwarf_formsdata(attr, pvalue, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formsdata failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
*pvalue = tmp;
return 0;
}
if (form_num == DW_FORM_block1 || form_num == DW_FORM_block2 || form_num == DW_FORM_block4) {
Dwarf_Block *dwb = NULL;
if (dwarf_formblock(attr, &dwb, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formblock failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
if (dwb->bl_len == 1) {
const unsigned char *pp = (const unsigned char*) dwb->bl_data;
*pvalue = *pp;
return 0;
} else if (dwb->bl_len == 2) {
const unsigned short *pp = (const unsigned short*) dwb->bl_data;
*pvalue = *pp;
return 0;
} else if (dwb->bl_len == 3) {
const unsigned char *pp = (const unsigned char *) dwb->bl_data;
// little-endian assumed
*pvalue = pp[0] | (pp[1] << 8) | (pp[2] << 16);
return 0;
} else if (dwb->bl_len == 4) {
const unsigned *pp = (const unsigned*) dwb->bl_data;
*pvalue = *pp;
return 0;
} else {
fprintf(log_f, "%s: invalid block length %d\n", path, (int) dwb->bl_len);
return -1;
}
}
if (form_num != DW_FORM_data1 && form_num != DW_FORM_data2 && form_num != DW_FORM_data4 && form_num != DW_FORM_data8) {
const char *s = NULL;
dwarf_get_FORM_name(form_num, &s);
fprintf(log_f, "%s: DW_FORM_data* expected, but %s obtained\n", path, s);
return -1;
}
if (dwarf_formudata(attr, pvalue, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formudata failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
return 0;
}
static int
s_dwarf_formsdata(
FILE *log_f,
const unsigned char *path,
Dwarf_Attribute attr,
Dwarf_Signed *pvalue)
__attribute__((unused));
static int
s_dwarf_formsdata(
FILE *log_f,
const unsigned char *path,
Dwarf_Attribute attr,
Dwarf_Signed *pvalue)
{
Dwarf_Error dwe = NULL;
Dwarf_Half form_num = 0;
if (dwarf_whatform(attr, &form_num, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_whatform failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
if (form_num != DW_FORM_sdata) {
const char *s = NULL;
dwarf_get_FORM_name(form_num, &s);
fprintf(log_f, "%s: DW_FORM_sdata expected, but %s obtained\n",
path, s);
return -1;
}
if (dwarf_formsdata(attr, pvalue, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formsdata failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
return 0;
}
static int
s_dwarf_formdata(
FILE *log_f,
const unsigned char *path,
Dwarf_Attribute attr,
Dwarf_Signed *pvalue)
{
Dwarf_Error dwe = NULL;
Dwarf_Half form_num = 0;
if (dwarf_whatform(attr, &form_num, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_whatform failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
if (form_num == DW_FORM_sdata) {
if (dwarf_formsdata(attr, pvalue, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formsdata failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
return 0;
}
if (form_num == DW_FORM_block1 || form_num == DW_FORM_block2 || form_num == DW_FORM_block4) {
Dwarf_Block *dwb = NULL;
if (dwarf_formblock(attr, &dwb, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formblock failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
if (dwb->bl_len == 1) {
const unsigned char *pp = (const unsigned char*) dwb->bl_data;
*pvalue = *pp;
return 0;
} else if (dwb->bl_len == 2) {
const unsigned short *pp = (const unsigned short*) dwb->bl_data;
*pvalue = *pp;
return 0;
} else if (dwb->bl_len == 3) {
const unsigned char *pp = (const unsigned char *) dwb->bl_data;
// little-endian assumed
*pvalue = pp[0] | (pp[1] << 8) | (pp[2] << 16);
return 0;
} else if (dwb->bl_len == 4) {
const unsigned *pp = (const unsigned*) dwb->bl_data;
*pvalue = *pp;
return 0;
} else {
fprintf(log_f, "%s: invalid block length %d\n", path, (int) dwb->bl_len);
return -1;
}
}
if (form_num != DW_FORM_data1 && form_num != DW_FORM_data2 && form_num != DW_FORM_data4 && form_num != DW_FORM_data8) {
const char *s = NULL;
dwarf_get_FORM_name(form_num, &s);
fprintf(log_f, "%s: DW_FORM_data* expected, but %s obtained\n", path, s);
return -1;
}
Dwarf_Unsigned tmp = 0;
if (dwarf_formudata(attr, &tmp, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formudata failed: %s\n", path, dwarf_errmsg(dwe));
return -1;
}
*pvalue = tmp;
return 0;
}
static int
s_dwarf_formflag(
FILE *log_f,
const unsigned char *path,
Dwarf_Attribute attr,
Dwarf_Bool *pvalue)
{
Dwarf_Error dwe = NULL;
Dwarf_Half form_num = 0;
if (dwarf_whatform(attr, &form_num, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_whatform failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
if (form_num != DW_FORM_flag_present && form_num != DW_FORM_flag) {
const char *s = NULL;
dwarf_get_FORM_name(form_num, &s);
fprintf(log_f, "%s: DW_FORM_flag expected, but %s obtained\n",
path, s);
return -1;
}
if (dwarf_formflag(attr, pvalue, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formflag failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
return 0;
}
static int
s_dwarf_global_formref(
FILE *log_f,
const unsigned char *path,
Dwarf_Attribute attr,
Dwarf_Off *poff)
{
Dwarf_Error dwe = NULL;
Dwarf_Half form_num = 0;
if (dwarf_whatform(attr, &form_num, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: %d: dwarf_whatform failed: %s\n",
path, __LINE__, dwarf_errmsg(dwe));
return -1;
}
if (form_num != DW_FORM_ref4) {
const char *s = NULL;
dwarf_get_FORM_name(form_num, &s);
fprintf(log_f, "%s: DW_FORM_ref4 expected, but %s obtained\n",
path, s);
return -1;
}
if (dwarf_global_formref(attr, poff, &dwe) != DW_DLV_OK) {
fprintf(log_f, "%s: dwarf_formref failed: %s\n",
path, dwarf_errmsg(dwe));
return -1;
}
return 0;
}
static Dwarf_Off
s_dwarf_dieoffset(Dwarf_Die die)
{
Dwarf_Error dwe = NULL;
Dwarf_Off offset = 0;
if (dwarf_dieoffset(die, &offset, &dwe) != DW_DLV_OK) {
fprintf(stderr, "s_dwarf_dieoffset failed: %s\n", dwarf_errmsg(dwe));
return 0;
}
return offset;
}
static __attribute__((unused)) int
die_get_attrcount(Dwarf_Die die)
{
Dwarf_Attribute *attrs = NULL;
Dwarf_Signed count = 0;
Dwarf_Error err = 0;
if (dwarf_attrlist(die, &attrs, &count, &err) != DW_DLV_OK)
return -1;
// FIXME: should we free attrs?
return count;
}
static void
dump_die(FILE *out, Dwarf_Debug dbg, Dwarf_Die die)
{
Dwarf_Error dwe = NULL;
Dwarf_Off cu_offset = 0;
Dwarf_Off offset = 0;
if (dwarf_die_CU_offset(die, &cu_offset, &dwe) != DW_DLV_OK) goto fail;
if (dwarf_dieoffset(die, &offset, &dwe) != DW_DLV_OK) goto fail;
fprintf(out, "DIE information: CU_offset = %llu (0x%llx), offset = %llu (0x%llx)\n", cu_offset, cu_offset, offset, offset);
Dwarf_Half tag = 0;
const char *tag_name = NULL;
if (dwarf_tag(die, &tag, &dwe) != DW_DLV_OK) goto fail;
dwarf_get_TAG_name(tag, &tag_name);
fprintf(out, " %d (%s)\n", tag, tag_name);
Dwarf_Attribute *attrs = NULL;
Dwarf_Signed attr_count = 0;
int r = dwarf_attrlist(die, &attrs, &attr_count, &dwe);
if (r == DW_DLV_NO_ENTRY) return;
if (r != DW_DLV_OK) goto fail;
for (int i = 0; i < attr_count; ++i) {
Dwarf_Half attr_num = 0;
const char *attr_name = NULL;
if (dwarf_whatattr(attrs[i], &attr_num, &dwe) != DW_DLV_OK) goto fail;
dwarf_get_AT_name(attr_num, &attr_name);
Dwarf_Half form_num = 0;
const char *form_name = NULL;
if (dwarf_whatform(attrs[i], &form_num, &dwe) != DW_DLV_OK) goto fail;
dwarf_get_FORM_name(form_num, &form_name);
if (form_num == DW_FORM_strp || form_num == DW_FORM_string) {
char *value = NULL;
if (dwarf_formstring(attrs[i], &value, &dwe) != DW_DLV_OK) goto fail;
fprintf(out, " %s,%s=<%s>\n", attr_name, form_name, value);
} else if (form_num == DW_FORM_data1 || form_num == DW_FORM_data2 || form_num == DW_FORM_data4 || form_num == DW_FORM_data8) {
Dwarf_Unsigned value = 0;
if (dwarf_formudata(attrs[i], &value, &dwe) != DW_DLV_OK) goto fail;
fprintf(out, " %s,%s=<%llu>\n", attr_name, form_name, value);
} else if (form_num == DW_FORM_sdata) {
Dwarf_Signed value = 0;
if (dwarf_formsdata(attrs[i], &value, &dwe) != DW_DLV_OK) goto fail;
fprintf(out, " %s,%s=<%lld>\n", attr_name, form_name, value);
} else if (form_num == DW_FORM_ref4) {
Dwarf_Off ref_cu_offset = 0;
Dwarf_Off ref_offset = 0;
if (dwarf_formref(attrs[i], &ref_cu_offset, &dwe) != DW_DLV_OK) goto fail;
if (dwarf_global_formref(attrs[i], &ref_offset, &dwe) != DW_DLV_OK) goto fail;
fprintf(out, " %s,%s=%llu, global %llu\n", attr_name, form_name, ref_cu_offset, ref_offset);
} else if (form_num == DW_FORM_flag_present) {
Dwarf_Bool value = 0;
if (dwarf_formflag(attrs[i], &value, &dwe) != DW_DLV_OK) goto fail;
fprintf(out, " %s,%s=%d\n", attr_name, form_name, value);
} else if (form_num == DW_FORM_addr) {
Dwarf_Addr value = 0;
if (dwarf_formaddr(attrs[i], &value, &dwe) != DW_DLV_OK) goto fail;
fprintf(out, " %s,%s=%016llx\n", attr_name, form_name, value);
} else {
fprintf(out, " %s,%s=VALUE UNHANDLED\n", attr_name, form_name);
}
}
for (int i = 0; i < attr_count; ++i)
dwarf_dealloc(dbg, attrs[i], DW_DLA_ATTR);
dwarf_dealloc(dbg, attrs, DW_DLA_LIST);
return;
fail:
fprintf(stderr, "dump_die failed: %s\n", dwarf_errmsg(dwe));
}
typedef struct ParseDieStack
{
struct ParseDieStack *up;
Dwarf_Off offset;
TypeInfo *type_info;
} ParseDieStack;
static ParseDieStack *
die_stack_lookup(ParseDieStack *elem, Dwarf_Off offset)
{
for (; elem; elem = elem->up) {
if (elem->offset == offset)
return elem;
}
return NULL;
}
typedef int (*parse_kind_func_t)(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
int tag,
TypeInfo **p_info,
ParseDieStack *cur,
IdScope *global_scope);
static int
parse_die(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
ParseDieStack *up,
IdScope *global_scope);
static int
parse_type(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
TypeInfo **p_info,
ParseDieStack *cur,
IdScope *global_scope)
{
*p_info = NULL;
Dwarf_Attribute type_attr = NULL;
int r = s_dwarf_attr(log_f, path, die, DW_AT_type, &type_attr);
if (r < 0) return r;
if (!r || !type_attr) return 0;
Dwarf_Off type_off = 0;
if (s_dwarf_global_formref(log_f, path, type_attr, &type_off) < 0) return -1;
Dwarf_Die type_die = NULL;
if (s_dwarf_offdie(log_f, path, dbg, type_off, &type_die) < 0) return -1;
if (parse_die(log_f, path, dbg, type_die, cntx, dm, cur, global_scope) < 0) return -1;
TypeInfo *type_info = NULL;
if (die_map_get_2(log_f, path, dm, type_die, &type_info, NULL) < 0) return -1;
if (!type_info) return 0;
*p_info = type_info;
return 1;
}
static int
parse_base_type_die(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
int tag,
TypeInfo **p_info,
ParseDieStack *cur,
IdScope *global_scope)
{
int retval = -1;
TypeInfo *ti = NULL;
// DW_AT_byte_size, DW_FORM_data1
// DW_AT_encoding, DW_FORM_data1
// DW_AT_name, DW_FORM_strp
Dwarf_Attribute bs_attr = NULL;
Dwarf_Attribute enc_attr = NULL;
Dwarf_Attribute name_attr = NULL;
if (s_dwarf_attr_2(log_f, path, die, DW_AT_byte_size, &bs_attr) <= 0)
goto done;
if (s_dwarf_attr_2(log_f, path, die, DW_AT_encoding, &enc_attr) <= 0)
goto done;
if (s_dwarf_attr_2(log_f, path, die, DW_AT_name, &name_attr) <= 0) {
// this happens on Debian
retval = 0;
goto done;
}
Dwarf_Unsigned bs = 0;
Dwarf_Unsigned enc = 0;
char *name = NULL;
if (s_dwarf_formudata(log_f, path, bs_attr, &bs) < 0) goto done;
if (s_dwarf_formudata(log_f, path, enc_attr, &enc) < 0) goto done;
if (s_dwarf_formstring(log_f, path, name_attr, &name) < 0) goto done;
if (bs == 1 && enc == DW_ATE_boolean) {
ti = tc_get_i1_type(cntx);
} else if (bs == 1 && enc == DW_ATE_signed_char) {
ti = tc_get_i8_type(cntx);
} else if (bs == 1 && enc == DW_ATE_unsigned_char) {
ti = tc_get_u8_type(cntx);
} else if (bs == 2 && enc == DW_ATE_signed) {
ti = tc_get_i16_type(cntx);
} else if (bs == 2 && enc == DW_ATE_unsigned) {
ti = tc_get_u16_type(cntx);
} else if (bs == 4 && enc == DW_ATE_signed) {
ti = tc_get_i32_type(cntx);
} else if (bs == 4 && enc == DW_ATE_unsigned) {
ti = tc_get_u32_type(cntx);
} else if (bs == 8 && enc == DW_ATE_signed) {
ti = tc_get_i64_type(cntx);
} else if (bs == 8 && enc == DW_ATE_unsigned) {
ti = tc_get_u64_type(cntx);
} else if (bs == 16 && enc == DW_ATE_signed) {
// FIXME: create 128-bit type
ti = tc_get_i64_type(cntx);
} else if (bs == 16 && enc == DW_ATE_unsigned) {
// FIXME: create 128-bit type
ti = tc_get_u64_type(cntx);
} else if (bs == 4 && enc == DW_ATE_float) {
ti = tc_get_f32_type(cntx);
} else if (bs == 8 && enc == DW_ATE_float) {
ti = tc_get_f64_type(cntx);
} else if (bs == 12 && enc == DW_ATE_float) {
ti = tc_get_f80_type(cntx);
} else if (bs == 16 && enc == DW_ATE_float) {
// FIXME: f128?
ti = tc_get_f80_type(cntx);
} else if (enc == DW_ATE_complex_float) {
ti = tc_get_f64_type(cntx);
}
const char *ate_name = NULL;
dwarf_get_ATE_name(enc, &ate_name);
if (!ti) {
// unhandled base type
fprintf(log_f, "Note: unhandled base type (%llu,%s,%s)\n",
bs, ate_name, name);
dump_die(log_f, dbg, die);
}
*p_info = ti;
retval = 0;
done:
return retval;
}
static int
parse_pointer_type_die(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
int tag,
TypeInfo **p_info,
ParseDieStack *cur,
IdScope *global_scope)
{
int retval = -1;
TypeInfo *ti = NULL;
// clang does not generate DW_AT_byte_size, which is not used anyway...
// DW_AT_byte_size,DW_FORM_data1
// DW_AT_type,DW_FORM_ref4
Dwarf_Attribute bs_attr = NULL;
Dwarf_Attribute type_attr = NULL;
if (s_dwarf_attr(log_f, path, die, DW_AT_byte_size, &bs_attr) < 0)
goto done;
if (s_dwarf_attr(log_f, path, die, DW_AT_type, &type_attr) < 0)
goto done;
Dwarf_Unsigned bs = 0;
if (bs_attr) {
if (s_dwarf_formudata(log_f, path, bs_attr, &bs) < 0) goto done;
}
if (!type_attr) {
// void*
ti = tc_get_i0_type(cntx);
} else {
Dwarf_Off to = 0;
if (s_dwarf_global_formref(log_f, path, type_attr, &to) < 0) goto done;
Dwarf_Die die2 = NULL;
if (s_dwarf_offdie(log_f, path, dbg, to, &die2) < 0) goto done;
if (parse_die(log_f, path, dbg, die2, cntx, dm, cur, global_scope) < 0) goto done;
if (die_map_get_2(log_f, path, dm, die2, &ti, NULL) < 0) goto done;
// temp fix
if (!ti) ti = tc_get_i0_type(cntx);
}
*p_info = tc_get_ptr_type(cntx, ti);
retval = 0;
done:
return retval;
}
static int
parse_index_range_die(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
TypeInfo *base_info,
TypeInfo **p_info)
{
int retval = -1;
Dwarf_Half tag = 0;
int r;
if (s_dwarf_tag(log_f, path, die, &tag) < 0) goto done;
if (tag != DW_TAG_subrange_type) {
fprintf(log_f, "%s: DW_TAG_subrange_type expected\n", path);
dump_die(log_f, dbg, die);
goto done;
}
Dwarf_Die die2 = NULL;
if ((r = s_dwarf_sibling(log_f, path, dbg, die, &die2)) < 0) goto done;
if (r > 0) {
if (parse_index_range_die(log_f, path, dbg, die2, cntx, base_info, &base_info) < 0) goto done;
}
// FIXME: handle type
Dwarf_Attribute ub_attr = NULL;
if (s_dwarf_attr(log_f, path, die, DW_AT_upper_bound, &ub_attr) < 0) goto done;
if (ub_attr == NULL) {
*p_info = tc_get_open_array_type(cntx, base_info);
} else {
Dwarf_Signed ub = 0;
if (s_dwarf_formdata(log_f, path, ub_attr, &ub) < 0) goto done;
if (ub == INT_MAX) {
ub = 0;
} else if (ub > INT_MAX) {
//fprintf(log_f, "%s: invalid upper bound: %llu\n", path, ub);
//dump_die(log_f, dbg, die);
ub = 0;
}
*p_info = tc_get_array_type(cntx, base_info, tc_get_u32(cntx, ub + 1));
}
retval = 0;
done:
return retval;
}
static int
parse_array_type_die(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
int tag,
TypeInfo **p_info,
ParseDieStack *cur,
IdScope *global_scope)
{
int retval = -1;
TypeInfo *ti = NULL;
Dwarf_Attribute type_attr = NULL;
if (s_dwarf_attr(log_f, path, die, DW_AT_type, &type_attr) < 0)
goto done;
Dwarf_Off to = 0;
if (s_dwarf_global_formref(log_f, path, type_attr, &to) < 0) goto done;
Dwarf_Die die2 = NULL;
if (s_dwarf_offdie(log_f, path, dbg, to, &die2) < 0) goto done;
if (parse_die(log_f, path, dbg, die2, cntx, dm, cur, global_scope) < 0) goto done;
if (die_map_get_2(log_f, path, dm, die2, &ti, NULL) < 0) goto done;
// temp fix
if (!ti) ti = tc_get_i0_type(cntx);
die2 = NULL;
if (s_dwarf_child(log_f, path, die, &die2) < 0) goto done;
if (parse_index_range_die(log_f, path, dbg, die2, cntx, ti, &ti) < 0) goto done;
*p_info = ti;
retval = 0;
done:
return retval;
}
static int
parse_const_type_die(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
int tag,
TypeInfo **p_info,
ParseDieStack *cur,
IdScope *global_scope)
{
int retval = -1;
TypeInfo *ti = NULL;
Dwarf_Attribute type_attr = NULL;
if (s_dwarf_attr(log_f, path, die, DW_AT_type, &type_attr) < 0)
goto done;
if (type_attr == NULL) {
//fprintf(log_f, "DW_TAG_const_type: DW_AT_type missing\n");
//dump_die(log_f, dbg, die);
} else {
Dwarf_Off to = 0;
if (s_dwarf_global_formref(log_f, path, type_attr, &to) < 0) goto done;
Dwarf_Die die2 = NULL;
if (s_dwarf_offdie(log_f, path, dbg, to, &die2) < 0) goto done;
if (parse_die(log_f, path, dbg, die2, cntx, dm, cur, global_scope) < 0) goto done;
if (die_map_get_2(log_f, path, dm, die2, &ti, NULL) < 0) goto done;
// temp fix
}
if (!ti) ti = tc_get_i0_type(cntx);
*p_info = tc_get_const_type(cntx, ti);
retval = 0;
done:
return retval;
}
static int
parse_volatile_type_die(
FILE *log_f,
const unsigned char *path,
Dwarf_Debug dbg,
Dwarf_Die die,
TypeContext *cntx,
DieMap *dm,
int tag,
TypeInfo **p_info,
ParseDieStack *cur,
IdScope *global_scope)
{
int retval = -1;
TypeInfo *ti = NULL;
Dwarf_Attribute type_attr = NULL;
if (s_dwarf_attr(log_f, path, die, DW_AT_type, &type_attr) < 0)
goto done;
if (type_attr == NULL) {
//fprintf(log_f, "DW_TAG_const_type: DW_AT_type missing\n");
//dump_die(log_f, dbg, die);
} else {
Dwarf_Off to = 0;
if (s_dwarf_global_formref(log_f, path, type_attr, &to) < 0) goto done;
Dwarf_Die die2 = NULL;
if (s_dwarf_offdie(log_f, path, dbg, to, &die2) < 0) goto done;
if (parse_die(log_f, path, dbg, die2, cntx, dm, cur, global_scope) < 0) goto done;
if (die_map_get_2(log_f, path, dm, die2, &ti, NULL) < 0) goto done;
// temp fix
}
if (!ti) ti = tc_get_i0_type(cntx);