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tinycc/tccdbg.c

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/*
* TCC - Tiny C Compiler
*
* Copyright (c) 2001-2004 Fabrice Bellard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "tcc.h"
/* stab debug support */
static const struct {
int type;
int size;
int encoding;
const char *name;
} default_debug[] = {
{ VT_INT, 4, DW_ATE_signed, "int:t1=r1;-2147483648;2147483647;" },
{ VT_BYTE, 1, DW_ATE_signed_char, "char:t2=r2;0;127;" },
#if LONG_SIZE == 4
{ VT_LONG | VT_INT, 4, DW_ATE_signed, "long int:t3=r3;-2147483648;2147483647;" },
#else
{ VT_LLONG | VT_LONG, 8, DW_ATE_signed, "long int:t3=r3;-9223372036854775808;9223372036854775807;" },
#endif
{ VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "unsigned int:t4=r4;0;037777777777;" },
#if LONG_SIZE == 4
{ VT_LONG | VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "long unsigned int:t5=r5;0;037777777777;" },
#else
/* use octal instead of -1 so size_t works (-gstabs+ in gcc) */
{ VT_LLONG | VT_LONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t5=r5;0;01777777777777777777777;" },
#endif
{ VT_QLONG, 16, DW_ATE_signed, "__int128:t6=r6;0;-1;" },
{ VT_QLONG | VT_UNSIGNED, 16, DW_ATE_unsigned, "__int128 unsigned:t7=r7;0;-1;" },
{ VT_LLONG, 8, DW_ATE_signed, "long long int:t8=r8;-9223372036854775808;9223372036854775807;" },
{ VT_LLONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long long unsigned int:t9=r9;0;01777777777777777777777;" },
{ VT_SHORT, 2, DW_ATE_signed, "short int:t10=r10;-32768;32767;" },
{ VT_SHORT | VT_UNSIGNED, 2, DW_ATE_unsigned, "short unsigned int:t11=r11;0;65535;" },
{ VT_BYTE | VT_DEFSIGN, 1, DW_ATE_signed_char, "signed char:t12=r12;-128;127;" },
{ VT_BYTE | VT_DEFSIGN | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t13=r13;0;255;" },
{ VT_FLOAT, 4, DW_ATE_float, "float:t14=r1;4;0;" },
{ VT_DOUBLE, 8, DW_ATE_float, "double:t15=r1;8;0;" },
#ifdef TCC_USING_DOUBLE_FOR_LDOUBLE
{ VT_DOUBLE | VT_LONG, 8, DW_ATE_float, "long double:t16=r1;8;0;" },
#else
{ VT_LDOUBLE, 16, DW_ATE_float, "long double:t16=r1;16;0;" },
#endif
{ -1, -1, -1, "_Float32:t17=r1;4;0;" },
{ -1, -1, -1, "_Float64:t18=r1;8;0;" },
{ -1, -1, -1, "_Float128:t19=r1;16;0;" },
{ -1, -1, -1, "_Float32x:t20=r1;8;0;" },
{ -1, -1, -1, "_Float64x:t21=r1;16;0;" },
{ -1, -1, -1, "_Decimal32:t22=r1;4;0;" },
{ -1, -1, -1, "_Decimal64:t23=r1;8;0;" },
{ -1, -1, -1, "_Decimal128:t24=r1;16;0;" },
/* if default char is unsigned */
{ VT_BYTE | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t25=r25;0;255;" },
/* boolean type */
{ VT_BOOL, 1, DW_ATE_boolean, "bool:t26=r26;0;255;" },
#if LONG_SIZE == 4
{ VT_VOID, 1, DW_ATE_unsigned_char, "void:t27=27" },
#else
/* bitfields use these */
{ VT_LONG | VT_INT, 8, DW_ATE_signed, "long int:t27=r27;-9223372036854775808;9223372036854775807;" },
{ VT_LONG | VT_INT | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t28=r28;0;01777777777777777777777;" },
{ VT_VOID, 1, DW_ATE_unsigned_char, "void:t29=29" },
#endif
};
#define N_DEFAULT_DEBUG (sizeof (default_debug) / sizeof (default_debug[0]))
/* dwarf debug */
#define DWARF_LINE_BASE -5
#define DWARF_LINE_RANGE 14
#define DWARF_OPCODE_BASE 13
#if defined TCC_TARGET_ARM64
#define DWARF_MIN_INSTR_LEN 4
#elif defined TCC_TARGET_ARM
#define DWARF_MIN_INSTR_LEN 2
#else
#define DWARF_MIN_INSTR_LEN 1
#endif
#define DWARF_ABBREV_COMPILE_UNIT 1
#define DWARF_ABBREV_BASE_TYPE 2
#define DWARF_ABBREV_VARIABLE_EXTERNAL 3
#define DWARF_ABBREV_VARIABLE_STATIC 4
#define DWARF_ABBREV_VARIABLE_LOCAL 5
#define DWARF_ABBREV_FORMAL_PARAMETER 6
#define DWARF_ABBREV_POINTER 7
#define DWARF_ABBREV_ARRAY_TYPE 8
#define DWARF_ABBREV_SUBRANGE_TYPE 9
#define DWARF_ABBREV_TYPEDEF 10
#define DWARF_ABBREV_ENUMERATOR_SIGNED 11
#define DWARF_ABBREV_ENUMERATOR_UNSIGNED 12
#define DWARF_ABBREV_ENUMERATION_TYPE 13
#define DWARF_ABBREV_MEMBER 14
#define DWARF_ABBREV_MEMBER_BF 15
#define DWARF_ABBREV_STRUCTURE_TYPE 16
#define DWARF_ABBREV_STRUCTURE_EMPTY_TYPE 17
#define DWARF_ABBREV_UNION_TYPE 18
#define DWARF_ABBREV_UNION_EMPTY_TYPE 19
#define DWARF_ABBREV_SUBPROGRAM_EXTERNAL 20
#define DWARF_ABBREV_SUBPROGRAM_STATIC 21
#define DWARF_ABBREV_LEXICAL_BLOCK 22
#define DWARF_ABBREV_LEXICAL_EMPTY_BLOCK 23
#define DWARF_ABBREV_SUBROUTINE_TYPE 24
#define DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE 25
#define DWARF_ABBREV_FORMAL_PARAMETER2 26
/* all entries should have been generated with dwarf_uleb128 except
has_children. All values are currently below 128 so this currently
works. */
static const unsigned char dwarf_abbrev_init[] = {
DWARF_ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, 1,
DW_AT_producer, DW_FORM_strp,
DW_AT_language, DW_FORM_data1,
DW_AT_name, DW_FORM_line_strp,
DW_AT_comp_dir, DW_FORM_line_strp,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
DW_AT_stmt_list, DW_FORM_sec_offset,
0, 0,
DWARF_ABBREV_BASE_TYPE, DW_TAG_base_type, 0,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_encoding, DW_FORM_data1,
DW_AT_name, DW_FORM_strp,
0, 0,
DWARF_ABBREV_VARIABLE_EXTERNAL, DW_TAG_variable, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_external, DW_FORM_flag,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_VARIABLE_STATIC, DW_TAG_variable, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_VARIABLE_LOCAL, DW_TAG_variable, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_type, DW_FORM_ref4,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_FORMAL_PARAMETER, DW_TAG_formal_parameter, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_type, DW_FORM_ref4,
DW_AT_location, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_POINTER, DW_TAG_pointer_type, 0,
DW_AT_byte_size, DW_FORM_data1,
DW_AT_type, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_ARRAY_TYPE, DW_TAG_array_type, 1,
DW_AT_type, DW_FORM_ref4,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_SUBRANGE_TYPE, DW_TAG_subrange_type, 0,
DW_AT_type, DW_FORM_ref4,
DW_AT_upper_bound, DW_FORM_udata,
0, 0,
DWARF_ABBREV_TYPEDEF, DW_TAG_typedef, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_ENUMERATOR_SIGNED, DW_TAG_enumerator, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_const_value, DW_FORM_sdata,
0, 0,
DWARF_ABBREV_ENUMERATOR_UNSIGNED, DW_TAG_enumerator, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_const_value, DW_FORM_udata,
0, 0,
DWARF_ABBREV_ENUMERATION_TYPE, DW_TAG_enumeration_type, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_encoding, DW_FORM_data1,
DW_AT_byte_size, DW_FORM_data1,
DW_AT_type, DW_FORM_ref4,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_MEMBER, DW_TAG_member, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_data_member_location, DW_FORM_udata,
0, 0,
DWARF_ABBREV_MEMBER_BF, DW_TAG_member, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_bit_size, DW_FORM_udata,
DW_AT_data_bit_offset, DW_FORM_udata,
0, 0,
DWARF_ABBREV_STRUCTURE_TYPE, DW_TAG_structure_type, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_STRUCTURE_EMPTY_TYPE, DW_TAG_structure_type, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
0, 0,
DWARF_ABBREV_UNION_TYPE, DW_TAG_union_type, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_UNION_EMPTY_TYPE, DW_TAG_union_type, 0,
DW_AT_name, DW_FORM_strp,
DW_AT_byte_size, DW_FORM_udata,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
0, 0,
DWARF_ABBREV_SUBPROGRAM_EXTERNAL, DW_TAG_subprogram, 1,
DW_AT_external, DW_FORM_flag,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
DW_AT_sibling, DW_FORM_ref4,
DW_AT_frame_base, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_SUBPROGRAM_STATIC, DW_TAG_subprogram, 1,
DW_AT_name, DW_FORM_strp,
DW_AT_decl_file, DW_FORM_udata,
DW_AT_decl_line, DW_FORM_udata,
DW_AT_type, DW_FORM_ref4,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
DW_AT_sibling, DW_FORM_ref4,
DW_AT_frame_base, DW_FORM_exprloc,
0, 0,
DWARF_ABBREV_LEXICAL_BLOCK, DW_TAG_lexical_block, 1,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
0, 0,
DWARF_ABBREV_LEXICAL_EMPTY_BLOCK, DW_TAG_lexical_block, 0,
DW_AT_low_pc, DW_FORM_addr,
#if PTR_SIZE == 4
DW_AT_high_pc, DW_FORM_data4,
#else
DW_AT_high_pc, DW_FORM_data8,
#endif
0, 0,
DWARF_ABBREV_SUBROUTINE_TYPE, DW_TAG_subroutine_type, 1,
DW_AT_type, DW_FORM_ref4,
DW_AT_sibling, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE, DW_TAG_subroutine_type, 0,
DW_AT_type, DW_FORM_ref4,
0, 0,
DWARF_ABBREV_FORMAL_PARAMETER2, DW_TAG_formal_parameter, 0,
DW_AT_type, DW_FORM_ref4,
0, 0,
0
};
static const unsigned char dwarf_line_opcodes[] = {
0 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1
};
/* ------------------------------------------------------------------------- */
/* debug state */
struct _tccdbg {
int last_line_num, new_file;
int section_sym;
int debug_next_type;
struct _debug_hash {
int debug_type;
Sym *type;
} *debug_hash;
struct _debug_anon_hash {
Sym *type;
int n_debug_type;
int *debug_type;
} *debug_anon_hash;
int n_debug_hash;
int n_debug_anon_hash;
struct _debug_info {
int start;
int end;
int n_sym;
struct debug_sym {
int type;
unsigned long value;
char *str;
Section *sec;
int sym_index;
int info;
int file;
int line;
} *sym;
struct _debug_info *child, *next, *last, *parent;
} *debug_info, *debug_info_root;
struct {
int info;
int abbrev;
int line;
int str;
int line_str;
} dwarf_sym;
struct {
int start;
int dir_size;
char **dir_table;
int filename_size;
struct dwarf_filename_struct {
int dir_entry;
char *name;
} *filename_table;
int line_size;
int line_max_size;
unsigned char *line_data;
int cur_file;
int last_file;
int last_pc;
int last_line;
} dwarf_line;
struct {
int start;
Sym *func;
int line;
int base_type_used[N_DEFAULT_DEBUG];
} dwarf_info;
/* test coverage */
struct {
unsigned long offset;
unsigned long last_file_name;
unsigned long last_func_name;
int ind;
int line;
} tcov_data;
};
#define last_line_num s1->dState->last_line_num
#define new_file s1->dState->new_file
#define section_sym s1->dState->section_sym
#define debug_next_type s1->dState->debug_next_type
#define debug_hash s1->dState->debug_hash
#define debug_anon_hash s1->dState->debug_anon_hash
#define n_debug_hash s1->dState->n_debug_hash
#define n_debug_anon_hash s1->dState->n_debug_anon_hash
#define debug_info s1->dState->debug_info
#define debug_info_root s1->dState->debug_info_root
#define dwarf_sym s1->dState->dwarf_sym
#define dwarf_line s1->dState->dwarf_line
#define dwarf_info s1->dState->dwarf_info
#define tcov_data s1->dState->tcov_data
/* ------------------------------------------------------------------------- */
static void put_stabs(TCCState *s1, const char *str, int type, int other,
int desc, unsigned long value);
ST_FUNC void tcc_debug_new(TCCState *s1)
{
int shf = 0;
if (!s1->dState)
s1->dState = tcc_mallocz(sizeof *s1->dState);
#ifdef CONFIG_TCC_BACKTRACE
/* include stab info with standalone backtrace support */
if (s1->do_debug && s1->output_type == TCC_OUTPUT_MEMORY)
s1->do_backtrace = 1;
if (s1->do_backtrace)
shf = SHF_ALLOC | SHF_WRITE; // SHF_WRITE needed for musl/SELINUX
#endif
if (s1->dwarf) {
s1->dwlo = s1->nb_sections;
dwarf_info_section =
new_section(s1, ".debug_info", SHT_PROGBITS, shf);
dwarf_abbrev_section =
new_section(s1, ".debug_abbrev", SHT_PROGBITS, shf);
dwarf_line_section =
new_section(s1, ".debug_line", SHT_PROGBITS, shf);
dwarf_aranges_section =
new_section(s1, ".debug_aranges", SHT_PROGBITS, shf);
shf |= SHF_MERGE | SHF_STRINGS;
dwarf_str_section =
new_section(s1, ".debug_str", SHT_PROGBITS, shf);
dwarf_str_section->sh_entsize = 1;
dwarf_info_section->sh_addralign =
dwarf_abbrev_section->sh_addralign =
dwarf_line_section->sh_addralign =
dwarf_aranges_section->sh_addralign =
dwarf_str_section->sh_addralign = 1;
if (s1->dwarf >= 5) {
dwarf_line_str_section =
new_section(s1, ".debug_line_str", SHT_PROGBITS, shf);
dwarf_line_str_section->sh_entsize = 1;
dwarf_line_str_section->sh_addralign = 1;
}
s1->dwhi = s1->nb_sections;
}
else
{
stab_section = new_section(s1, ".stab", SHT_PROGBITS, shf);
stab_section->sh_entsize = sizeof(Stab_Sym);
stab_section->sh_addralign = sizeof ((Stab_Sym*)0)->n_value;
stab_section->link = new_section(s1, ".stabstr", SHT_STRTAB, shf);
/* put first entry */
put_stabs(s1, "", 0, 0, 0, 0);
}
}
/* put stab debug information */
static void put_stabs(TCCState *s1, const char *str, int type, int other, int desc,
unsigned long value)
{
Stab_Sym *sym;
unsigned offset;
if (type == N_SLINE
&& (offset = stab_section->data_offset)
&& (sym = (Stab_Sym*)(stab_section->data + offset) - 1)
&& sym->n_type == type
&& sym->n_value == value) {
/* just update line_number in previous entry */
sym->n_desc = desc;
return;
}
sym = section_ptr_add(stab_section, sizeof(Stab_Sym));
if (str) {
sym->n_strx = put_elf_str(stab_section->link, str);
} else {
sym->n_strx = 0;
}
sym->n_type = type;
sym->n_other = other;
sym->n_desc = desc;
sym->n_value = value;
}
static void put_stabs_r(TCCState *s1, const char *str, int type, int other, int desc,
unsigned long value, Section *sec, int sym_index)
{
put_elf_reloc(symtab_section, stab_section,
stab_section->data_offset + 8,
sizeof ((Stab_Sym*)0)->n_value == PTR_SIZE ? R_DATA_PTR : R_DATA_32,
sym_index);
put_stabs(s1, str, type, other, desc, value);
}
static void put_stabn(TCCState *s1, int type, int other, int desc, int value)
{
put_stabs(s1, NULL, type, other, desc, value);
}
/* ------------------------------------------------------------------------- */
#define dwarf_data1(s,data) \
{ unsigned char *p = section_ptr_add((s), 1); *p = (data); }
#define dwarf_data2(s,data) \
write16le(section_ptr_add((s), 2), (data))
#define dwarf_data4(s,data) \
write32le(section_ptr_add((s), 4), (data))
#define dwarf_data8(s,data) \
write64le(section_ptr_add((s), 8), (data))
static int dwarf_get_section_sym(Section *s)
{
TCCState *s1 = s->s1;
return put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
s->sh_num, NULL);
}
static void dwarf_reloc(Section *s, int sym, int rel)
{
TCCState *s1 = s->s1;
put_elf_reloca(symtab_section, s, s->data_offset, rel, sym, 0);
}
static void dwarf_string(Section *s, Section *dw, int sym, const char *str)
{
TCCState *s1 = s->s1;
int offset, len;
char *ptr;
len = strlen(str) + 1;
offset = dw->data_offset;
ptr = section_ptr_add(dw, len);
memmove(ptr, str, len);
put_elf_reloca(symtab_section, s, s->data_offset, R_DATA_32DW, sym,
PTR_SIZE == 4 ? 0 : offset);
dwarf_data4(s, PTR_SIZE == 4 ? offset : 0);
}
static void dwarf_strp(Section *s, const char *str)
{
TCCState *s1 = s->s1;
dwarf_string(s, dwarf_str_section, dwarf_sym.str, str);
}
static void dwarf_line_strp(Section *s, const char *str)
{
TCCState *s1 = s->s1;
dwarf_string(s, dwarf_line_str_section, dwarf_sym.line_str, str);
}
static void dwarf_line_op(TCCState *s1, unsigned char op)
{
if (dwarf_line.line_size >= dwarf_line.line_max_size) {
dwarf_line.line_max_size += 1024;
dwarf_line.line_data =
(unsigned char *)tcc_realloc(dwarf_line.line_data,
dwarf_line.line_max_size);
}
dwarf_line.line_data[dwarf_line.line_size++] = op;
}
static void dwarf_file(TCCState *s1)
{
int i, j;
char *filename;
int index_offset = s1->dwarf < 5;
if (!strcmp(file->filename, "<command line>")) {
dwarf_line.cur_file = 1;
return;
}
filename = strrchr(file->filename, '/');
if (filename == NULL) {
for (i = 1; i < dwarf_line.filename_size; i++)
if (dwarf_line.filename_table[i].dir_entry == 0 &&
strcmp(dwarf_line.filename_table[i].name,
file->filename) == 0) {
dwarf_line.cur_file = i + index_offset;
return;
}
i = -index_offset;
filename = file->filename;
}
else {
char *undo = filename;
char *dir = file->filename;
*filename++ = '\0';
for (i = 0; i < dwarf_line.dir_size; i++)
if (strcmp(dwarf_line.dir_table[i], dir) == 0) {
for (j = 1; j < dwarf_line.filename_size; j++)
if (dwarf_line.filename_table[j].dir_entry - index_offset
== i &&
strcmp(dwarf_line.filename_table[j].name,
filename) == 0) {
*undo = '/';
dwarf_line.cur_file = j + index_offset;
return;
}
break;
}
if (i == dwarf_line.dir_size) {
dwarf_line.dir_size++;
dwarf_line.dir_table =
(char **) tcc_realloc(dwarf_line.dir_table,
dwarf_line.dir_size *
sizeof (char *));
dwarf_line.dir_table[i] = tcc_strdup(dir);
}
*undo = '/';
}
dwarf_line.filename_table =
(struct dwarf_filename_struct *)
tcc_realloc(dwarf_line.filename_table,
(dwarf_line.filename_size + 1) *
sizeof (struct dwarf_filename_struct));
dwarf_line.filename_table[dwarf_line.filename_size].dir_entry =
i + index_offset;
dwarf_line.filename_table[dwarf_line.filename_size].name =
tcc_strdup(filename);
dwarf_line.cur_file = dwarf_line.filename_size++ + index_offset;
return;
}
#if 0
static int dwarf_uleb128_size (unsigned long long value)
{
int size = 0;
do {
value >>= 7;
size++;
} while (value != 0);
return size;
}
#endif
static int dwarf_sleb128_size (long long value)
{
int size = 0;
long long end = value >> 63;
unsigned char last = end & 0x40;
unsigned char byte;
do {
byte = value & 0x7f;
value >>= 7;
size++;
} while (value != end || (byte & 0x40) != last);
return size;
}
static void dwarf_uleb128 (Section *s, unsigned long long value)
{
do {
unsigned char byte = value & 0x7f;
value >>= 7;
dwarf_data1(s, byte | (value ? 0x80 : 0));
} while (value != 0);
}
static void dwarf_sleb128 (Section *s, long long value)
{
int more;
long long end = value >> 63;
unsigned char last = end & 0x40;
do {
unsigned char byte = value & 0x7f;
value >>= 7;
more = value != end || (byte & 0x40) != last;
dwarf_data1(s, byte | (0x80 * more));
} while (more);
}
static void dwarf_uleb128_op (TCCState *s1, unsigned long long value)
{
do {
unsigned char byte = value & 0x7f;
value >>= 7;
dwarf_line_op(s1, byte | (value ? 0x80 : 0));
} while (value != 0);
}
static void dwarf_sleb128_op (TCCState *s1, long long value)
{
int more;
long long end = value >> 63;
unsigned char last = end & 0x40;
do {
unsigned char byte = value & 0x7f;
value >>= 7;
more = value != end || (byte & 0x40) != last;
dwarf_line_op(s1, byte | (0x80 * more));
} while (more);
}
/* start of translation unit info */
ST_FUNC void tcc_debug_start(TCCState *s1)
{
int i;
char buf[512];
char *filename;
/* we might currently #include the <command-line> */
filename = file->prev ? file->prev->filename : file->filename;
/* an elf symbol of type STT_FILE must be put so that STB_LOCAL
symbols can be safely used */
put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
SHN_ABS, filename);
if (s1->do_debug) {
new_file = last_line_num = 0;
debug_next_type = N_DEFAULT_DEBUG;
debug_hash = NULL;
debug_anon_hash = NULL;
n_debug_hash = 0;
n_debug_anon_hash = 0;
getcwd(buf, sizeof(buf));
#ifdef _WIN32
normalize_slashes(buf);
#endif
if (s1->dwarf) {
int start_abbrev;
unsigned char *ptr;
char *undo;
/* dwarf_abbrev */
start_abbrev = dwarf_abbrev_section->data_offset;
ptr = section_ptr_add(dwarf_abbrev_section, sizeof(dwarf_abbrev_init));
memcpy(ptr, dwarf_abbrev_init, sizeof(dwarf_abbrev_init));
if (s1->dwarf < 5) {
while (*ptr) {
ptr += 3;
while (*ptr) {
if (ptr[1] == DW_FORM_line_strp)
ptr[1] = DW_FORM_strp;
if (s1->dwarf < 4) {
/* These are compatable for DW_TAG_compile_unit
DW_AT_stmt_list. */
if (ptr[1] == DW_FORM_sec_offset)
ptr[1] = DW_FORM_data4;
/* This code uses only size < 0x80 so these are
compatible. */
if (ptr[1] == DW_FORM_exprloc)
ptr[1] = DW_FORM_block1;
}
ptr += 2;
}
ptr += 2;
}
}
dwarf_sym.info = dwarf_get_section_sym(dwarf_info_section);
dwarf_sym.abbrev = dwarf_get_section_sym(dwarf_abbrev_section);
dwarf_sym.line = dwarf_get_section_sym(dwarf_line_section);
dwarf_sym.str = dwarf_get_section_sym(dwarf_str_section);
if (tcc_state->dwarf >= 5)
dwarf_sym.line_str = dwarf_get_section_sym(dwarf_line_str_section);
else {
dwarf_line_str_section = dwarf_str_section;
dwarf_sym.line_str = dwarf_sym.str;
}
section_sym = dwarf_get_section_sym(text_section);
/* dwarf_info */
dwarf_info.start = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0); // size
dwarf_data2(dwarf_info_section, s1->dwarf); // version
if (s1->dwarf >= 5) {
dwarf_data1(dwarf_info_section, DW_UT_compile); // unit type
dwarf_data1(dwarf_info_section, PTR_SIZE);
dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
dwarf_data4(dwarf_info_section, start_abbrev);
}
else {
dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
dwarf_data4(dwarf_info_section, start_abbrev);
dwarf_data1(dwarf_info_section, PTR_SIZE);
}
dwarf_data1(dwarf_info_section, DWARF_ABBREV_COMPILE_UNIT);
dwarf_strp(dwarf_info_section, "tcc " TCC_VERSION);
dwarf_data1(dwarf_info_section, DW_LANG_C11);
dwarf_line_strp(dwarf_info_section, filename);
dwarf_line_strp(dwarf_info_section, buf);
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, ind); // low pc
dwarf_data4(dwarf_info_section, 0); // high pc
#else
dwarf_data8(dwarf_info_section, ind); // low pc
dwarf_data8(dwarf_info_section, 0); // high pc
#endif
dwarf_reloc(dwarf_info_section, dwarf_sym.line, R_DATA_32DW);
dwarf_data4(dwarf_info_section, dwarf_line_section->data_offset); // stmt_list
/* dwarf_line */
dwarf_line.start = dwarf_line_section->data_offset;
dwarf_data4(dwarf_line_section, 0); // length
dwarf_data2(dwarf_line_section, s1->dwarf); // version
if (s1->dwarf >= 5) {
dwarf_data1(dwarf_line_section, PTR_SIZE); // address size
dwarf_data1(dwarf_line_section, 0); // segment selector
}
dwarf_data4(dwarf_line_section, 0); // prologue Length
dwarf_data1(dwarf_line_section, DWARF_MIN_INSTR_LEN);
if (s1->dwarf >= 4)
dwarf_data1(dwarf_line_section, 1); // maximum ops per instruction
dwarf_data1(dwarf_line_section, 1); // Initial value of 'is_stmt'
dwarf_data1(dwarf_line_section, DWARF_LINE_BASE);
dwarf_data1(dwarf_line_section, DWARF_LINE_RANGE);
dwarf_data1(dwarf_line_section, DWARF_OPCODE_BASE);
ptr = section_ptr_add(dwarf_line_section, sizeof(dwarf_line_opcodes));
memcpy(ptr, dwarf_line_opcodes, sizeof(dwarf_line_opcodes));
undo = strrchr(filename, '/');
if (undo)
*undo = 0;
dwarf_line.dir_size = 1 + (undo != NULL);
dwarf_line.dir_table = (char **) tcc_malloc(sizeof (char *) *
dwarf_line.dir_size);
dwarf_line.dir_table[0] = tcc_strdup(buf);
if (undo)
dwarf_line.dir_table[1] = tcc_strdup(filename);
dwarf_line.filename_size = 2;
dwarf_line.filename_table =
(struct dwarf_filename_struct *)
tcc_malloc(2*sizeof (struct dwarf_filename_struct));
dwarf_line.filename_table[0].dir_entry = 0;
if (undo) {
dwarf_line.filename_table[0].name = tcc_strdup(undo + 1);
dwarf_line.filename_table[1].dir_entry = 1;
dwarf_line.filename_table[1].name = tcc_strdup(undo + 1);
*undo = '/';
}
else {
dwarf_line.filename_table[0].name = tcc_strdup(filename);
dwarf_line.filename_table[1].dir_entry = 0;
dwarf_line.filename_table[1].name = tcc_strdup(filename);
}
dwarf_line.line_size = dwarf_line.line_max_size = 0;
dwarf_line.line_data = NULL;
dwarf_line.cur_file = 1;
dwarf_line.last_file = 0;
dwarf_line.last_pc = 0;
dwarf_line.last_line = 1;
dwarf_line_op(s1, 0); // extended
dwarf_uleb128_op(s1, 1 + PTR_SIZE); // extended size
dwarf_line_op(s1, DW_LNE_set_address);
for (i = 0; i < PTR_SIZE; i++)
dwarf_line_op(s1, 0);
memset(&dwarf_info.base_type_used, 0, sizeof(dwarf_info.base_type_used));
}
else
{
/* file info: full path + filename */
pstrcat(buf, sizeof(buf), "/");
section_sym = put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
text_section->sh_num, NULL);
put_stabs_r(s1, buf, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
put_stabs_r(s1, filename, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
for (i = 0; i < N_DEFAULT_DEBUG; i++)
put_stabs(s1, default_debug[i].name, N_LSYM, 0, 0, 0);
}
/* we're currently 'including' the <command line> */
tcc_debug_bincl(s1);
}
}
/* put end of translation unit info */
ST_FUNC void tcc_debug_end(TCCState *s1)
{
if (!s1->do_debug || debug_next_type == 0)
return;
if (debug_info_root)
tcc_debug_funcend(s1, 0); /* free stuff in case of errors */
if (s1->dwarf) {
int i, j;
int start_aranges;
unsigned char *ptr;
int text_size = text_section->data_offset;
/* dwarf_info */
for (i = 0; i < n_debug_anon_hash; i++) {
Sym *t = debug_anon_hash[i].type;
int pos = dwarf_info_section->data_offset;
dwarf_data1(dwarf_info_section,
IS_UNION (t->type.t) ? DWARF_ABBREV_UNION_EMPTY_TYPE
: DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
dwarf_strp(dwarf_info_section,
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
dwarf_uleb128(dwarf_info_section, 0);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
write32le(dwarf_info_section->data +
debug_anon_hash[i].debug_type[j],
pos - dwarf_info.start);
tcc_free (debug_anon_hash[i].debug_type);
}
tcc_free (debug_anon_hash);
dwarf_data1(dwarf_info_section, 0);
ptr = dwarf_info_section->data + dwarf_info.start;
write32le(ptr, dwarf_info_section->data_offset - dwarf_info.start - 4);
write32le(ptr + 25 + (s1->dwarf >= 5) + PTR_SIZE, text_size);
/* dwarf_aranges */
start_aranges = dwarf_aranges_section->data_offset;
dwarf_data4(dwarf_aranges_section, 0); // size
dwarf_data2(dwarf_aranges_section, 2); // version
dwarf_reloc(dwarf_aranges_section, dwarf_sym.info, R_DATA_32DW);
dwarf_data4(dwarf_aranges_section, 0); // dwarf_info
#if PTR_SIZE == 4
dwarf_data1(dwarf_aranges_section, 4); // address size
#else
dwarf_data1(dwarf_aranges_section, 8); // address size
#endif
dwarf_data1(dwarf_aranges_section, 0); // segment selector size
dwarf_data4(dwarf_aranges_section, 0); // padding
dwarf_reloc(dwarf_aranges_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_aranges_section, 0); // Begin
dwarf_data4(dwarf_aranges_section, text_size); // End
dwarf_data4(dwarf_aranges_section, 0); // End list
dwarf_data4(dwarf_aranges_section, 0); // End list
#else
dwarf_data8(dwarf_aranges_section, 0); // Begin
dwarf_data8(dwarf_aranges_section, text_size); // End
dwarf_data8(dwarf_aranges_section, 0); // End list
dwarf_data8(dwarf_aranges_section, 0); // End list
#endif
ptr = dwarf_aranges_section->data + start_aranges;
write32le(ptr, dwarf_aranges_section->data_offset - start_aranges - 4);
/* dwarf_line */
if (s1->dwarf >= 5) {
dwarf_data1(dwarf_line_section, 1); /* col */
dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
dwarf_uleb128(dwarf_line_section, dwarf_line.dir_size);
for (i = 0; i < dwarf_line.dir_size; i++)
dwarf_line_strp(dwarf_line_section, dwarf_line.dir_table[i]);
dwarf_data1(dwarf_line_section, 2); /* col */
dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
dwarf_uleb128(dwarf_line_section, DW_LNCT_directory_index);
dwarf_uleb128(dwarf_line_section, DW_FORM_udata);
dwarf_uleb128(dwarf_line_section, dwarf_line.filename_size);
for (i = 0; i < dwarf_line.filename_size; i++) {
dwarf_line_strp(dwarf_line_section,
dwarf_line.filename_table[i].name);
dwarf_uleb128(dwarf_line_section,
dwarf_line.filename_table[i].dir_entry);
}
}
else {
int len;
for (i = 0; i < dwarf_line.dir_size; i++) {
len = strlen(dwarf_line.dir_table[i]) + 1;
ptr = section_ptr_add(dwarf_line_section, len);
memmove(ptr, dwarf_line.dir_table[i], len);
}
dwarf_data1(dwarf_line_section, 0); /* end dir */
for (i = 0; i < dwarf_line.filename_size; i++) {
len = strlen(dwarf_line.filename_table[i].name) + 1;
ptr = section_ptr_add(dwarf_line_section, len);
memmove(ptr, dwarf_line.filename_table[i].name, len);
dwarf_uleb128(dwarf_line_section,
dwarf_line.filename_table[i].dir_entry);
dwarf_uleb128(dwarf_line_section, 0); /* time */
dwarf_uleb128(dwarf_line_section, 0); /* size */
}
dwarf_data1(dwarf_line_section, 0); /* end file */
}
for (i = 0; i < dwarf_line.dir_size; i++)
tcc_free(dwarf_line.dir_table[i]);
tcc_free(dwarf_line.dir_table);
for (i = 0; i < dwarf_line.filename_size; i++)
tcc_free(dwarf_line.filename_table[i].name);
tcc_free(dwarf_line.filename_table);
dwarf_line_op(s1, 0); // extended
dwarf_uleb128_op(s1, 1); // extended size
dwarf_line_op(s1, DW_LNE_end_sequence);
i = (s1->dwarf >= 5) * 2;
write32le(&dwarf_line_section->data[dwarf_line.start + 6 + i],
dwarf_line_section->data_offset - dwarf_line.start - (10 + i));
section_ptr_add(dwarf_line_section, 3);
dwarf_reloc(dwarf_line_section, section_sym, R_DATA_PTR);
ptr = section_ptr_add(dwarf_line_section, dwarf_line.line_size - 3);
memmove(ptr - 3, dwarf_line.line_data, dwarf_line.line_size);
tcc_free(dwarf_line.line_data);
write32le(dwarf_line_section->data + dwarf_line.start,
dwarf_line_section->data_offset - dwarf_line.start - 4);
}
else
{
put_stabs_r(s1, NULL, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
}
tcc_free(debug_hash);
debug_next_type = 0;
}
static BufferedFile* put_new_file(TCCState *s1)
{
BufferedFile *f = file;
/* use upper file if from inline ":asm:" */
if (f->filename[0] == ':')
f = f->prev;
if (f && new_file) {
new_file = last_line_num = 0;
if (s1->dwarf)
dwarf_file(s1);
else
put_stabs_r(s1, f->filename, N_SOL, 0, 0, ind, text_section, section_sym);
}
return f;
}
/* put alternative filename */
ST_FUNC void tcc_debug_putfile(TCCState *s1, const char *filename)
{
if (0 == strcmp(file->filename, filename))
return;
pstrcpy(file->filename, sizeof(file->filename), filename);
if (!s1->do_debug)
return;
if (s1->dwarf)
dwarf_file(s1);
new_file = 1;
}
/* begin of #include */
ST_FUNC void tcc_debug_bincl(TCCState *s1)
{
if (!s1->do_debug)
return;
if (s1->dwarf)
dwarf_file(s1);
else
put_stabs(s1, file->filename, N_BINCL, 0, 0, 0);
new_file = 1;
}
/* end of #include */
ST_FUNC void tcc_debug_eincl(TCCState *s1)
{
if (!s1->do_debug)
return;
if (s1->dwarf)
dwarf_file(s1);
else
put_stabn(s1, N_EINCL, 0, 0, 0);
new_file = 1;
}
/* generate line number info */
ST_FUNC void tcc_debug_line(TCCState *s1)
{
BufferedFile *f;
if (!s1->do_debug)
return;
if (cur_text_section != text_section || nocode_wanted)
return;
f = put_new_file(s1);
if (!f)
return;
if (last_line_num == f->line_num)
return;
last_line_num = f->line_num;
if (s1->dwarf) {
int len_pc = (ind - dwarf_line.last_pc) / DWARF_MIN_INSTR_LEN;
int len_line = f->line_num - dwarf_line.last_line;
int n = len_pc * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
if (dwarf_line.cur_file != dwarf_line.last_file) {
dwarf_line.last_file = dwarf_line.cur_file;
dwarf_line_op(s1, DW_LNS_set_file);
dwarf_uleb128_op(s1, dwarf_line.cur_file);
}
if (len_pc &&
len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
n >= DWARF_OPCODE_BASE && n <= 255)
dwarf_line_op(s1, n);
else {
if (len_pc) {
n = len_pc * DWARF_LINE_RANGE + 0 + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
if (n >= DWARF_OPCODE_BASE && n <= 255)
dwarf_line_op(s1, n);
else {
dwarf_line_op(s1, DW_LNS_advance_pc);
dwarf_uleb128_op(s1, len_pc);
}
}
if (len_line) {
n = 0 * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
if (len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
n >= DWARF_OPCODE_BASE && n <= 255)
dwarf_line_op(s1, n);
else {
dwarf_line_op(s1, DW_LNS_advance_line);
dwarf_sleb128_op(s1, len_line);
}
}
}
dwarf_line.last_pc = ind;
dwarf_line.last_line = f->line_num;
}
else
{
if (func_ind != -1) {
put_stabn(s1, N_SLINE, 0, f->line_num, ind - func_ind);
} else {
/* from tcc_assemble */
put_stabs_r(s1, NULL, N_SLINE, 0, f->line_num, ind, text_section, section_sym);
}
}
}
static void tcc_debug_stabs (TCCState *s1, const char *str, int type, unsigned long value,
Section *sec, int sym_index, int info)
{
struct debug_sym *s;
if (debug_info) {
debug_info->sym =
(struct debug_sym *)tcc_realloc (debug_info->sym,
sizeof(struct debug_sym) *
(debug_info->n_sym + 1));
s = debug_info->sym + debug_info->n_sym++;
s->type = type;
s->value = value;
s->str = tcc_strdup(str);
s->sec = sec;
s->sym_index = sym_index;
s->info = info;
s->file = dwarf_line.cur_file;
s->line = file->line_num;
}
else if (sec)
put_stabs_r (s1, str, type, 0, 0, value, sec, sym_index);
else
put_stabs (s1, str, type, 0, 0, value);
}
ST_FUNC void tcc_debug_stabn(TCCState *s1, int type, int value)
{
if (!s1->do_debug)
return;
if (type == N_LBRAC) {
struct _debug_info *info =
(struct _debug_info *) tcc_mallocz(sizeof (*info));
info->start = value;
info->parent = debug_info;
if (debug_info) {
if (debug_info->child) {
if (debug_info->child->last)
debug_info->child->last->next = info;
else
debug_info->child->next = info;
debug_info->child->last = info;
}
else
debug_info->child = info;
}
else
debug_info_root = info;
debug_info = info;
}
else {
debug_info->end = value;
debug_info = debug_info->parent;
}
}
static int tcc_debug_find(TCCState *s1, Sym *t, int dwarf)
{
int i;
if (!debug_info && dwarf &&
(t->type.t & VT_BTYPE) == VT_STRUCT && t->c == -1) {
for (i = 0; i < n_debug_anon_hash; i++)
if (t == debug_anon_hash[i].type)
return 0;
debug_anon_hash = (struct _debug_anon_hash *)
tcc_realloc (debug_anon_hash,
(n_debug_anon_hash + 1) * sizeof(*debug_anon_hash));
debug_anon_hash[n_debug_anon_hash].n_debug_type = 0;
debug_anon_hash[n_debug_anon_hash].debug_type = NULL;
debug_anon_hash[n_debug_anon_hash++].type = t;
return 0;
}
for (i = 0; i < n_debug_hash; i++)
if (t == debug_hash[i].type)
return debug_hash[i].debug_type;
return -1;
}
static int tcc_get_dwarf_info(TCCState *s1, Sym *s);
static void tcc_debug_check_anon(TCCState *s1, Sym *t, int debug_type)
{
int i;
if (!debug_info && (t->type.t & VT_BTYPE) == VT_STRUCT && t->type.ref->c == -1)
for (i = 0; i < n_debug_anon_hash; i++)
if (t->type.ref == debug_anon_hash[i].type) {
debug_anon_hash[i].debug_type =
tcc_realloc(debug_anon_hash[i].debug_type,
(debug_anon_hash[i].n_debug_type + 1) * sizeof(int));
debug_anon_hash[i].debug_type[debug_anon_hash[i].n_debug_type++] =
debug_type;
}
}
ST_FUNC void tcc_debug_fix_anon(TCCState *s1, CType *t)
{
int i, j, debug_type;
if (!(s1->do_debug & 2) || !s1->dwarf || debug_info)
return;
if ((t->t & VT_BTYPE) == VT_STRUCT && t->ref->c != -1)
for (i = 0; i < n_debug_anon_hash; i++)
if (t->ref == debug_anon_hash[i].type) {
Sym sym = {0}; sym .type = *t ;
/* Trick to not hash this struct */
debug_info = (struct _debug_info *) t;
debug_type = tcc_get_dwarf_info(s1, &sym);
debug_info = NULL;
for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
write32le(dwarf_info_section->data +
debug_anon_hash[i].debug_type[j],
debug_type - dwarf_info.start);
tcc_free(debug_anon_hash[i].debug_type);
n_debug_anon_hash--;
for (; i < n_debug_anon_hash; i++)
debug_anon_hash[i] = debug_anon_hash[i + 1];
}
}
static int tcc_debug_add(TCCState *s1, Sym *t, int dwarf)
{
int offset = dwarf ? dwarf_info_section->data_offset : ++debug_next_type;
debug_hash = (struct _debug_hash *)
tcc_realloc (debug_hash,
(n_debug_hash + 1) * sizeof(*debug_hash));
debug_hash[n_debug_hash].debug_type = offset;
debug_hash[n_debug_hash++].type = t;
return offset;
}
static void tcc_debug_remove(TCCState *s1, Sym *t)
{
int i;
for (i = 0; i < n_debug_hash; i++)
if (t == debug_hash[i].type) {
n_debug_hash--;
for (; i < n_debug_hash; i++)
debug_hash[i] = debug_hash[i+1];
}
}
#define STRUCT_NODEBUG(s) \
(s->a.nodebug || \
((s->v & ~SYM_FIELD) >= SYM_FIRST_ANOM && \
((s->type.t & VT_BTYPE) == VT_BYTE || \
(s->type.t & VT_BTYPE) == VT_BOOL || \
(s->type.t & VT_BTYPE) == VT_SHORT || \
(s->type.t & VT_BTYPE) == VT_INT || \
(s->type.t & VT_BTYPE) == VT_LLONG)))
static void tcc_get_debug_info(TCCState *s1, Sym *s, CString *result)
{
int type;
int n = 0;
int debug_type = -1;
Sym *t = s;
CString str;
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
n++, t = t->type.ref;
else
break;
}
if ((type & VT_BTYPE) == VT_STRUCT) {
Sym *e = t;
t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 0);
if (debug_type == -1) {
debug_type = tcc_debug_add(s1, t, 0);
cstr_new (&str);
cstr_printf (&str, "%s:T%d=%c%d",
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL),
debug_type,
IS_UNION (t->type.t) ? 'u' : 's',
t->c);
while (t->next) {
int pos, size, align;
t = t->next;
if (STRUCT_NODEBUG(t))
continue;
cstr_printf (&str, "%s:",
get_tok_str(t->v, NULL));
tcc_get_debug_info (s1, t, &str);
if (t->type.t & VT_BITFIELD) {
pos = t->c * 8 + BIT_POS(t->type.t);
size = BIT_SIZE(t->type.t);
}
else {
pos = t->c * 8;
size = type_size(&t->type, &align) * 8;
}
cstr_printf (&str, ",%d,%d;", pos, size);
}
cstr_printf (&str, ";");
tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
cstr_free (&str);
if (debug_info)
tcc_debug_remove(s1, e);
}
}
else if (IS_ENUM(type)) {
Sym *e = t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 0);
if (debug_type == -1) {
debug_type = tcc_debug_add(s1, t, 0);
cstr_new (&str);
cstr_printf (&str, "%s:T%d=e",
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL),
debug_type);
while (t->next) {
t = t->next;
cstr_printf (&str, "%s:",
(t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
cstr_printf (&str, e->type.t & VT_UNSIGNED ? "%u," : "%d,",
(int)t->enum_val);
}
cstr_printf (&str, ";");
tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
cstr_free (&str);
if (debug_info)
tcc_debug_remove(s1, e);
}
}
else if ((type & VT_BTYPE) != VT_FUNC) {
type &= ~VT_STRUCT_MASK;
for (debug_type = 1; debug_type <= N_DEFAULT_DEBUG; debug_type++)
if (default_debug[debug_type - 1].type == type)
break;
if (debug_type > N_DEFAULT_DEBUG)
return;
}
if (n > 0)
cstr_printf (result, "%d=", ++debug_next_type);
t = s;
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR)
cstr_printf (result, "%d=*", ++debug_next_type);
else if (type == (VT_PTR | VT_ARRAY))
cstr_printf (result, "%d=ar1;0;%d;",
++debug_next_type, t->type.ref->c - 1);
else if (type == VT_FUNC) {
cstr_printf (result, "%d=f", ++debug_next_type);
tcc_get_debug_info (s1, t->type.ref, result);
return;
}
else
break;
t = t->type.ref;
}
cstr_printf (result, "%d", debug_type);
}
static int tcc_get_dwarf_info(TCCState *s1, Sym *s)
{
int type;
int debug_type = -1;
Sym *e, *t = s;
int i;
int last_pos = -1;
int retval;
if (new_file)
put_new_file(s1);
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
t = t->type.ref;
else
break;
}
if ((type & VT_BTYPE) == VT_STRUCT) {
t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 1);
if (debug_type == -1) {
int pos_sib = 0, i, *pos_type;
debug_type = tcc_debug_add(s1, t, 1);
e = t;
i = 0;
while (e->next) {
e = e->next;
if (STRUCT_NODEBUG(e))
continue;
i++;
}
pos_type = (int *) tcc_malloc(i * sizeof(int));
dwarf_data1(dwarf_info_section,
IS_UNION (t->type.t)
? t->next ? DWARF_ABBREV_UNION_TYPE
: DWARF_ABBREV_UNION_EMPTY_TYPE
: t->next ? DWARF_ABBREV_STRUCTURE_TYPE
: DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
dwarf_strp(dwarf_info_section,
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
dwarf_uleb128(dwarf_info_section, t->c);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
if (t->next) {
pos_sib = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
}
e = t;
i = 0;
while (e->next) {
e = e->next;
if (STRUCT_NODEBUG(e))
continue;
dwarf_data1(dwarf_info_section,
e->type.t & VT_BITFIELD ? DWARF_ABBREV_MEMBER_BF
: DWARF_ABBREV_MEMBER);
dwarf_strp(dwarf_info_section,
get_tok_str(e->v, NULL));
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
pos_type[i++] = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
if (e->type.t & VT_BITFIELD) {
int pos = e->c * 8 + BIT_POS(e->type.t);
int size = BIT_SIZE(e->type.t);
dwarf_uleb128(dwarf_info_section, size);
dwarf_uleb128(dwarf_info_section, pos);
}
else
dwarf_uleb128(dwarf_info_section, e->c);
}
if (t->next) {
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + pos_sib,
dwarf_info_section->data_offset - dwarf_info.start);
}
e = t;
i = 0;
while (e->next) {
e = e->next;
if (STRUCT_NODEBUG(e))
continue;
type = tcc_get_dwarf_info(s1, e);
tcc_debug_check_anon(s1, e, pos_type[i]);
write32le(dwarf_info_section->data + pos_type[i++],
type - dwarf_info.start);
}
tcc_free(pos_type);
if (debug_info)
tcc_debug_remove(s1, t);
}
}
else if (IS_ENUM(type)) {
t = t->type.ref;
debug_type = tcc_debug_find(s1, t, 1);
if (debug_type == -1) {
int pos_sib, pos_type;
Sym sym = {0}; sym.type.t = VT_INT | (type & VT_UNSIGNED);
pos_type = tcc_get_dwarf_info(s1, &sym);
debug_type = tcc_debug_add(s1, t, 1);
dwarf_data1(dwarf_info_section, DWARF_ABBREV_ENUMERATION_TYPE);
dwarf_strp(dwarf_info_section,
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v, NULL));
dwarf_data1(dwarf_info_section,
type & VT_UNSIGNED ? DW_ATE_unsigned : DW_ATE_signed );
dwarf_data1(dwarf_info_section, 4);
dwarf_data4(dwarf_info_section, pos_type - dwarf_info.start);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
pos_sib = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
e = t;
while (e->next) {
e = e->next;
dwarf_data1(dwarf_info_section,
type & VT_UNSIGNED ? DWARF_ABBREV_ENUMERATOR_UNSIGNED
: DWARF_ABBREV_ENUMERATOR_SIGNED);
dwarf_strp(dwarf_info_section,
(e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(e->v, NULL));
if (type & VT_UNSIGNED)
dwarf_uleb128(dwarf_info_section, e->enum_val);
else
dwarf_sleb128(dwarf_info_section, e->enum_val);
}
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + pos_sib,
dwarf_info_section->data_offset - dwarf_info.start);
if (debug_info)
tcc_debug_remove(s1, t);
}
}
else if ((type & VT_BTYPE) != VT_FUNC) {
type &= ~VT_STRUCT_MASK;
for (i = 1; i <= N_DEFAULT_DEBUG; i++)
if (default_debug[i - 1].type == type)
break;
if (i > N_DEFAULT_DEBUG)
return 0;
debug_type = dwarf_info.base_type_used[i - 1];
if (debug_type == 0) {
char name[100];
debug_type = dwarf_info_section->data_offset;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_BASE_TYPE);
dwarf_uleb128(dwarf_info_section, default_debug[i - 1].size);
dwarf_data1(dwarf_info_section, default_debug[i - 1].encoding);
strncpy(name, default_debug[i - 1].name, sizeof(name) -1);
*strchr(name, ':') = 0;
dwarf_strp(dwarf_info_section, name);
dwarf_info.base_type_used[i - 1] = debug_type;
}
}
retval = debug_type;
e = NULL;
t = s;
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
if ((type & VT_BTYPE) != VT_BYTE)
type &= ~VT_DEFSIGN;
if (type == VT_PTR) {
i = dwarf_info_section->data_offset;
if (retval == debug_type)
retval = i;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_POINTER);
dwarf_data1(dwarf_info_section, PTR_SIZE);
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
i - dwarf_info.start);
}
last_pos = dwarf_info_section->data_offset;
e = t->type.ref;
dwarf_data4(dwarf_info_section, 0);
}
else if (type == (VT_PTR | VT_ARRAY)) {
int sib_pos, sub_type;
#if LONG_SIZE == 4
Sym sym = {0}; sym.type.t = VT_LONG | VT_INT | VT_UNSIGNED;
#else
Sym sym = {0}; sym.type.t = VT_LLONG | VT_LONG | VT_UNSIGNED;
#endif
sub_type = tcc_get_dwarf_info(s1, &sym);
i = dwarf_info_section->data_offset;
if (retval == debug_type)
retval = i;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_ARRAY_TYPE);
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
i - dwarf_info.start);
}
last_pos = dwarf_info_section->data_offset;
e = t->type.ref;
dwarf_data4(dwarf_info_section, 0);
sib_pos = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
for (;;) {
dwarf_data1(dwarf_info_section, DWARF_ABBREV_SUBRANGE_TYPE);
dwarf_data4(dwarf_info_section, sub_type - dwarf_info.start);
dwarf_uleb128(dwarf_info_section, t->type.ref->c - 1);
s = t->type.ref;
type = s->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE);
if (type != (VT_PTR | VT_ARRAY))
break;
t = s;
}
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + sib_pos,
dwarf_info_section->data_offset - dwarf_info.start);
}
else if (type == VT_FUNC) {
int sib_pos = 0, *pos_type;
Sym *f;
i = dwarf_info_section->data_offset;
debug_type = tcc_get_dwarf_info(s1, t->type.ref);
if (retval == debug_type)
retval = i;
dwarf_data1(dwarf_info_section,
t->type.ref->next ? DWARF_ABBREV_SUBROUTINE_TYPE
: DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE);
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
i - dwarf_info.start);
}
last_pos = dwarf_info_section->data_offset;
e = t->type.ref;
dwarf_data4(dwarf_info_section, 0);
if (t->type.ref->next) {
sib_pos = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
}
f = t->type.ref;
i = 0;
while (f->next) {
f = f->next;
i++;
}
pos_type = (int *) tcc_malloc(i * sizeof(int));
f = t->type.ref;
i = 0;
while (f->next) {
f = f->next;
dwarf_data1(dwarf_info_section, DWARF_ABBREV_FORMAL_PARAMETER2);
pos_type[i++] = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0);
}
if (t->type.ref->next) {
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + sib_pos,
dwarf_info_section->data_offset - dwarf_info.start);
}
f = t->type.ref;
i = 0;
while (f->next) {
f = f->next;
type = tcc_get_dwarf_info(s1, f);
tcc_debug_check_anon(s1, f, pos_type[i]);
write32le(dwarf_info_section->data + pos_type[i++],
type - dwarf_info.start);
}
tcc_free(pos_type);
}
else {
if (last_pos != -1) {
tcc_debug_check_anon(s1, e, last_pos);
write32le(dwarf_info_section->data + last_pos,
debug_type - dwarf_info.start);
}
break;
}
t = t->type.ref;
}
return retval;
}
static void tcc_debug_finish (TCCState *s1, struct _debug_info *cur)
{
while (cur) {
struct _debug_info *next = cur->next;
int i;
if (s1->dwarf) {
for (i = cur->n_sym - 1; i >= 0; i--) {
struct debug_sym *s = &cur->sym[i];
dwarf_data1(dwarf_info_section,
s->type == N_PSYM
? DWARF_ABBREV_FORMAL_PARAMETER
: s->type == N_GSYM
? DWARF_ABBREV_VARIABLE_EXTERNAL
: s->type == N_STSYM
? DWARF_ABBREV_VARIABLE_STATIC
: DWARF_ABBREV_VARIABLE_LOCAL);
dwarf_strp(dwarf_info_section, s->str);
if (s->type == N_GSYM || s->type == N_STSYM) {
dwarf_uleb128(dwarf_info_section, s->file);
dwarf_uleb128(dwarf_info_section, s->line);
}
dwarf_data4(dwarf_info_section, s->info - dwarf_info.start);
if (s->type == N_GSYM || s->type == N_STSYM) {
/* global/static */
if (s->type == N_GSYM)
dwarf_data1(dwarf_info_section, 1);
dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
dwarf_data1(dwarf_info_section, DW_OP_addr);
if (s->type == N_STSYM)
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, s->value);
#else
dwarf_data8(dwarf_info_section, s->value);
#endif
}
else {
/* param/local */
dwarf_data1(dwarf_info_section, dwarf_sleb128_size(s->value) + 1);
dwarf_data1(dwarf_info_section, DW_OP_fbreg);
dwarf_sleb128(dwarf_info_section, s->value);
}
tcc_free (s->str);
}
tcc_free (cur->sym);
dwarf_data1(dwarf_info_section,
cur->child ? DWARF_ABBREV_LEXICAL_BLOCK
: DWARF_ABBREV_LEXICAL_EMPTY_BLOCK);
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, func_ind + cur->start);
dwarf_data4(dwarf_info_section, cur->end - cur->start);
#else
dwarf_data8(dwarf_info_section, func_ind + cur->start);
dwarf_data8(dwarf_info_section, cur->end - cur->start);
#endif
tcc_debug_finish (s1, cur->child);
if (cur->child)
dwarf_data1(dwarf_info_section, 0);
}
else
{
for (i = 0; i < cur->n_sym; i++) {
struct debug_sym *s = &cur->sym[i];
if (s->sec)
put_stabs_r(s1, s->str, s->type, 0, 0, s->value,
s->sec, s->sym_index);
else
put_stabs(s1, s->str, s->type, 0, 0, s->value);
tcc_free (s->str);
}
tcc_free (cur->sym);
put_stabn(s1, N_LBRAC, 0, 0, cur->start);
tcc_debug_finish (s1, cur->child);
put_stabn(s1, N_RBRAC, 0, 0, cur->end);
}
tcc_free (cur);
cur = next;
}
}
ST_FUNC void tcc_add_debug_info(TCCState *s1, int param, Sym *s, Sym *e)
{
CString debug_str;
if (!(s1->do_debug & 2))
return;
cstr_new (&debug_str);
for (; s != e; s = s->prev) {
if (!s->v || (s->r & VT_VALMASK) != VT_LOCAL)
continue;
if (s1->dwarf) {
tcc_debug_stabs(s1, get_tok_str(s->v, NULL),
param ? N_PSYM : N_LSYM, s->c, NULL, 0,
tcc_get_dwarf_info(s1, s));
}
else
{
cstr_reset (&debug_str);
cstr_printf (&debug_str, "%s:%s", get_tok_str(s->v, NULL),
param ? "p" : "");
tcc_get_debug_info(s1, s, &debug_str);
tcc_debug_stabs(s1, debug_str.data, param ? N_PSYM : N_LSYM,
s->c, NULL, 0, 0);
}
}
cstr_free (&debug_str);
}
/* put function symbol */
ST_FUNC void tcc_debug_funcstart(TCCState *s1, Sym *sym)
{
CString debug_str;
BufferedFile *f;
if (!s1->do_debug)
return;
debug_info_root = NULL;
debug_info = NULL;
tcc_debug_stabn(s1, N_LBRAC, ind - func_ind);
f = put_new_file(s1);
if (!f)
return;
if (s1->dwarf) {
tcc_debug_line(s1);
dwarf_info.func = sym;
dwarf_info.line = file->line_num;
if (s1->do_backtrace) {
int i, len;
dwarf_line_op(s1, 0); // extended
dwarf_uleb128_op(s1, strlen(funcname) + 2);
dwarf_line_op(s1, DW_LNE_hi_user - 1);
len = strlen(funcname) + 1;
for (i = 0; i < len; i++)
dwarf_line_op(s1, funcname[i]);
}
}
else
{
cstr_new (&debug_str);
cstr_printf(&debug_str, "%s:%c", funcname, sym->type.t & VT_STATIC ? 'f' : 'F');
tcc_get_debug_info(s1, sym->type.ref, &debug_str);
put_stabs_r(s1, debug_str.data, N_FUN, 0, f->line_num, 0, cur_text_section, sym->c);
cstr_free (&debug_str);
tcc_debug_line(s1);
}
}
ST_FUNC void tcc_debug_prolog_epilog(TCCState *s1, int value)
{
if (!s1->do_debug)
return;
if (s1->dwarf) {
dwarf_line_op(s1, value == 0 ? DW_LNS_set_prologue_end
: DW_LNS_set_epilogue_begin);
}
}
/* put function size */
ST_FUNC void tcc_debug_funcend(TCCState *s1, int size)
{
/* lldb does not like function end and next function start at same pc */
int min_instr_len;
if (!s1->do_debug)
return;
min_instr_len = dwarf_line.last_pc == ind ? 0 : DWARF_MIN_INSTR_LEN;
ind -= min_instr_len;
tcc_debug_line(s1);
ind += min_instr_len;
tcc_debug_stabn(s1, N_RBRAC, size);
if (s1->dwarf) {
int func_sib = 0;
Sym *sym = dwarf_info.func;
int n_debug_info = tcc_get_dwarf_info(s1, sym->type.ref);
dwarf_data1(dwarf_info_section,
sym->type.t & VT_STATIC ? DWARF_ABBREV_SUBPROGRAM_STATIC
: DWARF_ABBREV_SUBPROGRAM_EXTERNAL);
if ((sym->type.t & VT_STATIC) == 0)
dwarf_data1(dwarf_info_section, 1);
dwarf_strp(dwarf_info_section, funcname);
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, dwarf_info.line);
tcc_debug_check_anon(s1, sym->type.ref, dwarf_info_section->data_offset);
dwarf_data4(dwarf_info_section, n_debug_info - dwarf_info.start);
dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, func_ind); // low_pc
dwarf_data4(dwarf_info_section, size); // high_pc
#else
dwarf_data8(dwarf_info_section, func_ind); // low_pc
dwarf_data8(dwarf_info_section, size); // high_pc
#endif
func_sib = dwarf_info_section->data_offset;
dwarf_data4(dwarf_info_section, 0); // sibling
dwarf_data1(dwarf_info_section, 1);
#if defined(TCC_TARGET_I386)
dwarf_data1(dwarf_info_section, DW_OP_reg5); // ebp
#elif defined(TCC_TARGET_X86_64)
dwarf_data1(dwarf_info_section, DW_OP_reg6); // rbp
#elif defined TCC_TARGET_ARM
dwarf_data1(dwarf_info_section, DW_OP_reg13); // sp
#elif defined TCC_TARGET_ARM64
dwarf_data1(dwarf_info_section, DW_OP_reg29); // reg 29
#elif defined TCC_TARGET_RISCV64
dwarf_data1(dwarf_info_section, DW_OP_reg8); // r8(s0)
#else
dwarf_data1(dwarf_info_section, DW_OP_call_frame_cfa);
#endif
tcc_debug_finish (s1, debug_info_root);
dwarf_data1(dwarf_info_section, 0);
write32le(dwarf_info_section->data + func_sib,
dwarf_info_section->data_offset - dwarf_info.start);
}
else
{
tcc_debug_finish (s1, debug_info_root);
}
debug_info_root = 0;
}
ST_FUNC void tcc_debug_extern_sym(TCCState *s1, Sym *sym, int sh_num, int sym_bind, int sym_type)
{
if (!(s1->do_debug & 2))
return;
if (sym_type == STT_FUNC || sym->v >= SYM_FIRST_ANOM)
return;
if (s1->dwarf) {
int debug_type;
debug_type = tcc_get_dwarf_info(s1, sym);
dwarf_data1(dwarf_info_section,
sym_bind == STB_GLOBAL
? DWARF_ABBREV_VARIABLE_EXTERNAL
: DWARF_ABBREV_VARIABLE_STATIC);
dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
if (sym_bind == STB_GLOBAL)
dwarf_data1(dwarf_info_section, 1);
dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
dwarf_data1(dwarf_info_section, DW_OP_addr);
greloca(dwarf_info_section, sym, dwarf_info_section->data_offset,
R_DATA_PTR, 0);
#if PTR_SIZE == 4
dwarf_data4(dwarf_info_section, 0);
#else
dwarf_data8(dwarf_info_section, 0);
#endif
}
else
{
Section *s = sh_num == SHN_COMMON ? common_section
: s1->sections[sh_num];
CString str;
cstr_new (&str);
cstr_printf (&str, "%s:%c",
get_tok_str(sym->v, NULL),
sym_bind == STB_GLOBAL ? 'G' : func_ind != -1 ? 'V' : 'S'
);
tcc_get_debug_info(s1, sym, &str);
if (sym_bind == STB_GLOBAL)
tcc_debug_stabs(s1, str.data, N_GSYM, 0, NULL, 0, 0);
else
tcc_debug_stabs(s1, str.data,
(sym->type.t & VT_STATIC) && data_section == s
? N_STSYM : N_LCSYM, 0, s, sym->c, 0);
cstr_free (&str);
}
}
ST_FUNC void tcc_debug_typedef(TCCState *s1, Sym *sym)
{
if (!(s1->do_debug & 2))
return;
if (s1->dwarf) {
int debug_type;
debug_type = tcc_get_dwarf_info(s1, sym);
if (debug_type != -1) {
dwarf_data1(dwarf_info_section, DWARF_ABBREV_TYPEDEF);
dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
dwarf_uleb128(dwarf_info_section, file->line_num);
tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
}
}
else
{
CString str;
cstr_new (&str);
cstr_printf (&str, "%s:t",
(sym->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(sym->v, NULL));
tcc_get_debug_info(s1, sym, &str);
tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
cstr_free (&str);
}
}
/* ------------------------------------------------------------------------- */
/* for section layout see lib/tcov.c */
ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line);
ST_FUNC void tcc_tcov_block_begin(TCCState *s1)
{
SValue sv;
void *ptr;
unsigned long last_offset = tcov_data.offset;
tcc_tcov_block_end (tcc_state, 0);
if (s1->test_coverage == 0 || nocode_wanted)
return;
if (tcov_data.last_file_name == 0 ||
strcmp ((const char *)(tcov_section->data + tcov_data.last_file_name),
file->true_filename) != 0) {
char wd[1024];
CString cstr;
if (tcov_data.last_func_name)
section_ptr_add(tcov_section, 1);
if (tcov_data.last_file_name)
section_ptr_add(tcov_section, 1);
tcov_data.last_func_name = 0;
cstr_new (&cstr);
if (file->true_filename[0] == '/') {
tcov_data.last_file_name = tcov_section->data_offset;
cstr_printf (&cstr, "%s", file->true_filename);
}
else {
getcwd (wd, sizeof(wd));
tcov_data.last_file_name = tcov_section->data_offset + strlen(wd) + 1;
cstr_printf (&cstr, "%s/%s", wd, file->true_filename);
}
ptr = section_ptr_add(tcov_section, cstr.size + 1);
strcpy((char *)ptr, cstr.data);
#ifdef _WIN32
normalize_slashes((char *)ptr);
#endif
cstr_free (&cstr);
}
if (tcov_data.last_func_name == 0 ||
strcmp ((const char *)(tcov_section->data + tcov_data.last_func_name),
funcname) != 0) {
size_t len;
if (tcov_data.last_func_name)
section_ptr_add(tcov_section, 1);
tcov_data.last_func_name = tcov_section->data_offset;
len = strlen (funcname);
ptr = section_ptr_add(tcov_section, len + 1);
strcpy((char *)ptr, funcname);
section_ptr_add(tcov_section, -tcov_section->data_offset & 7);
ptr = section_ptr_add(tcov_section, 8);
write64le (ptr, file->line_num);
}
if (ind == tcov_data.ind && tcov_data.line == file->line_num)
tcov_data.offset = last_offset;
else {
Sym label = {0};
label.type.t = VT_LLONG | VT_STATIC;
ptr = section_ptr_add(tcov_section, 16);
tcov_data.line = file->line_num;
write64le (ptr, (tcov_data.line << 8) | 0xff);
put_extern_sym(&label, tcov_section,
((unsigned char *)ptr - tcov_section->data) + 8, 0);
sv.type = label.type;
sv.r = VT_SYM | VT_LVAL | VT_CONST;
sv.r2 = VT_CONST;
sv.c.i = 0;
sv.sym = &label;
#if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64 || \
defined TCC_TARGET_ARM || defined TCC_TARGET_ARM64 || \
defined TCC_TARGET_RISCV64
gen_increment_tcov (&sv);
#else
vpushv(&sv);
inc(0, TOK_INC);
vpop();
#endif
tcov_data.offset = (unsigned char *)ptr - tcov_section->data;
tcov_data.ind = ind;
}
}
ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line)
{
if (s1->test_coverage == 0)
return;
if (line == -1)
line = tcov_data.line;
if (tcov_data.offset) {
void *ptr = tcov_section->data + tcov_data.offset;
unsigned long long nline = line ? line : file->line_num;
write64le (ptr, (read64le (ptr) & 0xfffffffffull) | (nline << 36));
tcov_data.offset = 0;
}
}
ST_FUNC void tcc_tcov_check_line(TCCState *s1, int start)
{
if (s1->test_coverage == 0)
return;
if (tcov_data.line != file->line_num) {
if ((tcov_data.line + 1) != file->line_num) {
tcc_tcov_block_end (s1, -1);
if (start)
tcc_tcov_block_begin (s1);
}
else
tcov_data.line = file->line_num;
}
}
ST_FUNC void tcc_tcov_start(TCCState *s1)
{
if (s1->test_coverage == 0)
return;
if (!s1->dState)
s1->dState = tcc_mallocz(sizeof *s1->dState);
memset (&tcov_data, 0, sizeof (tcov_data));
if (tcov_section == NULL) {
tcov_section = new_section(tcc_state, ".tcov", SHT_PROGBITS,
SHF_ALLOC | SHF_WRITE);
section_ptr_add(tcov_section, 4); // pointer to executable name
}
}
ST_FUNC void tcc_tcov_end(TCCState *s1)
{
if (s1->test_coverage == 0)
return;
if (tcov_data.last_func_name)
section_ptr_add(tcov_section, 1);
if (tcov_data.last_file_name)
section_ptr_add(tcov_section, 1);
}
ST_FUNC void tcc_tcov_reset_ind(TCCState *s1)
{
tcov_data.ind = 0;
}
/* ------------------------------------------------------------------------- */
#undef last_line_num
#undef new_file
#undef section_sym
#undef debug_next_type
#undef debug_hash
#undef n_debug_hash
#undef debug_anon_hash
#undef n_debug_anon_hash
#undef debug_info
#undef debug_info_root
#undef dwarf_sym
#undef dwarf_line
#undef dwarf_info
#undef tcov_data
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