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tccgen.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
*/
#define USING_GLOBALS
#include "tcc.h"
/********************************************************/
/* global variables */
/* loc : local variable index
ind : output code index
rsym: return symbol
anon_sym: anonymous symbol index
*/
ST_DATA int rsym, anon_sym, ind, loc;
ST_DATA Sym *global_stack;
ST_DATA Sym *local_stack;
ST_DATA Sym *define_stack;
ST_DATA Sym *global_label_stack;
ST_DATA Sym *local_label_stack;
static Sym *sym_free_first;
static void **sym_pools;
static int nb_sym_pools;
static Sym *all_cleanups, *pending_gotos;
static int local_scope;
static int in_sizeof;
static int in_generic;
static int section_sym;
ST_DATA char debug_modes;
ST_DATA SValue *vtop;
static SValue _vstack[1 + VSTACK_SIZE];
#define vstack (_vstack + 1)
ST_DATA int const_wanted; /* true if constant wanted */
ST_DATA int nocode_wanted; /* no code generation wanted */
#define unevalmask 0xffff /* unevaluated subexpression */
#define NODATA_WANTED (nocode_wanted > 0) /* no static data output wanted either */
#define STATIC_DATA_WANTED (nocode_wanted & 0xC0000000) /* only static data output */
/* Automagical code suppression ----> */
#define CODE_OFF() (nocode_wanted |= 0x20000000)
#define CODE_ON() (nocode_wanted &= ~0x20000000)
static void tcc_tcov_block_begin(void);
/* Clear 'nocode_wanted' at label if it was used */
ST_FUNC void gsym(int t) { if (t) { gsym_addr(t, ind); CODE_ON(); }}
static int gind(void) { int t = ind; CODE_ON(); if (debug_modes) tcc_tcov_block_begin(); return t; }
/* Set 'nocode_wanted' after unconditional jumps */
static void gjmp_addr_acs(int t) { gjmp_addr(t); CODE_OFF(); }
static int gjmp_acs(int t) { t = gjmp(t); CODE_OFF(); return t; }
/* These are #undef'd at the end of this file */
#define gjmp_addr gjmp_addr_acs
#define gjmp gjmp_acs
/* <---- */
ST_DATA int global_expr; /* true if compound literals must be allocated globally (used during initializers parsing */
ST_DATA CType func_vt; /* current function return type (used by return instruction) */
ST_DATA int func_var; /* true if current function is variadic (used by return instruction) */
ST_DATA int func_vc;
static int last_line_num, new_file, func_ind; /* debug info control */
ST_DATA const char *funcname;
ST_DATA CType int_type, func_old_type, char_type, char_pointer_type;
static CString initstr;
#if PTR_SIZE == 4
#define VT_SIZE_T (VT_INT | VT_UNSIGNED)
#define VT_PTRDIFF_T VT_INT
#elif LONG_SIZE == 4
#define VT_SIZE_T (VT_LLONG | VT_UNSIGNED)
#define VT_PTRDIFF_T VT_LLONG
#else
#define VT_SIZE_T (VT_LONG | VT_LLONG | VT_UNSIGNED)
#define VT_PTRDIFF_T (VT_LONG | VT_LLONG)
#endif
ST_DATA struct switch_t {
struct case_t {
int64_t v1, v2;
int sym;
} **p; int n; /* list of case ranges */
int def_sym; /* default symbol */
int *bsym;
struct scope *scope;
struct switch_t *prev;
SValue sv;
} *cur_switch; /* current switch */
#define MAX_TEMP_LOCAL_VARIABLE_NUMBER 8
/*list of temporary local variables on the stack in current function. */
ST_DATA struct temp_local_variable {
int location; //offset on stack. Svalue.c.i
short size;
short align;
} arr_temp_local_vars[MAX_TEMP_LOCAL_VARIABLE_NUMBER];
short nb_temp_local_vars;
static struct scope {
struct scope *prev;
struct { int loc, locorig, num; } vla;
struct { Sym *s; int n; } cl;
int *bsym, *csym;
Sym *lstk, *llstk;
} *cur_scope, *loop_scope, *root_scope;
typedef struct {
Section *sec;
int local_offset;
Sym *flex_array_ref;
} init_params;
/********************************************************/
/* stab debug support */
static const struct {
int type;
const char *name;
} default_debug[] = {
{ VT_INT, "int:t1=r1;-2147483648;2147483647;" },
{ VT_BYTE, "char:t2=r2;0;127;" },
#if LONG_SIZE == 4
{ VT_LONG | VT_INT, "long int:t3=r3;-2147483648;2147483647;" },
#else
{ VT_LLONG | VT_LONG, "long int:t3=r3;-9223372036854775808;9223372036854775807;" },
#endif
{ VT_INT | VT_UNSIGNED, "unsigned int:t4=r4;0;037777777777;" },
#if LONG_SIZE == 4
{ VT_LONG | VT_INT | VT_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, "long unsigned int:t5=r5;0;01777777777777777777777;" },
#endif
{ VT_QLONG, "__int128:t6=r6;0;-1;" },
{ VT_QLONG | VT_UNSIGNED, "__int128 unsigned:t7=r7;0;-1;" },
{ VT_LLONG, "long long int:t8=r8;-9223372036854775808;9223372036854775807;" },
{ VT_LLONG | VT_UNSIGNED, "long long unsigned int:t9=r9;0;01777777777777777777777;" },
{ VT_SHORT, "short int:t10=r10;-32768;32767;" },
{ VT_SHORT | VT_UNSIGNED, "short unsigned int:t11=r11;0;65535;" },
{ VT_BYTE | VT_DEFSIGN, "signed char:t12=r12;-128;127;" },
{ VT_BYTE | VT_DEFSIGN | VT_UNSIGNED, "unsigned char:t13=r13;0;255;" },
{ VT_FLOAT, "float:t14=r1;4;0;" },
{ VT_DOUBLE, "double:t15=r1;8;0;" },
#ifdef TCC_USING_DOUBLE_FOR_LDOUBLE
{ VT_DOUBLE | VT_LONG, "long double:t16=r1;8;0;" },
#else
{ VT_LDOUBLE, "long double:t16=r1;16;0;" },
#endif
{ -1, "_Float32:t17=r1;4;0;" },
{ -1, "_Float64:t18=r1;8;0;" },
{ -1, "_Float128:t19=r1;16;0;" },
{ -1, "_Float32x:t20=r1;8;0;" },
{ -1, "_Float64x:t21=r1;16;0;" },
{ -1, "_Decimal32:t22=r1;4;0;" },
{ -1, "_Decimal64:t23=r1;8;0;" },
{ -1, "_Decimal128:t24=r1;16;0;" },
/* if default char is unsigned */
{ VT_BYTE | VT_UNSIGNED, "unsigned char:t25=r25;0;255;" },
/* boolean type */
{ VT_BOOL, "bool:t26=r26;0;255;" },
{ VT_VOID, "void:t27=27" },
};
static int debug_next_type;
static struct debug_hash {
int debug_type;
Sym *type;
} *debug_hash;
static int n_debug_hash;
static 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;
} *sym;
struct debug_info *child, *next, *last, *parent;
} *debug_info, *debug_info_root;
static struct {
unsigned long offset;
unsigned long last_file_name;
unsigned long last_func_name;
int ind;
int line;
} tcov_data;
/********************************************************/
#if 1
#define precedence_parser
static void init_prec(void);
#endif
/********************************************************/
#ifndef CONFIG_TCC_ASM
ST_FUNC void asm_instr(void)
{
tcc_error("inline asm() not supported");
}
ST_FUNC void asm_global_instr(void)
{
tcc_error("inline asm() not supported");
}
#endif
/* ------------------------------------------------------------------------- */
static void gen_cast(CType *type);
static void gen_cast_s(int t);
static inline CType *pointed_type(CType *type);
static int is_compatible_types(CType *type1, CType *type2);
static int parse_btype(CType *type, AttributeDef *ad);
static CType *type_decl(CType *type, AttributeDef *ad, int *v, int td);
static void parse_expr_type(CType *type);
static void init_putv(init_params *p, CType *type, unsigned long c);
static void decl_initializer(init_params *p, CType *type, unsigned long c, int flags);
static void block(int is_expr);
static void decl_initializer_alloc(CType *type, AttributeDef *ad, int r, int has_init, int v, int scope);
static void decl(int l);
static int decl0(int l, int is_for_loop_init, Sym *);
static void expr_eq(void);
static void vla_runtime_type_size(CType *type, int *a);
static int is_compatible_unqualified_types(CType *type1, CType *type2);
static inline int64_t expr_const64(void);
static void vpush64(int ty, unsigned long long v);
static void vpush(CType *type);
static int gvtst(int inv, int t);
static void gen_inline_functions(TCCState *s);
static void free_inline_functions(TCCState *s);
static void skip_or_save_block(TokenString **str);
static void gv_dup(void);
static int get_temp_local_var(int size,int align);
static void clear_temp_local_var_list();
static void cast_error(CType *st, CType *dt);
ST_INLN int is_float(int t)
{
int bt = t & VT_BTYPE;
return bt == VT_LDOUBLE
|| bt == VT_DOUBLE
|| bt == VT_FLOAT
|| bt == VT_QFLOAT;
}
static inline int is_integer_btype(int bt)
{
return bt == VT_BYTE
|| bt == VT_BOOL
|| bt == VT_SHORT
|| bt == VT_INT
|| bt == VT_LLONG;
}
static int btype_size(int bt)
{
return bt == VT_BYTE || bt == VT_BOOL ? 1 :
bt == VT_SHORT ? 2 :
bt == VT_INT ? 4 :
bt == VT_LLONG ? 8 :
bt == VT_PTR ? PTR_SIZE : 0;
}
/* returns function return register from type */
static int R_RET(int t)
{
if (!is_float(t))
return REG_IRET;
#ifdef TCC_TARGET_X86_64
if ((t & VT_BTYPE) == VT_LDOUBLE)
return TREG_ST0;
#elif defined TCC_TARGET_RISCV64
if ((t & VT_BTYPE) == VT_LDOUBLE)
return REG_IRET;
#endif
return REG_FRET;
}
/* returns 2nd function return register, if any */
static int R2_RET(int t)
{
t &= VT_BTYPE;
#if PTR_SIZE == 4
if (t == VT_LLONG)
return REG_IRE2;
#elif defined TCC_TARGET_X86_64
if (t == VT_QLONG)
return REG_IRE2;
if (t == VT_QFLOAT)
return REG_FRE2;
#elif defined TCC_TARGET_RISCV64
if (t == VT_LDOUBLE)
return REG_IRE2;
#endif
return VT_CONST;
}
/* returns true for two-word types */
#define USING_TWO_WORDS(t) (R2_RET(t) != VT_CONST)
/* put function return registers to stack value */
static void PUT_R_RET(SValue *sv, int t)
{
sv->r = R_RET(t), sv->r2 = R2_RET(t);
}
/* returns function return register class for type t */
static int RC_RET(int t)
{
return reg_classes[R_RET(t)] & ~(RC_FLOAT | RC_INT);
}
/* returns generic register class for type t */
static int RC_TYPE(int t)
{
if (!is_float(t))
return RC_INT;
#ifdef TCC_TARGET_X86_64
if ((t & VT_BTYPE) == VT_LDOUBLE)
return RC_ST0;
if ((t & VT_BTYPE) == VT_QFLOAT)
return RC_FRET;
#elif defined TCC_TARGET_RISCV64
if ((t & VT_BTYPE) == VT_LDOUBLE)
return RC_INT;
#endif
return RC_FLOAT;
}
/* returns 2nd register class corresponding to t and rc */
static int RC2_TYPE(int t, int rc)
{
if (!USING_TWO_WORDS(t))
return 0;
#ifdef RC_IRE2
if (rc == RC_IRET)
return RC_IRE2;
#endif
#ifdef RC_FRE2
if (rc == RC_FRET)
return RC_FRE2;
#endif
if (rc & RC_FLOAT)
return RC_FLOAT;
return RC_INT;
}
/* we use our own 'finite' function to avoid potential problems with
non standard math libs */
/* XXX: endianness dependent */
ST_FUNC int ieee_finite(double d)
{
int p[4];
memcpy(p, &d, sizeof(double));
return ((unsigned)((p[1] | 0x800fffff) + 1)) >> 31;
}
/* compiling intel long double natively */
#if (defined __i386__ || defined __x86_64__) \
&& (defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64)
# define TCC_IS_NATIVE_387
#endif
ST_FUNC void test_lvalue(void)
{
if (!(vtop->r & VT_LVAL))
expect("lvalue");
}
ST_FUNC void check_vstack(void)
{
if (vtop != vstack - 1)
tcc_error("internal compiler error: vstack leak (%d)",
(int)(vtop - vstack + 1));
}
/* ------------------------------------------------------------------------- */
/* vstack debugging aid */
#if 0
void pv (const char *lbl, int a, int b)
{
int i;
for (i = a; i < a + b; ++i) {
SValue *p = &vtop[-i];
printf("%s vtop[-%d] : type.t:%04x r:%04x r2:%04x c.i:%d\n",
lbl, i, p->type.t, p->r, p->r2, (int)p->c.i);
}
}
#endif
/* ------------------------------------------------------------------------- */
/* start of translation unit info */
ST_FUNC void tcc_debug_start(TCCState *s1)
{
if (s1->do_debug) {
int i;
char buf[512];
/* file info: full path + filename */
section_sym = put_elf_sym(symtab_section, 0, 0,
ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
text_section->sh_num, NULL);
getcwd(buf, sizeof(buf));
#ifdef _WIN32
normalize_slashes(buf);
#endif
pstrcat(buf, sizeof(buf), "/");
put_stabs_r(s1, buf, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
put_stabs_r(s1, file->prev ? file->prev->filename : file->filename,
N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
for (i = 0; i < sizeof (default_debug) / sizeof (default_debug[0]); i++)
put_stabs(s1, default_debug[i].name, N_LSYM, 0, 0, 0);
new_file = last_line_num = 0;
func_ind = -1;
debug_next_type = sizeof(default_debug) / sizeof(default_debug[0]);
debug_hash = NULL;
n_debug_hash = 0;
/* we're currently 'including' the <command line> */
tcc_debug_bincl(s1);
}
/* 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, file->filename);
}
/* put end of translation unit info */
ST_FUNC void tcc_debug_end(TCCState *s1)
{
if (!s1->do_debug)
return;
put_stabs_r(s1, NULL, N_SO, 0, 0,
text_section->data_offset, text_section, section_sym);
tcc_free(debug_hash);
}
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) {
put_stabs_r(s1, f->filename, N_SOL, 0, 0, ind, text_section, section_sym);
new_file = last_line_num = 0;
}
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);
new_file = 1;
}
/* begin of #include */
ST_FUNC void tcc_debug_bincl(TCCState *s1)
{
if (!s1->do_debug)
return;
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;
put_stabn(s1, N_EINCL, 0, 0, 0);
new_file = 1;
}
/* generate line number info */
static void tcc_debug_line(TCCState *s1)
{
BufferedFile *f;
if (!s1->do_debug
|| cur_text_section != text_section
|| !(f = put_new_file(s1))
|| last_line_num == f->line_num)
return;
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);
}
last_line_num = f->line_num;
}
static void tcc_debug_stabs (TCCState *s1, const char *str, int type, unsigned long value,
Section *sec, int sym_index)
{
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;
}
else if (sec)
put_stabs_r (s1, str, type, 0, 0, value, sec, sym_index);
else
put_stabs (s1, str, type, 0, 0, value);
}
static 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 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);
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) {
int i;
t = t->type.ref;
for (i = 0; i < n_debug_hash; i++) {
if (t == debug_hash[i].type) {
debug_type = debug_hash[i].debug_type;
break;
}
}
if (debug_type == -1) {
debug_type = ++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 = debug_type;
debug_hash[n_debug_hash++].type = t;
cstr_new (&str);
cstr_printf (&str, "%s:T%d=%c%d",
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
debug_type,
IS_UNION (t->type.t) ? 'u' : 's',
t->c);
while (t->next) {
int pos, size, align;
t = t->next;
cstr_printf (&str, "%s:",
(t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v & ~SYM_FIELD, 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);
cstr_free (&str);
}
}
else if (IS_ENUM(type)) {
Sym *e = t = t->type.ref;
debug_type = ++debug_next_type;
cstr_new (&str);
cstr_printf (&str, "%s:T%d=e",
(t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
? "" : get_tok_str(t->v & ~SYM_STRUCT, 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 & ~SYM_FIELD, 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);
cstr_free (&str);
}
else if ((type & VT_BTYPE) != VT_FUNC) {
type &= ~VT_STRUCT_MASK;
for (debug_type = 1;
debug_type <= sizeof(default_debug) / sizeof(default_debug[0]);
debug_type++)
if (default_debug[debug_type - 1].type == type)
break;
if (debug_type > sizeof(default_debug) / sizeof(default_debug[0]))
return;
}
if (n > 0)
cstr_printf (result, "%d=", ++debug_next_type);
t = s;
for (;;) {
type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE);
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 void tcc_debug_finish (TCCState *s1, struct debug_info *cur)
{
while (cur) {
int i;
struct debug_info *next = cur->next;
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;
}
}
static void tcc_add_debug_info(TCCState *s1, int param, Sym *s, Sym *e)
{
CString debug_str;
if (!s1->do_debug)
return;
cstr_new (&debug_str);
for (; s != e; s = s->prev) {
if (!s->v || (s->r & VT_VALMASK) != VT_LOCAL)
continue;
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);
}
cstr_free (&debug_str);
}
/* put function symbol */
static 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);
if (!(f = put_new_file(s1)))
return;
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);
}
/* put function size */
static void tcc_debug_funcend(TCCState *s1, int size)
{
if (!s1->do_debug)
return;
tcc_debug_stabn(s1, N_RBRAC, size);
tcc_debug_finish (s1, debug_info_root);
}
static void tcc_debug_extern_sym(TCCState *s1, Sym *sym, int sh_num, int sym_bind, int sym_type)
{
Section *s;
CString str;
if (!s1->do_debug)
return;
if (sym_type == STT_FUNC || sym->v >= SYM_FIRST_ANOM)
return;
s = s1->sections[sh_num];
cstr_new (&str);
cstr_printf (&str, "%s:%c",
get_tok_str(sym->v, NULL),
sym_bind == STB_GLOBAL ? 'G' : local_scope ? '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);
else
tcc_debug_stabs(s1, str.data,
(sym->type.t & VT_STATIC) && data_section == s
? N_STSYM : N_LCSYM, 0, s, sym->c);
cstr_free (&str);
}
static void tcc_debug_typedef(TCCState *s1, Sym *sym)
{
CString str;
if (!s1->do_debug)
return;
cstr_new (&str);
cstr_printf (&str, "%s:t",
(sym->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
? "" : get_tok_str(sym->v & ~SYM_FIELD, NULL));
tcc_get_debug_info(s1, sym, &str);
tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0);
cstr_free (&str);
}
/* ------------------------------------------------------------------------- */
/* for section layout see lib/tcov.c */
static void tcc_tcov_block_end(int line);
static void tcc_tcov_block_begin(void)
{
SValue sv;
void *ptr;
unsigned long last_offset = tcov_data.offset;
tcc_tcov_block_end (0);
if (tcc_state->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);
strncpy((char *)ptr, cstr.data, cstr.size);
#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);
strncpy((char *)ptr, funcname, len);
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;
}
}
static void tcc_tcov_block_end(int line)
{
if (tcc_state->test_coverage == 0)
return;
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;
}
}
static void tcc_tcov_check_line(int start)
{
if (tcc_state->test_coverage == 0)
return;
if (tcov_data.line != file->line_num) {
if ((tcov_data.line + 1) != file->line_num) {
tcc_tcov_block_end (tcov_data.line);
if (start)
tcc_tcov_block_begin ();
}
else
tcov_data.line = file->line_num;
}
}
static void tcc_tcov_start(void)
{
if (tcc_state->test_coverage == 0)
return;
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
}
}
static void tcc_tcov_end(void)
{
if (tcc_state->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);
}
/* ------------------------------------------------------------------------- */
/* initialize vstack and types. This must be done also for tcc -E */
ST_FUNC void tccgen_init(TCCState *s1)
{
vtop = vstack - 1;
memset(vtop, 0, sizeof *vtop);
/* define some often used types */
int_type.t = VT_INT;
char_type.t = VT_BYTE;
if (s1->char_is_unsigned)
char_type.t |= VT_UNSIGNED;
char_pointer_type = char_type;
mk_pointer(&char_pointer_type);
func_old_type.t = VT_FUNC;
func_old_type.ref = sym_push(SYM_FIELD, &int_type, 0, 0);
func_old_type.ref->f.func_call = FUNC_CDECL;
func_old_type.ref->f.func_type = FUNC_OLD;
#ifdef precedence_parser
init_prec();
#endif
cstr_new(&initstr);
}
ST_FUNC int tccgen_compile(TCCState *s1)
{
cur_text_section = NULL;
funcname = "";
anon_sym = SYM_FIRST_ANOM;
section_sym = 0;
const_wanted = 0;
nocode_wanted = 0x80000000;
local_scope = 0;
debug_modes = s1->do_debug | s1->test_coverage << 1;
tcc_debug_start(s1);
tcc_tcov_start ();
#ifdef TCC_TARGET_ARM
arm_init(s1);
#endif
#ifdef INC_DEBUG
printf("%s: **** new file\n", file->filename);
#endif
parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM | PARSE_FLAG_TOK_STR;
next();
decl(VT_CONST);