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tccrun.c: better stab debug support

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* a major revision of the rt_printline() feature in
  tccrun.c to report file:linenumber more correctly.

* minor changes to the stab info produced by the
  compiler in tccgen.c

However stab addresses are limited to 32 bits.  I added
a work around:

    if (sizeof pc == 8)
        pc |= wanted_pc & 0xffffffff00000000ULL;

However GDB has problems with that too.
This commit is contained in:
grischka
2019-12-14 12:36:12 +01:00
parent 56db092ab7
commit 65f74a4df0
5 changed files with 385 additions and 388 deletions
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19
tccpp.c
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@@ -1862,8 +1862,7 @@ ST_FUNC void preprocess(int is_bof)
tcc_strdup(buf1));
}
/* add include file debug info */
if (s1->do_debug)
put_stabs(tcc_state, file->filename, N_BINCL, 0, 0, 0);
tcc_debug_bincl(tcc_state);
tok_flags |= TOK_FLAG_BOF | TOK_FLAG_BOL;
ch = file->buf_ptr[0];
goto the_end;
@@ -1961,7 +1960,7 @@ include_done:
if (tok == TOK_STR) {
if (file->true_filename == file->filename)
file->true_filename = tcc_strdup(file->filename);
pstrcpy(file->filename, sizeof(file->filename), (char *)tokc.str.data);
tcc_debug_putfile(s1, (char *)tokc.str.data);
} else if (parse_flags & PARSE_FLAG_ASM_FILE)
break;
else
@@ -1971,8 +1970,6 @@ include_done:
if (file->fd > 0)
total_lines += file->line_num - n;
file->line_num = n;
if (s1->do_debug)
put_stabs(tcc_state, file->filename, N_BINCL, 0, 0, 0);
break;
case TOK_ERROR:
case TOK_WARNING:
@@ -2629,9 +2626,7 @@ static inline void next_nomacro1(void)
}
/* add end of include file debug info */
if (tcc_state->do_debug && strcmp (file->filename, "<command line>") != 0) {
put_stabd(tcc_state, N_EINCL, 0, 0);
}
tcc_debug_eincl(tcc_state);
/* pop include stack */
tcc_close();
s1->include_stack_ptr--;
@@ -3611,14 +3606,14 @@ ST_FUNC void preprocess_start(TCCState *s1, int is_asm)
set_idnum('.', is_asm ? IS_ID : 0);
cstr_new(&cstr);
if (is_asm)
cstr_printf(&cstr, "#define __ASSEMBLER__ 1\n");
cstr_printf(&cstr, "#define __BASE_FILE__ \"%s\"\n", file->filename);
if (s1->cmdline_defs.size)
cstr_cat(&cstr, s1->cmdline_defs.data, s1->cmdline_defs.size);
//printf("%s\n", (char*)s1->cmdline_defs.data);
cstr_printf(&cstr, "#define __BASE_FILE__ \"%s\"\n", file->filename);
if (is_asm)
cstr_printf(&cstr, "#define __ASSEMBLER__ 1\n");
if (s1->cmdline_incl.size)
cstr_cat(&cstr, s1->cmdline_incl.data, s1->cmdline_incl.size);
//printf("%s\n", (char*)cstr.data);
*s1->include_stack_ptr++ = file;
tcc_open_bf(s1, "<command line>", cstr.size);
memcpy(file->buffer, cstr.data, cstr.size);