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Use gdb::def_vector in find_source_lines

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This replaces an explicit malloc and a cleanup with a gdb::def_vector.

2018-02-08  Tom Tromey  <tom@tromey.com>

	* source.c (find_source_lines): Use gdb::def_vector.
This commit is contained in:
Tom Tromey 2018-02-06 12:51:42 -07:00
parent 84f27c6fcb
commit a9abc43451
2 changed files with 12 additions and 12 deletions
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20
gdb/source.c
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@ -1186,7 +1186,7 @@ void
find_source_lines (struct symtab *s, int desc)
{
struct stat st;
char *data, *p, *end;
char *p, *end;
int nlines = 0;
int lines_allocated = 1000;
int *line_charpos;
@ -1207,23 +1207,20 @@ find_source_lines (struct symtab *s, int desc)
warning (_("Source file is more recent than executable."));
{
struct cleanup *old_cleanups;
/* st_size might be a large type, but we only support source files whose
size fits in an int. */
size = (int) st.st_size;
/* Use malloc, not alloca, because this may be pretty large, and we may
run into various kinds of limits on stack size. */
data = (char *) xmalloc (size);
old_cleanups = make_cleanup (xfree, data);
/* Use the heap, not the stack, because this may be pretty large,
and we may run into various kinds of limits on stack size. */
gdb::def_vector<char> data (size);
/* Reassign `size' to result of read for systems where \r\n -> \n. */
size = myread (desc, data, size);
size = myread (desc, data.data (), size);
if (size < 0)
perror_with_name (symtab_to_filename_for_display (s));
end = data + size;
p = data;
end = &data[size];
p = &data[0];
line_charpos[0] = 0;
nlines = 1;
while (p != end)
@ -1239,10 +1236,9 @@ find_source_lines (struct symtab *s, int desc)
(int *) xrealloc ((char *) line_charpos,
sizeof (int) * lines_allocated);
}
line_charpos[nlines++] = p - data;
line_charpos[nlines++] = p - data.data ();
}
}
do_cleanups (old_cleanups);
}
s->nlines = nlines;