mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-05 16:24:02 +08:00
3b336828de
If the first requested line is larger than the number of lines in the source buffer, source_cache::extract_lines could crash, because it would try to pass string::npos" to string::substr. This patch avoids the crash by checking for this case. This version of the patch changes get_source_lines to return std::string. gdb/ChangeLog 2019-03-14 Tom Tromey <tromey@adacore.com> * source-cache.h (class source_cache) <get_source_lines>: Return std::string. * source-cache.c (source_cache::extract_lines): Handle case where first_pos==npos. Return std::string. (source_cache::get_source_lines): Update.
81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
/* Cache of styled source file text
|
|
Copyright (C) 2018-2019 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
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 3 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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef SOURCE_CACHE_H
|
|
#define SOURCE_CACHE_H
|
|
|
|
/* This caches highlighted source text, keyed by the source file's
|
|
full name. A size-limited LRU cache is used.
|
|
|
|
Highlighting depends on the GNU Source Highlight library. When not
|
|
available, this cache will fall back on reading plain text from the
|
|
appropriate file. */
|
|
class source_cache
|
|
{
|
|
public:
|
|
|
|
source_cache ()
|
|
{
|
|
}
|
|
|
|
/* Get the source text for the source file in symtab S. FIRST_LINE
|
|
and LAST_LINE are the first and last lines to return; line
|
|
numbers are 1-based. If the file cannot be read, false is
|
|
returned. Otherwise, LINES_OUT is set to the desired text. The
|
|
returned text may include ANSI terminal escapes. */
|
|
bool get_source_lines (struct symtab *s, int first_line,
|
|
int last_line, std::string *lines_out);
|
|
|
|
/* Remove all the items from the source cache. */
|
|
void clear ()
|
|
{
|
|
m_source_map.clear ();
|
|
}
|
|
|
|
private:
|
|
|
|
/* One element in the cache. */
|
|
struct source_text
|
|
{
|
|
/* The full name of the file. */
|
|
std::string fullname;
|
|
/* The contents of the file. */
|
|
std::string contents;
|
|
};
|
|
|
|
/* A helper function for get_source_lines that is used when the
|
|
source lines are not highlighted. The arguments and return value
|
|
are as for get_source_lines. */
|
|
bool get_plain_source_lines (struct symtab *s, int first_line,
|
|
int last_line, std::string *lines_out);
|
|
/* A helper function for get_plain_source_lines that extracts the
|
|
desired source lines from TEXT, putting them into LINES_OUT. The
|
|
arguments are as for get_source_lines. The return value is the
|
|
desired lines. */
|
|
std::string extract_lines (const struct source_text &text, int first_line,
|
|
int last_line);
|
|
|
|
/* The contents of the cache. */
|
|
std::vector<source_text> m_source_map;
|
|
};
|
|
|
|
/* The global source cache. */
|
|
extern source_cache g_source_cache;
|
|
|
|
#endif /* SOURCE_CACHE_H */
|