Add -ba option for bounds_checking

herman ten brugge committed 6 years ago

Commit 75145dd1 parent 4a2e33d5 files · +12 −1Browse files

Unified · Split

5 files

@@ -1482,6 +1482,7 @@ enum { · 1481 unmodified lines
1482	1482	TCC_OPTION_bench,
1483	1483	TCC_OPTION_bt,
1484	1484	TCC_OPTION_b,
	1485	+ TCC_OPTION_ba,
1485	1486	TCC_OPTION_g,
1486	1487	TCC_OPTION_c,
1487	1488	TCC_OPTION_dumpversion,
@@ -1544,6 +1545,7 @@ static const TCCOption tcc_options[] = { · 56 unmodified lines
1544	1545	#endif
1545	1546	#ifdef CONFIG_TCC_BCHECK
1546	1547	{ "b", TCC_OPTION_b, 0 },
	1548	+ { "ba", TCC_OPTION_ba, 0 },
1547	1549	#endif
1548	1550	{ "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG \| TCC_OPTION_NOSEP },
1549	1551	{ "c", TCC_OPTION_c, 0 },
@@ -1800,6 +1802,9 @@ reparse: · 250 unmodified lines
1800	1802	s->do_bounds_check = 1;
1801	1803	s->do_debug = 1;
1802	1804	break;
	1805	+ case TCC_OPTION_ba:
	1806	+ s->do_bounds_check_addres = 1;
	1807	+ break;
1803	1808	#endif
1804	1809	case TCC_OPTION_g:
1805	1810	s->do_debug = 1;

@@ -368,6 +368,9 @@ Try to continue in case of a bound checking error. · 367 unmodified lines
368	368
369	369	Note: @option{-b} is only available on i386 (linux and windows) and x86_64 (linux and windows) when using libtcc for the moment.
370	370
	371	+@item -ba
	372	+Generate address checking tests when using @option{-b}. This will be a lot slower but finds more errors.
	373	+
371	374	@item -bt N
372	375	Display N callers in stack traces. This is useful with @option{-g} or
373	376	@option{-b}.

tcc.c+1−0

@@ -59,6 +59,7 @@ static const char help[] = · 58 unmodified lines
59	59	" -g generate runtime debug info\n"
60	60	#ifdef CONFIG_TCC_BCHECK
61	61	" -b compile with built-in memory and bounds checker (implies -g)\n"
	62	+ " -ba Enable better addres checking with bounds checker\n"
62	63	#endif
63	64	#ifdef CONFIG_TCC_BACKTRACE
64	65	" -bt N show N callers in stack traces\n"

tcc.h+1−0

@@ -720,6 +720,7 @@ struct TCCState { · 719 unmodified lines
720	720	#ifdef CONFIG_TCC_BCHECK
721	721	/* compile with built-in memory and bounds checker */
722	722	unsigned char do_bounds_check;
	723	+ unsigned char do_bounds_check_addres;
723	724	#endif
724	725	#ifdef TCC_TARGET_ARM
725	726	enum float_abi float_abi; /* float ABI of the generated code*/

@@ -2509,7 +2509,8 @@ redo: · 2508 unmodified lines
2509	2509	*/
2510	2510	/* if evaluating constant expression, no code should be
2511	2511	generated, so no bound check */
2512		− if (tcc_state->do_bounds_check && !const_wanted && !nocode_wanted) {
	2512	+ if (tcc_state->do_bounds_check && tcc_state->do_bounds_check_addres
	2513	+ && !const_wanted && !nocode_wanted) {
2513	2514	/* if bounded pointers, we generate a special code to
2514	2515	test bounds */
2515	2516	if (op == '-') {

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