OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

add -ltrans-objects lto-plugin debug option

Browse Source 
This adds a -ltrans-objects option to lto-plugin that by-passes
lto-wrapper invocation and instead feeds LD the final LTRANS objects
directly from the response file given as argument to the option.
This allows LD issues involving the linker-plugin path to be
debugged in an easier way with just the IR objects (their symtab)
and the LTRANS objects as testcase.

I've tested the path re-building stage2 build/genmatch from an
LTO bootstrap and got a bit-identical executable by adding
-plugin-opt=-ltrans-objects=y to the original collect2 invocation,
seeding y with the final objects as printed by building genmatch
with -save-temps -v.

2021-06-22  Richard Biener  <rguenther@suse.de>

lto-plugin/
	* lto-plugin.c (ltrans_objects): New global.
	(all_symbols_read_handler): If -ltrans-objects was specified,
	add the output files from the specified file directly.
	(process_option): Handle -ltrans-objects.
This commit is contained in:
Richard Biener 2021-06-22 08:43:15 +02:00
parent 607c558804
commit c6c7ac0499
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
lto-plugin/lto-plugin.c
View File

@ -190,6 +190,8 @@ static int lto_wrapper_num_args;
static char **pass_through_items = NULL;
static unsigned int num_pass_through_items;
static char *ltrans_objects = NULL;
static bool debug;
static bool save_temps;
static bool verbose;
@ -739,6 +741,14 @@ all_symbols_read_handler (void)
return LDPS_OK;
}
if (ltrans_objects)
{
FILE *objs = fopen (ltrans_objects, "r");
add_output_files (objs);
fclose (objs);
return LDPS_OK;
}
lto_argv = (char **) xcalloc (sizeof (char *), num_lto_args);
lto_arg_ptr = (const char **) lto_argv;
assert (lto_wrapper_argv);
@ -1345,6 +1355,8 @@ process_option (const char *option)
break;
}
}
else if (startswith (option, "-ltrans-objects="))
ltrans_objects = xstrdup (option + strlen ("-ltrans-objects="));
else
{
int size;