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lto-plugin: support LDPT_GET_SYMBOLS_V3

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That supports skipping of an object file (LDPS_NO_SYMS).

lto-plugin/ChangeLog:

	* lto-plugin.c (struct plugin_file_info): Add skip_file flag.
	(write_resolution): Write resolution only if get_symbols != LDPS_NO_SYMS.
	(all_symbols_read_handler): Ignore file if skip_file is true.
	(onload): Handle LDPT_GET_SYMBOLS_V3.
This commit is contained in:
Martin Liska 2022-02-14 11:31:43 +01:00
parent 9f55aee9dc
commit c56f7983be
1 changed files with 35 additions and 7 deletions
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40
lto-plugin/lto-plugin.c
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@ -136,6 +136,7 @@ struct plugin_file_info
void *handle;
struct plugin_symtab symtab;
struct plugin_symtab conflicts;
bool skip_file;
};
/* List item with name of the file with offloading. */
@ -159,7 +160,7 @@ enum symbol_style
static char *arguments_file_name;
static ld_plugin_register_claim_file register_claim_file;
static ld_plugin_register_all_symbols_read register_all_symbols_read;
static ld_plugin_get_symbols get_symbols, get_symbols_v2;
static ld_plugin_get_symbols get_symbols, get_symbols_v2, get_symbols_v3;
static ld_plugin_register_cleanup register_cleanup;
static ld_plugin_add_input_file add_input_file;
static ld_plugin_add_input_library add_input_library;
@ -547,15 +548,13 @@ free_symtab (struct plugin_symtab *symtab)
static void
write_resolution (void)
{
unsigned int i;
unsigned int i, included_files = 0;
FILE *f;
check (resolution_file, LDPL_FATAL, "resolution file not specified");
f = fopen (resolution_file, "w");
check (f, LDPL_FATAL, "could not open file");
fprintf (f, "%d\n", num_claimed_files);
for (i = 0; i < num_claimed_files; i++)
{
struct plugin_file_info *info = &claimed_files[i];
@ -563,13 +562,38 @@ write_resolution (void)
struct ld_plugin_symbol *syms = symtab->syms;
/* Version 2 of API supports IRONLY_EXP resolution that is
accepted by GCC-4.7 and newer. */
if (get_symbols_v2)
accepted by GCC-4.7 and newer.
Version 3 can return LDPS_NO_SYMS that means the object
will not be used at all. */
if (get_symbols_v3)
{
enum ld_plugin_status status
= get_symbols_v3 (info->handle, symtab->nsyms, syms);
if (status == LDPS_NO_SYMS)
{
info->skip_file = true;
continue;
}
}
else if (get_symbols_v2)
get_symbols_v2 (info->handle, symtab->nsyms, syms);
else
get_symbols (info->handle, symtab->nsyms, syms);
++included_files;
finish_conflict_resolution (symtab, &info->conflicts);
}
fprintf (f, "%d\n", included_files);
for (i = 0; i < num_claimed_files; i++)
{
struct plugin_file_info *info = &claimed_files[i];
struct plugin_symtab *symtab = &info->symtab;
if (info->skip_file)
continue;
fprintf (f, "%s %d\n", info->name, symtab->nsyms + info->conflicts.nsyms);
dump_symtab (f, symtab);
@ -833,6 +857,7 @@ all_symbols_read_handler (void)
{
struct plugin_file_info *info = &claimed_files[i];
if (!info->skip_file)
*lto_arg_ptr++ = info->name;
}
@ -1410,6 +1435,9 @@ onload (struct ld_plugin_tv *tv)
case LDPT_REGISTER_ALL_SYMBOLS_READ_HOOK:
register_all_symbols_read = p->tv_u.tv_register_all_symbols_read;
break;
case LDPT_GET_SYMBOLS_V3:
get_symbols_v3 = p->tv_u.tv_get_symbols;
break;
case LDPT_GET_SYMBOLS_V2:
get_symbols_v2 = p->tv_u.tv_get_symbols;
break;