{
uint32_t pch_write_symbols;
signed char match[MATCH_SIZE];
- void (*pch_init) (void);
size_t target_data_length;
};
gcc_assert (v.match[i] == *pch_matching[i].flag_var);
}
}
- v.pch_init = &pch_init;
target_validity = targetm.get_pch_validity (&v.target_data_length);
if (fwrite (partial_pch, IDENT_LENGTH, 1, f) != 1
}
}
- /* If the text segment was not loaded at the same address as it was
- when the PCH file was created, function pointers loaded from the
- PCH will not be valid. We could in theory remap all the function
- pointers, but no support for that exists at present.
- Since we have the same executable, it should only be necessary to
- check one function. */
- if (v.pch_init != &pch_init)
- {
- cpp_warning (pfile, CPP_W_INVALID_PCH,
- "%s: had text segment at different address", name);
- return 2;
- }
-
/* Check the target-specific validity data. */
{
void *this_file_data = xmalloc (v.target_data_length);
/* Unnamed section callback for progmem*.data sections. */
static void
-avr_output_progmem_section_asm_op (const void *data)
+avr_output_progmem_section_asm_op (const char *data)
{
- fprintf (asm_out_file, "\t.section\t%s,\"a\",@progbits\n",
- (const char*) data);
+ fprintf (asm_out_file, "\t.section\t%s,\"a\",@progbits\n", data);
}
DIRECTIVE is as for output_section_asm_op. */
static void
-output_objc_section_asm_op (const void *directive)
+output_objc_section_asm_op (const char *directive)
{
static bool been_here = false;
to the default text subspace. */
static void
-som_output_text_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+som_output_text_section_asm_op (const char *data ATTRIBUTE_UNUSED)
{
gcc_assert (TARGET_SOM);
if (TARGET_GAS)
sections. This function is only used with SOM. */
static void
-som_output_comdat_data_section_asm_op (const void *data)
+som_output_comdat_data_section_asm_op (const char *data)
{
in_section = NULL;
output_section_asm_op (data);
/* A get_unnamed_section callback, used for switching to toc_section. */
static void
-rs6000_elf_output_toc_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+rs6000_elf_output_toc_section_asm_op (const char *data ATTRIBUTE_UNUSED)
{
if ((DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_ELFv2)
&& TARGET_MINIMAL_TOC)
points to the section string variable. */
static void
-rs6000_xcoff_output_readonly_section_asm_op (const void *directive)
+rs6000_xcoff_output_readonly_section_asm_op (const char *directive)
{
fprintf (asm_out_file, "\t.csect %s[RO],%s\n",
- *(const char *const *) directive,
+ directive
+ ? xcoff_private_rodata_section_name
+ : xcoff_read_only_section_name,
XCOFF_CSECT_DEFAULT_ALIGNMENT_STR);
}
/* Likewise for read-write sections. */
static void
-rs6000_xcoff_output_readwrite_section_asm_op (const void *directive)
+rs6000_xcoff_output_readwrite_section_asm_op (const char *)
{
fprintf (asm_out_file, "\t.csect %s[RW],%s\n",
- *(const char *const *) directive,
+ xcoff_private_data_section_name,
XCOFF_CSECT_DEFAULT_ALIGNMENT_STR);
}
static void
-rs6000_xcoff_output_tls_section_asm_op (const void *directive)
+rs6000_xcoff_output_tls_section_asm_op (const char *directive)
{
fprintf (asm_out_file, "\t.csect %s[TL],%s\n",
- *(const char *const *) directive,
+ directive
+ ? xcoff_private_data_section_name
+ : xcoff_tls_data_section_name,
XCOFF_CSECT_DEFAULT_ALIGNMENT_STR);
}
/* A get_unnamed_section callback, used for switching to toc_section. */
static void
-rs6000_xcoff_output_toc_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+rs6000_xcoff_output_toc_section_asm_op (const char *data ATTRIBUTE_UNUSED)
{
if (TARGET_MINIMAL_TOC)
{
{
read_only_data_section
= get_unnamed_section (0, rs6000_xcoff_output_readonly_section_asm_op,
- &xcoff_read_only_section_name);
+ NULL);
private_data_section
= get_unnamed_section (SECTION_WRITE,
rs6000_xcoff_output_readwrite_section_asm_op,
- &xcoff_private_data_section_name);
+ NULL);
read_only_private_data_section
= get_unnamed_section (0, rs6000_xcoff_output_readonly_section_asm_op,
- &xcoff_private_rodata_section_name);
+ "");
tls_data_section
= get_unnamed_section (SECTION_TLS,
rs6000_xcoff_output_tls_section_asm_op,
- &xcoff_tls_data_section_name);
+ NULL);
tls_private_data_section
= get_unnamed_section (SECTION_TLS,
rs6000_xcoff_output_tls_section_asm_op,
- &xcoff_private_data_section_name);
+ "");
toc_section
= get_unnamed_section (0, rs6000_xcoff_output_toc_section_asm_op, NULL);
This is somewhat dangerous; the only safe use is in a union when one
field really isn't ever used.
+@findex callback
+@item callback
+
+@code{callback} should be applied to fields with pointer to function type
+and causes the field to be ignored similarly to @code{skip}, except when
+writing PCH and the field is non-NULL it will remember the field's address
+for relocation purposes if the process writing PCH has different load base
+from a process reading PCH.
+
@findex for_user
@item for_user
case TYPE_STRING:
case TYPE_POINTER:
case TYPE_ARRAY:
+ case TYPE_CALLBACK:
return NULL;
default:
gcc_unreachable ();
void write_state_version (const char *version);
void write_state_scalar_type (type_p current);
void write_state_string_type (type_p current);
+ void write_state_callback_type (type_p current);
void write_state_undefined_type (type_p current);
void write_state_struct_union_type (type_p current, const char *kindstr);
void write_state_struct_type (type_p current);
fatal ("Unexpected type in write_state_string_type");
}
+/* Write the callback type. There is only one such thing! */
+void
+state_writer::write_state_callback_type (type_p current)
+{
+ if (current == &callback_type)
+ {
+ write_any_indent (0);
+ fprintf (state_file, "callback ");
+ write_state_common_type_content (current);
+ }
+ else
+ fatal ("Unexpected type in write_state_callback_type");
+}
+
/* Write an undefined type. */
void
state_writer::write_state_undefined_type (type_p current)
case TYPE_STRING:
write_state_string_type (current);
break;
+ case TYPE_CALLBACK:
+ write_state_callback_type (current);
+ break;
}
}
read_state_common_type_content (*type);
}
+/* Read the callback_type. */
+static void
+read_state_callback_type (type_p *type)
+{
+ *type = &callback_type;
+ read_state_common_type_content (*type);
+}
+
/* Read a lang_bitmap representing a set of GCC front-end languages. */
static void
next_state_tokens (1);
read_state_string_type (current);
}
+ else if (state_token_is_name (t0, "callback"))
+ {
+ next_state_tokens (1);
+ read_state_callback_type (current);
+ }
else if (state_token_is_name (t0, "undefined"))
{
*current = XCNEW (struct type);
int nb_struct = 0, nb_union = 0, nb_array = 0, nb_pointer = 0;
int nb_lang_struct = 0;
int nb_user_struct = 0, nb_undefined = 0;
+ int nb_callback = 0;
type_p p = NULL;
for (p = t; p; p = p->next)
{
case TYPE_ARRAY:
nb_array++;
break;
+ case TYPE_CALLBACK:
+ nb_callback++;
+ break;
case TYPE_LANG_STRUCT:
nb_lang_struct++;
break;
fprintf (stderr, "@@%%@@ %d structs, %d unions\n", nb_struct, nb_union);
if (nb_pointer > 0 || nb_array > 0)
fprintf (stderr, "@@%%@@ %d pointers, %d arrays\n", nb_pointer, nb_array);
+ if (nb_callback > 0)
+ fprintf (stderr, "@@%%@@ %d callbacks\n", nb_callback);
if (nb_lang_struct > 0)
fprintf (stderr, "@@%%@@ %d lang_structs\n", nb_lang_struct);
if (nb_user_struct > 0)
TYPE_SCALAR, 0, 0, 0, GC_USED, {0}
};
+struct type callback_type = {
+ TYPE_CALLBACK, 0, 0, 0, GC_USED, {0}
+};
+
/* Lists of various things. */
pair_p typedefs = NULL;
static void
process_gc_options (options_p opt, enum gc_used_enum level, int *maybe_undef,
- int *length, int *skip, type_p *nested_ptr)
+ int *length, int *skip, int *callback, type_p *nested_ptr)
{
options_p o;
for (o = opt; o; o = o->next)
*length = 1;
else if (strcmp (o->name, "skip") == 0)
*skip = 1;
+ else if (strcmp (o->name, "callback") == 0)
+ *callback = 1;
else if (strcmp (o->name, "nested_ptr") == 0
&& o->kind == OPTION_NESTED)
*nested_ptr = ((const struct nested_ptr_data *) o->info.nested)->type;
type_p dummy2;
bool allow_undefined_field_types = (t->kind == TYPE_USER_STRUCT);
- process_gc_options (t->u.s.opt, level, &dummy, &dummy, &dummy,
+ process_gc_options (t->u.s.opt, level, &dummy, &dummy, &dummy, &dummy,
&dummy2);
if (t->u.s.base_class)
int maybe_undef = 0;
int length = 0;
int skip = 0;
+ int callback = 0;
type_p nested_ptr = NULL;
process_gc_options (f->opt, level, &maybe_undef, &length, &skip,
- &nested_ptr);
+ &callback, &nested_ptr);
if (nested_ptr && f->type->kind == TYPE_POINTER)
set_gc_used_type (nested_ptr, GC_POINTED_TO);
set_gc_used_type (f->type->u.p, GC_MAYBE_POINTED_TO);
else if (skip)
; /* target type is not used through this field */
+ else if (callback)
+ f->type = &callback_type;
else
set_gc_used_type (f->type, GC_USED, allow_undefined_field_types);
}
{
case TYPE_NONE:
case TYPE_UNDEFINED:
+ case TYPE_CALLBACK:
gcc_unreachable ();
break;
case TYPE_POINTER:
;
else if (strcmp (oo->name, "for_user") == 0)
;
+ else if (strcmp (oo->name, "callback") == 0)
+ ;
else
error_at_line (d->line, "unknown option `%s'\n", oo->name);
{
case TYPE_SCALAR:
case TYPE_STRING:
+ case TYPE_CALLBACK:
d->process_field (t, d);
break;
break;
case TYPE_SCALAR:
+ case TYPE_CALLBACK:
break;
case TYPE_ARRAY:
break;
case TYPE_SCALAR:
+ case TYPE_CALLBACK:
break;
case TYPE_ARRAY:
case TYPE_SCALAR:
break;
+ case TYPE_CALLBACK:
+ oprintf (d->of, "%*sif ((void *)(%s) == this_obj)\n", d->indent, "",
+ d->prev_val[3]);
+ oprintf (d->of, "%*s gt_pch_note_callback (&(%s), this_obj);\n",
+ d->indent, "", d->val);
+ break;
+
case TYPE_ARRAY:
case TYPE_NONE:
case TYPE_UNDEFINED:
case TYPE_UNDEFINED:
case TYPE_UNION:
case TYPE_LANG_STRUCT:
+ case TYPE_CALLBACK:
error_at_line (line, "global `%s' is unimplemented type", name);
}
}
case TYPE_ARRAY:
printf ("TYPE_ARRAY");
break;
+ case TYPE_CALLBACK:
+ printf ("TYPE_CALLBACK");
+ break;
case TYPE_LANG_STRUCT:
printf ("TYPE_LANG_STRUCT");
break;
t->u.scalar_is_char ? "true" : "false");
break;
case TYPE_STRING:
+ case TYPE_CALLBACK:
break;
case TYPE_STRUCT:
case TYPE_UNION:
TYPE_UNION, /* Type for GTY-ed discriminated unions. */
TYPE_POINTER, /* Pointer type to GTY-ed type. */
TYPE_ARRAY, /* Array of GTY-ed types. */
+ TYPE_CALLBACK, /* A function pointer that needs relocation if
+ the executable has been loaded at a different
+ address. */
TYPE_LANG_STRUCT, /* GCC front-end language specific structs.
Various languages may have homonymous but
different structs. */
extern struct type scalar_nonchar;
extern struct type scalar_char;
+/* The one and only TYPE_CALLBACK. */
+extern struct type callback_type;
+
/* Test if a type is a union, either a plain one or a language
specific one. */
#define UNION_P(x) \
}
static hash_table<saving_hasher> *saving_htab;
+static vec<void *> callback_vec;
/* Register an object in the hash table. */
return 1;
}
+/* Register address of a callback pointer. */
+void
+gt_pch_note_callback (void *obj, void *base)
+{
+ void *ptr;
+ memcpy (&ptr, obj, sizeof (void *));
+ if (ptr != NULL)
+ {
+ struct ptr_data *data
+ = (struct ptr_data *)
+ saving_htab->find_with_hash (base, POINTER_HASH (base));
+ gcc_assert (data);
+ callback_vec.safe_push ((char *) data->new_addr
+ + ((char *) obj - (char *) base));
+ }
+}
+
/* Register an object in the hash table. */
void
ggc_pch_finish (state.d, state.f);
gt_pch_fixup_stringpool ();
+ unsigned num_callbacks = callback_vec.length ();
+ void (*pch_save) (FILE *) = >_pch_save;
+ if (fwrite (&pch_save, sizeof (pch_save), 1, f) != 1
+ || fwrite (&num_callbacks, sizeof (num_callbacks), 1, f) != 1
+ || (num_callbacks
+ && fwrite (callback_vec.address (), sizeof (void *), num_callbacks,
+ f) != num_callbacks))
+ fatal_error (input_location, "cannot write PCH file: %m");
+
XDELETE (state.ptrs);
XDELETE (this_object);
delete saving_htab;
saving_htab = NULL;
+ callback_vec.release ();
}
/* Read the state of the compiler back in from F. */
gt_pch_restore_stringpool ();
+ void (*pch_save) (FILE *);
+ unsigned num_callbacks;
+ if (fread (&pch_save, sizeof (pch_save), 1, f) != 1
+ || fread (&num_callbacks, sizeof (num_callbacks), 1, f) != 1)
+ fatal_error (input_location, "cannot read PCH file: %m");
+ if (pch_save != >_pch_save)
+ {
+ uintptr_t bias = (uintptr_t) >_pch_save - (uintptr_t) pch_save;
+ void **ptrs = XNEWVEC (void *, num_callbacks);
+ unsigned i;
+
+ if (fread (ptrs, sizeof (void *), num_callbacks, f) != num_callbacks)
+ fatal_error (input_location, "cannot read PCH file: %m");
+ for (i = 0; i < num_callbacks; ++i)
+ {
+ memcpy (&pch_save, ptrs[i], sizeof (pch_save));
+ pch_save = (void (*) (FILE *)) ((uintptr_t) pch_save + bias);
+ memcpy (ptrs[i], &pch_save, sizeof (pch_save));
+ }
+ XDELETE (ptrs);
+ }
+ else if (fseek (f, num_callbacks * sizeof (void *), SEEK_CUR) != 0)
+ fatal_error (input_location, "cannot read PCH file: %m");
+
/* Barring corruption of the PCH file, the restored line table should be
complete and usable. */
line_table = new_line_table;
/* Used by the gt_pch_n_* routines. Register an object in the hash table. */
extern int gt_pch_note_object (void *, void *, gt_note_pointers);
+/* Used by the gt_pch_p_* routines. Register address of a callback
+ pointer. */
+extern void gt_pch_note_callback (void *, void *);
+
/* Used by the gt_pch_n_* routines. Register that an object has a reorder
function. */
extern void gt_pch_note_reorder (void *, void *, gt_handle_reorder);
/* A callback that writes the assembly code for switching to an unnamed
section. The argument provides callback-specific data. */
-typedef void (*unnamed_section_callback) (const void *);
+typedef void (*unnamed_section_callback) (const char *);
/* Information about a SECTION_UNNAMED section. */
struct GTY(()) unnamed_section {
/* The callback used to switch to the section, and the data that
should be passed to the callback. */
- unnamed_section_callback GTY ((skip)) callback;
- const void *GTY ((skip)) data;
+ unnamed_section_callback GTY ((callback)) callback;
+ const char *data;
/* The next entry in the chain of unnamed sections. */
section *next;
struct section_common common;
/* The callback used to assemble decls in this section. */
- noswitch_section_callback GTY ((skip)) callback;
+ noswitch_section_callback GTY ((callback)) callback;
};
/* Information about a section, which may be named or unnamed. */
extern GTY(()) section *in_section;
extern GTY(()) bool in_cold_section_p;
-extern section *get_unnamed_section (unsigned int, void (*) (const void *),
- const void *);
+extern section *get_unnamed_section (unsigned int, void (*) (const char *),
+ const char *);
extern section *get_section (const char *, unsigned int, tree,
bool not_existing = false);
extern section *get_named_section (tree, const char *, int);
extern bool unlikely_text_section_p (section *);
extern void switch_to_section (section *, tree = nullptr);
-extern void output_section_asm_op (const void *);
+extern void output_section_asm_op (const char *);
extern void record_tm_clone_pair (tree, tree);
extern void finish_tm_clone_pairs (void);
struct GTY(()) tree_translation_unit_decl {
struct tree_decl_common common;
/* Source language of this translation unit. Used for DWARF output. */
- const char * GTY((skip(""))) language;
+ const char *language;
/* TODO: Non-optimization used to build this translation unit. */
/* TODO: Root of a partial DWARF tree for global types and decls. */
};
/* Return a new unnamed section with the given fields. */
section *
-get_unnamed_section (unsigned int flags, void (*callback) (const void *),
- const void *data)
+get_unnamed_section (unsigned int flags, void (*callback) (const char *),
+ const char *data)
{
section *sect;
a get_unnamed_section callback. */
void
-output_section_asm_op (const void *directive)
+output_section_asm_op (const char *directive)
{
- fprintf (asm_out_file, "%s\n", (const char *) directive);
+ fprintf (asm_out_file, "%s\n", directive);
}
/* Emit assembly code to switch to section NEW_SECTION. Do nothing if
unsigned int max_column_hint;
/* The allocator to use when resizing 'maps', defaults to xrealloc. */
- line_map_realloc reallocator;
+ line_map_realloc GTY((callback)) reallocator;
/* The allocators' function used to know the actual size it
allocated, for a certain allocation size requested. */
- line_map_round_alloc_size_func round_alloc_size;
+ line_map_round_alloc_size_func GTY((callback)) round_alloc_size;
struct location_adhoc_data_map location_adhoc_data_map;
projects / thirdparty / gcc.git / commitdiff
