tree-object-size.h File Reference

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Enumerations
enum	{ OST_SUBOBJECT = 1 , OST_MINIMUM = 2 , OST_DYNAMIC = 4 , OST_END = 8 }

Functions
void	init_object_sizes (void)
void	fini_object_sizes (void)
bool	compute_builtin_object_size (tree, int, tree *)
tree	decl_init_size (tree, bool)

Enumeration Type Documentation

anonymous enum

anonymous enum

Declarations for tree-object-size.cc.
   Copyright (C) 2013-2024 Free Software Foundation, Inc.

This file is part of GCC.

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Bits in object_size_type.   

Enumerator
OST_SUBOBJECT
OST_MINIMUM
OST_DYNAMIC
OST_END

Function Documentation

compute_builtin_object_size()

bool compute_builtin_object_size ( tree ptr, int object_size_type, tree * psize )

extern

Compute __builtin_object_size value for PTR and set *PSIZE to
the resulting value.  If the declared object is known and PDECL
is nonnull, sets *PDECL to the object's DECL.  OBJECT_SIZE_TYPE
is the second argument   to __builtin_object_size.
Returns true on success and false when the object size could not
be determined.   

References addr_object_size(), BITMAP_ALLOC, bitmap_bit_p, bitmap_clear(), bitmap_copy(), bitmap_empty_p(), BITMAP_FREE, bitmap_set_bit, check_for_plus_in_loops(), collect_object_sizes_for(), compare_tree_int(), compute_builtin_object_size(), computed, dump_file, dump_flags, EXECUTE_IF_SET_IN_BITMAP, free(), gcc_assert, ggc_alloc(), gimple_assign_rhs1(), gimple_assign_rhs2(), gimple_assign_rhs_code(), gimplify_size_expressions(), i, init_offset_limit(), NULL, num_ssa_names, object_size_info::object_size_type, object_sizes_get(), object_sizes_grow(), object_sizes_unknown_p(), offset, offset_limit, OST_DYNAMIC, OST_END, OST_MINIMUM, OST_SUBOBJECT, POINTER_TYPE_P, print_generic_expr(), object_size_info::reexamine, size_for_offset(), size_unknown(), size_unknown_p(), ssa_name, SSA_NAME_DEF_STMT, SSA_NAME_VERSION, TDF_DETAILS, TREE_CODE, tree_fits_shwi_p(), and TREE_TYPE.

Referenced by addr_object_size(), compute_builtin_object_size(), early_object_sizes_execute_one(), fold_builtin_object_size(), gimple_fold_builtin_strncat(), instrument_object_size(), and strdup_object_size().

decl_init_size()

tree decl_init_size ( tree decl, bool min )

extern

Returns the size of the object designated by DECL considering its
initializer if it either has one or if it would not affect its size,
otherwise the size of the object without the initializer when MIN
is true, else null.  An object's initializer affects the object's
size if it's a struct type with a flexible array member.   

References build3(), byte_position(), component_ref_size(), DECL_SIZE_UNIT, fold_build2, ggc_alloc(), last, last_field(), NULL_TREE, TREE_CODE, TREE_TYPE, TYPE_SIZE, and TYPE_SIZE_UNIT.

Referenced by addr_object_size(), and handle_decl().

fini_object_sizes()

void fini_object_sizes ( void )

extern

Destroy data structures after the object size computation.   

References BITMAP_FREE, computed, object_size_info::object_size_type, object_sizes_release(), and OST_END.

Referenced by object_sizes_execute().

init_object_sizes()

void init_object_sizes ( void )

extern

Initialize data structures for the object size computation.   

References BITMAP_ALLOC, computed, init_offset_limit(), NULL, object_size_info::object_size_type, object_sizes_grow(), and OST_END.

Referenced by object_sizes_execute().