X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fgdb_bfd.h;h=87b48f51f7c3c6e9832df51e7a979a2e14dc2b0f;hb=b9a3f8429b012b753e30a4222bd8e4cbba019fad;hp=ca2eddc142096f82efc735a172a406b5ce4bddfe;hpb=65cf3563597713173bb688287a21666ec66e722d;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/gdb_bfd.h b/gdb/gdb_bfd.h index ca2eddc142..87b48f51f7 100644 --- a/gdb/gdb_bfd.h +++ b/gdb/gdb_bfd.h @@ -1,6 +1,6 @@ /* Definitions for BFD wrappers used by GDB. - Copyright (C) 2011-2013 Free Software Foundation, Inc. + Copyright (C) 2011-2019 Free Software Foundation, Inc. This file is part of GDB. @@ -21,22 +21,24 @@ #define GDB_BFD_H #include "registry.h" +#include "common/gdb_ref_ptr.h" DECLARE_REGISTRY (bfd); -/* Make a copy ABFD's filename using bfd_alloc, and reassign it to the - BFD. This ensures that the BFD's filename has the same lifetime as - the BFD itself. */ +/* If supplied a path starting with this sequence, gdb_bfd_open will + open BFDs using target fileio operations. */ -void gdb_bfd_stash_filename (struct bfd *abfd); +#define TARGET_SYSROOT_PREFIX "target:" -/* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen. - Returns NULL on error. On success, returns a new reference to the - BFD, which must be freed with gdb_bfd_unref. BFDs returned by this - call are shared among all callers opening the same file. If FD is - not -1, then after this call it is owned by BFD. */ +/* Returns nonzero if NAME starts with TARGET_SYSROOT_PREFIX, zero + otherwise. */ + +int is_target_filename (const char *name); + +/* Returns nonzero if the filename associated with ABFD starts with + TARGET_SYSROOT_PREFIX, zero otherwise. */ -struct bfd *gdb_bfd_open (const char *name, const char *target, int fd); +int gdb_bfd_has_target_filename (struct bfd *abfd); /* Increment the reference count of ABFD. It is fine for ABFD to be NULL; in this case the function does nothing. */ @@ -49,6 +51,36 @@ void gdb_bfd_ref (struct bfd *abfd); void gdb_bfd_unref (struct bfd *abfd); +/* A policy class for gdb::ref_ptr for BFD reference counting. */ +struct gdb_bfd_ref_policy +{ + static void incref (struct bfd *abfd) + { + gdb_bfd_ref (abfd); + } + + static void decref (struct bfd *abfd) + { + gdb_bfd_unref (abfd); + } +}; + +/* A gdb::ref_ptr that has been specialized for BFD objects. */ +typedef gdb::ref_ptr gdb_bfd_ref_ptr; + +/* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen. + If NAME starts with TARGET_SYSROOT_PREFIX then the BFD will be + opened using target fileio operations if necessary. Returns NULL + on error. On success, returns a new reference to the BFD. BFDs + returned by this call are shared among all callers opening the same + file. If FD is not -1, then after this call it is owned by BFD. + If the BFD was not accessed using target fileio operations then the + filename associated with the BFD and accessible with + bfd_get_filename will not be exactly NAME but rather NAME with + TARGET_SYSROOT_PREFIX stripped. */ + +gdb_bfd_ref_ptr gdb_bfd_open (const char *name, const char *target, int fd); + /* Mark the CHILD BFD as being a member of PARENT. Also, increment the reference count of CHILD. Calling this function ensures that as along as CHILD remains alive, PARENT will as well. Both CHILD @@ -58,15 +90,28 @@ void gdb_bfd_unref (struct bfd *abfd); void gdb_bfd_mark_parent (bfd *child, bfd *parent); -/* Try to read or map the contents of the section SECT. If - successful, the section data is returned and *SIZE is set to the - size of the section data; this may not be the same as the size - according to bfd_get_section_size if the section was compressed. - The returned section data is associated with the BFD and will be - destroyed when the BFD is destroyed. There is no other way to free - it; for temporary uses of section data, see - bfd_malloc_and_get_section. SECT may not have relocations. This - function will throw on error. */ +/* Mark INCLUDEE as being included by INCLUDER. + This is used to associate the life time of INCLUDEE with INCLUDER. + For example, with Fission, one file can refer to debug info in another + file, and internal tables we build for the main file (INCLUDER) may refer + to data contained in INCLUDEE. Therefore we want to keep INCLUDEE around + at least as long as INCLUDER exists. + + Note that this is different than gdb_bfd_mark_parent because in our case + lifetime tracking is based on the "parent" whereas in gdb_bfd_mark_parent + lifetime tracking is based on the "child". Plus in our case INCLUDEE could + have multiple different "parents". */ + +void gdb_bfd_record_inclusion (bfd *includer, bfd *includee); + +/* Try to read or map the contents of the section SECT. If successful, the + section data is returned and *SIZE is set to the size of the section data; + this may not be the same as the size according to bfd_get_section_size if the + section was compressed. The returned section data is associated with the BFD + and will be destroyed when the BFD is destroyed. There is no other way to + free it; for temporary uses of section data, see bfd_malloc_and_get_section. + SECT may not have relocations. If there is an error reading the section, + this issues a warning, sets *SIZE to 0, and returns NULL. */ const gdb_byte *gdb_bfd_map_section (asection *section, bfd_size_type *size); @@ -79,47 +124,43 @@ int gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out); /* A wrapper for bfd_fopen that initializes the gdb-specific reference - count and calls gdb_bfd_stash_filename. */ + count. */ -bfd *gdb_bfd_fopen (const char *, const char *, const char *, int); +gdb_bfd_ref_ptr gdb_bfd_fopen (const char *, const char *, const char *, int); /* A wrapper for bfd_openr that initializes the gdb-specific reference - count and calls gdb_bfd_stash_filename. */ + count. */ -bfd *gdb_bfd_openr (const char *, const char *); +gdb_bfd_ref_ptr gdb_bfd_openr (const char *, const char *); /* A wrapper for bfd_openw that initializes the gdb-specific reference - count and calls gdb_bfd_stash_filename. */ + count. */ -bfd *gdb_bfd_openw (const char *, const char *); +gdb_bfd_ref_ptr gdb_bfd_openw (const char *, const char *); /* A wrapper for bfd_openr_iovec that initializes the gdb-specific - reference count and calls gdb_bfd_stash_filename. */ - -bfd *gdb_bfd_openr_iovec (const char *filename, const char *target, - void *(*open_func) (struct bfd *nbfd, - void *open_closure), - void *open_closure, - file_ptr (*pread_func) (struct bfd *nbfd, - void *stream, - void *buf, - file_ptr nbytes, - file_ptr offset), - int (*close_func) (struct bfd *nbfd, - void *stream), - int (*stat_func) (struct bfd *abfd, - void *stream, - struct stat *sb)); + reference count. */ + +gdb_bfd_ref_ptr gdb_bfd_openr_iovec (const char *filename, const char *target, + void *(*open_func) (struct bfd *nbfd, + void *open_closure), + void *open_closure, + file_ptr (*pread_func) (struct bfd *nbfd, + void *stream, + void *buf, + file_ptr nbytes, + file_ptr offset), + int (*close_func) (struct bfd *nbfd, + void *stream), + int (*stat_func) (struct bfd *abfd, + void *stream, + struct stat *sb)); /* A wrapper for bfd_openr_next_archived_file that initializes the - gdb-specific reference count and calls gdb_bfd_stash_filename. */ - -bfd *gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous); + gdb-specific reference count. */ -/* A wrapper for bfd_fdopenr that initializes the gdb-specific - reference count and calls gdb_bfd_stash_filename. */ +gdb_bfd_ref_ptr gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous); -bfd *gdb_bfd_fdopenr (const char *filename, const char *target, int fd); @@ -135,4 +176,9 @@ int gdb_bfd_section_index (bfd *abfd, asection *section); int gdb_bfd_count_sections (bfd *abfd); +/* Return true if any section requires relocations, false + otherwise. */ + +int gdb_bfd_requires_relocations (bfd *abfd); + #endif /* GDB_BFD_H */