From 0589ca4e7ba9b8d60599706b57be22c007c1f4fa Mon Sep 17 00:00:00 2001 From: Tom Tromey Date: Tue, 21 Dec 2021 16:48:38 -0700 Subject: Introduce gdb-hashtab module in gdbsupport gdb has some extensions and helpers for working with the libiberty hash table. This patch consolidates these and moves them to gdbsupport. --- gdbsupport/Makefile.am | 1 + gdbsupport/Makefile.in | 20 ++++++++++--------- gdbsupport/gdb-hashtab.cc | 44 +++++++++++++++++++++++++++++++++++++++++ gdbsupport/gdb-hashtab.h | 50 +++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 106 insertions(+), 9 deletions(-) create mode 100644 gdbsupport/gdb-hashtab.cc create mode 100644 gdbsupport/gdb-hashtab.h (limited to 'gdbsupport') diff --git a/gdbsupport/Makefile.am b/gdbsupport/Makefile.am index 73d4149..9e43348 100644 --- a/gdbsupport/Makefile.am +++ b/gdbsupport/Makefile.am @@ -52,6 +52,7 @@ libgdbsupport_a_SOURCES = \ filestuff.cc \ format.cc \ gdb-dlfcn.cc \ + gdb-hashtab.cc \ gdb_obstack.cc \ gdb_tilde_expand.cc \ gdb_wait.cc \ diff --git a/gdbsupport/Makefile.in b/gdbsupport/Makefile.in index 88d3dd1..59e1dfe 100644 --- a/gdbsupport/Makefile.in +++ b/gdbsupport/Makefile.in @@ -151,15 +151,15 @@ am_libgdbsupport_a_OBJECTS = agent.$(OBJEXT) btrace-common.$(OBJEXT) \ common-regcache.$(OBJEXT) common-utils.$(OBJEXT) \ environ.$(OBJEXT) errors.$(OBJEXT) event-loop.$(OBJEXT) \ fileio.$(OBJEXT) filestuff.$(OBJEXT) format.$(OBJEXT) \ - gdb-dlfcn.$(OBJEXT) gdb_obstack.$(OBJEXT) \ - gdb_tilde_expand.$(OBJEXT) gdb_wait.$(OBJEXT) \ - gdb_vecs.$(OBJEXT) job-control.$(OBJEXT) netstuff.$(OBJEXT) \ - new-op.$(OBJEXT) pathstuff.$(OBJEXT) print-utils.$(OBJEXT) \ - ptid.$(OBJEXT) rsp-low.$(OBJEXT) run-time-clock.$(OBJEXT) \ - safe-strerror.$(OBJEXT) scoped_mmap.$(OBJEXT) search.$(OBJEXT) \ - signals.$(OBJEXT) signals-state-save-restore.$(OBJEXT) \ - tdesc.$(OBJEXT) thread-pool.$(OBJEXT) xml-utils.$(OBJEXT) \ - $(am__objects_1) + gdb-dlfcn.$(OBJEXT) gdb-hashtab.$(OBJEXT) \ + gdb_obstack.$(OBJEXT) gdb_tilde_expand.$(OBJEXT) \ + gdb_wait.$(OBJEXT) gdb_vecs.$(OBJEXT) job-control.$(OBJEXT) \ + netstuff.$(OBJEXT) new-op.$(OBJEXT) pathstuff.$(OBJEXT) \ + print-utils.$(OBJEXT) ptid.$(OBJEXT) rsp-low.$(OBJEXT) \ + run-time-clock.$(OBJEXT) safe-strerror.$(OBJEXT) \ + scoped_mmap.$(OBJEXT) search.$(OBJEXT) signals.$(OBJEXT) \ + signals-state-save-restore.$(OBJEXT) tdesc.$(OBJEXT) \ + thread-pool.$(OBJEXT) xml-utils.$(OBJEXT) $(am__objects_1) libgdbsupport_a_OBJECTS = $(am_libgdbsupport_a_OBJECTS) AM_V_P = $(am__v_P_@AM_V@) am__v_P_ = $(am__v_P_@AM_DEFAULT_V@) @@ -377,6 +377,7 @@ libgdbsupport_a_SOURCES = \ filestuff.cc \ format.cc \ gdb-dlfcn.cc \ + gdb-hashtab.cc \ gdb_obstack.cc \ gdb_tilde_expand.cc \ gdb_wait.cc \ @@ -483,6 +484,7 @@ distclean-compile: @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/filestuff.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/format.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gdb-dlfcn.Po@am__quote@ +@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gdb-hashtab.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gdb_obstack.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gdb_tilde_expand.Po@am__quote@ @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/gdb_vecs.Po@am__quote@ diff --git a/gdbsupport/gdb-hashtab.cc b/gdbsupport/gdb-hashtab.cc new file mode 100644 index 0000000..c42e8fe --- /dev/null +++ b/gdbsupport/gdb-hashtab.cc @@ -0,0 +1,44 @@ +/* Hash table wrappers for gdb. + Copyright (C) 2021 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#include "common-defs.h" +#include "gdb-hashtab.h" + +/* Allocation function for the libiberty hash table which uses an + obstack. The obstack is passed as DATA. */ + +void * +hashtab_obstack_allocate (void *data, size_t size, size_t count) +{ + size_t total = size * count; + void *ptr = obstack_alloc ((struct obstack *) data, total); + + memset (ptr, 0, total); + return ptr; +} + +/* Trivial deallocation function for the libiberty splay tree and hash + table - don't deallocate anything. Rely on later deletion of the + obstack. DATA will be the obstack, although it is not needed + here. */ + +void +dummy_obstack_deallocate (void *object, void *data) +{ + return; +} diff --git a/gdbsupport/gdb-hashtab.h b/gdbsupport/gdb-hashtab.h new file mode 100644 index 0000000..65c2dc5 --- /dev/null +++ b/gdbsupport/gdb-hashtab.h @@ -0,0 +1,50 @@ +/* Hash table wrappers for gdb. + Copyright (C) 2021 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +#ifndef GDBSUPPORT_GDB_HASHTAB_H +#define GDBSUPPORT_GDB_HASHTAB_H + +#include "hashtab.h" + +/* A deleter for a hash table. */ +struct htab_deleter +{ + void operator() (htab *ptr) const + { + htab_delete (ptr); + } +}; + +/* A unique_ptr wrapper for htab_t. */ +typedef std::unique_ptr htab_up; + +/* A wrapper for 'delete' that can used as a hash table entry deletion + function. */ +template +void +htab_delete_entry (void *ptr) +{ + delete (T *) ptr; +} + +/* Allocation and deallocation functions for the libiberty hash table + which use obstacks. */ +void *hashtab_obstack_allocate (void *data, size_t size, size_t count); +void dummy_obstack_deallocate (void *object, void *data); + +#endif /* GDBSUPPORT_GDB_HASHTAB_H */ -- cgit v1.1