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17eaa7a610
These functions have some transfer semantics, so even though they are private API, make sure that we document it for the future.
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/* sysprof-memory-map.c
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*
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* Copyright 2023 Christian Hergert <chergert@redhat.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "config.h"
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#include <stdlib.h>
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#include "sysprof-memory-map-private.h"
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struct _SysprofMemoryMap
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{
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GObject parent_instance;
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GPtrArray *mapped_files;
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};
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G_DEFINE_FINAL_TYPE (SysprofMemoryMap, sysprof_memory_map, G_TYPE_OBJECT)
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static void
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sysprof_memory_map_finalize (GObject *object)
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{
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SysprofMemoryMap *self = (SysprofMemoryMap *)object;
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g_clear_pointer (&self->mapped_files, g_ptr_array_unref);
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G_OBJECT_CLASS (sysprof_memory_map_parent_class)->finalize (object);
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}
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static void
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sysprof_memory_map_class_init (SysprofMemoryMapClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = sysprof_memory_map_finalize;
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}
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static void
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sysprof_memory_map_init (SysprofMemoryMap *self)
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{
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self->mapped_files = g_ptr_array_new_with_free_func (g_object_unref);
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}
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static int
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mapped_file_compare (gconstpointer aptr,
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gconstpointer bptr)
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{
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SysprofMappedFile * const *a = aptr;
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SysprofMappedFile * const *b = bptr;
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guint64 aaddr = sysprof_mapped_file_get_address (*a);
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guint64 baddr = sysprof_mapped_file_get_address (*b);
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if (aaddr < baddr)
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return -1;
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else if (aaddr > baddr)
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return 1;
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else
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return 0;
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}
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static int
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mapped_file_bsearch (gconstpointer keyptr,
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gconstpointer elemptr)
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{
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guint64 address = *(const guint64 *)keyptr;
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SysprofMappedFile *mapped_file = *(SysprofMappedFile * const *)elemptr;
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guint64 begin = sysprof_mapped_file_get_address (mapped_file);
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guint64 length = sysprof_mapped_file_get_length (mapped_file);
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if (address < begin)
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return -1;
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if (address >= begin + length)
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return 1;
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return 0;
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}
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/**
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* sysprof_memory_map_new:
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* @mapped_files: (transfer full): a #GPtrArray of #SysprofMappedFile
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*
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* Creates a new #SysprofMemoryMap that can be used to locate a mapped
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* file which contains a particular address within a target process.
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*
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* You should use SysprofMemoryMapBuilder instead of this function.
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*
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* Returns: (transfer full): a #SysprofMemoryMap
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*/
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SysprofMemoryMap *
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sysprof_memory_map_new (GPtrArray *mapped_files)
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{
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SysprofMemoryMap *self;
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g_return_val_if_fail (mapped_files != NULL, NULL);
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g_ptr_array_set_free_func (mapped_files, g_object_unref);
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g_ptr_array_sort (mapped_files, mapped_file_compare);
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self = g_object_new (SYSPROF_TYPE_MEMORY_MAP, NULL);
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self->mapped_files = mapped_files;
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return self;
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}
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/**
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* sysprof_memory_map_find_at_address:
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* @self: a #SysprofMemoryMap
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* @address: an address
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*
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* Attempts to locate the #SysprofMappedFile which contains @address.
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*
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* Returns: (transfer none) (nullable): a #SysprofMappedFile if there
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* was a mapping containing @address, otherwise %NULL.
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*/
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SysprofMappedFile *
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sysprof_memory_map_find_at_address (SysprofMemoryMap *self,
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guint64 address)
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{
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SysprofMappedFile **match;
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g_return_val_if_fail (SYSPROF_IS_MEMORY_MAP (self), NULL);
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match = bsearch (&address,
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(gpointer)self->mapped_files->pdata,
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self->mapped_files->len,
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sizeof (gpointer),
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mapped_file_bsearch);
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return match ? *match : NULL;
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}
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