mirror of
https://github.com/varun-r-mallya/sysprof.git
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b3a4c295c3
This relies on begin/end range for the symbols to create something akin to an interval tree, albeit with GSequence. If performance needs to be addressed, can probably augment SysprofSymbol for an interval rbtree.
141 lines
3.5 KiB
C
141 lines
3.5 KiB
C
/* sysprof-symbol-cache.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 "sysprof-symbol-private.h"
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#include "sysprof-symbol-cache-private.h"
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struct _SysprofSymbolCache
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{
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GObject parent_instance;
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GSequence *symbols;
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};
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G_DEFINE_FINAL_TYPE (SysprofSymbolCache, sysprof_symbol_cache, G_TYPE_OBJECT)
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static void
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sysprof_symbol_cache_finalize (GObject *object)
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{
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SysprofSymbolCache *self = (SysprofSymbolCache *)object;
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g_clear_pointer (&self->symbols, g_sequence_free);
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G_OBJECT_CLASS (sysprof_symbol_cache_parent_class)->finalize (object);
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}
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static void
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sysprof_symbol_cache_class_init (SysprofSymbolCacheClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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object_class->finalize = sysprof_symbol_cache_finalize;
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}
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static void
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sysprof_symbol_cache_init (SysprofSymbolCache *self)
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{
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self->symbols = g_sequence_new (g_object_unref);
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}
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SysprofSymbolCache *
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sysprof_symbol_cache_new (void)
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{
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return g_object_new (SYSPROF_TYPE_SYMBOL_CACHE, NULL);
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}
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static int
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sysprof_symbol_cache_compare (gconstpointer a,
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gconstpointer b,
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gpointer user_data)
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{
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const SysprofSymbol *sym_a = a;
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const SysprofSymbol *sym_b = b;
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if (sym_a->begin_address < sym_b->begin_address)
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return -1;
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if (sym_a->begin_address > sym_b->end_address)
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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_symbol_cache_take:
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* @self: a #SysprofSymbolCache
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* @symbol: (transfer full): a #SysprofSymbol
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*
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*/
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void
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sysprof_symbol_cache_take (SysprofSymbolCache *self,
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SysprofSymbol *symbol)
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{
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g_return_if_fail (SYSPROF_IS_SYMBOL_CACHE (self));
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g_return_if_fail (SYSPROF_IS_SYMBOL (symbol));
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if (symbol->begin_address == 0 || symbol->end_address == 0)
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return;
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g_sequence_insert_sorted (self->symbols,
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g_object_ref (symbol),
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sysprof_symbol_cache_compare,
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NULL);
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}
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static int
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sysprof_symbol_cache_lookup_func (gconstpointer a,
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gconstpointer b,
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gpointer user_data)
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{
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const SysprofSymbol *sym_a = a;
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const gint64 *addr = b;
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if (*addr < sym_a->begin_address)
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return 1;
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if (*addr > sym_a->end_address)
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return -1;
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return 0;
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}
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SysprofSymbol *
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sysprof_symbol_cache_lookup (SysprofSymbolCache *self,
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SysprofAddress address)
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{
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GSequenceIter *iter;
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g_return_val_if_fail (SYSPROF_IS_SYMBOL_CACHE (self), NULL);
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if (address == 0)
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return NULL;
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iter = g_sequence_lookup (self->symbols,
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&address,
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sysprof_symbol_cache_lookup_func,
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NULL);
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if (iter != NULL)
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return g_sequence_get (iter);
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return NULL;
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}
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