mirror of
https://github.com/varun-r-mallya/sysprof.git
synced 2025-12-31 20:36:25 +00:00
dbb7833cbf
This brings together the two libraries back into one now that the whole design is pretty well sorted out. They depend on roughly the same libraries anyway and it's way easier of the single library can both read and write the capture files (along with bringing in libsysprof-capture symbols in a single place).
261 lines
8.0 KiB
C
261 lines
8.0 KiB
C
/* sysprof-bundled-symbolizer.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-bundled-symbolizer-private.h"
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#include "sysprof-document-private.h"
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#include "sysprof-symbolizer-private.h"
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#include "sysprof-symbol-private.h"
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struct _SysprofBundledSymbolizer
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{
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SysprofSymbolizer parent_instance;
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const SysprofPackedSymbol *symbols;
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guint n_symbols;
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GBytes *bytes;
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const gchar *beginptr;
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const gchar *endptr;
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};
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struct _SysprofBundledSymbolizerClass
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{
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SysprofSymbolizerClass parent_class;
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};
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G_DEFINE_FINAL_TYPE (SysprofBundledSymbolizer, sysprof_bundled_symbolizer, SYSPROF_TYPE_SYMBOLIZER)
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static void
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sysprof_bundled_symbolizer_decode (SysprofBundledSymbolizer *self,
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GBytes *bytes,
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gboolean is_native)
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{
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char *beginptr;
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char *endptr;
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g_assert (SYSPROF_IS_BUNDLED_SYMBOLIZER (self));
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g_assert (bytes != NULL);
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/* Our GBytes always contain a trialing \0 after what we think
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* is the end of the buffer.
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*/
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beginptr = (char *)g_bytes_get_data (bytes, NULL);
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endptr = beginptr + g_bytes_get_size (bytes);
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for (char *ptr = beginptr;
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ptr < endptr && (ptr + sizeof (SysprofPackedSymbol)) < endptr;
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ptr += sizeof (SysprofPackedSymbol))
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{
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SysprofPackedSymbol *sym = (SysprofPackedSymbol *)ptr;
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if (sym->addr_begin == 0 &&
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sym->addr_end == 0 &&
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sym->pid == 0 &&
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sym->offset == 0)
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{
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self->symbols = (const SysprofPackedSymbol *)beginptr;
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self->n_symbols = sym - self->symbols;
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break;
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}
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else if (!is_native)
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{
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sym->addr_begin = GUINT64_SWAP_LE_BE (sym->addr_begin);
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sym->addr_end = GUINT64_SWAP_LE_BE (sym->addr_end);
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sym->pid = GUINT32_SWAP_LE_BE (sym->pid);
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sym->offset = GUINT32_SWAP_LE_BE (sym->offset);
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sym->tag_offset = GUINT32_SWAP_LE_BE (sym->tag_offset);
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}
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}
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self->beginptr = beginptr;
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self->endptr = endptr;
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self->bytes = g_bytes_ref (bytes);
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}
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static void
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sysprof_bundled_symbolizer_prepare_async (SysprofSymbolizer *symbolizer,
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SysprofDocument *document,
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GCancellable *cancellable,
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GAsyncReadyCallback callback,
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gpointer user_data)
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{
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SysprofBundledSymbolizer *self = (SysprofBundledSymbolizer *)symbolizer;
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g_autoptr(SysprofDocumentFile) file = NULL;
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g_autoptr(GBytes) bytes = NULL;
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g_autoptr(GTask) task = NULL;
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g_assert (SYSPROF_IS_BUNDLED_SYMBOLIZER (self));
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g_assert (SYSPROF_IS_DOCUMENT (document));
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g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
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task = g_task_new (self, cancellable, callback, user_data);
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g_task_set_source_tag (task, sysprof_bundled_symbolizer_prepare_async);
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if ((file = sysprof_document_lookup_file (document, "__symbols__")) &&
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(bytes = sysprof_document_file_dup_bytes (file)))
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sysprof_bundled_symbolizer_decode (self, bytes, _sysprof_document_is_native (document));
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g_task_return_boolean (task, TRUE);
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}
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static gboolean
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sysprof_bundled_symbolizer_prepare_finish (SysprofSymbolizer *symbolizer,
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GAsyncResult *result,
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GError **error)
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{
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g_assert (SYSPROF_IS_BUNDLED_SYMBOLIZER (symbolizer));
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g_assert (G_IS_TASK (result));
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g_assert (g_task_is_valid (result, symbolizer));
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return g_task_propagate_boolean (G_TASK (result), error);
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}
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static gint
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search_for_symbol_cb (gconstpointer a,
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gconstpointer b)
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{
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const SysprofPackedSymbol *key = a;
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const SysprofPackedSymbol *ele = b;
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if (key->pid < ele->pid)
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return -1;
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if (key->pid > ele->pid)
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return 1;
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g_assert (key->pid == ele->pid);
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if (key->addr_begin < ele->addr_begin)
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return -1;
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if (key->addr_begin >= ele->addr_end)
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return 1;
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g_assert (key->addr_begin >= ele->addr_begin);
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g_assert (key->addr_end <= ele->addr_end);
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return 0;
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}
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static SysprofSymbol *
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sysprof_bundled_symbolizer_symbolize (SysprofSymbolizer *symbolizer,
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SysprofStrings *strings,
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const SysprofProcessInfo *process_info,
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SysprofAddressContext context,
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SysprofAddress address)
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{
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SysprofBundledSymbolizer *self = SYSPROF_BUNDLED_SYMBOLIZER (symbolizer);
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g_autoptr(GRefString) tag = NULL;
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const SysprofPackedSymbol *ret;
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const SysprofPackedSymbol key = {
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.addr_begin = address,
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.addr_end = address,
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.pid = process_info ? process_info->pid : 0,
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.offset = 0,
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.tag_offset = 0,
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};
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if (self->n_symbols == 0)
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return NULL;
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g_assert (self->symbols != NULL);
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g_assert (self->n_symbols > 0);
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ret = bsearch (&key,
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self->symbols,
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self->n_symbols,
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sizeof (SysprofPackedSymbol),
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search_for_symbol_cb);
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if (ret == NULL || ret->offset == 0)
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return NULL;
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if (ret->tag_offset > 0)
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{
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if (ret->tag_offset < (self->endptr - self->beginptr))
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tag = sysprof_strings_get (strings, &self->beginptr[ret->tag_offset]);
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}
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if (ret->offset < (self->endptr - self->beginptr))
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{
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const char *name = &self->beginptr[ret->offset];
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SysprofSymbolKind kind;
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if (g_str_has_prefix (name, "- -"))
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kind = SYSPROF_SYMBOL_KIND_CONTEXT_SWITCH;
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else if (context == SYSPROF_ADDRESS_CONTEXT_KERNEL)
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kind = SYSPROF_SYMBOL_KIND_KERNEL;
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else if (name[0] == '[')
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kind = SYSPROF_SYMBOL_KIND_PROCESS;
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else
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kind = SYSPROF_SYMBOL_KIND_USER;
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return _sysprof_symbol_new (sysprof_strings_get (strings, name),
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NULL,
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g_steal_pointer (&tag),
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ret->addr_begin,
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ret->addr_end,
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kind);
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}
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return NULL;
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}
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static void
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sysprof_bundled_symbolizer_finalize (GObject *object)
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{
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SysprofBundledSymbolizer *self = (SysprofBundledSymbolizer *)object;
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self->symbols = NULL;
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self->n_symbols = 0;
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self->beginptr = NULL;
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self->endptr = NULL;
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g_clear_pointer (&self->bytes, g_bytes_unref);
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G_OBJECT_CLASS (sysprof_bundled_symbolizer_parent_class)->finalize (object);
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}
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static void
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sysprof_bundled_symbolizer_class_init (SysprofBundledSymbolizerClass *klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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SysprofSymbolizerClass *symbolizer_class = SYSPROF_SYMBOLIZER_CLASS (klass);
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object_class->finalize = sysprof_bundled_symbolizer_finalize;
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symbolizer_class->prepare_async = sysprof_bundled_symbolizer_prepare_async;
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symbolizer_class->prepare_finish = sysprof_bundled_symbolizer_prepare_finish;
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symbolizer_class->symbolize = sysprof_bundled_symbolizer_symbolize;
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}
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static void
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sysprof_bundled_symbolizer_init (SysprofBundledSymbolizer *self)
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{
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}
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SysprofSymbolizer *
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sysprof_bundled_symbolizer_new (void)
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{
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return g_object_new (SYSPROF_TYPE_BUNDLED_SYMBOLIZER, NULL);
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}
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