+++ /dev/null
-/*
- * resolve.c
- *
- * Babeltrace - CTF IR: Type resolving internal
- *
- * Copyright 2015 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- * Copyright 2016 Philippe Proulx <pproulx@efficios.com>
- *
- * Authors: Jérémie Galarneau <jeremie.galarneau@efficios.com>
- * Philippe Proulx <pproulx@efficios.com>
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-#include <babeltrace/ctf-ir/event.h>
-#include <babeltrace/ctf-ir/stream-class.h>
-#include <babeltrace/ctf-ir/resolve-internal.h>
-#include <babeltrace/ctf-ir/field-types.h>
-#include <babeltrace/ctf-ir/field-path.h>
-#include <babeltrace/ctf-ir/field-path-internal.h>
-#include <babeltrace/ctf-ir/event-internal.h>
-#include <babeltrace/ref.h>
-#include <babeltrace/babeltrace-internal.h>
-#include <babeltrace/values.h>
-#include <limits.h>
-#include <glib.h>
-
-#define _printf_error(fmt, args...) \
- printf_verbose("[resolving] " fmt, ## args)
-
-typedef GPtrArray type_stack;
-
-/*
- * A stack frame.
- *
- * `type` contains a compound field type (structure, variant, array,
- * or sequence) and `index` indicates the index of the field type in
- * the upper frame (-1 for array and sequence field types).
- *
- * `type` is owned by the stack frame.
- */
-struct type_stack_frame {
- struct bt_ctf_field_type *type;
- int index;
-};
-
-/*
- * The current context of the resolving engine.
- *
- * `scopes` contain the 6 CTF scope field types (see CTF, sect. 7.3.2)
- * in the following order:
- *
- * * Packet header
- * * Packet context
- * * Event header
- * * Stream event context
- * * Event context
- * * Event payload
- */
-struct resolve_context {
- struct bt_value *environment;
- struct bt_ctf_field_type *scopes[6];
-
- /* Root scope being visited */
- enum bt_ctf_scope root_scope;
- type_stack *type_stack;
- struct bt_ctf_field_type *cur_field_type;
-};
-
-/* TSDL dynamic scope prefixes as defined in CTF Section 7.3.2 */
-static const char * const absolute_path_prefixes[] = {
- [BT_CTF_SCOPE_ENV] = "env.",
- [BT_CTF_SCOPE_TRACE_PACKET_HEADER] = "trace.packet.header.",
- [BT_CTF_SCOPE_STREAM_PACKET_CONTEXT] = "stream.packet.context.",
- [BT_CTF_SCOPE_STREAM_EVENT_HEADER] = "stream.event.header.",
- [BT_CTF_SCOPE_STREAM_EVENT_CONTEXT] = "stream.event.context.",
- [BT_CTF_SCOPE_EVENT_CONTEXT] = "event.context.",
- [BT_CTF_SCOPE_EVENT_FIELDS] = "event.fields.",
-};
-
-/* Number of path tokens used for the absolute prefixes */
-static const int absolute_path_prefix_ptoken_counts[] = {
- [BT_CTF_SCOPE_ENV] = 1,
- [BT_CTF_SCOPE_TRACE_PACKET_HEADER] = 3,
- [BT_CTF_SCOPE_STREAM_PACKET_CONTEXT] = 3,
- [BT_CTF_SCOPE_STREAM_EVENT_HEADER] = 3,
- [BT_CTF_SCOPE_STREAM_EVENT_CONTEXT] = 3,
- [BT_CTF_SCOPE_EVENT_CONTEXT] = 2,
- [BT_CTF_SCOPE_EVENT_FIELDS] = 2,
-};
-
-/*
- * Destroys a type stack frame.
- */
-static
-void type_stack_destroy_notify(gpointer data)
-{
- struct type_stack_frame *frame = data;
-
- BT_PUT(frame->type);
- g_free(frame);
-}
-
-/*
- * Creates a type stack.
- *
- * Return value is owned by the caller.
- */
-static
-type_stack *type_stack_create(void)
-{
- return g_ptr_array_new_with_free_func(type_stack_destroy_notify);
-}
-
-/*
- * Destroys a type stack.
- */
-static
-void type_stack_destroy(type_stack *stack)
-{
- g_ptr_array_free(stack, TRUE);
-}
-
-/*
- * Pushes a field type onto a type stack.
- *
- * `type` is owned by the caller (stack frame gets a new reference).
- */
-static
-int type_stack_push(type_stack *stack, struct bt_ctf_field_type *type)
-{
- int ret = 0;
- struct type_stack_frame *frame = NULL;
-
- if (!stack || !type) {
- ret = -1;
- goto end;
- }
-
- frame = g_new0(struct type_stack_frame, 1);
- if (!frame) {
- ret = -1;
- goto end;
- }
-
- frame->type = bt_get(type);
- g_ptr_array_add(stack, frame);
-
-end:
- return ret;
-}
-
-/*
- * Checks whether or not `stack` is empty.
- */
-static
-bool type_stack_empty(type_stack *stack)
-{
- return stack->len == 0;
-}
-
-/*
- * Returns the number of frames in `stack`.
- */
-static
-size_t type_stack_size(type_stack *stack)
-{
- return stack->len;
-}
-
-/*
- * Returns the top frame of `stack`.
- *
- * Return value is owned by `stack`.
- */
-static
-struct type_stack_frame *type_stack_peek(type_stack *stack)
-{
- struct type_stack_frame *entry = NULL;
-
- if (!stack || type_stack_empty(stack)) {
- goto end;
- }
-
- entry = g_ptr_array_index(stack, stack->len - 1);
-end:
- return entry;
-}
-
-/*
- * Returns the frame at index `index` in `stack`.
- *
- * Return value is owned by `stack`.
- */
-static
-struct type_stack_frame *type_stack_at(type_stack *stack,
- size_t index)
-{
- struct type_stack_frame *entry = NULL;
-
- if (!stack || index >= stack->len) {
- goto end;
- }
-
- entry = g_ptr_array_index(stack, index);
-
-end:
- return entry;
-}
-
-/*
- * Removes the top frame of `stack`.
- */
-static
-void type_stack_pop(type_stack *stack)
-{
- if (!type_stack_empty(stack)) {
- /*
- * This will call the frame's destructor and free it, as
- * well as put its contained field type.
- */
- g_ptr_array_set_size(stack, stack->len - 1);
- }
-}
-
-/*
- * Returns the scope field type of `scope` in the context `ctx`.
- *
- * Return value is owned by `ctx` on success.
- */
-static
-struct bt_ctf_field_type *get_type_from_ctx(struct resolve_context *ctx,
- enum bt_ctf_scope scope)
-{
- assert(scope >= BT_CTF_SCOPE_TRACE_PACKET_HEADER &&
- scope <= BT_CTF_SCOPE_EVENT_FIELDS);
-
- return ctx->scopes[scope - BT_CTF_SCOPE_TRACE_PACKET_HEADER];
-}
-
-/*
- * Returns the CTF scope from a path string. May return
- * CTF_NODE_UNKNOWN if the path is found to be relative.
- */
-static
-enum bt_ctf_scope get_root_scope_from_absolute_pathstr(const char *pathstr)
-{
- enum bt_ctf_scope scope;
- enum bt_ctf_scope ret = BT_CTF_SCOPE_UNKNOWN;
- const size_t prefixes_count = sizeof(absolute_path_prefixes) /
- sizeof(*absolute_path_prefixes);
-
- for (scope = BT_CTF_SCOPE_ENV; scope < BT_CTF_SCOPE_ENV +
- prefixes_count; scope++) {
- /*
- * Chech if path string starts with a known absolute
- * path prefix.
- *
- * Refer to CTF 7.3.2 STATIC AND DYNAMIC SCOPES.
- */
- if (strncmp(pathstr, absolute_path_prefixes[scope],
- strlen(absolute_path_prefixes[scope]))) {
- /* Prefix does not match: try the next one */
- continue;
- }
-
- /* Found it! */
- ret = scope;
- goto end;
- }
-
-end:
- return ret;
-}
-
-/*
- * Destroys a path token.
- */
-static
-void ptokens_destroy_func(gpointer ptoken, gpointer data)
-{
- g_string_free(ptoken, TRUE);
-}
-
-/*
- * Destroys a path token list.
- */
-static
-void ptokens_destroy(GList *ptokens)
-{
- if (!ptokens) {
- return;
- }
-
- g_list_foreach(ptokens, ptokens_destroy_func, NULL);
- g_list_free(ptokens);
-}
-
-/*
- * Returns the string contained in a path token.
- */
-static
-const char *ptoken_get_string(GList *ptoken)
-{
- GString *tokenstr = (GString *) ptoken->data;
-
- return tokenstr->str;
-}
-
-/*
- * Converts a path string to a path token list, that is, splits the
- * individual words of a path string into a list of individual
- * strings.
- *
- * Return value is owned by the caller on success.
- */
-static
-GList *pathstr_to_ptokens(const char *pathstr)
-{
- const char *at = pathstr;
- const char *last = at;
- GList *ptokens = NULL;
-
- for (;;) {
- if (*at == '.' || *at == '\0') {
- GString *tokenstr;
-
- if (at == last) {
- /* Error: empty token */
- _printf_error("Empty token in path string at position %d\n",
- (int) (at - pathstr));
- goto error;
- }
-
- tokenstr = g_string_new(NULL);
- g_string_append_len(tokenstr, last, at - last);
- ptokens = g_list_append(ptokens, tokenstr);
- last = at + 1;
- }
-
- if (*at == '\0') {
- break;
- }
-
- at++;
- }
-
- return ptokens;
-
-error:
- ptokens_destroy(ptokens);
- return NULL;
-}
-
-/*
- * Converts a path token list to a field path object. The path token
- * list is relative from `type`. The index of the source looking for
- * its target within `type` is indicated by `src_index`. This can be
- * `INT_MAX` if the source is contained in `type`.
- *
- * `ptokens` is owned by the caller. `field_path` is an output parameter
- * owned by the caller that must be filled here. `type` is owned by the
- * caller.
- */
-static
-int ptokens_to_field_path(GList *ptokens, struct bt_ctf_field_path *field_path,
- struct bt_ctf_field_type *type, int src_index)
-{
- int ret = 0;
- GList *cur_ptoken = ptokens;
- bool first_level_done = false;
-
- /* Get our own reference */
- bt_get(type);
-
- /* Locate target */
- while (cur_ptoken) {
- int child_index;
- struct bt_ctf_field_type *child_type;
- const char *field_name = ptoken_get_string(cur_ptoken);
- enum ctf_type_id type_id = bt_ctf_field_type_get_type_id(type);
-
- /* Find to which index corresponds the current path token */
- if (type_id == CTF_TYPE_ARRAY || type_id == CTF_TYPE_SEQUENCE) {
- child_index = -1;
- } else {
- child_index = bt_ctf_field_type_get_field_index(type,
- field_name);
- if (child_index < 0) {
- /*
- * Error: field name does not exist or
- * wrong current type.
- */
- _printf_error("Cannot get index of field type named \"%s\"\n",
- field_name);
- ret = -1;
- goto end;
- } else if (child_index > src_index &&
- !first_level_done) {
- _printf_error("Child type is located after source index (%d)\n",
- src_index);
- ret = -1;
- goto end;
- }
-
- /* Next path token */
- cur_ptoken = g_list_next(cur_ptoken);
- first_level_done = true;
- }
-
- /* Create new field path entry */
- g_array_append_val(field_path->indexes, child_index);
-
- /* Get child field type */
- child_type = bt_ctf_field_type_get_field_at_index(type,
- child_index);
- if (!child_type) {
- _printf_error("Cannot get child type at index %d (field \"%s\")\n",
- child_index, field_name);
- ret = -1;
- goto end;
- }
-
- /* Move child type to current type */
- BT_MOVE(type, child_type);
- }
-
-end:
- bt_put(type);
- return ret;
-}
-
-/*
- * Converts a known absolute path token list to a field path object
- * within the resolving context `ctx`.
- *
- * `ptokens` is owned by the caller. `field_path` is an output parameter
- * owned by the caller that must be filled here.
- */
-static
-int absolute_ptokens_to_field_path(GList *ptokens,
- struct bt_ctf_field_path *field_path,
- struct resolve_context *ctx)
-{
- int ret = 0;
- GList *cur_ptoken;
- struct bt_ctf_field_type *type;
-
- /* Skip absolute path tokens */
- cur_ptoken = g_list_nth(ptokens,
- absolute_path_prefix_ptoken_counts[field_path->root]);
-
- /* Start with root type */
- type = get_type_from_ctx(ctx, field_path->root);
- if (!type) {
- /* Error: root type is not available */
- _printf_error("Root type with scope type %d is not available\n",
- field_path->root);
- ret = -1;
- goto end;
- }
-
- /* Locate target */
- ret = ptokens_to_field_path(cur_ptoken, field_path, type, INT_MAX);
-
-end:
- return ret;
-}
-
-/*
- * Converts a known relative path token list to a field path object
- * within the resolving context `ctx`.
- *
- * `ptokens` is owned by the caller. `field_path` is an output parameter
- * owned by the caller that must be filled here.
- */
-static
-int relative_ptokens_to_field_path(GList *ptokens,
- struct bt_ctf_field_path *field_path,
- struct resolve_context *ctx)
-{
- int ret = 0;
- int parent_pos_in_stack;
- struct bt_ctf_field_path *tail_field_path = bt_ctf_field_path_create();
-
- if (!tail_field_path) {
- _printf_error("Cannot create field path\n");
- ret = -1;
- goto end;
- }
-
- parent_pos_in_stack = type_stack_size(ctx->type_stack) - 1;
-
- while (parent_pos_in_stack >= 0) {
- struct bt_ctf_field_type *parent_type =
- type_stack_at(ctx->type_stack,
- parent_pos_in_stack)->type;
- int cur_index = type_stack_at(ctx->type_stack,
- parent_pos_in_stack)->index;
-
- /* Locate target from current parent type */
- ret = ptokens_to_field_path(ptokens, tail_field_path,
- parent_type, cur_index);
- if (ret) {
- /* Not found... yet */
- bt_ctf_field_path_clear(tail_field_path);
- } else {
- /* Found: stitch tail field path to head field path */
- int i = 0;
- int tail_field_path_len =
- tail_field_path->indexes->len;
-
- while (true) {
- struct bt_ctf_field_type *cur_type =
- type_stack_at(ctx->type_stack, i)->type;
- int index = type_stack_at(
- ctx->type_stack, i)->index;
-
- if (cur_type == parent_type) {
- break;
- }
-
- g_array_append_val(field_path->indexes,
- index);
- i++;
- }
-
- for (i = 0; i < tail_field_path_len; i++) {
- int index = g_array_index(
- tail_field_path->indexes,
- int, i);
-
- g_array_append_val(field_path->indexes,
- index);
- }
- break;
- }
-
- parent_pos_in_stack--;
- }
-
- if (parent_pos_in_stack < 0) {
- /* Not found: look in previous scopes */
- field_path->root--;
-
- while (field_path->root >= BT_CTF_SCOPE_TRACE_PACKET_HEADER) {
- struct bt_ctf_field_type *root_type;
- bt_ctf_field_path_clear(field_path);
-
- root_type = get_type_from_ctx(ctx, field_path->root);
- if (!root_type) {
- field_path->root--;
- continue;
- }
-
- /* Locate target in previous scope */
- ret = ptokens_to_field_path(ptokens, field_path,
- root_type, INT_MAX);
- if (ret) {
- /* Not found yet */
- field_path->root--;
- continue;
- }
-
- /* Found */
- break;
- }
- }
-
-end:
- BT_PUT(tail_field_path);
- return ret;
-}
-
-/*
- * Converts a path string to a field path object within the resolving
- * context `ctx`.
- *
- * Return value is owned by the caller on success.
- */
-static
-struct bt_ctf_field_path *pathstr_to_field_path(const char *pathstr,
- struct resolve_context *ctx)
-{
- int ret;
- enum bt_ctf_scope root_scope;
- GList *ptokens = NULL;
- struct bt_ctf_field_path *field_path = NULL;
-
- /* Create field path */
- field_path = bt_ctf_field_path_create();
- if (!field_path) {
- _printf_error("Cannot create field path\n");
- ret = -1;
- goto end;
- }
-
- /* Convert path string to path tokens */
- ptokens = pathstr_to_ptokens(pathstr);
- if (!ptokens) {
- _printf_error("Cannot convert path string \"%s\" to path tokens\n",
- pathstr);
- ret = -1;
- goto end;
- }
-
- /* Absolute or relative path? */
- root_scope = get_root_scope_from_absolute_pathstr(pathstr);
-
- if (root_scope == BT_CTF_SCOPE_UNKNOWN) {
- /* Relative path: start with current root scope */
- field_path->root = ctx->root_scope;
- ret = relative_ptokens_to_field_path(ptokens, field_path, ctx);
- if (ret) {
- _printf_error("Cannot get relative field path of path string \"%s\"\n",
- pathstr);
- _printf_error(" Starting at root scope %d, finished at root scope %d\n",
- ctx->root_scope, field_path->root);
- goto end;
- }
- } else if (root_scope == BT_CTF_SCOPE_ENV) {
- _printf_error("Sequence field types referring the trace environment are not supported as of this version\n");
- ret = -1;
- goto end;
- } else {
- /* Absolute path: use found root scope */
- field_path->root = root_scope;
- ret = absolute_ptokens_to_field_path(ptokens, field_path, ctx);
- if (ret) {
- _printf_error("Cannot get absolute field path of path string \"%s\"\n",
- pathstr);
- _printf_error(" Looking in root scope %d\n", root_scope);
- goto end;
- }
- }
-
-end:
- if (ret) {
- BT_PUT(field_path);
- }
-
- ptokens_destroy(ptokens);
-
- return field_path;
-}
-
-/*
- * Retrieves a field type by following the field path `field_path` in
- * the resolving context `ctx`.
- *
- * Return value is owned by the caller on success.
- */
-static
-struct bt_ctf_field_type *field_path_to_field_type(
- struct bt_ctf_field_path *field_path,
- struct resolve_context *ctx)
-{
- int i;
- struct bt_ctf_field_type *type;
-
- /* Start with root type */
- type = get_type_from_ctx(ctx, field_path->root);
- bt_get(type);
- if (!type) {
- /* Error: root type is not available */
- _printf_error("Root type with scope type %d is not available\n",
- field_path->root);
- goto error;
- }
-
- /* Locate target */
- for (i = 0; i < field_path->indexes->len; i++) {
- struct bt_ctf_field_type *child_type;
- int child_index =
- g_array_index(field_path->indexes, int, i);
-
- /* Get child field type */
- child_type = bt_ctf_field_type_get_field_at_index(type,
- child_index);
- if (!child_type) {
- _printf_error("Cannot get field type field at index %d\n",
- child_index);
- goto error;
- }
-
- /* Move child type to current type */
- BT_MOVE(type, child_type);
- }
-
- return type;
-
-error:
- BT_PUT(type);
- return type;
-}
-
-/*
- * Returns the equivalent field path object of the context type stack.
- *
- * Return value is owned by the caller on success.
- */
-static
-struct bt_ctf_field_path *get_ctx_stack_field_path(struct resolve_context *ctx)
-{
- int i;
- struct bt_ctf_field_path *field_path;
-
- /* Create field path */
- field_path = bt_ctf_field_path_create();
- if (!field_path) {
- _printf_error("Cannot create field path\n");
- goto error;
- }
-
- field_path->root = ctx->root_scope;
-
- for (i = 0; i < type_stack_size(ctx->type_stack); i++) {
- struct type_stack_frame *frame;
-
- frame = type_stack_at(ctx->type_stack, i);
- g_array_append_val(field_path->indexes, frame->index);
- }
-
- return field_path;
-
-error:
- BT_PUT(field_path);
- return field_path;
-}
-
-/*
- * Returns the lowest common ancestor of two field path objects
- * having the same root scope.
- *
- * `field_path1` and `field_path2` are owned by the caller.
- */
-int get_field_paths_lca_index(struct bt_ctf_field_path *field_path1,
- struct bt_ctf_field_path *field_path2)
-{
- int lca_index = 0;
- int field_path1_len, field_path2_len;
-
- /*
- * Start from both roots and find the first mismatch.
- */
- assert(field_path1->root == field_path2->root);
- field_path1_len = field_path1->indexes->len;
- field_path2_len = field_path2->indexes->len;
-
- while (true) {
- int target_index, ctx_index;
-
- if (lca_index == field_path2_len ||
- lca_index == field_path1_len) {
- /*
- * This means that both field paths never split.
- * This is invalid because the target cannot be
- * an ancestor of the source.
- */
- _printf_error("In source and target: one is an ancestor of the other\n");
- lca_index = -1;
- break;
- }
-
- target_index = g_array_index(field_path1->indexes, int,
- lca_index);
- ctx_index = g_array_index(field_path2->indexes, int,
- lca_index);
-
- if (target_index != ctx_index) {
- /* LCA index is the previous */
- break;
- }
-
- lca_index++;
- }
-
- return lca_index;
-}
-
-/*
- * Validates a target field path.
- *
- * `target_field_path` and `target_type` are owned by the caller.
- */
-static
-int validate_target_field_path(struct bt_ctf_field_path *target_field_path,
- struct bt_ctf_field_type *target_type,
- struct resolve_context *ctx)
-{
- int ret = 0;
- struct bt_ctf_field_path *ctx_field_path;
- int target_field_path_len = target_field_path->indexes->len;
- int lca_index;
- int ctx_cur_field_type_id;
- int target_type_id;
-
- /* Get context field path */
- ctx_field_path = get_ctx_stack_field_path(ctx);
- if (!ctx_field_path) {
- _printf_error("Cannot get source field path\n");
- ret = -1;
- goto end;
- }
-
- /*
- * Make sure the target is not a root.
- */
- if (target_field_path_len == 0) {
- _printf_error("Target field path's length is 0 (targeting the root)\n");
- ret = -1;
- goto end;
- }
-
- /*
- * Make sure the root of the target field path is not located
- * after the context field path's root.
- */
- if (target_field_path->root > ctx_field_path->root) {
- _printf_error("Target is located after source\n");
- ret = -1;
- goto end;
- }
-
- if (target_field_path->root == ctx_field_path->root) {
- int target_index, ctx_index;
-
- /*
- * Find the index of the lowest common ancestor of both field
- * paths.
- */
- lca_index = get_field_paths_lca_index(target_field_path,
- ctx_field_path);
- if (lca_index < 0) {
- _printf_error("Cannot get least common ancestor\n");
- ret = -1;
- goto end;
- }
-
- /*
- * Make sure the target field path is located before the
- * context field path.
- */
- target_index = g_array_index(target_field_path->indexes,
- int, lca_index);
- ctx_index = g_array_index(ctx_field_path->indexes,
- int, lca_index);
-
- if (target_index >= ctx_index) {
- _printf_error("Target index (%d) is greater or equal to source index (%d) in LCA\n",
- target_index, ctx_index);
- ret = -1;
- goto end;
- }
- }
-
- /*
- * Make sure the target type has the right type and properties.
- */
- ctx_cur_field_type_id = bt_ctf_field_type_get_type_id(
- ctx->cur_field_type);
- target_type_id = bt_ctf_field_type_get_type_id(target_type);
-
- if (ctx_cur_field_type_id == CTF_TYPE_VARIANT) {
- if (target_type_id != CTF_TYPE_ENUM) {
- _printf_error("Variant type's tag field type is not an enumeration\n");
- ret = -1;
- goto end;
- }
- } else if (ctx_cur_field_type_id == CTF_TYPE_SEQUENCE) {
- if (target_type_id != CTF_TYPE_INTEGER ||
- bt_ctf_field_type_integer_get_signed(
- target_type)) {
- _printf_error("Sequence type's length field type is not an unsigned integer\n");
- ret = -1;
- goto end;
- }
- } else {
- assert(false);
- }
-
-end:
- BT_PUT(ctx_field_path);
- return ret;
-}
-
-/*
- * Resolves a variant or sequence field type `type`.
- *
- * `type` is owned by the caller.
- */
-static
-int resolve_sequence_or_variant_type(struct bt_ctf_field_type *type,
- struct resolve_context *ctx)
-{
- int ret = 0;
- const char *pathstr;
- int type_id = bt_ctf_field_type_get_type_id(type);
- struct bt_ctf_field_path *target_field_path = NULL;
- struct bt_ctf_field_type *target_type = NULL;
-
- /* Get path string */
- switch (type_id) {
- case CTF_TYPE_SEQUENCE:
- pathstr =
- bt_ctf_field_type_sequence_get_length_field_name(type);
- break;
- case CTF_TYPE_VARIANT:
- pathstr =
- bt_ctf_field_type_variant_get_tag_name(type);
- break;
- default:
- assert(false);
- ret = -1;
- goto end;
- }
-
- /* Get target field path out of path string */
- target_field_path = pathstr_to_field_path(pathstr, ctx);
- if (!target_field_path) {
- _printf_error("Cannot get target field path for path string \"%s\"\n",
- pathstr);
- ret = -1;
- goto end;
- }
-
- /* Get target field type */
- target_type = field_path_to_field_type(target_field_path, ctx);
- if (!target_type) {
- _printf_error("Cannot get target field type for path string \"%s\"\n",
- pathstr);
- ret = -1;
- goto end;
- }
-
- ret = validate_target_field_path(target_field_path, target_type, ctx);
- if (ret) {
- _printf_error("Invalid target field path for path string \"%s\"\n",
- pathstr);
- goto end;
- }
-
- /* Set target field path and target field type */
- if (type_id == CTF_TYPE_SEQUENCE) {
- ret = bt_ctf_field_type_sequence_set_length_field_path(
- type, target_field_path);
- if (ret) {
- _printf_error("Cannot set sequence field type's length field path\n");
- goto end;
- }
- } else if (type_id == CTF_TYPE_VARIANT) {
- ret = bt_ctf_field_type_variant_set_tag_field_path(
- type, target_field_path);
- if (ret) {
- _printf_error("Cannot set variant field type's tag field path\n");
- goto end;
- }
-
- ret = bt_ctf_field_type_variant_set_tag_field_type(
- type, target_type);
- if (ret) {
- _printf_error("Cannot set variant field type's tag field type\n");
- goto end;
- }
- } else {
- assert(false);
- }
-
-end:
- BT_PUT(target_field_path);
- BT_PUT(target_type);
- return ret;
-}
-
-/*
- * Resolves a field type `type`.
- *
- * `type` is owned by the caller.
- */
-static
-int resolve_type(struct bt_ctf_field_type *type, struct resolve_context *ctx)
-{
- int ret = 0;
- int type_id;
-
- if (!type) {
- /* Type is not available; still valid */
- goto end;
- }
-
- type_id = bt_ctf_field_type_get_type_id(type);
- ctx->cur_field_type = type;
-
- /* Resolve sequence/variant field type */
- switch (type_id) {
- case CTF_TYPE_SEQUENCE:
- case CTF_TYPE_VARIANT:
- ret = resolve_sequence_or_variant_type(type, ctx);
- if (ret) {
- _printf_error("Cannot resolve sequence or variant field type's length/tag\n");
- goto end;
- }
- break;
- default:
- break;
- }
-
- /* Recurse into compound types */
- switch (type_id) {
- case CTF_TYPE_STRUCT:
- case CTF_TYPE_VARIANT:
- case CTF_TYPE_SEQUENCE:
- case CTF_TYPE_ARRAY:
- {
- int field_count, f_index;
-
- ret = type_stack_push(ctx->type_stack, type);
- if (ret) {
- _printf_error("Cannot push field type on type stack\n");
- _printf_error(" Stack size: %zu\n",
- type_stack_size(ctx->type_stack));
- goto end;
- }
-
- field_count = bt_ctf_field_type_get_field_count(type);
- if (field_count < 0) {
- _printf_error("Cannot get field type field count\n");
- ret = field_count;
- goto end;
- }
-
- for (f_index = 0; f_index < field_count; f_index++) {
- struct bt_ctf_field_type *child_type =
- bt_ctf_field_type_get_field_at_index(type,
- f_index);
-
- if (!child_type) {
- _printf_error("Cannot get field type field at index %d/%d\n",
- f_index, field_count);
- ret = -1;
- goto end;
- }
-
- if (type_id == CTF_TYPE_ARRAY ||
- type_id == CTF_TYPE_SEQUENCE) {
- type_stack_peek(ctx->type_stack)->index = -1;
- } else {
- type_stack_peek(ctx->type_stack)->index =
- f_index;
- }
-
- ret = resolve_type(child_type, ctx);
- BT_PUT(child_type);
- if (ret) {
- goto end;
- }
- }
-
- type_stack_pop(ctx->type_stack);
- break;
- }
- default:
- break;
- }
-
-end:
- return ret;
-}
-
-/*
- * Resolves the root field type corresponding to the scope `root_scope`.
- */
-static
-int resolve_root_type(enum bt_ctf_scope root_scope, struct resolve_context *ctx)
-{
- int ret;
-
- assert(type_stack_size(ctx->type_stack) == 0);
- ctx->root_scope = root_scope;
- ret = resolve_type(get_type_from_ctx(ctx, root_scope), ctx);
- ctx->root_scope = BT_CTF_SCOPE_UNKNOWN;
-
- return ret;
-}
-
-BT_HIDDEN
-int bt_ctf_resolve_types(
- struct bt_value *environment,
- struct bt_ctf_field_type *packet_header_type,
- struct bt_ctf_field_type *packet_context_type,
- struct bt_ctf_field_type *event_header_type,
- struct bt_ctf_field_type *stream_event_ctx_type,
- struct bt_ctf_field_type *event_context_type,
- struct bt_ctf_field_type *event_payload_type,
- enum bt_ctf_resolve_flag flags)
-{
- int ret = 0;
- struct resolve_context ctx = {
- .environment = environment,
- .scopes = {
- packet_header_type,
- packet_context_type,
- event_header_type,
- stream_event_ctx_type,
- event_context_type,
- event_payload_type,
- },
- .root_scope = BT_CTF_SCOPE_UNKNOWN,
- };
-
- /* Initialize type stack */
- ctx.type_stack = type_stack_create();
- if (!ctx.type_stack) {
- printf_error("Cannot create type stack\n");
- ret = -1;
- goto end;
- }
-
- /* Resolve packet header type */
- if (flags & BT_CTF_RESOLVE_FLAG_PACKET_HEADER) {
- ret = resolve_root_type(BT_CTF_SCOPE_TRACE_PACKET_HEADER, &ctx);
- if (ret) {
- _printf_error("Cannot resolve trace packet header type\n");
- goto end;
- }
- }
-
- /* Resolve packet context type */
- if (flags & BT_CTF_RESOLVE_FLAG_PACKET_CONTEXT) {
- ret = resolve_root_type(BT_CTF_SCOPE_STREAM_PACKET_CONTEXT, &ctx);
- if (ret) {
- _printf_error("Cannot resolve stream packet context type\n");
- goto end;
- }
- }
-
- /* Resolve event header type */
- if (flags & BT_CTF_RESOLVE_FLAG_EVENT_HEADER) {
- ret = resolve_root_type(BT_CTF_SCOPE_STREAM_EVENT_HEADER, &ctx);
- if (ret) {
- _printf_error("Cannot resolve stream event header type\n");
- goto end;
- }
- }
-
- /* Resolve stream event context type */
- if (flags & BT_CTF_RESOLVE_FLAG_STREAM_EVENT_CTX) {
- ret = resolve_root_type(BT_CTF_SCOPE_STREAM_EVENT_CONTEXT, &ctx);
- if (ret) {
- _printf_error("Cannot resolve stream event context type\n");
- goto end;
- }
- }
-
- /* Resolve event context type */
- if (flags & BT_CTF_RESOLVE_FLAG_EVENT_CONTEXT) {
- ret = resolve_root_type(BT_CTF_SCOPE_EVENT_CONTEXT, &ctx);
- if (ret) {
- _printf_error("Cannot resolve event context type\n");
- goto end;
- }
- }
-
- /* Resolve event payload type */
- if (flags & BT_CTF_RESOLVE_FLAG_EVENT_PAYLOAD) {
- ret = resolve_root_type(BT_CTF_SCOPE_EVENT_FIELDS, &ctx);
- if (ret) {
- _printf_error("Cannot resolve event payload type\n");
- goto end;
- }
- }
-
-end:
- type_stack_destroy(ctx.type_stack);
-
- return ret;
-}
projects / babeltrace.git / blobdiff