+++ /dev/null
-/*
- * Copyright 2020 EfficiOS, Inc.
- *
- * SPDX-License-Identifier: LGPL-2.1-only
- *
- */
-
-#include "event-expr-to-bytecode.h"
-
-#include <stdio.h>
-#include <lttng/event-expr.h>
-#include <common/bytecode/bytecode.h>
-#include <common/error.h>
-
-static
-int event_expr_to_bytecode_recursive(const struct lttng_event_expr *expr,
- struct lttng_bytecode_alloc **bytecode,
- struct lttng_bytecode_alloc **bytecode_reloc)
-{
- int status;
- enum lttng_event_expr_status event_expr_status;
-
- switch (lttng_event_expr_get_type(expr)) {
- case LTTNG_EVENT_EXPR_TYPE_EVENT_PAYLOAD_FIELD:
- {
- const char *name;
-
- status = bytecode_push_get_payload_root(bytecode);
- if (status) {
- ERR("Failed to get payload root from bytecode");
- goto end;
- }
-
- name = lttng_event_expr_event_payload_field_get_name(expr);
- if (!name) {
- ERR("Failed to get payload field name from event expression");
- status = -1;
- goto end;
- }
-
- status = bytecode_push_get_symbol(bytecode, bytecode_reloc, name);
- if (status) {
- ERR("Failed to push 'get symbol %s' in bytecode", name);
- goto end;
- }
-
- break;
- }
- case LTTNG_EVENT_EXPR_TYPE_CHANNEL_CONTEXT_FIELD:
- {
- const char *name;
-
- status = bytecode_push_get_context_root(bytecode);
- if (status) {
- ERR("Failed to get context root from bytecode");
- goto end;
- }
-
- name = lttng_event_expr_channel_context_field_get_name(expr);
- if (!name) {
- ERR("Failed to get channel context field name from event expression");
- status = -1;
- goto end;
- }
-
- status = bytecode_push_get_symbol(bytecode, bytecode_reloc, name);
- if (status) {
- ERR("Failed to push 'get symbol %s' in bytecode", name);
- goto end;
- }
-
- break;
- }
- case LTTNG_EVENT_EXPR_TYPE_APP_SPECIFIC_CONTEXT_FIELD:
- {
- int ret;
- char *name = NULL;
- const char *provider_name, *type_name;
-
- status = bytecode_push_get_app_context_root(bytecode);
- if (status) {
- ERR("Failed to get application context root from bytecode");
- goto end;
- }
-
- provider_name = lttng_event_expr_app_specific_context_field_get_provider_name(
- expr);
- if (!provider_name) {
- ERR("Failed to get application context provider name from event expression");
- status = -1;
- goto end;
- }
-
- type_name = lttng_event_expr_app_specific_context_field_get_type_name(
- expr);
- if (!type_name) {
- ERR("Failed to get application context type name from event expression");
- status = -1;
- goto end;
- }
-
- /*
- * Reconstitute the app context field name from its two parts.
- */
- ret = asprintf(&name, "%s:%s", provider_name, type_name);
- if (ret < 0) {
- PERROR("Failed to format application specific context: provider_name = '%s', type_name = '%s'",
- provider_name, type_name);
- status = -1;
- goto end;
- }
-
- status = bytecode_push_get_symbol(
- bytecode, bytecode_reloc, name);
- free(name);
- if (status) {
- ERR("Failed to push 'get symbol %s:%s' in bytecode",
- provider_name, type_name);
- goto end;
- }
-
- break;
- }
- case LTTNG_EVENT_EXPR_TYPE_ARRAY_FIELD_ELEMENT:
- {
- unsigned int index;
- const struct lttng_event_expr *parent;
-
- parent = lttng_event_expr_array_field_element_get_parent_expr(
- expr);
- if (!parent) {
- ERR("Failed to get parent expression from array event expression");
- status = -1;
- goto end;
- }
-
- status = event_expr_to_bytecode_recursive(
- parent, bytecode, bytecode_reloc);
- if (status) {
- goto end;
- }
-
- event_expr_status = lttng_event_expr_array_field_element_get_index(
- expr, &index);
- if (event_expr_status != LTTNG_EVENT_EXPR_STATUS_OK) {
- ERR("Failed to get array field element index from event expression");
- status = -1;
- goto end;
- }
-
- status = bytecode_push_get_index_u64(bytecode, index);
- if (status) {
- ERR("Failed to push 'get index %u' in bytecode", index);
- goto end;
- }
-
- break;
- }
- default:
- abort();
- }
-
- status = 0;
-end:
- return status;
-}
-
-LTTNG_HIDDEN
-int lttng_event_expr_to_bytecode(const struct lttng_event_expr *expr,
- struct lttng_bytecode **bytecode_out)
-{
- int status;
- struct return_op ret_insn;
- struct lttng_bytecode_alloc *bytecode = NULL;
- struct lttng_bytecode_alloc *bytecode_reloc = NULL;
-
- status = bytecode_init(&bytecode);
- if (status) {
- ERR("Failed to initialize bytecode");
- goto end;
- }
-
- status = bytecode_init(&bytecode_reloc);
- if (status) {
- ERR("Failed to initialize relocation bytecode");
- goto end;
- }
-
- status = event_expr_to_bytecode_recursive(
- expr, &bytecode, &bytecode_reloc);
- if (status) {
- /* Errors already logged. */
- goto end;
- }
-
- ret_insn.op = BYTECODE_OP_RETURN;
- bytecode_push(&bytecode, &ret_insn, 1, sizeof(ret_insn));
-
- /* Append symbol table to bytecode. */
- bytecode->b.reloc_table_offset = bytecode_get_len(&bytecode->b);
- status = bytecode_push(&bytecode, bytecode_reloc->b.data, 1,
- bytecode_get_len(&bytecode_reloc->b));
- if (status) {
- ERR("Failed to push symbol table to bytecode");
- goto end;
- }
-
- /* Copy the `lttng_bytecode` out of the `lttng_bytecode_alloc`. */
- *bytecode_out = lttng_bytecode_copy(&bytecode->b);
- if (!*bytecode_out) {
- status = -1;
- goto end;
- }
-
-end:
- if (bytecode) {
- free(bytecode);
- }
-
- if (bytecode_reloc) {
- free(bytecode_reloc);
- }
-
- return status;
-}
projects / lttng-tools.git / blobdiff