+++ /dev/null
-/*
- * lttng-filter-specialize.c
- *
- * LTTng modules filter code specializer.
- *
- * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@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 <linux/slab.h>
-#include <lttng-filter.h>
-#include "lib/align.h"
-
-static ssize_t bytecode_reserve_data(struct bytecode_runtime *runtime,
- size_t align, size_t len)
-{
- ssize_t ret;
- size_t padding = offset_align(runtime->data_len, align);
- size_t new_len = runtime->data_len + padding + len;
- size_t new_alloc_len = new_len;
- size_t old_alloc_len = runtime->data_alloc_len;
-
- if (new_len > FILTER_MAX_DATA_LEN)
- return -EINVAL;
-
- if (new_alloc_len > old_alloc_len) {
- char *newptr;
-
- new_alloc_len =
- max_t(size_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1);
- newptr = krealloc(runtime->data, new_alloc_len, GFP_KERNEL);
- if (!newptr)
- return -ENOMEM;
- runtime->data = newptr;
- /* We zero directly the memory from start of allocation. */
- memset(&runtime->data[old_alloc_len], 0, new_alloc_len - old_alloc_len);
- runtime->data_alloc_len = new_alloc_len;
- }
- runtime->data_len += padding;
- ret = runtime->data_len;
- runtime->data_len += len;
- return ret;
-}
-
-static ssize_t bytecode_push_data(struct bytecode_runtime *runtime,
- const void *p, size_t align, size_t len)
-{
- ssize_t offset;
-
- offset = bytecode_reserve_data(runtime, align, len);
- if (offset < 0)
- return -ENOMEM;
- memcpy(&runtime->data[offset], p, len);
- return offset;
-}
-
-static int specialize_load_field(struct vstack_entry *stack_top,
- struct load_op *insn)
-{
- int ret;
-
- switch (stack_top->load.type) {
- case LOAD_OBJECT:
- break;
- case LOAD_ROOT_CONTEXT:
- case LOAD_ROOT_APP_CONTEXT:
- case LOAD_ROOT_PAYLOAD:
- default:
- dbg_printk("Filter warning: cannot load root, missing field name.\n");
- ret = -EINVAL;
- goto end;
- }
- switch (stack_top->load.object_type) {
- case OBJECT_TYPE_S8:
- dbg_printk("op load field s8\n");
- stack_top->type = REG_S64;
- if (!stack_top->load.rev_bo)
- insn->op = FILTER_OP_LOAD_FIELD_S8;
- break;
- case OBJECT_TYPE_S16:
- dbg_printk("op load field s16\n");
- stack_top->type = REG_S64;
- if (!stack_top->load.rev_bo)
- insn->op = FILTER_OP_LOAD_FIELD_S16;
- break;
- case OBJECT_TYPE_S32:
- dbg_printk("op load field s32\n");
- stack_top->type = REG_S64;
- if (!stack_top->load.rev_bo)
- insn->op = FILTER_OP_LOAD_FIELD_S32;
- break;
- case OBJECT_TYPE_S64:
- dbg_printk("op load field s64\n");
- stack_top->type = REG_S64;
- if (!stack_top->load.rev_bo)
- insn->op = FILTER_OP_LOAD_FIELD_S64;
- break;
- case OBJECT_TYPE_U8:
- dbg_printk("op load field u8\n");
- stack_top->type = REG_S64;
- insn->op = FILTER_OP_LOAD_FIELD_U8;
- break;
- case OBJECT_TYPE_U16:
- dbg_printk("op load field u16\n");
- stack_top->type = REG_S64;
- if (!stack_top->load.rev_bo)
- insn->op = FILTER_OP_LOAD_FIELD_U16;
- break;
- case OBJECT_TYPE_U32:
- dbg_printk("op load field u32\n");
- stack_top->type = REG_S64;
- if (!stack_top->load.rev_bo)
- insn->op = FILTER_OP_LOAD_FIELD_U32;
- break;
- case OBJECT_TYPE_U64:
- dbg_printk("op load field u64\n");
- stack_top->type = REG_S64;
- if (!stack_top->load.rev_bo)
- insn->op = FILTER_OP_LOAD_FIELD_U64;
- break;
- case OBJECT_TYPE_DOUBLE:
- printk(KERN_WARNING "Double type unsupported\n\n");
- ret = -EINVAL;
- goto end;
- case OBJECT_TYPE_STRING:
- dbg_printk("op load field string\n");
- stack_top->type = REG_STRING;
- insn->op = FILTER_OP_LOAD_FIELD_STRING;
- break;
- case OBJECT_TYPE_STRING_SEQUENCE:
- dbg_printk("op load field string sequence\n");
- stack_top->type = REG_STRING;
- insn->op = FILTER_OP_LOAD_FIELD_SEQUENCE;
- break;
- case OBJECT_TYPE_DYNAMIC:
- ret = -EINVAL;
- goto end;
- case OBJECT_TYPE_SEQUENCE:
- case OBJECT_TYPE_ARRAY:
- case OBJECT_TYPE_STRUCT:
- case OBJECT_TYPE_VARIANT:
- printk(KERN_WARNING "Sequences, arrays, struct and variant cannot be loaded (nested types).\n");
- ret = -EINVAL;
- goto end;
- }
- return 0;
-
-end:
- return ret;
-}
-
-static int specialize_get_index_object_type(enum object_type *otype,
- int signedness, uint32_t elem_len)
-{
- switch (elem_len) {
- case 8:
- if (signedness)
- *otype = OBJECT_TYPE_S8;
- else
- *otype = OBJECT_TYPE_U8;
- break;
- case 16:
- if (signedness)
- *otype = OBJECT_TYPE_S16;
- else
- *otype = OBJECT_TYPE_U16;
- break;
- case 32:
- if (signedness)
- *otype = OBJECT_TYPE_S32;
- else
- *otype = OBJECT_TYPE_U32;
- break;
- case 64:
- if (signedness)
- *otype = OBJECT_TYPE_S64;
- else
- *otype = OBJECT_TYPE_U64;
- break;
- default:
- return -EINVAL;
- }
- return 0;
-}
-
-static int specialize_get_index(struct bytecode_runtime *runtime,
- struct load_op *insn, uint64_t index,
- struct vstack_entry *stack_top,
- int idx_len)
-{
- int ret;
- struct filter_get_index_data gid;
- ssize_t data_offset;
-
- memset(&gid, 0, sizeof(gid));
- switch (stack_top->load.type) {
- case LOAD_OBJECT:
- switch (stack_top->load.object_type) {
- case OBJECT_TYPE_ARRAY:
- {
- const struct lttng_event_field *field;
- uint32_t elem_len, num_elems;
- int signedness;
-
- field = stack_top->load.field;
- elem_len = field->type.u.array.elem_type.u.basic.integer.size;
- signedness = field->type.u.array.elem_type.u.basic.integer.signedness;
- num_elems = field->type.u.array.length;
- if (index >= num_elems) {
- ret = -EINVAL;
- goto end;
- }
- ret = specialize_get_index_object_type(&stack_top->load.object_type,
- signedness, elem_len);
- if (ret)
- goto end;
- gid.offset = index * (elem_len / CHAR_BIT);
- gid.array_len = num_elems * (elem_len / CHAR_BIT);
- gid.elem.type = stack_top->load.object_type;
- gid.elem.len = elem_len;
- if (field->type.u.array.elem_type.u.basic.integer.reverse_byte_order)
- gid.elem.rev_bo = true;
- stack_top->load.rev_bo = gid.elem.rev_bo;
- break;
- }
- case OBJECT_TYPE_SEQUENCE:
- {
- const struct lttng_event_field *field;
- uint32_t elem_len;
- int signedness;
-
- field = stack_top->load.field;
- elem_len = field->type.u.sequence.elem_type.u.basic.integer.size;
- signedness = field->type.u.sequence.elem_type.u.basic.integer.signedness;
- ret = specialize_get_index_object_type(&stack_top->load.object_type,
- signedness, elem_len);
- if (ret)
- goto end;
- gid.offset = index * (elem_len / CHAR_BIT);
- gid.elem.type = stack_top->load.object_type;
- gid.elem.len = elem_len;
- if (field->type.u.sequence.elem_type.u.basic.integer.reverse_byte_order)
- gid.elem.rev_bo = true;
- stack_top->load.rev_bo = gid.elem.rev_bo;
- break;
- }
- case OBJECT_TYPE_STRUCT:
- /* Only generated by the specialize phase. */
- case OBJECT_TYPE_VARIANT: /* Fall-through */
- default:
- printk(KERN_WARNING "Unexpected get index type %d",
- (int) stack_top->load.object_type);
- ret = -EINVAL;
- goto end;
- }
- break;
- case LOAD_ROOT_CONTEXT:
- case LOAD_ROOT_APP_CONTEXT:
- case LOAD_ROOT_PAYLOAD:
- printk(KERN_WARNING "Index lookup for root field not implemented yet.\n");
- ret = -EINVAL;
- goto end;
- }
- data_offset = bytecode_push_data(runtime, &gid,
- __alignof__(gid), sizeof(gid));
- if (data_offset < 0) {
- ret = -EINVAL;
- goto end;
- }
- switch (idx_len) {
- case 2:
- ((struct get_index_u16 *) insn->data)->index = data_offset;
- break;
- case 8:
- ((struct get_index_u64 *) insn->data)->index = data_offset;
- break;
- default:
- ret = -EINVAL;
- goto end;
- }
-
- return 0;
-
-end:
- return ret;
-}
-
-static int specialize_context_lookup_name(struct bytecode_runtime *bytecode,
- struct load_op *insn)
-{
- uint16_t offset;
- const char *name;
-
- offset = ((struct get_symbol *) insn->data)->offset;
- name = bytecode->p.bc->bc.data + bytecode->p.bc->bc.reloc_offset + offset;
- return lttng_get_context_index(lttng_static_ctx, name);
-}
-
-static int specialize_load_object(const struct lttng_event_field *field,
- struct vstack_load *load, bool is_context)
-{
- load->type = LOAD_OBJECT;
- /*
- * LTTng-UST layout all integer fields as s64 on the stack for the filter.
- */
- switch (field->type.atype) {
- case atype_integer:
- if (field->type.u.basic.integer.signedness)
- load->object_type = OBJECT_TYPE_S64;
- else
- load->object_type = OBJECT_TYPE_U64;
- load->rev_bo = false;
- break;
- case atype_enum:
- {
- const struct lttng_integer_type *itype =
- &field->type.u.basic.enumeration.container_type;
-
- if (itype->signedness)
- load->object_type = OBJECT_TYPE_S64;
- else
- load->object_type = OBJECT_TYPE_U64;
- load->rev_bo = false;
- break;
- }
- case atype_array:
- if (field->type.u.array.elem_type.atype != atype_integer) {
- printk(KERN_WARNING "Array nesting only supports integer types.\n");
- return -EINVAL;
- }
- if (is_context) {
- load->object_type = OBJECT_TYPE_STRING;
- } else {
- if (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) {
- load->object_type = OBJECT_TYPE_ARRAY;
- load->field = field;
- } else {
- load->object_type = OBJECT_TYPE_STRING_SEQUENCE;
- }
- }
- break;
- case atype_sequence:
- if (field->type.u.sequence.elem_type.atype != atype_integer) {
- printk(KERN_WARNING "Sequence nesting only supports integer types.\n");
- return -EINVAL;
- }
- if (is_context) {
- load->object_type = OBJECT_TYPE_STRING;
- } else {
- if (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) {
- load->object_type = OBJECT_TYPE_SEQUENCE;
- load->field = field;
- } else {
- load->object_type = OBJECT_TYPE_STRING_SEQUENCE;
- }
- }
- break;
- case atype_array_bitfield:
- printk(KERN_WARNING "Bitfield array type is not supported.\n");
- return -EINVAL;
- case atype_sequence_bitfield:
- printk(KERN_WARNING "Bitfield sequence type is not supported.\n");
- return -EINVAL;
- case atype_string:
- load->object_type = OBJECT_TYPE_STRING;
- break;
- case atype_struct:
- printk(KERN_WARNING "Structure type cannot be loaded.\n");
- return -EINVAL;
- default:
- printk(KERN_WARNING "Unknown type: %d", (int) field->type.atype);
- return -EINVAL;
- }
- return 0;
-}
-
-static int specialize_context_lookup(struct bytecode_runtime *runtime,
- struct load_op *insn,
- struct vstack_load *load)
-{
- int idx, ret;
- struct lttng_ctx_field *ctx_field;
- struct lttng_event_field *field;
- struct filter_get_index_data gid;
- ssize_t data_offset;
-
- idx = specialize_context_lookup_name(runtime, insn);
- if (idx < 0) {
- return -ENOENT;
- }
- ctx_field = <tng_static_ctx->fields[idx];
- field = &ctx_field->event_field;
- ret = specialize_load_object(field, load, true);
- if (ret)
- return ret;
- /* Specialize each get_symbol into a get_index. */
- insn->op = FILTER_OP_GET_INDEX_U16;
- memset(&gid, 0, sizeof(gid));
- gid.ctx_index = idx;
- gid.elem.type = load->object_type;
- data_offset = bytecode_push_data(runtime, &gid,
- __alignof__(gid), sizeof(gid));
- if (data_offset < 0) {
- return -EINVAL;
- }
- ((struct get_index_u16 *) insn->data)->index = data_offset;
- return 0;
-}
-
-static int specialize_event_payload_lookup(struct lttng_event *event,
- struct bytecode_runtime *runtime,
- struct load_op *insn,
- struct vstack_load *load)
-{
- const char *name;
- uint16_t offset;
- const struct lttng_event_desc *desc = event->desc;
- unsigned int i, nr_fields;
- bool found = false;
- uint32_t field_offset = 0;
- const struct lttng_event_field *field;
- int ret;
- struct filter_get_index_data gid;
- ssize_t data_offset;
-
- nr_fields = desc->nr_fields;
- offset = ((struct get_symbol *) insn->data)->offset;
- name = runtime->p.bc->bc.data + runtime->p.bc->bc.reloc_offset + offset;
- for (i = 0; i < nr_fields; i++) {
- field = &desc->fields[i];
- if (!strcmp(field->name, name)) {
- found = true;
- break;
- }
- /* compute field offset on stack */
- switch (field->type.atype) {
- case atype_integer:
- case atype_enum:
- field_offset += sizeof(int64_t);
- break;
- case atype_array:
- case atype_sequence:
- case atype_array_bitfield:
- case atype_sequence_bitfield:
- field_offset += sizeof(unsigned long);
- field_offset += sizeof(void *);
- break;
- case atype_string:
- field_offset += sizeof(void *);
- break;
- default:
- ret = -EINVAL;
- goto end;
- }
- }
- if (!found) {
- ret = -EINVAL;
- goto end;
- }
-
- ret = specialize_load_object(field, load, false);
- if (ret)
- goto end;
-
- /* Specialize each get_symbol into a get_index. */
- insn->op = FILTER_OP_GET_INDEX_U16;
- memset(&gid, 0, sizeof(gid));
- gid.offset = field_offset;
- gid.elem.type = load->object_type;
- data_offset = bytecode_push_data(runtime, &gid,
- __alignof__(gid), sizeof(gid));
- if (data_offset < 0) {
- ret = -EINVAL;
- goto end;
- }
- ((struct get_index_u16 *) insn->data)->index = data_offset;
- ret = 0;
-end:
- return ret;
-}
-
-int lttng_filter_specialize_bytecode(struct lttng_event *event,
- struct bytecode_runtime *bytecode)
-{
- void *pc, *next_pc, *start_pc;
- int ret = -EINVAL;
- struct vstack _stack;
- struct vstack *stack = &_stack;
-
- vstack_init(stack);
-
- start_pc = &bytecode->code[0];
- for (pc = next_pc = start_pc; pc - start_pc < bytecode->len;
- pc = next_pc) {
- switch (*(filter_opcode_t *) pc) {
- case FILTER_OP_UNKNOWN:
- default:
- printk(KERN_WARNING "unknown bytecode op %u\n",
- (unsigned int) *(filter_opcode_t *) pc);
- ret = -EINVAL;
- goto end;
-
- case FILTER_OP_RETURN:
- ret = 0;
- goto end;
-
- /* binary */
- case FILTER_OP_MUL:
- case FILTER_OP_DIV:
- case FILTER_OP_MOD:
- case FILTER_OP_PLUS:
- case FILTER_OP_MINUS:
- case FILTER_OP_RSHIFT:
- case FILTER_OP_LSHIFT:
- printk(KERN_WARNING "unsupported bytecode op %u\n",
- (unsigned int) *(filter_opcode_t *) pc);
- ret = -EINVAL;
- goto end;
-
- case FILTER_OP_EQ:
- {
- struct binary_op *insn = (struct binary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_STRING:
- if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING)
- insn->op = FILTER_OP_EQ_STAR_GLOB_STRING;
- else
- insn->op = FILTER_OP_EQ_STRING;
- break;
- case REG_STAR_GLOB_STRING:
- insn->op = FILTER_OP_EQ_STAR_GLOB_STRING;
- break;
- case REG_S64:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_EQ_S64;
- else
- insn->op = FILTER_OP_EQ_DOUBLE_S64;
- break;
- case REG_DOUBLE:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_EQ_S64_DOUBLE;
- else
- insn->op = FILTER_OP_EQ_DOUBLE;
- break;
- }
- /* Pop 2, push 1 */
- if (vstack_pop(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct binary_op);
- break;
- }
-
- case FILTER_OP_NE:
- {
- struct binary_op *insn = (struct binary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_STRING:
- if (vstack_bx(stack)->type == REG_STAR_GLOB_STRING)
- insn->op = FILTER_OP_NE_STAR_GLOB_STRING;
- else
- insn->op = FILTER_OP_NE_STRING;
- break;
- case REG_STAR_GLOB_STRING:
- insn->op = FILTER_OP_NE_STAR_GLOB_STRING;
- break;
- case REG_S64:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_NE_S64;
- else
- insn->op = FILTER_OP_NE_DOUBLE_S64;
- break;
- case REG_DOUBLE:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_NE_S64_DOUBLE;
- else
- insn->op = FILTER_OP_NE_DOUBLE;
- break;
- }
- /* Pop 2, push 1 */
- if (vstack_pop(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct binary_op);
- break;
- }
-
- case FILTER_OP_GT:
- {
- struct binary_op *insn = (struct binary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_STAR_GLOB_STRING:
- printk(KERN_WARNING "invalid register type for > binary operator\n");
- ret = -EINVAL;
- goto end;
- case REG_STRING:
- insn->op = FILTER_OP_GT_STRING;
- break;
- case REG_S64:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_GT_S64;
- else
- insn->op = FILTER_OP_GT_DOUBLE_S64;
- break;
- case REG_DOUBLE:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_GT_S64_DOUBLE;
- else
- insn->op = FILTER_OP_GT_DOUBLE;
- break;
- }
- /* Pop 2, push 1 */
- if (vstack_pop(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct binary_op);
- break;
- }
-
- case FILTER_OP_LT:
- {
- struct binary_op *insn = (struct binary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_STAR_GLOB_STRING:
- printk(KERN_WARNING "invalid register type for < binary operator\n");
- ret = -EINVAL;
- goto end;
- case REG_STRING:
- insn->op = FILTER_OP_LT_STRING;
- break;
- case REG_S64:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_LT_S64;
- else
- insn->op = FILTER_OP_LT_DOUBLE_S64;
- break;
- case REG_DOUBLE:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_LT_S64_DOUBLE;
- else
- insn->op = FILTER_OP_LT_DOUBLE;
- break;
- }
- /* Pop 2, push 1 */
- if (vstack_pop(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct binary_op);
- break;
- }
-
- case FILTER_OP_GE:
- {
- struct binary_op *insn = (struct binary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_STAR_GLOB_STRING:
- printk(KERN_WARNING "invalid register type for >= binary operator\n");
- ret = -EINVAL;
- goto end;
- case REG_STRING:
- insn->op = FILTER_OP_GE_STRING;
- break;
- case REG_S64:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_GE_S64;
- else
- insn->op = FILTER_OP_GE_DOUBLE_S64;
- break;
- case REG_DOUBLE:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_GE_S64_DOUBLE;
- else
- insn->op = FILTER_OP_GE_DOUBLE;
- break;
- }
- /* Pop 2, push 1 */
- if (vstack_pop(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct binary_op);
- break;
- }
- case FILTER_OP_LE:
- {
- struct binary_op *insn = (struct binary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_STAR_GLOB_STRING:
- printk(KERN_WARNING "invalid register type for <= binary operator\n");
- ret = -EINVAL;
- goto end;
- case REG_STRING:
- insn->op = FILTER_OP_LE_STRING;
- break;
- case REG_S64:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_LE_S64;
- else
- insn->op = FILTER_OP_LE_DOUBLE_S64;
- break;
- case REG_DOUBLE:
- if (vstack_bx(stack)->type == REG_S64)
- insn->op = FILTER_OP_LE_S64_DOUBLE;
- else
- insn->op = FILTER_OP_LE_DOUBLE;
- break;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct binary_op);
- break;
- }
-
- case FILTER_OP_EQ_STRING:
- case FILTER_OP_NE_STRING:
- case FILTER_OP_GT_STRING:
- case FILTER_OP_LT_STRING:
- case FILTER_OP_GE_STRING:
- case FILTER_OP_LE_STRING:
- case FILTER_OP_EQ_STAR_GLOB_STRING:
- case FILTER_OP_NE_STAR_GLOB_STRING:
- case FILTER_OP_EQ_S64:
- case FILTER_OP_NE_S64:
- case FILTER_OP_GT_S64:
- case FILTER_OP_LT_S64:
- case FILTER_OP_GE_S64:
- case FILTER_OP_LE_S64:
- case FILTER_OP_EQ_DOUBLE:
- case FILTER_OP_NE_DOUBLE:
- case FILTER_OP_GT_DOUBLE:
- case FILTER_OP_LT_DOUBLE:
- case FILTER_OP_GE_DOUBLE:
- case FILTER_OP_LE_DOUBLE:
- case FILTER_OP_EQ_DOUBLE_S64:
- case FILTER_OP_NE_DOUBLE_S64:
- case FILTER_OP_GT_DOUBLE_S64:
- case FILTER_OP_LT_DOUBLE_S64:
- case FILTER_OP_GE_DOUBLE_S64:
- case FILTER_OP_LE_DOUBLE_S64:
- case FILTER_OP_EQ_S64_DOUBLE:
- case FILTER_OP_NE_S64_DOUBLE:
- case FILTER_OP_GT_S64_DOUBLE:
- case FILTER_OP_LT_S64_DOUBLE:
- case FILTER_OP_GE_S64_DOUBLE:
- case FILTER_OP_LE_S64_DOUBLE:
- case FILTER_OP_BIT_AND:
- case FILTER_OP_BIT_OR:
- case FILTER_OP_BIT_XOR:
- {
- /* Pop 2, push 1 */
- if (vstack_pop(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct binary_op);
- break;
- }
-
- /* unary */
- case FILTER_OP_UNARY_PLUS:
- {
- struct unary_op *insn = (struct unary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- insn->op = FILTER_OP_UNARY_PLUS_S64;
- break;
- case REG_DOUBLE:
- insn->op = FILTER_OP_UNARY_PLUS_DOUBLE;
- break;
- }
- /* Pop 1, push 1 */
- next_pc += sizeof(struct unary_op);
- break;
- }
-
- case FILTER_OP_UNARY_MINUS:
- {
- struct unary_op *insn = (struct unary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- insn->op = FILTER_OP_UNARY_MINUS_S64;
- break;
- case REG_DOUBLE:
- insn->op = FILTER_OP_UNARY_MINUS_DOUBLE;
- break;
- }
- /* Pop 1, push 1 */
- next_pc += sizeof(struct unary_op);
- break;
- }
-
- case FILTER_OP_UNARY_NOT:
- {
- struct unary_op *insn = (struct unary_op *) pc;
-
- switch(vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_S64:
- insn->op = FILTER_OP_UNARY_NOT_S64;
- break;
- case REG_DOUBLE:
- insn->op = FILTER_OP_UNARY_NOT_DOUBLE;
- break;
- }
- /* Pop 1, push 1 */
- next_pc += sizeof(struct unary_op);
- break;
- }
-
- case FILTER_OP_UNARY_PLUS_S64:
- case FILTER_OP_UNARY_MINUS_S64:
- case FILTER_OP_UNARY_NOT_S64:
- case FILTER_OP_UNARY_PLUS_DOUBLE:
- case FILTER_OP_UNARY_MINUS_DOUBLE:
- case FILTER_OP_UNARY_NOT_DOUBLE:
- {
- /* Pop 1, push 1 */
- next_pc += sizeof(struct unary_op);
- break;
- }
-
- /* logical */
- case FILTER_OP_AND:
- case FILTER_OP_OR:
- {
- /* Continue to next instruction */
- /* Pop 1 when jump not taken */
- if (vstack_pop(stack)) {
- ret = -EINVAL;
- goto end;
- }
- next_pc += sizeof(struct logical_op);
- break;
- }
-
- /* load field ref */
- case FILTER_OP_LOAD_FIELD_REF:
- {
- printk(KERN_WARNING "Unknown field ref type\n");
- ret = -EINVAL;
- goto end;
- }
- /* get context ref */
- case FILTER_OP_GET_CONTEXT_REF:
- {
- printk(KERN_WARNING "Unknown get context ref type\n");
- ret = -EINVAL;
- goto end;
- }
- case FILTER_OP_LOAD_FIELD_REF_STRING:
- case FILTER_OP_LOAD_FIELD_REF_SEQUENCE:
- case FILTER_OP_GET_CONTEXT_REF_STRING:
- case FILTER_OP_LOAD_FIELD_REF_USER_STRING:
- case FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_STRING;
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- break;
- }
- case FILTER_OP_LOAD_FIELD_REF_S64:
- case FILTER_OP_GET_CONTEXT_REF_S64:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- break;
- }
- case FILTER_OP_LOAD_FIELD_REF_DOUBLE:
- case FILTER_OP_GET_CONTEXT_REF_DOUBLE:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_DOUBLE;
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- break;
- }
-
- /* load from immediate operand */
- case FILTER_OP_LOAD_STRING:
- {
- struct load_op *insn = (struct load_op *) pc;
-
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_STRING;
- next_pc += sizeof(struct load_op) + strlen(insn->data) + 1;
- break;
- }
-
- case FILTER_OP_LOAD_STAR_GLOB_STRING:
- {
- struct load_op *insn = (struct load_op *) pc;
-
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_STAR_GLOB_STRING;
- next_pc += sizeof(struct load_op) + strlen(insn->data) + 1;
- break;
- }
-
- case FILTER_OP_LOAD_S64:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct load_op)
- + sizeof(struct literal_numeric);
- break;
- }
-
- case FILTER_OP_LOAD_DOUBLE:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_DOUBLE;
- next_pc += sizeof(struct load_op)
- + sizeof(struct literal_double);
- break;
- }
-
- /* cast */
- case FILTER_OP_CAST_TO_S64:
- {
- struct cast_op *insn = (struct cast_op *) pc;
-
- switch (vstack_ax(stack)->type) {
- default:
- printk(KERN_WARNING "unknown register type\n");
- ret = -EINVAL;
- goto end;
-
- case REG_STRING:
- case REG_STAR_GLOB_STRING:
- printk(KERN_WARNING "Cast op can only be applied to numeric or floating point registers\n");
- ret = -EINVAL;
- goto end;
- case REG_S64:
- insn->op = FILTER_OP_CAST_NOP;
- break;
- case REG_DOUBLE:
- insn->op = FILTER_OP_CAST_DOUBLE_TO_S64;
- break;
- }
- /* Pop 1, push 1 */
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct cast_op);
- break;
- }
- case FILTER_OP_CAST_DOUBLE_TO_S64:
- {
- /* Pop 1, push 1 */
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct cast_op);
- break;
- }
- case FILTER_OP_CAST_NOP:
- {
- next_pc += sizeof(struct cast_op);
- break;
- }
-
- /*
- * Instructions for recursive traversal through composed types.
- */
- case FILTER_OP_GET_CONTEXT_ROOT:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_PTR;
- vstack_ax(stack)->load.type = LOAD_ROOT_CONTEXT;
- next_pc += sizeof(struct load_op);
- break;
- }
- case FILTER_OP_GET_APP_CONTEXT_ROOT:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_PTR;
- vstack_ax(stack)->load.type = LOAD_ROOT_APP_CONTEXT;
- next_pc += sizeof(struct load_op);
- break;
- }
- case FILTER_OP_GET_PAYLOAD_ROOT:
- {
- if (vstack_push(stack)) {
- ret = -EINVAL;
- goto end;
- }
- vstack_ax(stack)->type = REG_PTR;
- vstack_ax(stack)->load.type = LOAD_ROOT_PAYLOAD;
- next_pc += sizeof(struct load_op);
- break;
- }
-
- case FILTER_OP_LOAD_FIELD:
- {
- struct load_op *insn = (struct load_op *) pc;
-
- WARN_ON_ONCE(vstack_ax(stack)->type != REG_PTR);
- /* Pop 1, push 1 */
- ret = specialize_load_field(vstack_ax(stack), insn);
- if (ret)
- goto end;
-
- next_pc += sizeof(struct load_op);
- break;
- }
-
- case FILTER_OP_LOAD_FIELD_S8:
- case FILTER_OP_LOAD_FIELD_S16:
- case FILTER_OP_LOAD_FIELD_S32:
- case FILTER_OP_LOAD_FIELD_S64:
- case FILTER_OP_LOAD_FIELD_U8:
- case FILTER_OP_LOAD_FIELD_U16:
- case FILTER_OP_LOAD_FIELD_U32:
- case FILTER_OP_LOAD_FIELD_U64:
- {
- /* Pop 1, push 1 */
- vstack_ax(stack)->type = REG_S64;
- next_pc += sizeof(struct load_op);
- break;
- }
-
- case FILTER_OP_LOAD_FIELD_STRING:
- case FILTER_OP_LOAD_FIELD_SEQUENCE:
- {
- /* Pop 1, push 1 */
- vstack_ax(stack)->type = REG_STRING;
- next_pc += sizeof(struct load_op);
- break;
- }
-
- case FILTER_OP_LOAD_FIELD_DOUBLE:
- {
- /* Pop 1, push 1 */
- vstack_ax(stack)->type = REG_DOUBLE;
- next_pc += sizeof(struct load_op);
- break;
- }
-
- case FILTER_OP_GET_SYMBOL:
- {
- struct load_op *insn = (struct load_op *) pc;
-
- dbg_printk("op get symbol\n");
- switch (vstack_ax(stack)->load.type) {
- case LOAD_OBJECT:
- printk(KERN_WARNING "Nested fields not implemented yet.\n");
- ret = -EINVAL;
- goto end;
- case LOAD_ROOT_CONTEXT:
- /* Lookup context field. */
- ret = specialize_context_lookup(bytecode, insn,
- &vstack_ax(stack)->load);
- if (ret)
- goto end;
- break;
- case LOAD_ROOT_APP_CONTEXT:
- ret = -EINVAL;
- goto end;
- case LOAD_ROOT_PAYLOAD:
- /* Lookup event payload field. */
- ret = specialize_event_payload_lookup(event,
- bytecode, insn,
- &vstack_ax(stack)->load);
- if (ret)
- goto end;
- break;
- }
- next_pc += sizeof(struct load_op) + sizeof(struct get_symbol);
- break;
- }
-
- case FILTER_OP_GET_SYMBOL_FIELD:
- {
- /* Always generated by specialize phase. */
- ret = -EINVAL;
- goto end;
- }
-
- case FILTER_OP_GET_INDEX_U16:
- {
- struct load_op *insn = (struct load_op *) pc;
- struct get_index_u16 *index = (struct get_index_u16 *) insn->data;
-
- dbg_printk("op get index u16\n");
- /* Pop 1, push 1 */
- ret = specialize_get_index(bytecode, insn, index->index,
- vstack_ax(stack), sizeof(*index));
- if (ret)
- goto end;
- next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16);
- break;
- }
-
- case FILTER_OP_GET_INDEX_U64:
- {
- struct load_op *insn = (struct load_op *) pc;
- struct get_index_u64 *index = (struct get_index_u64 *) insn->data;
-
- dbg_printk("op get index u64\n");
- /* Pop 1, push 1 */
- ret = specialize_get_index(bytecode, insn, index->index,
- vstack_ax(stack), sizeof(*index));
- if (ret)
- goto end;
- next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64);
- break;
- }
-
- }
- }
-end:
- return ret;
-}
projects / lttng-modules.git / blobdiff