+++ /dev/null
-/*
- * lttng-filter-interpreter.c
- *
- * LTTng modules filter interpreter.
- *
- * 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/uaccess.h>
-#include <wrapper/frame.h>
-#include <wrapper/types.h>
-#include <linux/swab.h>
-
-#include <lttng-filter.h>
-#include <lttng-string-utils.h>
-
-LTTNG_STACK_FRAME_NON_STANDARD(lttng_filter_interpret_bytecode);
-
-/*
- * get_char should be called with page fault handler disabled if it is expected
- * to handle user-space read.
- */
-static
-char get_char(struct estack_entry *reg, size_t offset)
-{
- if (unlikely(offset >= reg->u.s.seq_len))
- return '\0';
- if (reg->u.s.user) {
- char c;
-
- /* Handle invalid access as end of string. */
- if (unlikely(!access_ok(VERIFY_READ,
- reg->u.s.user_str + offset,
- sizeof(c))))
- return '\0';
- /* Handle fault (nonzero return value) as end of string. */
- if (unlikely(__copy_from_user_inatomic(&c,
- reg->u.s.user_str + offset,
- sizeof(c))))
- return '\0';
- return c;
- } else {
- return reg->u.s.str[offset];
- }
-}
-
-/*
- * -1: wildcard found.
- * -2: unknown escape char.
- * 0: normal char.
- */
-static
-int parse_char(struct estack_entry *reg, char *c, size_t *offset)
-{
- switch (*c) {
- case '\\':
- (*offset)++;
- *c = get_char(reg, *offset);
- switch (*c) {
- case '\\':
- case '*':
- return 0;
- default:
- return -2;
- }
- case '*':
- return -1;
- default:
- return 0;
- }
-}
-
-static
-char get_char_at_cb(size_t at, void *data)
-{
- return get_char(data, at);
-}
-
-static
-int stack_star_glob_match(struct estack *stack, int top, const char *cmp_type)
-{
- bool has_user = false;
- mm_segment_t old_fs;
- int result;
- struct estack_entry *pattern_reg;
- struct estack_entry *candidate_reg;
-
- if (estack_bx(stack, top)->u.s.user
- || estack_ax(stack, top)->u.s.user) {
- has_user = true;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- pagefault_disable();
- }
-
- /* Find out which side is the pattern vs. the candidate. */
- if (estack_ax(stack, top)->u.s.literal_type == ESTACK_STRING_LITERAL_TYPE_STAR_GLOB) {
- pattern_reg = estack_ax(stack, top);
- candidate_reg = estack_bx(stack, top);
- } else {
- pattern_reg = estack_bx(stack, top);
- candidate_reg = estack_ax(stack, top);
- }
-
- /* Perform the match operation. */
- result = !strutils_star_glob_match_char_cb(get_char_at_cb,
- pattern_reg, get_char_at_cb, candidate_reg);
- if (has_user) {
- pagefault_enable();
- set_fs(old_fs);
- }
-
- return result;
-}
-
-static
-int stack_strcmp(struct estack *stack, int top, const char *cmp_type)
-{
- size_t offset_bx = 0, offset_ax = 0;
- int diff, has_user = 0;
- mm_segment_t old_fs;
-
- if (estack_bx(stack, top)->u.s.user
- || estack_ax(stack, top)->u.s.user) {
- has_user = 1;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- pagefault_disable();
- }
-
- for (;;) {
- int ret;
- int escaped_r0 = 0;
- char char_bx, char_ax;
-
- char_bx = get_char(estack_bx(stack, top), offset_bx);
- char_ax = get_char(estack_ax(stack, top), offset_ax);
-
- if (unlikely(char_bx == '\0')) {
- if (char_ax == '\0') {
- diff = 0;
- break;
- } else {
- if (estack_ax(stack, top)->u.s.literal_type ==
- ESTACK_STRING_LITERAL_TYPE_PLAIN) {
- ret = parse_char(estack_ax(stack, top),
- &char_ax, &offset_ax);
- if (ret == -1) {
- diff = 0;
- break;
- }
- }
- diff = -1;
- break;
- }
- }
- if (unlikely(char_ax == '\0')) {
- if (estack_bx(stack, top)->u.s.literal_type ==
- ESTACK_STRING_LITERAL_TYPE_PLAIN) {
- ret = parse_char(estack_bx(stack, top),
- &char_bx, &offset_bx);
- if (ret == -1) {
- diff = 0;
- break;
- }
- }
- diff = 1;
- break;
- }
- if (estack_bx(stack, top)->u.s.literal_type ==
- ESTACK_STRING_LITERAL_TYPE_PLAIN) {
- ret = parse_char(estack_bx(stack, top),
- &char_bx, &offset_bx);
- if (ret == -1) {
- diff = 0;
- break;
- } else if (ret == -2) {
- escaped_r0 = 1;
- }
- /* else compare both char */
- }
- if (estack_ax(stack, top)->u.s.literal_type ==
- ESTACK_STRING_LITERAL_TYPE_PLAIN) {
- ret = parse_char(estack_ax(stack, top),
- &char_ax, &offset_ax);
- if (ret == -1) {
- diff = 0;
- break;
- } else if (ret == -2) {
- if (!escaped_r0) {
- diff = -1;
- break;
- }
- } else {
- if (escaped_r0) {
- diff = 1;
- break;
- }
- }
- } else {
- if (escaped_r0) {
- diff = 1;
- break;
- }
- }
- diff = char_bx - char_ax;
- if (diff != 0)
- break;
- offset_bx++;
- offset_ax++;
- }
- if (has_user) {
- pagefault_enable();
- set_fs(old_fs);
- }
- return diff;
-}
-
-uint64_t lttng_filter_false(void *filter_data,
- struct lttng_probe_ctx *lttng_probe_ctx,
- const char *filter_stack_data)
-{
- return 0;
-}
-
-#ifdef INTERPRETER_USE_SWITCH
-
-/*
- * Fallback for compilers that do not support taking address of labels.
- */
-
-#define START_OP \
- start_pc = &bytecode->data[0]; \
- for (pc = next_pc = start_pc; pc - start_pc < bytecode->len; \
- pc = next_pc) { \
- dbg_printk("Executing op %s (%u)\n", \
- lttng_filter_print_op((unsigned int) *(filter_opcode_t *) pc), \
- (unsigned int) *(filter_opcode_t *) pc); \
- switch (*(filter_opcode_t *) pc) {
-
-#define OP(name) case name
-
-#define PO break
-
-#define END_OP } \
- }
-
-#else
-
-/*
- * Dispatch-table based interpreter.
- */
-
-#define START_OP \
- start_pc = &bytecode->code[0]; \
- pc = next_pc = start_pc; \
- if (unlikely(pc - start_pc >= bytecode->len)) \
- goto end; \
- goto *dispatch[*(filter_opcode_t *) pc];
-
-#define OP(name) \
-LABEL_##name
-
-#define PO \
- pc = next_pc; \
- goto *dispatch[*(filter_opcode_t *) pc];
-
-#define END_OP
-
-#endif
-
-static int context_get_index(struct lttng_probe_ctx *lttng_probe_ctx,
- struct load_ptr *ptr,
- uint32_t idx)
-{
-
- struct lttng_ctx_field *ctx_field;
- struct lttng_event_field *field;
- union lttng_ctx_value v;
-
- ctx_field = <tng_static_ctx->fields[idx];
- field = &ctx_field->event_field;
- ptr->type = LOAD_OBJECT;
- /* field is only used for types nested within variants. */
- ptr->field = NULL;
-
- switch (field->type.atype) {
- case atype_integer:
- ctx_field->get_value(ctx_field, lttng_probe_ctx, &v);
- if (field->type.u.basic.integer.signedness) {
- ptr->object_type = OBJECT_TYPE_S64;
- ptr->u.s64 = v.s64;
- ptr->ptr = &ptr->u.s64;
- } else {
- ptr->object_type = OBJECT_TYPE_U64;
- ptr->u.u64 = v.s64; /* Cast. */
- ptr->ptr = &ptr->u.u64;
- }
- break;
- case atype_enum:
- {
- const struct lttng_integer_type *itype =
- &field->type.u.basic.enumeration.container_type;
-
- ctx_field->get_value(ctx_field, lttng_probe_ctx, &v);
- if (itype->signedness) {
- ptr->object_type = OBJECT_TYPE_S64;
- ptr->u.s64 = v.s64;
- ptr->ptr = &ptr->u.s64;
- } else {
- ptr->object_type = OBJECT_TYPE_U64;
- ptr->u.u64 = v.s64; /* Cast. */
- ptr->ptr = &ptr->u.u64;
- }
- 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 (field->type.u.array.elem_type.u.basic.integer.encoding == lttng_encode_none) {
- printk(KERN_WARNING "Only string arrays are supported for contexts.\n");
- return -EINVAL;
- }
- ptr->object_type = OBJECT_TYPE_STRING;
- ctx_field->get_value(ctx_field, lttng_probe_ctx, &v);
- ptr->ptr = v.str;
- 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 (field->type.u.sequence.elem_type.u.basic.integer.encoding == lttng_encode_none) {
- printk(KERN_WARNING "Only string sequences are supported for contexts.\n");
- return -EINVAL;
- }
- ptr->object_type = OBJECT_TYPE_STRING;
- ctx_field->get_value(ctx_field, lttng_probe_ctx, &v);
- ptr->ptr = v.str;
- 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:
- ptr->object_type = OBJECT_TYPE_STRING;
- ctx_field->get_value(ctx_field, lttng_probe_ctx, &v);
- ptr->ptr = v.str;
- 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 dynamic_get_index(struct lttng_probe_ctx *lttng_probe_ctx,
- struct bytecode_runtime *runtime,
- uint64_t index, struct estack_entry *stack_top)
-{
- int ret;
- const struct filter_get_index_data *gid;
-
- /*
- * Types nested within variants need to perform dynamic lookup
- * based on the field descriptions. LTTng-UST does not implement
- * variants for now.
- */
- if (stack_top->u.ptr.field)
- return -EINVAL;
- gid = (const struct filter_get_index_data *) &runtime->data[index];
- switch (stack_top->u.ptr.type) {
- case LOAD_OBJECT:
- switch (stack_top->u.ptr.object_type) {
- case OBJECT_TYPE_ARRAY:
- {
- const char *ptr;
-
- WARN_ON_ONCE(gid->offset >= gid->array_len);
- /* Skip count (unsigned long) */
- ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long));
- ptr = ptr + gid->offset;
- stack_top->u.ptr.ptr = ptr;
- stack_top->u.ptr.object_type = gid->elem.type;
- stack_top->u.ptr.rev_bo = gid->elem.rev_bo;
- /* field is only used for types nested within variants. */
- stack_top->u.ptr.field = NULL;
- break;
- }
- case OBJECT_TYPE_SEQUENCE:
- {
- const char *ptr;
- size_t ptr_seq_len;
-
- ptr = *(const char **) (stack_top->u.ptr.ptr + sizeof(unsigned long));
- ptr_seq_len = *(unsigned long *) stack_top->u.ptr.ptr;
- if (gid->offset >= gid->elem.len * ptr_seq_len) {
- ret = -EINVAL;
- goto end;
- }
- ptr = ptr + gid->offset;
- stack_top->u.ptr.ptr = ptr;
- stack_top->u.ptr.object_type = gid->elem.type;
- stack_top->u.ptr.rev_bo = gid->elem.rev_bo;
- /* field is only used for types nested within variants. */
- stack_top->u.ptr.field = NULL;
- break;
- }
- case OBJECT_TYPE_STRUCT:
- printk(KERN_WARNING "Nested structures are not supported yet.\n");
- ret = -EINVAL;
- goto end;
- case OBJECT_TYPE_VARIANT:
- default:
- printk(KERN_WARNING "Unexpected get index type %d",
- (int) stack_top->u.ptr.object_type);
- ret = -EINVAL;
- goto end;
- }
- break;
- case LOAD_ROOT_CONTEXT:
- case LOAD_ROOT_APP_CONTEXT: /* Fall-through */
- {
- ret = context_get_index(lttng_probe_ctx,
- &stack_top->u.ptr,
- gid->ctx_index);
- if (ret) {
- goto end;
- }
- break;
- }
- case LOAD_ROOT_PAYLOAD:
- stack_top->u.ptr.ptr += gid->offset;
- if (gid->elem.type == OBJECT_TYPE_STRING)
- stack_top->u.ptr.ptr = *(const char * const *) stack_top->u.ptr.ptr;
- stack_top->u.ptr.object_type = gid->elem.type;
- stack_top->u.ptr.type = LOAD_OBJECT;
- /* field is only used for types nested within variants. */
- stack_top->u.ptr.field = NULL;
- break;
- }
- return 0;
-
-end:
- return ret;
-}
-
-static int dynamic_load_field(struct estack_entry *stack_top)
-{
- int ret;
-
- switch (stack_top->u.ptr.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->u.ptr.object_type) {
- case OBJECT_TYPE_S8:
- dbg_printk("op load field s8\n");
- stack_top->u.v = *(int8_t *) stack_top->u.ptr.ptr;
- break;
- case OBJECT_TYPE_S16:
- {
- int16_t tmp;
-
- dbg_printk("op load field s16\n");
- tmp = *(int16_t *) stack_top->u.ptr.ptr;
- if (stack_top->u.ptr.rev_bo)
- __swab16s(&tmp);
- stack_top->u.v = tmp;
- break;
- }
- case OBJECT_TYPE_S32:
- {
- int32_t tmp;
-
- dbg_printk("op load field s32\n");
- tmp = *(int32_t *) stack_top->u.ptr.ptr;
- if (stack_top->u.ptr.rev_bo)
- __swab32s(&tmp);
- stack_top->u.v = tmp;
- break;
- }
- case OBJECT_TYPE_S64:
- {
- int64_t tmp;
-
- dbg_printk("op load field s64\n");
- tmp = *(int64_t *) stack_top->u.ptr.ptr;
- if (stack_top->u.ptr.rev_bo)
- __swab64s(&tmp);
- stack_top->u.v = tmp;
- break;
- }
- case OBJECT_TYPE_U8:
- dbg_printk("op load field u8\n");
- stack_top->u.v = *(uint8_t *) stack_top->u.ptr.ptr;
- break;
- case OBJECT_TYPE_U16:
- {
- uint16_t tmp;
-
- dbg_printk("op load field s16\n");
- tmp = *(uint16_t *) stack_top->u.ptr.ptr;
- if (stack_top->u.ptr.rev_bo)
- __swab16s(&tmp);
- stack_top->u.v = tmp;
- break;
- }
- case OBJECT_TYPE_U32:
- {
- uint32_t tmp;
-
- dbg_printk("op load field u32\n");
- tmp = *(uint32_t *) stack_top->u.ptr.ptr;
- if (stack_top->u.ptr.rev_bo)
- __swab32s(&tmp);
- stack_top->u.v = tmp;
- break;
- }
- case OBJECT_TYPE_U64:
- {
- uint64_t tmp;
-
- dbg_printk("op load field u64\n");
- tmp = *(uint64_t *) stack_top->u.ptr.ptr;
- if (stack_top->u.ptr.rev_bo)
- __swab64s(&tmp);
- stack_top->u.v = tmp;
- break;
- }
- case OBJECT_TYPE_STRING:
- {
- const char *str;
-
- dbg_printk("op load field string\n");
- str = (const char *) stack_top->u.ptr.ptr;
- stack_top->u.s.str = str;
- if (unlikely(!stack_top->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL string.\n");
- ret = -EINVAL;
- goto end;
- }
- stack_top->u.s.seq_len = SIZE_MAX;
- stack_top->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- break;
- }
- case OBJECT_TYPE_STRING_SEQUENCE:
- {
- const char *ptr;
-
- dbg_printk("op load field string sequence\n");
- ptr = stack_top->u.ptr.ptr;
- stack_top->u.s.seq_len = *(unsigned long *) ptr;
- stack_top->u.s.str = *(const char **) (ptr + sizeof(unsigned long));
- if (unlikely(!stack_top->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL sequence.\n");
- ret = -EINVAL;
- goto end;
- }
- stack_top->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- break;
- }
- case OBJECT_TYPE_DYNAMIC:
- /*
- * Dynamic types in context are looked up
- * by context get index.
- */
- ret = -EINVAL;
- goto end;
- case OBJECT_TYPE_DOUBLE:
- 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;
-}
-
-/*
- * Return 0 (discard), or raise the 0x1 flag (log event).
- * Currently, other flags are kept for future extensions and have no
- * effect.
- */
-uint64_t lttng_filter_interpret_bytecode(void *filter_data,
- struct lttng_probe_ctx *lttng_probe_ctx,
- const char *filter_stack_data)
-{
- struct bytecode_runtime *bytecode = filter_data;
- void *pc, *next_pc, *start_pc;
- int ret = -EINVAL;
- uint64_t retval = 0;
- struct estack _stack;
- struct estack *stack = &_stack;
- register int64_t ax = 0, bx = 0;
- register int top = FILTER_STACK_EMPTY;
-#ifndef INTERPRETER_USE_SWITCH
- static void *dispatch[NR_FILTER_OPS] = {
- [ FILTER_OP_UNKNOWN ] = &&LABEL_FILTER_OP_UNKNOWN,
-
- [ FILTER_OP_RETURN ] = &&LABEL_FILTER_OP_RETURN,
-
- /* binary */
- [ FILTER_OP_MUL ] = &&LABEL_FILTER_OP_MUL,
- [ FILTER_OP_DIV ] = &&LABEL_FILTER_OP_DIV,
- [ FILTER_OP_MOD ] = &&LABEL_FILTER_OP_MOD,
- [ FILTER_OP_PLUS ] = &&LABEL_FILTER_OP_PLUS,
- [ FILTER_OP_MINUS ] = &&LABEL_FILTER_OP_MINUS,
- [ FILTER_OP_BIT_RSHIFT ] = &&LABEL_FILTER_OP_BIT_RSHIFT,
- [ FILTER_OP_BIT_LSHIFT ] = &&LABEL_FILTER_OP_BIT_LSHIFT,
- [ FILTER_OP_BIT_AND ] = &&LABEL_FILTER_OP_BIT_AND,
- [ FILTER_OP_BIT_OR ] = &&LABEL_FILTER_OP_BIT_OR,
- [ FILTER_OP_BIT_XOR ] = &&LABEL_FILTER_OP_BIT_XOR,
-
- /* binary comparators */
- [ FILTER_OP_EQ ] = &&LABEL_FILTER_OP_EQ,
- [ FILTER_OP_NE ] = &&LABEL_FILTER_OP_NE,
- [ FILTER_OP_GT ] = &&LABEL_FILTER_OP_GT,
- [ FILTER_OP_LT ] = &&LABEL_FILTER_OP_LT,
- [ FILTER_OP_GE ] = &&LABEL_FILTER_OP_GE,
- [ FILTER_OP_LE ] = &&LABEL_FILTER_OP_LE,
-
- /* string binary comparator */
- [ FILTER_OP_EQ_STRING ] = &&LABEL_FILTER_OP_EQ_STRING,
- [ FILTER_OP_NE_STRING ] = &&LABEL_FILTER_OP_NE_STRING,
- [ FILTER_OP_GT_STRING ] = &&LABEL_FILTER_OP_GT_STRING,
- [ FILTER_OP_LT_STRING ] = &&LABEL_FILTER_OP_LT_STRING,
- [ FILTER_OP_GE_STRING ] = &&LABEL_FILTER_OP_GE_STRING,
- [ FILTER_OP_LE_STRING ] = &&LABEL_FILTER_OP_LE_STRING,
-
- /* globbing pattern binary comparator */
- [ FILTER_OP_EQ_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_EQ_STAR_GLOB_STRING,
- [ FILTER_OP_NE_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_NE_STAR_GLOB_STRING,
-
- /* s64 binary comparator */
- [ FILTER_OP_EQ_S64 ] = &&LABEL_FILTER_OP_EQ_S64,
- [ FILTER_OP_NE_S64 ] = &&LABEL_FILTER_OP_NE_S64,
- [ FILTER_OP_GT_S64 ] = &&LABEL_FILTER_OP_GT_S64,
- [ FILTER_OP_LT_S64 ] = &&LABEL_FILTER_OP_LT_S64,
- [ FILTER_OP_GE_S64 ] = &&LABEL_FILTER_OP_GE_S64,
- [ FILTER_OP_LE_S64 ] = &&LABEL_FILTER_OP_LE_S64,
-
- /* double binary comparator */
- [ FILTER_OP_EQ_DOUBLE ] = &&LABEL_FILTER_OP_EQ_DOUBLE,
- [ FILTER_OP_NE_DOUBLE ] = &&LABEL_FILTER_OP_NE_DOUBLE,
- [ FILTER_OP_GT_DOUBLE ] = &&LABEL_FILTER_OP_GT_DOUBLE,
- [ FILTER_OP_LT_DOUBLE ] = &&LABEL_FILTER_OP_LT_DOUBLE,
- [ FILTER_OP_GE_DOUBLE ] = &&LABEL_FILTER_OP_GE_DOUBLE,
- [ FILTER_OP_LE_DOUBLE ] = &&LABEL_FILTER_OP_LE_DOUBLE,
-
- /* Mixed S64-double binary comparators */
- [ FILTER_OP_EQ_DOUBLE_S64 ] = &&LABEL_FILTER_OP_EQ_DOUBLE_S64,
- [ FILTER_OP_NE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_NE_DOUBLE_S64,
- [ FILTER_OP_GT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GT_DOUBLE_S64,
- [ FILTER_OP_LT_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LT_DOUBLE_S64,
- [ FILTER_OP_GE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_GE_DOUBLE_S64,
- [ FILTER_OP_LE_DOUBLE_S64 ] = &&LABEL_FILTER_OP_LE_DOUBLE_S64,
-
- [ FILTER_OP_EQ_S64_DOUBLE ] = &&LABEL_FILTER_OP_EQ_S64_DOUBLE,
- [ FILTER_OP_NE_S64_DOUBLE ] = &&LABEL_FILTER_OP_NE_S64_DOUBLE,
- [ FILTER_OP_GT_S64_DOUBLE ] = &&LABEL_FILTER_OP_GT_S64_DOUBLE,
- [ FILTER_OP_LT_S64_DOUBLE ] = &&LABEL_FILTER_OP_LT_S64_DOUBLE,
- [ FILTER_OP_GE_S64_DOUBLE ] = &&LABEL_FILTER_OP_GE_S64_DOUBLE,
- [ FILTER_OP_LE_S64_DOUBLE ] = &&LABEL_FILTER_OP_LE_S64_DOUBLE,
-
- /* unary */
- [ FILTER_OP_UNARY_PLUS ] = &&LABEL_FILTER_OP_UNARY_PLUS,
- [ FILTER_OP_UNARY_MINUS ] = &&LABEL_FILTER_OP_UNARY_MINUS,
- [ FILTER_OP_UNARY_NOT ] = &&LABEL_FILTER_OP_UNARY_NOT,
- [ FILTER_OP_UNARY_PLUS_S64 ] = &&LABEL_FILTER_OP_UNARY_PLUS_S64,
- [ FILTER_OP_UNARY_MINUS_S64 ] = &&LABEL_FILTER_OP_UNARY_MINUS_S64,
- [ FILTER_OP_UNARY_NOT_S64 ] = &&LABEL_FILTER_OP_UNARY_NOT_S64,
- [ FILTER_OP_UNARY_PLUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_PLUS_DOUBLE,
- [ FILTER_OP_UNARY_MINUS_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_MINUS_DOUBLE,
- [ FILTER_OP_UNARY_NOT_DOUBLE ] = &&LABEL_FILTER_OP_UNARY_NOT_DOUBLE,
-
- /* logical */
- [ FILTER_OP_AND ] = &&LABEL_FILTER_OP_AND,
- [ FILTER_OP_OR ] = &&LABEL_FILTER_OP_OR,
-
- /* load field ref */
- [ FILTER_OP_LOAD_FIELD_REF ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF,
- [ FILTER_OP_LOAD_FIELD_REF_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_STRING,
- [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_SEQUENCE,
- [ FILTER_OP_LOAD_FIELD_REF_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_S64,
- [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_DOUBLE,
-
- /* load from immediate operand */
- [ FILTER_OP_LOAD_STRING ] = &&LABEL_FILTER_OP_LOAD_STRING,
- [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = &&LABEL_FILTER_OP_LOAD_STAR_GLOB_STRING,
- [ FILTER_OP_LOAD_S64 ] = &&LABEL_FILTER_OP_LOAD_S64,
- [ FILTER_OP_LOAD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_DOUBLE,
-
- /* cast */
- [ FILTER_OP_CAST_TO_S64 ] = &&LABEL_FILTER_OP_CAST_TO_S64,
- [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = &&LABEL_FILTER_OP_CAST_DOUBLE_TO_S64,
- [ FILTER_OP_CAST_NOP ] = &&LABEL_FILTER_OP_CAST_NOP,
-
- /* get context ref */
- [ FILTER_OP_GET_CONTEXT_REF ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF,
- [ FILTER_OP_GET_CONTEXT_REF_STRING ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_STRING,
- [ FILTER_OP_GET_CONTEXT_REF_S64 ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_S64,
- [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = &&LABEL_FILTER_OP_GET_CONTEXT_REF_DOUBLE,
-
- /* load userspace field ref */
- [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_STRING,
- [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE,
-
- /* Instructions for recursive traversal through composed types. */
- [ FILTER_OP_GET_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_CONTEXT_ROOT,
- [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = &&LABEL_FILTER_OP_GET_APP_CONTEXT_ROOT,
- [ FILTER_OP_GET_PAYLOAD_ROOT ] = &&LABEL_FILTER_OP_GET_PAYLOAD_ROOT,
-
- [ FILTER_OP_GET_SYMBOL ] = &&LABEL_FILTER_OP_GET_SYMBOL,
- [ FILTER_OP_GET_SYMBOL_FIELD ] = &&LABEL_FILTER_OP_GET_SYMBOL_FIELD,
- [ FILTER_OP_GET_INDEX_U16 ] = &&LABEL_FILTER_OP_GET_INDEX_U16,
- [ FILTER_OP_GET_INDEX_U64 ] = &&LABEL_FILTER_OP_GET_INDEX_U64,
-
- [ FILTER_OP_LOAD_FIELD ] = &&LABEL_FILTER_OP_LOAD_FIELD,
- [ FILTER_OP_LOAD_FIELD_S8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S8,
- [ FILTER_OP_LOAD_FIELD_S16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S16,
- [ FILTER_OP_LOAD_FIELD_S32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S32,
- [ FILTER_OP_LOAD_FIELD_S64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_S64,
- [ FILTER_OP_LOAD_FIELD_U8 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U8,
- [ FILTER_OP_LOAD_FIELD_U16 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U16,
- [ FILTER_OP_LOAD_FIELD_U32 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U32,
- [ FILTER_OP_LOAD_FIELD_U64 ] = &&LABEL_FILTER_OP_LOAD_FIELD_U64,
- [ FILTER_OP_LOAD_FIELD_STRING ] = &&LABEL_FILTER_OP_LOAD_FIELD_STRING,
- [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = &&LABEL_FILTER_OP_LOAD_FIELD_SEQUENCE,
- [ FILTER_OP_LOAD_FIELD_DOUBLE ] = &&LABEL_FILTER_OP_LOAD_FIELD_DOUBLE,
-
- [ FILTER_OP_UNARY_BIT_NOT ] = &&LABEL_FILTER_OP_UNARY_BIT_NOT,
- };
-#endif /* #ifndef INTERPRETER_USE_SWITCH */
-
- START_OP
-
- OP(FILTER_OP_UNKNOWN):
- OP(FILTER_OP_LOAD_FIELD_REF):
- OP(FILTER_OP_GET_CONTEXT_REF):
-#ifdef INTERPRETER_USE_SWITCH
- default:
-#endif /* INTERPRETER_USE_SWITCH */
- printk(KERN_WARNING "unknown bytecode op %u\n",
- (unsigned int) *(filter_opcode_t *) pc);
- ret = -EINVAL;
- goto end;
-
- OP(FILTER_OP_RETURN):
- /* LTTNG_FILTER_DISCARD or LTTNG_FILTER_RECORD_FLAG */
- retval = !!estack_ax_v;
- ret = 0;
- goto end;
-
- /* binary */
- OP(FILTER_OP_MUL):
- OP(FILTER_OP_DIV):
- OP(FILTER_OP_MOD):
- OP(FILTER_OP_PLUS):
- OP(FILTER_OP_MINUS):
- printk(KERN_WARNING "unsupported bytecode op %u\n",
- (unsigned int) *(filter_opcode_t *) pc);
- ret = -EINVAL;
- goto end;
-
- OP(FILTER_OP_EQ):
- OP(FILTER_OP_NE):
- OP(FILTER_OP_GT):
- OP(FILTER_OP_LT):
- OP(FILTER_OP_GE):
- OP(FILTER_OP_LE):
- printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n",
- (unsigned int) *(filter_opcode_t *) pc);
- ret = -EINVAL;
- goto end;
-
- OP(FILTER_OP_EQ_STRING):
- {
- int res;
-
- res = (stack_strcmp(stack, top, "==") == 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_NE_STRING):
- {
- int res;
-
- res = (stack_strcmp(stack, top, "!=") != 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_GT_STRING):
- {
- int res;
-
- res = (stack_strcmp(stack, top, ">") > 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_LT_STRING):
- {
- int res;
-
- res = (stack_strcmp(stack, top, "<") < 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_GE_STRING):
- {
- int res;
-
- res = (stack_strcmp(stack, top, ">=") >= 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_LE_STRING):
- {
- int res;
-
- res = (stack_strcmp(stack, top, "<=") <= 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
-
- OP(FILTER_OP_EQ_STAR_GLOB_STRING):
- {
- int res;
-
- res = (stack_star_glob_match(stack, top, "==") == 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_NE_STAR_GLOB_STRING):
- {
- int res;
-
- res = (stack_star_glob_match(stack, top, "!=") != 0);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
-
- OP(FILTER_OP_EQ_S64):
- {
- int res;
-
- res = (estack_bx_v == estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_NE_S64):
- {
- int res;
-
- res = (estack_bx_v != estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_GT_S64):
- {
- int res;
-
- res = (estack_bx_v > estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_LT_S64):
- {
- int res;
-
- res = (estack_bx_v < estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_GE_S64):
- {
- int res;
-
- res = (estack_bx_v >= estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_LE_S64):
- {
- int res;
-
- res = (estack_bx_v <= estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
-
- OP(FILTER_OP_EQ_DOUBLE):
- OP(FILTER_OP_NE_DOUBLE):
- OP(FILTER_OP_GT_DOUBLE):
- OP(FILTER_OP_LT_DOUBLE):
- OP(FILTER_OP_GE_DOUBLE):
- OP(FILTER_OP_LE_DOUBLE):
- {
- BUG_ON(1);
- PO;
- }
-
- /* Mixed S64-double binary comparators */
- OP(FILTER_OP_EQ_DOUBLE_S64):
- OP(FILTER_OP_NE_DOUBLE_S64):
- OP(FILTER_OP_GT_DOUBLE_S64):
- OP(FILTER_OP_LT_DOUBLE_S64):
- OP(FILTER_OP_GE_DOUBLE_S64):
- OP(FILTER_OP_LE_DOUBLE_S64):
- OP(FILTER_OP_EQ_S64_DOUBLE):
- OP(FILTER_OP_NE_S64_DOUBLE):
- OP(FILTER_OP_GT_S64_DOUBLE):
- OP(FILTER_OP_LT_S64_DOUBLE):
- OP(FILTER_OP_GE_S64_DOUBLE):
- OP(FILTER_OP_LE_S64_DOUBLE):
- {
- BUG_ON(1);
- PO;
- }
- OP(FILTER_OP_BIT_RSHIFT):
- {
- int64_t res;
-
- /* Catch undefined behavior. */
- if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) {
- ret = -EINVAL;
- goto end;
- }
- res = ((uint64_t) estack_bx_v >> (uint32_t) estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_BIT_LSHIFT):
- {
- int64_t res;
-
- /* Catch undefined behavior. */
- if (unlikely(estack_ax_v < 0 || estack_ax_v >= 64)) {
- ret = -EINVAL;
- goto end;
- }
- res = ((uint64_t) estack_bx_v << (uint32_t) estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_BIT_AND):
- {
- int64_t res;
-
- res = ((uint64_t) estack_bx_v & (uint64_t) estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_BIT_OR):
- {
- int64_t res;
-
- res = ((uint64_t) estack_bx_v | (uint64_t) estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
- OP(FILTER_OP_BIT_XOR):
- {
- int64_t res;
-
- res = ((uint64_t) estack_bx_v ^ (uint64_t) estack_ax_v);
- estack_pop(stack, top, ax, bx);
- estack_ax_v = res;
- next_pc += sizeof(struct binary_op);
- PO;
- }
-
- /* unary */
- OP(FILTER_OP_UNARY_PLUS):
- OP(FILTER_OP_UNARY_MINUS):
- OP(FILTER_OP_UNARY_NOT):
- printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n",
- (unsigned int) *(filter_opcode_t *) pc);
- ret = -EINVAL;
- goto end;
-
-
- OP(FILTER_OP_UNARY_BIT_NOT):
- {
- estack_ax_v = ~(uint64_t) estack_ax_v;
- next_pc += sizeof(struct unary_op);
- PO;
- }
-
- OP(FILTER_OP_UNARY_PLUS_S64):
- {
- next_pc += sizeof(struct unary_op);
- PO;
- }
- OP(FILTER_OP_UNARY_MINUS_S64):
- {
- estack_ax_v = -estack_ax_v;
- next_pc += sizeof(struct unary_op);
- PO;
- }
- OP(FILTER_OP_UNARY_PLUS_DOUBLE):
- OP(FILTER_OP_UNARY_MINUS_DOUBLE):
- {
- BUG_ON(1);
- PO;
- }
- OP(FILTER_OP_UNARY_NOT_S64):
- {
- estack_ax_v = !estack_ax_v;
- next_pc += sizeof(struct unary_op);
- PO;
- }
- OP(FILTER_OP_UNARY_NOT_DOUBLE):
- {
- BUG_ON(1);
- PO;
- }
-
- /* logical */
- OP(FILTER_OP_AND):
- {
- struct logical_op *insn = (struct logical_op *) pc;
-
- /* If AX is 0, skip and evaluate to 0 */
- if (unlikely(estack_ax_v == 0)) {
- dbg_printk("Jumping to bytecode offset %u\n",
- (unsigned int) insn->skip_offset);
- next_pc = start_pc + insn->skip_offset;
- } else {
- /* Pop 1 when jump not taken */
- estack_pop(stack, top, ax, bx);
- next_pc += sizeof(struct logical_op);
- }
- PO;
- }
- OP(FILTER_OP_OR):
- {
- struct logical_op *insn = (struct logical_op *) pc;
-
- /* If AX is nonzero, skip and evaluate to 1 */
-
- if (unlikely(estack_ax_v != 0)) {
- estack_ax_v = 1;
- dbg_printk("Jumping to bytecode offset %u\n",
- (unsigned int) insn->skip_offset);
- next_pc = start_pc + insn->skip_offset;
- } else {
- /* Pop 1 when jump not taken */
- estack_pop(stack, top, ax, bx);
- next_pc += sizeof(struct logical_op);
- }
- PO;
- }
-
-
- /* load field ref */
- OP(FILTER_OP_LOAD_FIELD_REF_STRING):
- {
- struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
-
- dbg_printk("load field ref offset %u type string\n",
- ref->offset);
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.s.str =
- *(const char * const *) &filter_stack_data[ref->offset];
- if (unlikely(!estack_ax(stack, top)->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL string.\n");
- ret = -EINVAL;
- goto end;
- }
- estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX;
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- estack_ax(stack, top)->u.s.user = 0;
- dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str);
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- PO;
- }
-
- OP(FILTER_OP_LOAD_FIELD_REF_SEQUENCE):
- {
- struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
-
- dbg_printk("load field ref offset %u type sequence\n",
- ref->offset);
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.s.seq_len =
- *(unsigned long *) &filter_stack_data[ref->offset];
- estack_ax(stack, top)->u.s.str =
- *(const char **) (&filter_stack_data[ref->offset
- + sizeof(unsigned long)]);
- if (unlikely(!estack_ax(stack, top)->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL sequence.\n");
- ret = -EINVAL;
- goto end;
- }
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- estack_ax(stack, top)->u.s.user = 0;
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- PO;
- }
-
- OP(FILTER_OP_LOAD_FIELD_REF_S64):
- {
- struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
-
- dbg_printk("load field ref offset %u type s64\n",
- ref->offset);
- estack_push(stack, top, ax, bx);
- estack_ax_v =
- ((struct literal_numeric *) &filter_stack_data[ref->offset])->v;
- dbg_printk("ref load s64 %lld\n",
- (long long) estack_ax_v);
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- PO;
- }
-
- OP(FILTER_OP_LOAD_FIELD_REF_DOUBLE):
- {
- BUG_ON(1);
- PO;
- }
-
- /* load from immediate operand */
- OP(FILTER_OP_LOAD_STRING):
- {
- struct load_op *insn = (struct load_op *) pc;
-
- dbg_printk("load string %s\n", insn->data);
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.s.str = insn->data;
- estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX;
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_PLAIN;
- estack_ax(stack, top)->u.s.user = 0;
- next_pc += sizeof(struct load_op) + strlen(insn->data) + 1;
- PO;
- }
-
- OP(FILTER_OP_LOAD_STAR_GLOB_STRING):
- {
- struct load_op *insn = (struct load_op *) pc;
-
- dbg_printk("load globbing pattern %s\n", insn->data);
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.s.str = insn->data;
- estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX;
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_STAR_GLOB;
- estack_ax(stack, top)->u.s.user = 0;
- next_pc += sizeof(struct load_op) + strlen(insn->data) + 1;
- PO;
- }
-
- OP(FILTER_OP_LOAD_S64):
- {
- struct load_op *insn = (struct load_op *) pc;
-
- estack_push(stack, top, ax, bx);
- estack_ax_v = ((struct literal_numeric *) insn->data)->v;
- dbg_printk("load s64 %lld\n",
- (long long) estack_ax_v);
- next_pc += sizeof(struct load_op)
- + sizeof(struct literal_numeric);
- PO;
- }
-
- OP(FILTER_OP_LOAD_DOUBLE):
- {
- BUG_ON(1);
- PO;
- }
-
- /* cast */
- OP(FILTER_OP_CAST_TO_S64):
- printk(KERN_WARNING "unsupported non-specialized bytecode op %u\n",
- (unsigned int) *(filter_opcode_t *) pc);
- ret = -EINVAL;
- goto end;
-
- OP(FILTER_OP_CAST_DOUBLE_TO_S64):
- {
- BUG_ON(1);
- PO;
- }
-
- OP(FILTER_OP_CAST_NOP):
- {
- next_pc += sizeof(struct cast_op);
- PO;
- }
-
- /* get context ref */
- OP(FILTER_OP_GET_CONTEXT_REF_STRING):
- {
- struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
- struct lttng_ctx_field *ctx_field;
- union lttng_ctx_value v;
-
- dbg_printk("get context ref offset %u type string\n",
- ref->offset);
- ctx_field = <tng_static_ctx->fields[ref->offset];
- ctx_field->get_value(ctx_field, lttng_probe_ctx, &v);
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.s.str = v.str;
- if (unlikely(!estack_ax(stack, top)->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL string.\n");
- ret = -EINVAL;
- goto end;
- }
- estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX;
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- estack_ax(stack, top)->u.s.user = 0;
- dbg_printk("ref get context string %s\n", estack_ax(stack, top)->u.s.str);
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- PO;
- }
-
- OP(FILTER_OP_GET_CONTEXT_REF_S64):
- {
- struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
- struct lttng_ctx_field *ctx_field;
- union lttng_ctx_value v;
-
- dbg_printk("get context ref offset %u type s64\n",
- ref->offset);
- ctx_field = <tng_static_ctx->fields[ref->offset];
- ctx_field->get_value(ctx_field, lttng_probe_ctx, &v);
- estack_push(stack, top, ax, bx);
- estack_ax_v = v.s64;
- dbg_printk("ref get context s64 %lld\n",
- (long long) estack_ax_v);
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- PO;
- }
-
- OP(FILTER_OP_GET_CONTEXT_REF_DOUBLE):
- {
- BUG_ON(1);
- PO;
- }
-
- /* load userspace field ref */
- OP(FILTER_OP_LOAD_FIELD_REF_USER_STRING):
- {
- struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
-
- dbg_printk("load field ref offset %u type user string\n",
- ref->offset);
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.s.user_str =
- *(const char * const *) &filter_stack_data[ref->offset];
- if (unlikely(!estack_ax(stack, top)->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL string.\n");
- ret = -EINVAL;
- goto end;
- }
- estack_ax(stack, top)->u.s.seq_len = LTTNG_SIZE_MAX;
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- estack_ax(stack, top)->u.s.user = 1;
- dbg_printk("ref load string %s\n", estack_ax(stack, top)->u.s.str);
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- PO;
- }
-
- OP(FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE):
- {
- struct load_op *insn = (struct load_op *) pc;
- struct field_ref *ref = (struct field_ref *) insn->data;
-
- dbg_printk("load field ref offset %u type user sequence\n",
- ref->offset);
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.s.seq_len =
- *(unsigned long *) &filter_stack_data[ref->offset];
- estack_ax(stack, top)->u.s.user_str =
- *(const char **) (&filter_stack_data[ref->offset
- + sizeof(unsigned long)]);
- if (unlikely(!estack_ax(stack, top)->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL sequence.\n");
- ret = -EINVAL;
- goto end;
- }
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- estack_ax(stack, top)->u.s.user = 1;
- next_pc += sizeof(struct load_op) + sizeof(struct field_ref);
- PO;
- }
-
- OP(FILTER_OP_GET_CONTEXT_ROOT):
- {
- dbg_printk("op get context root\n");
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_CONTEXT;
- /* "field" only needed for variants. */
- estack_ax(stack, top)->u.ptr.field = NULL;
- next_pc += sizeof(struct load_op);
- PO;
- }
-
- OP(FILTER_OP_GET_APP_CONTEXT_ROOT):
- {
- BUG_ON(1);
- PO;
- }
-
- OP(FILTER_OP_GET_PAYLOAD_ROOT):
- {
- dbg_printk("op get app payload root\n");
- estack_push(stack, top, ax, bx);
- estack_ax(stack, top)->u.ptr.type = LOAD_ROOT_PAYLOAD;
- estack_ax(stack, top)->u.ptr.ptr = filter_stack_data;
- /* "field" only needed for variants. */
- estack_ax(stack, top)->u.ptr.field = NULL;
- next_pc += sizeof(struct load_op);
- PO;
- }
-
- OP(FILTER_OP_GET_SYMBOL):
- {
- dbg_printk("op get symbol\n");
- switch (estack_ax(stack, top)->u.ptr.type) {
- case LOAD_OBJECT:
- printk(KERN_WARNING "Nested fields not implemented yet.\n");
- ret = -EINVAL;
- goto end;
- case LOAD_ROOT_CONTEXT:
- case LOAD_ROOT_APP_CONTEXT:
- case LOAD_ROOT_PAYLOAD:
- /*
- * symbol lookup is performed by
- * specialization.
- */
- ret = -EINVAL;
- goto end;
- }
- next_pc += sizeof(struct load_op) + sizeof(struct get_symbol);
- PO;
- }
-
- OP(FILTER_OP_GET_SYMBOL_FIELD):
- {
- /*
- * Used for first variant encountered in a
- * traversal. Variants are not implemented yet.
- */
- ret = -EINVAL;
- goto end;
- }
-
- OP(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");
- ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top));
- if (ret)
- goto end;
- estack_ax_v = estack_ax(stack, top)->u.v;
- next_pc += sizeof(struct load_op) + sizeof(struct get_index_u16);
- PO;
- }
-
- OP(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");
- ret = dynamic_get_index(lttng_probe_ctx, bytecode, index->index, estack_ax(stack, top));
- if (ret)
- goto end;
- estack_ax_v = estack_ax(stack, top)->u.v;
- next_pc += sizeof(struct load_op) + sizeof(struct get_index_u64);
- PO;
- }
-
- OP(FILTER_OP_LOAD_FIELD):
- {
- dbg_printk("op load field\n");
- ret = dynamic_load_field(estack_ax(stack, top));
- if (ret)
- goto end;
- estack_ax_v = estack_ax(stack, top)->u.v;
- next_pc += sizeof(struct load_op);
- PO;
- }
-
- OP(FILTER_OP_LOAD_FIELD_S8):
- {
- dbg_printk("op load field s8\n");
-
- estack_ax_v = *(int8_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_S16):
- {
- dbg_printk("op load field s16\n");
-
- estack_ax_v = *(int16_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_S32):
- {
- dbg_printk("op load field s32\n");
-
- estack_ax_v = *(int32_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_S64):
- {
- dbg_printk("op load field s64\n");
-
- estack_ax_v = *(int64_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_U8):
- {
- dbg_printk("op load field u8\n");
-
- estack_ax_v = *(uint8_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_U16):
- {
- dbg_printk("op load field u16\n");
-
- estack_ax_v = *(uint16_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_U32):
- {
- dbg_printk("op load field u32\n");
-
- estack_ax_v = *(uint32_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_U64):
- {
- dbg_printk("op load field u64\n");
-
- estack_ax_v = *(uint64_t *) estack_ax(stack, top)->u.ptr.ptr;
- next_pc += sizeof(struct load_op);
- PO;
- }
- OP(FILTER_OP_LOAD_FIELD_DOUBLE):
- {
- ret = -EINVAL;
- goto end;
- }
-
- OP(FILTER_OP_LOAD_FIELD_STRING):
- {
- const char *str;
-
- dbg_printk("op load field string\n");
- str = (const char *) estack_ax(stack, top)->u.ptr.ptr;
- estack_ax(stack, top)->u.s.str = str;
- if (unlikely(!estack_ax(stack, top)->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL string.\n");
- ret = -EINVAL;
- goto end;
- }
- estack_ax(stack, top)->u.s.seq_len = SIZE_MAX;
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- next_pc += sizeof(struct load_op);
- PO;
- }
-
- OP(FILTER_OP_LOAD_FIELD_SEQUENCE):
- {
- const char *ptr;
-
- dbg_printk("op load field string sequence\n");
- ptr = estack_ax(stack, top)->u.ptr.ptr;
- estack_ax(stack, top)->u.s.seq_len = *(unsigned long *) ptr;
- estack_ax(stack, top)->u.s.str = *(const char **) (ptr + sizeof(unsigned long));
- if (unlikely(!estack_ax(stack, top)->u.s.str)) {
- dbg_printk("Filter warning: loading a NULL sequence.\n");
- ret = -EINVAL;
- goto end;
- }
- estack_ax(stack, top)->u.s.literal_type =
- ESTACK_STRING_LITERAL_TYPE_NONE;
- next_pc += sizeof(struct load_op);
- PO;
- }
-
- END_OP
-end:
- /* return 0 (discard) on error */
- if (ret)
- return 0;
- return retval;
-}
-
-#undef START_OP
-#undef OP
-#undef PO
-#undef END_OP
projects / lttng-modules.git / blobdiff