X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=lttng-filter.c;h=12c22644f26989f942c6f20f9527ade9c3a3a0a9;hb=4f47ccf08dfac3d5db7553eb8b40bdab19764727;hp=3193d6ba3a95e1d0d6dae2f8bd9621e4f61f2e54;hpb=bbf3aef542f1d86cb2a2a304444ef7529d01eb6b;p=lttng-modules.git diff --git a/lttng-filter.c b/lttng-filter.c index 3193d6ba..12c22644 100644 --- a/lttng-filter.c +++ b/lttng-filter.c @@ -1,33 +1,16 @@ -/* +/* SPDX-License-Identifier: MIT + * * lttng-filter.c * * LTTng modules filter code. * * Copyright (C) 2010-2016 Mathieu Desnoyers - * - * 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 #include -#include +#include static const char *opnames[] = { [ FILTER_OP_UNKNOWN ] = "UNKNOWN", @@ -40,11 +23,11 @@ static const char *opnames[] = { [ FILTER_OP_MOD ] = "MOD", [ FILTER_OP_PLUS ] = "PLUS", [ FILTER_OP_MINUS ] = "MINUS", - [ FILTER_OP_RSHIFT ] = "RSHIFT", - [ FILTER_OP_LSHIFT ] = "LSHIFT", - [ FILTER_OP_BIN_AND ] = "BIN_AND", - [ FILTER_OP_BIN_OR ] = "BIN_OR", - [ FILTER_OP_BIN_XOR ] = "BIN_XOR", + [ FILTER_OP_BIT_RSHIFT ] = "BIT_RSHIFT", + [ FILTER_OP_BIT_LSHIFT ] = "BIT_LSHIFT", + [ FILTER_OP_BIT_AND ] = "BIT_AND", + [ FILTER_OP_BIT_OR ] = "BIT_OR", + [ FILTER_OP_BIT_XOR ] = "BIT_XOR", /* binary comparators */ [ FILTER_OP_EQ ] = "EQ", @@ -134,6 +117,45 @@ static const char *opnames[] = { /* load userspace field ref */ [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = "LOAD_FIELD_REF_USER_STRING", [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = "LOAD_FIELD_REF_USER_SEQUENCE", + + /* + * load immediate star globbing pattern (literal string) + * from immediate. + */ + [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = "LOAD_STAR_GLOB_STRING", + + /* globbing pattern binary operator: apply to */ + [ FILTER_OP_EQ_STAR_GLOB_STRING ] = "EQ_STAR_GLOB_STRING", + [ FILTER_OP_NE_STAR_GLOB_STRING ] = "NE_STAR_GLOB_STRING", + + /* + * Instructions for recursive traversal through composed types. + */ + [ FILTER_OP_GET_CONTEXT_ROOT ] = "GET_CONTEXT_ROOT", + [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = "GET_APP_CONTEXT_ROOT", + [ FILTER_OP_GET_PAYLOAD_ROOT ] = "GET_PAYLOAD_ROOT", + + [ FILTER_OP_GET_SYMBOL ] = "GET_SYMBOL", + [ FILTER_OP_GET_SYMBOL_FIELD ] = "GET_SYMBOL_FIELD", + [ FILTER_OP_GET_INDEX_U16 ] = "GET_INDEX_U16", + [ FILTER_OP_GET_INDEX_U64 ] = "GET_INDEX_U64", + + [ FILTER_OP_LOAD_FIELD ] = "LOAD_FIELD", + [ FILTER_OP_LOAD_FIELD_S8 ] = "LOAD_FIELD_S8", + [ FILTER_OP_LOAD_FIELD_S16 ] = "LOAD_FIELD_S16", + [ FILTER_OP_LOAD_FIELD_S32 ] = "LOAD_FIELD_S32", + [ FILTER_OP_LOAD_FIELD_S64 ] = "LOAD_FIELD_S64", + [ FILTER_OP_LOAD_FIELD_U8 ] = "LOAD_FIELD_U8", + [ FILTER_OP_LOAD_FIELD_U16 ] = "LOAD_FIELD_U16", + [ FILTER_OP_LOAD_FIELD_U32 ] = "LOAD_FIELD_U32", + [ FILTER_OP_LOAD_FIELD_U64 ] = "LOAD_FIELD_U64", + [ FILTER_OP_LOAD_FIELD_STRING ] = "LOAD_FIELD_STRING", + [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = "LOAD_FIELD_SEQUENCE", + [ FILTER_OP_LOAD_FIELD_DOUBLE ] = "LOAD_FIELD_DOUBLE", + + [ FILTER_OP_UNARY_BIT_NOT ] = "UNARY_BIT_NOT", + + [ FILTER_OP_RETURN_S64 ] = "RETURN_S64", }; const char *lttng_filter_print_op(enum filter_op op) @@ -149,12 +171,12 @@ int apply_field_reloc(struct lttng_event *event, struct bytecode_runtime *runtime, uint32_t runtime_len, uint32_t reloc_offset, - const char *field_name) + const char *field_name, + enum filter_op filter_op) { const struct lttng_event_desc *desc; const struct lttng_event_field *fields, *field = NULL; unsigned int nr_fields, i; - struct field_ref *field_ref; struct load_op *op; uint32_t field_offset = 0; @@ -169,6 +191,8 @@ int apply_field_reloc(struct lttng_event *event, return -EINVAL; nr_fields = desc->nr_fields; for (i = 0; i < nr_fields; i++) { + if (fields[i].nofilter) + continue; if (!strcmp(fields[i].name, field_name)) { field = &fields[i]; break; @@ -176,21 +200,26 @@ int apply_field_reloc(struct lttng_event *event, /* compute field offset */ switch (fields[i].type.atype) { case atype_integer: - case atype_enum: + case atype_enum_nestable: field_offset += sizeof(int64_t); break; - case atype_array: - case atype_sequence: + case atype_array_nestable: + if (!lttng_is_bytewise_integer(fields[i].type.u.array_nestable.elem_type)) + return -EINVAL; + field_offset += sizeof(unsigned long); + field_offset += sizeof(void *); + break; + case atype_sequence_nestable: + if (!lttng_is_bytewise_integer(fields[i].type.u.sequence_nestable.elem_type)) + return -EINVAL; field_offset += sizeof(unsigned long); field_offset += sizeof(void *); break; case atype_string: field_offset += sizeof(void *); break; - case atype_struct: /* Unsupported. */ - case atype_array_compound: /* Unsupported. */ - case atype_sequence_compound: /* Unsupported. */ - case atype_variant: /* Unsupported. */ + case atype_struct_nestable: /* Unsupported. */ + case atype_variant_nestable: /* Unsupported. */ default: return -EINVAL; } @@ -203,35 +232,44 @@ int apply_field_reloc(struct lttng_event *event, return -EINVAL; /* set type */ - op = (struct load_op *) &runtime->data[reloc_offset]; - field_ref = (struct field_ref *) op->data; - switch (field->type.atype) { - case atype_integer: - case atype_enum: - op->op = FILTER_OP_LOAD_FIELD_REF_S64; - break; - case atype_array: - case atype_sequence: - if (field->user) - op->op = FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE; - else - op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE; - break; - case atype_string: - if (field->user) - op->op = FILTER_OP_LOAD_FIELD_REF_USER_STRING; - else - op->op = FILTER_OP_LOAD_FIELD_REF_STRING; + op = (struct load_op *) &runtime->code[reloc_offset]; + + switch (filter_op) { + case FILTER_OP_LOAD_FIELD_REF: + { + struct field_ref *field_ref; + + field_ref = (struct field_ref *) op->data; + switch (field->type.atype) { + case atype_integer: + case atype_enum_nestable: + op->op = FILTER_OP_LOAD_FIELD_REF_S64; + break; + case atype_array_nestable: + case atype_sequence_nestable: + if (field->user) + op->op = FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE; + else + op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE; + break; + case atype_string: + if (field->user) + op->op = FILTER_OP_LOAD_FIELD_REF_USER_STRING; + else + op->op = FILTER_OP_LOAD_FIELD_REF_STRING; + break; + case atype_struct_nestable: /* Unsupported. */ + case atype_variant_nestable: /* Unsupported. */ + default: + return -EINVAL; + } + /* set offset */ + field_ref->offset = (uint16_t) field_offset; break; - case atype_struct: /* Unsupported. */ - case atype_array_compound: /* Unsupported. */ - case atype_sequence_compound: /* Unsupported. */ - case atype_variant: /* Unsupported. */ + } default: return -EINVAL; } - /* set offset */ - field_ref->offset = (uint16_t) field_offset; return 0; } @@ -240,9 +278,9 @@ int apply_context_reloc(struct lttng_event *event, struct bytecode_runtime *runtime, uint32_t runtime_len, uint32_t reloc_offset, - const char *context_name) + const char *context_name, + enum filter_op filter_op) { - struct field_ref *field_ref; struct load_op *op; struct lttng_ctx_field *ctx_field; int idx; @@ -260,29 +298,48 @@ int apply_context_reloc(struct lttng_event *event, /* Get context return type */ ctx_field = <tng_static_ctx->fields[idx]; - op = (struct load_op *) &runtime->data[reloc_offset]; - field_ref = (struct field_ref *) op->data; - switch (ctx_field->event_field.type.atype) { - case atype_integer: - case atype_enum: - op->op = FILTER_OP_GET_CONTEXT_REF_S64; - break; - /* Sequence and array supported as string */ - case atype_string: - case atype_array: - case atype_sequence: - BUG_ON(ctx_field->event_field.user); - op->op = FILTER_OP_GET_CONTEXT_REF_STRING; + op = (struct load_op *) &runtime->code[reloc_offset]; + + switch (filter_op) { + case FILTER_OP_GET_CONTEXT_REF: + { + struct field_ref *field_ref; + + field_ref = (struct field_ref *) op->data; + switch (ctx_field->event_field.type.atype) { + case atype_integer: + case atype_enum_nestable: + op->op = FILTER_OP_GET_CONTEXT_REF_S64; + break; + /* Sequence and array supported as string */ + case atype_string: + BUG_ON(ctx_field->event_field.user); + op->op = FILTER_OP_GET_CONTEXT_REF_STRING; + break; + case atype_array_nestable: + if (!lttng_is_bytewise_integer(ctx_field->event_field.type.u.array_nestable.elem_type)) + return -EINVAL; + BUG_ON(ctx_field->event_field.user); + op->op = FILTER_OP_GET_CONTEXT_REF_STRING; + break; + case atype_sequence_nestable: + if (!lttng_is_bytewise_integer(ctx_field->event_field.type.u.sequence_nestable.elem_type)) + return -EINVAL; + BUG_ON(ctx_field->event_field.user); + op->op = FILTER_OP_GET_CONTEXT_REF_STRING; + break; + case atype_struct_nestable: /* Unsupported. */ + case atype_variant_nestable: /* Unsupported. */ + default: + return -EINVAL; + } + /* set offset to context index within channel contexts */ + field_ref->offset = (uint16_t) idx; break; - case atype_struct: /* Unsupported. */ - case atype_array_compound: /* Unsupported. */ - case atype_sequence_compound: /* Unsupported. */ - case atype_variant: /* Unsupported. */ + } default: return -EINVAL; } - /* set offset to context index within channel contexts */ - field_ref->offset = (uint16_t) idx; return 0; } @@ -301,14 +358,21 @@ int apply_reloc(struct lttng_event *event, if (runtime_len - reloc_offset < sizeof(uint16_t)) return -EINVAL; - op = (struct load_op *) &runtime->data[reloc_offset]; + op = (struct load_op *) &runtime->code[reloc_offset]; switch (op->op) { case FILTER_OP_LOAD_FIELD_REF: return apply_field_reloc(event, runtime, runtime_len, - reloc_offset, name); + reloc_offset, name, op->op); case FILTER_OP_GET_CONTEXT_REF: return apply_context_reloc(event, runtime, runtime_len, - reloc_offset, name); + reloc_offset, name, op->op); + case FILTER_OP_GET_SYMBOL: + case FILTER_OP_GET_SYMBOL_FIELD: + /* + * Will be handled by load specialize phase or + * dynamically by interpreter. + */ + return 0; default: printk(KERN_WARNING "Unknown reloc op type %u\n", op->op); return -EINVAL; @@ -359,9 +423,10 @@ int _lttng_filter_event_link_bytecode(struct lttng_event *event, goto alloc_error; } runtime->p.bc = filter_bytecode; + runtime->p.event = event; runtime->len = filter_bytecode->bc.reloc_offset; /* copy original bytecode */ - memcpy(runtime->data, filter_bytecode->bc.data, runtime->len); + memcpy(runtime->code, filter_bytecode->bc.data, runtime->len); /* * apply relocs. Those are a uint16_t (offset in bytecode) * followed by a string (field name). @@ -386,7 +451,7 @@ int _lttng_filter_event_link_bytecode(struct lttng_event *event, goto link_error; } /* Specialize bytecode */ - ret = lttng_filter_specialize_bytecode(runtime); + ret = lttng_filter_specialize_bytecode(event, runtime); if (ret) { goto link_error; } @@ -445,11 +510,12 @@ void lttng_enabler_event_link_bytecode(struct lttng_event *event, /* * Insert at specified priority (seqnum) in increasing - * order. + * order. If there already is a bytecode of the same priority, + * insert the new bytecode right after it. */ list_for_each_entry_reverse(runtime, &event->bytecode_runtime_head, node) { - if (runtime->bc->bc.seqnum < bc->bc.seqnum) { + if (runtime->bc->bc.seqnum <= bc->bc.seqnum) { /* insert here */ insert_loc = &runtime->node; goto add_within; @@ -493,6 +559,7 @@ void lttng_free_event_filter_runtime(struct lttng_event *event) list_for_each_entry_safe(runtime, tmp, &event->bytecode_runtime_head, p.node) { + kfree(runtime->data); kfree(runtime); } }