X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fbytecode%2Fbytecode.c;h=aadfc17a173ccf528182a023532b701f8c73e716;hp=b8edd6913e18fa9fe1b4f7dbb753380c05a59e89;hb=1cbd136b2479ef142bfb339b13d3d25aa772dda5;hpb=0ae3cfc61fedae38ef31fe5a99458c4f2161c3b5

diff --git a/src/common/bytecode/bytecode.c b/src/common/bytecode/bytecode.c
index b8edd6913..aadfc17a1 100644
--- a/src/common/bytecode/bytecode.c
+++ b/src/common/bytecode/bytecode.c
@@ -13,7 +13,8 @@
 
 #define INIT_ALLOC_SIZE 4
 
-static inline int get_count_order(unsigned int count)
+static inline
+int get_count_order(unsigned int count)
 {
 	int order;
 
@@ -23,12 +24,11 @@ static inline int get_count_order(unsigned int count)
 	return order;
 }
 
-LTTNG_HIDDEN
-int bytecode_init(struct lttng_filter_bytecode_alloc **fb)
+int bytecode_init(struct lttng_bytecode_alloc **fb)
 {
 	uint32_t alloc_len;
 
-	alloc_len = sizeof(struct lttng_filter_bytecode_alloc) + INIT_ALLOC_SIZE;
+	alloc_len = sizeof(struct lttng_bytecode_alloc) + INIT_ALLOC_SIZE;
 	*fb = calloc(alloc_len, 1);
 	if (!*fb) {
 		return -ENOMEM;
@@ -38,20 +38,20 @@ int bytecode_init(struct lttng_filter_bytecode_alloc **fb)
 	}
 }
 
-LTTNG_HIDDEN
-int32_t bytecode_reserve(struct lttng_filter_bytecode_alloc **fb, uint32_t align, uint32_t len)
+static
+int32_t bytecode_reserve(struct lttng_bytecode_alloc **fb, uint32_t align, uint32_t len)
 {
 	int32_t ret;
-	uint32_t padding = offset_align((*fb)->b.len, align);
+	uint32_t padding = lttng_offset_align((*fb)->b.len, align);
 	uint32_t new_len = (*fb)->b.len + padding + len;
-	uint32_t new_alloc_len = sizeof(struct lttng_filter_bytecode_alloc) + new_len;
+	uint32_t new_alloc_len = sizeof(struct lttng_bytecode_alloc) + new_len;
 	uint32_t old_alloc_len = (*fb)->alloc_len;
 
 	if (new_len > LTTNG_FILTER_MAX_LEN)
 		return -EINVAL;
 
 	if (new_alloc_len > old_alloc_len) {
-		struct lttng_filter_bytecode_alloc *newptr;
+		struct lttng_bytecode_alloc *newptr;
 
 		new_alloc_len =
 			max_t(uint32_t, 1U << get_count_order(new_alloc_len), old_alloc_len << 1);
@@ -69,8 +69,7 @@ int32_t bytecode_reserve(struct lttng_filter_bytecode_alloc **fb, uint32_t align
 	return ret;
 }
 
-LTTNG_HIDDEN
-int bytecode_push(struct lttng_filter_bytecode_alloc **fb, const void *data,
+int bytecode_push(struct lttng_bytecode_alloc **fb, const void *data,
 		uint32_t align, uint32_t len)
 {
 	int32_t offset;
@@ -82,8 +81,7 @@ int bytecode_push(struct lttng_filter_bytecode_alloc **fb, const void *data,
 	return 0;
 }
 
-LTTNG_HIDDEN
-int bytecode_push_logical(struct lttng_filter_bytecode_alloc **fb,
+int bytecode_push_logical(struct lttng_bytecode_alloc **fb,
 		struct logical_op *data,
 		uint32_t align, uint32_t len,
 		uint16_t *skip_offset)
@@ -99,3 +97,168 @@ int bytecode_push_logical(struct lttng_filter_bytecode_alloc **fb,
 			- (void *) &(*fb)->b.data[0];
 	return 0;
 }
+
+int bytecode_push_get_payload_root(struct lttng_bytecode_alloc **bytecode)
+{
+	int ret;
+	struct load_op *insn;
+	const uint32_t insn_len = sizeof(struct load_op);
+
+	insn = calloc(insn_len, 1);
+	if (!insn) {
+		ret = -ENOMEM;
+		goto end;
+	}
+
+	insn->op = BYTECODE_OP_GET_PAYLOAD_ROOT;
+	ret = bytecode_push(bytecode, insn, 1, insn_len);
+	free(insn);
+end:
+	return ret;
+}
+
+int bytecode_push_get_context_root(struct lttng_bytecode_alloc **bytecode)
+{
+	int ret;
+	struct load_op *insn;
+	const uint32_t insn_len = sizeof(struct load_op);
+
+	insn = calloc(insn_len, 1);
+	if (!insn) {
+		ret = -ENOMEM;
+		goto end;
+	}
+
+	insn->op = BYTECODE_OP_GET_CONTEXT_ROOT;
+	ret = bytecode_push(bytecode, insn, 1, insn_len);
+	free(insn);
+end:
+	return ret;
+}
+
+int bytecode_push_get_app_context_root(struct lttng_bytecode_alloc **bytecode)
+{
+	int ret;
+	struct load_op *insn;
+	const uint32_t insn_len = sizeof(struct load_op);
+
+	insn = calloc(insn_len, 1);
+	if (!insn) {
+		ret = -ENOMEM;
+		goto end;
+	}
+
+	insn->op = BYTECODE_OP_GET_APP_CONTEXT_ROOT;
+	ret = bytecode_push(bytecode, insn, 1, insn_len);
+	free(insn);
+end:
+	return ret;
+}
+
+int bytecode_push_get_index_u64(struct lttng_bytecode_alloc **bytecode,
+		uint64_t index)
+{
+	int ret;
+	struct load_op *insn;
+	struct get_index_u64 index_op_data;
+	const uint32_t insn_len =
+			sizeof(struct load_op) + sizeof(struct get_index_u64);
+
+	insn = calloc(insn_len, 1);
+	if (!insn) {
+		ret = -ENOMEM;
+		goto end;
+	}
+
+	insn->op = BYTECODE_OP_GET_INDEX_U64;
+	index_op_data.index = index;
+	memcpy(insn->data, &index_op_data, sizeof(index));
+	ret = bytecode_push(bytecode, insn, 1, insn_len);
+
+	free(insn);
+end:
+	return ret;
+}
+
+int bytecode_push_get_symbol(struct lttng_bytecode_alloc **bytecode,
+		struct lttng_bytecode_alloc **bytecode_reloc,
+		const char *symbol)
+{
+	int ret;
+	struct load_op *insn;
+	struct get_symbol symbol_offset;
+	uint32_t reloc_offset_u32;
+	uint16_t reloc_offset;
+	uint32_t bytecode_reloc_offset_u32;
+	const uint32_t insn_len =
+			sizeof(struct load_op) + sizeof(struct get_symbol);
+
+	insn = calloc(insn_len, 1);
+	if (!insn) {
+		ret = -ENOMEM;
+		goto end;
+	}
+
+	insn->op = BYTECODE_OP_GET_SYMBOL;
+
+	/*
+	 * Get offset in the reloc portion at which the symbol name
+	 * will end up at (GET_SYMBOL's operand points there).
+	 */
+	bytecode_reloc_offset_u32 = bytecode_get_len(&(*bytecode_reloc)->b) +
+			sizeof(reloc_offset);
+	symbol_offset.offset = (uint16_t) bytecode_reloc_offset_u32;
+	memcpy(insn->data, &symbol_offset, sizeof(symbol_offset));
+
+	/*
+	 * Get offset in the bytecode where the opcode will end up at,
+	 * the reloc offset points to it.
+	 */
+	reloc_offset_u32 = bytecode_get_len(&(*bytecode)->b);
+	if (reloc_offset_u32 > LTTNG_FILTER_MAX_LEN - 1) {
+		ret = -EINVAL;
+		goto end;
+	}
+	reloc_offset = (uint16_t) reloc_offset_u32;
+
+	/* Append op in bytecode. */
+	ret = bytecode_push(bytecode, insn, 1, insn_len);
+	if (ret) {
+		goto end;
+	}
+
+	/* Append reloc offset. */
+	ret = bytecode_push(bytecode_reloc, &reloc_offset,
+			1, sizeof(reloc_offset));
+	if (ret) {
+		goto end;
+	}
+
+	/* Append symbol name. */
+	ret = bytecode_push(bytecode_reloc, symbol, 1, strlen(symbol) + 1);
+
+end:
+	free(insn);
+	return ret;
+}
+
+/*
+ * Allocate an lttng_bytecode object and copy the given original bytecode.
+ *
+ * Return allocated bytecode or NULL on error.
+ */
+struct lttng_bytecode *lttng_bytecode_copy(
+		const struct lttng_bytecode *orig_f)
+{
+	struct lttng_bytecode *bytecode = NULL;
+
+	bytecode = zmalloc(sizeof(*bytecode) + orig_f->len);
+	if (!bytecode) {
+		goto error;
+	}
+
+	memcpy(bytecode, orig_f, sizeof(*bytecode) + orig_f->len);
+
+error:
+	return bytecode;
+}