Clean-up: bytecode: hide file-local bytecode_reserve util

[lttng-tools.git] / src / common / bytecode / bytecode.c

diff --git a/src/common/bytecode/bytecode.c b/src/common/bytecode/bytecode.c
index e85dd66c14eb90a6584c882d9401bd70ccba0822..6a5b171e149ed38692f675c53fd45982f1189bab 100644 (file)
--- a/src/common/bytecode/bytecode.c
+++ b/src/common/bytecode/bytecode.c
@@ -24,11 +24,11 @@ static inline int get_count_order(unsigned int count)
 }
 
 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 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);
@@ -70,7 +70,7 @@ int32_t bytecode_reserve(struct lttng_filter_bytecode_alloc **fb, uint32_t align
 }
 
 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;
@@ -83,7 +83,7 @@ int bytecode_push(struct lttng_filter_bytecode_alloc **fb, const void *data,
 }
 
 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)
@@ -100,16 +100,165 @@ int bytecode_push_logical(struct lttng_filter_bytecode_alloc **fb,
        return 0;
 }
 
+LTTNG_HIDDEN
+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;
+}
+
+LTTNG_HIDDEN
+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;
+}
+
+LTTNG_HIDDEN
+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;
+}
+
+LTTNG_HIDDEN
+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;
+}
+
+LTTNG_HIDDEN
+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.
  */
 LTTNG_HIDDEN
-struct lttng_filter_bytecode *lttng_filter_bytecode_copy(
-               const struct lttng_filter_bytecode *orig_f)
+struct lttng_bytecode *lttng_bytecode_copy(
+               const struct lttng_bytecode *orig_f)
 {
-       struct lttng_filter_bytecode *bytecode = NULL;
+       struct lttng_bytecode *bytecode = NULL;
 
        bytecode = zmalloc(sizeof(*bytecode) + orig_f->len);
        if (!bytecode) {