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changes to Frames to support access to captured-by-copy-semantics variables

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This commit is contained in:
Vern Paxson 2021-01-04 14:17:56 -08:00
parent 627fb8616e
commit 8f4b616d65
2 changed files with 51 additions and 9 deletions
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25
src/Frame.h
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@ -286,9 +286,12 @@ private:
*/
void ClearElement(int n);
/** Have we captured this id? */
/** Have we captured this id? Version for deprecated semantics. */
bool IsOuterID(const ID* in) const;
/** Have we captured this id? Version for current semantics. */
bool IsCaptureID(const ID* in) const;
/** Serializes an offset_map */
static broker::expected<broker::data>
SerializeOffsetMap(const OffsetMap& in);
@ -316,10 +319,12 @@ private:
/** Associates ID's offsets with values. */
std::unique_ptr<Element[]> frame;
/** The enclosing frame of this frame. */
/** The enclosing frame of this frame. Used for reference semantics. */
Frame* closure;
/** ID's used in this frame from the enclosing frame. */
/** ID's used in this frame from the enclosing frame, when using
* reference semantics (closure != nullptr).
*/
IDPList outer_ids;
/**
@ -328,8 +333,22 @@ private:
*/
std::unique_ptr<OffsetMap> offset_map;
/** Frame used for captures (if any) with copy semantics. */
Frame* captures;
/** Maps IDs to offsets into the "captures" frame. If the ID
* isn't present, then it's not a capture.
*
* We keep this separate from offset_map to help ensure we don't
* confuse code from the deprecated semantics with the current
* semantics.
*/
const OffsetMap* captures_offset_map;
/** The function this frame is associated with. */
const ScriptFunc* function;
// The following is only needed for the debugger.
/** The arguments to the function that this Frame is associated with. */
const zeek::Args* func_args;