| commit | ee3dded36d69264998c39af0ec851371850d842b | [log] [tgz] |
|---|---|---|
| author | Jeremy Faller <jeremy@golang.org> | Wed Jul 31 10:33:11 2019 -0400 |
| committer | Jeremy Faller <jeremy@golang.org> | Tue Sep 24 22:14:05 2019 +0000 |
| tree | 3b0cc64dab2b404aec26341233bfa71d6c0121eb | |
| parent | 78a37347143bd03026a6c6860a550b1638ce5314 [diff] |
cmd/compile: generate debug_lines in compiler This is mostly a copy-paste jobs from the linker to generate the debug information in the compiler instead of the linker. The new data is inserted into the debug line numbers symbol defined in CL 188238. Generating the debug information BEFORE deadcode results in one subtle difference, and that is that the state machine needs to be reset at the end of every function's debug line table. The reasoning is that generating the table AFTER dead code allows the producer and consumer of the table to agree on the state of the state machine, and since these blocks will (eventually) be concatenated in the linker, we don't KNOW the state of the state machine unless we reset it. So, generateDebugLinesSymbol resets the state machine at the end of every function. Right now, we don't do anything with this line information, or the file table -- we just populate the symbols. Change-Id: If9103eda6cc5f1f7a11e7e1a97184a060a4ad7fb Reviewed-on: https://go-review.googlesource.com/c/go/+/188317 Run-TryBot: Jeremy Faller <jeremy@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Austin Clements <austin@google.com>
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