rust/tests/run-make/coverage-llvmir
Zalathar 6af9fef085 coverage: Emit the filenames section before encoding per-function mappings
Most coverage metadata is encoded into two sections in the final executable.
The `__llvm_covmap` section mostly just contains a list of filenames, while the
`__llvm_covfun` section contains encoded coverage maps for each instrumented
function.

The catch is that each per-function record also needs to contain a hash of the
filenames list that it refers to. Historically this was handled by assembling
most of the per-function data into a temporary list, then assembling the
filenames buffer, then using the filenames hash to emit the per-function data,
and then finally emitting the filenames table itself.

However, now that we build the filenames table up-front (via a separate
traversal of the per-function data), we can hash and emit that part first, and
then emit each of the per-function records immediately after building. This
removes the awkwardness of having to temporarily store nearly-complete
per-function records.
2023-10-22 23:17:15 +11:00
..
Makefile Remove the old `coverage-reports` and `coverage` directories 2023-06-28 11:09:19 +10:00
filecheck.testprog.txt coverage: Emit the filenames section before encoding per-function mappings 2023-10-22 23:17:15 +11:00
testprog.rs Move /src/test to /tests 2023-01-11 09:32:08 +00:00