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Optionally enable LLVM profile continuous mode #15166

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5 changes: 5 additions & 0 deletions tools/test/collect_coverage.sh
Original file line number Diff line number Diff line change
Expand Up @@ -93,6 +93,11 @@ if [[ -z "$GCOV_PREFIX_STRIP" ]]; then
fi
export GCOV_PREFIX="${COVERAGE_DIR}"
export LLVM_PROFILE_FILE="${COVERAGE_DIR}/%h-%p-%m.profraw"
if [[ -n "$LLVM_PROFILE_CONTINUOUS_MODE" ]]; then
# %c enables continuous mode but expands out to nothing, so the position
# within LLVM_PROFILE_FILE does not matter.
export LLVM_PROFILE_FILE="${LLVM_PROFILE_FILE}%c"
fi

# In coverage mode for Java, we need to merge the runtime classpath before
# running the tests. JacocoCoverageRunner uses this merged jar in order
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