mirror of
https://github.com/libretro/parallel-dc.git
synced 2026-11-07 12:37:53 -10:00
libretroadmin
f62d495d2d
A CHD was read through one decoded hunk and a thread that decoded one hunk ahead. A game that plays CD audio while it streams data reads the two from different places a sector at a time, so each threw out the other's hunk and aimed the thread away from it, and the hunks were decoded on the emulation thread: a stutter a GDI never shows. Each stream (data tracks, audio tracks) now reads through its own libretro-common vfs_prefetch, whose thread decodes the hunks ahead on an image handle of its own, one window per hunk; sectors are lent from the windows in place, and a read command's Prefetch() sets the data stream's thread going before the first sector is asked for. The core defines HAVE_THREADS where it builds threads, so the prefetcher is not compiled to stubs. tools/chd/chd_streams_test, run from tools/chd/run.sh and now in CI, reads audio and data at once and fails when the reading thread does the decoding.
46 lines
2.3 KiB
Bash
46 lines
2.3 KiB
Bash
#!/bin/sh
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# Link-closure check for the statically linked core.
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#
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# sh tools/static-link-check.sh <retroarch-tree>
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#
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# A static build (STATIC_LINKING=1, as libnx) leaves the libretro-common
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# units to the frontend. This builds the core that way in a worktree,
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# lists every symbol its archive still needs, and checks that each one is
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# defined either in the archive itself or in <retroarch-tree>'s built
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# objects. A unit the core needs and compiles only in its shared build is
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# reported by name.
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#
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# Needs a RetroArch tree that has been built (its obj-*/ directory is
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# what is searched). Fails rather than skips when there is none.
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set -e
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ROOT=$(cd "$(dirname "$0")/.." && pwd)
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RA=${1:?retroarch tree}
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RA_OBJ=$(ls -d "$RA"/obj-* 2>/dev/null | head -n 1)
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[ -n "$RA_OBJ" ] || { echo "$RA has no built objects" >&2; exit 1; }
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WORK=${TMPDIR:-/tmp}/static_link_check.$$
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trap 'cd "$ROOT"; git worktree remove --force "$WORK" 2>/dev/null; rm -rf "$WORK"' EXIT
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git -C "$ROOT" worktree add -q "$WORK" HEAD
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git -C "$ROOT" diff | (cd "$WORK" && git apply --allow-empty) 2>/dev/null || true
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make -C "$WORK" -j"${JOBS:-2}" STATIC_LINKING=1 >"$WORK/build.log" 2>&1 \
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|| { tail -n 30 "$WORK/build.log"; echo "FAIL: static build"; exit 1; }
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A=$(ls "$WORK"/*.a)
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nm -g --defined-only "$A" 2>/dev/null | awk '$2 ~ /[TDBRW]/ {print $3}' | sort -u > "$WORK/have"
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find "$RA_OBJ" -name '*.o' -exec nm -g --defined-only {} + 2>/dev/null \
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| awk '$2 ~ /[TDBRW]/ {print $3}' | sort -u >> "$WORK/have"
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sort -u -o "$WORK/have" "$WORK/have"
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# Only the symbols the core's own headers name: libc, GL and the C++
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# runtime come from the toolchain.
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nm -u "$A" 2>/dev/null | awk '{print $2}' | sort -u \
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| grep -E '^(core_|archive_|chd_image_|rchd_|r7z_|rzip_|rinflate_|rzstd_|rflac_|filestream_|retro_vfs_|path_|fill_pathname|string_|strlcpy|strlcat|encoding_|cpu_features_|retro_opendir|retro_readdir|retro_closedir|retro_dirent|sthread_|slock_|scond_|retro_eventcount|retro_spsc|vfs_prefetch_|memalign_|rtime_|utf8|utf16)' \
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> "$WORK/need" || true
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MISSING=$(comm -23 "$WORK/need" "$WORK/have")
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if [ -n "$MISSING" ]; then
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echo "FAIL: the static core needs symbols nothing provides:"
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echo "$MISSING" | sed 's/^/ /'
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exit 1
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fi
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echo "static-link-check: PASS ($(wc -l < "$WORK/need" | tr -d ' ') symbols resolved)"
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