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LAST BUILD BRANCH: skaplun/lj-1057-arm64-stp-fusing-across-tbar
DEFAULT BRANCH: tarantool/master
Repo Added 27 Jul 2023 09:52AM CUT
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LAST BUILD ON BRANCH skaplun/fix-stack-alloc-on-trace
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16 Oct 2024 01:53PM CUT coverage: 92.903% (+0.06%) from 92.845%
11367162229

push

github

Buristan
Fix stack allocation after on-trace stack check.

(cherry picked from commit 204cee2c9)

It is possible that a snapshot topslot is less than the possible topslot
of the Lua stack. In that case, if the Lua stack overflows in
`lj_vmevent_prepare()`, the error is raised inside
`lj_vm_exit_handler()`, which has no corresponding DWARF eh_frame [1],
so it leads to the crash.

This patch fix-ups the topslot of the snapshot on trace exit to the
maximum possible one.

Sergey Kaplun:
* added the description and the test for the problem

[1]: https://refspecs.linuxfoundation.org/LSB_3.0.0/LSB-Core-generic/LSB-Core-generic/ehframechpt.html

Part of tarantool/tarantool#10199

5688 of 6029 branches covered (94.34%)

Branch coverage included in aggregate %.

3 of 3 new or added lines in 1 file covered. (100.0%)

4 existing lines in 1 file now uncovered.

21685 of 23435 relevant lines covered (92.53%)

2956158.41 hits per line

Relevant lines Covered
Build:
Build:
23435 RELEVANT LINES 21685 COVERED LINES
2956158.41 HITS PER LINE
Source Files on skaplun/fix-stack-alloc-on-trace
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  • List 89
  • Changed 87
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  • Coverage Changed 6
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Coverage∆FileLinesRelevantCoveredMissedHits/LineBranch HitsBranch Misses
13.79
src/lj_utils_leb128.c132 51 7 44 1337056.0 - 188841 6
65.41
src/lj_clib.c432 102 69 33 3769.0 + 1918 13
76.62
src/lj_wbuf.c141 66 48 18 477485.0 - 674711 0
77.8
src/lj_api.c1369 860 665 195 918708.0 + 289183 47
78.02
src/lj_opt_fold.c2542 977 747 + 1230 - 1780805.0 + 6397247 50
78.75
src/lib_math.c224 72 56 16 20823.0 + 77 1
84.03
src/lj_ccall.c1183 172 145 27 30938.0 + 22055 11
84.21
src/lj_load.c164 81 69 12 30875.0 + 2311 3
86.84
src/lj_vmevent.c57 31 27 4 18799.0 + 106 1
87.21
src/lib_jit.c771 323 283 40 426.0 + 358 10
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Builds Branch Commit Type Ran Committer Via Coverage
11367162229 skaplun/fix-stack-alloc-on-trace Fix stack allocation after on-trace stack check. (cherry picked from commit 204cee2c9) It is possible that a snapshot topslot is less than the possible topslot of the Lua stack. In that case, if the Lua stack overf... push 16 Oct 2024 02:07PM CUT Buristan github
92.9
10792163058 skaplun/fix-stack-alloc-on-trace Fix stack allocation after on-trace stack check. (cherry picked from commit 204cee2c9) It is possible that a snapshot topslot is less than the possible topslot of the Lua stack. In that case, if the Lua stack overf... push 10 Sep 2024 12:15PM CUT Buristan github
92.84
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