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| author | Sverker Eriksson <[email protected]> | 2014-10-29 17:11:31 +0100 |
|---|---|---|
| committer | Sverker Eriksson <[email protected]> | 2014-10-29 17:11:31 +0100 |
| commit | 5b4cb838afbe9e700139f810a1c4c9b0e91c511c (patch) | |
| tree | 3da49e88ace06d08fedd3dca309763b67ce8874a /erts/emulator/beam/beam_ranges.c | |
| parent | 743ed31108ee555db18d9833186865e85e34333e (diff) | |
| download | otp-5b4cb838afbe9e700139f810a1c4c9b0e91c511c.tar.gz otp-5b4cb838afbe9e700139f810a1c4c9b0e91c511c.tar.bz2 otp-5b4cb838afbe9e700139f810a1c4c9b0e91c511c.zip | |
erts: Fix bug in beam_ranges
Symptom: VM on OSX (darwin11.4.2) with +Meamin running sasl tests,
crashing when init:reboot() does erlang:purge_module(installer).
Problem: Off-by-one bug in beam_ranges:find_range, returning the wrong
range if the 'end' of one module is the 'start' of the next. This is only
possible if using sys_alloc (+Meamin) as our own allocators always put
block headers between allocated payload data.
Diffstat (limited to 'erts/emulator/beam/beam_ranges.c')
| -rw-r--r-- | erts/emulator/beam/beam_ranges.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/erts/emulator/beam/beam_ranges.c b/erts/emulator/beam/beam_ranges.c index 0f2d5d0c2a..cb6470638f 100644 --- a/erts/emulator/beam/beam_ranges.c +++ b/erts/emulator/beam/beam_ranges.c @@ -282,7 +282,7 @@ find_range(BeamInstr* pc) while (low < high) { if (pc < mid->start) { high = mid; - } else if (pc > RANGE_END(mid)) { + } else if (pc >= RANGE_END(mid)) { low = mid + 1; } else { erts_smp_atomic_set_nob(&r[active].mid, (erts_aint_t) mid); |