1325470 - Allocator mismatch: libstdc++ operator new freed by mozalloc operator delete

Status: NEW

(Core :: Memory Allocator, defect, P3)

Description

[Julian Seward [:jseward]]

This was observed whilst chasing allocator mismatches in the unrelated bug 1320905.

There appear to be allocations made by

  std::__cxx11::basic_string<..>::_M_construct
  --> operator new(unsigned long) [in libstdc++]

freed by

  deallocate [in libstdc++]
  --> operator delete [in mozalloc.h]

Test case is dom/promise/tests/test_webassembly_compile.html.

STR:
DISPLAY=:1.0 ./mach mochitest --keep-open=no -f plain \
  --valgrind=/home/sewardj/VgTRUNK/progress/Inst/bin/valgrind \
  --valgrind-args=--num-transtab-sectors=24,--px-default=allregs-at-mem-access,--px-file-backed=unwindregs-at-mem-access,--fair-sched=yes,--fullpath-after=/MOZ/,--trace-children=yes,--show-mismatched-frees=yes \
   dom/promise/tests/test_webassembly_compile.html 2>&1 | tee spew-20-02-mc

for a build using gcc-6.3.0 with "-Og -g".

Comment 1

[Julian Seward [:jseward]]

Attachment: Valgrind complaint