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For a long time, with JIT enabled builds I am facing with asserts when running either jsc or QtLauncher inside valgrind.
Test cases are simple:
$ valgrind WebKitBuild/Debug/bin/QtLauncher #and browsing a little
Both of them asserts here:
ASSERTION FAILED: !callLinkInfo->isLinked()
As I remember, in the early days of the JIT there were no such problems.
Of course, we can not be sure that the bug is not in valgrind.
Personally I think that it would be useful to clarify the problem.
same here. I've created a very minimal test case: http://chani.ca/webkit/valgrind/
all I have to do is make two should* calls and I get the assert failure.
I have found a solution: use "--smc-check=all".
This is needed because the JIT::linkCall function (and some other JIT staff) modifying the jitted code, so valgrind must check self modification.
Alternatively we could use valgrind's client request mechanism. That would be cheaper, but I am dubious about how the apple folks would feel about to introduce valgrind into the codebase (we should have at least a build option, and a define for valgrind).
I think we can leave with the --smc-check=all option, so I set this as wontfix.
*** Bug 34484 has been marked as a duplicate of this bug. ***