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I'm in the process of rebasing this over #1986: And this commit was already implemented:
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Set up the chdir and environment variable in posix_spawn. Fixes DaemonEngine#1336.
When box64 is used for the NaCl loader, environment variables are allowed to pass through. Make it clearer that this is the bool argument being passed and avoid unnecessary ifdef.
Remove cvars controlling whether the Linux bootstrap loader is used. Never use bootstrap with the amd64 loader. Always use bootstrap with 32-bit loaders. Remove amd64 bootstrap usage from deps. Closes DaemonEngine#1327.
When creating a NaCl (or native exe) VM on Windows, block evironment variables from being passed through to the subprocess as is done on *nix. Probably we do this since there are NACL* variables that can disable secure sandboxing. inheritEnvironment is always false on Windows, but I implemented the true case anyway since it's less code than having the Q_UNUSED and asserting it's false.
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Fixed merge conflict and compiler warning. |
Check the Linux sysctl vm.mmap_min_addr only when using the NaCl bootstrap (rather than always when using NaCl). Or equivalently, check it only with 32-bit NaCl runtimes. The bootstrap fails to start when the value is too high to due low fixed address mappings. On ARM at least, sel_ldr proper would also fail with a too-high min address since that disturbs the address space layout. On 64-bit there is neither the bootstrap nor 0-based address space layout so it always works.
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By the way yesterday I rebased both this and #1998 over: Because it's the least effort to do it this way than the other way, a lot of things in #1998 and #2001 were based on things that were already reworked in #1986. It also means that some intermediary work from #1986 is made useless (like the bootstrap being reworked, just for being completely removed later), but doing the rebase that way really was the least effort. |
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Stacked on #1998. Additional changes to NaCl process creation:
nacl_helper_bootstrapwith the 64-bit loader. This lets us remove a nice chunk of cruft.