Instead, pass the environment to execvpe, so the kernel can apply it directly to the new process. This avoids a use-after-free in the case where exec'ing the new process fails for any reason, as well as a race condition if there are other threads alive during the exec.
Regression tests for issue #54477.
At some point someone may want to revisit PR #53564
it would be really good to have regression tests for #54477 before that happens. :)
save-analysis: bug fix and optimisation.
The first commit fixes a bug in name resolution and save-analysis (introduced in #54145) and removes an unused parameter. This fixes the RLS tests, which are currently blocking distribution of the RLS. The second commit removes macro uses from save-analysis data, since these are never used, they just take up space.
r? @petrochenkov
Since the enums get optimized down to 1 byte long, the bits
set in the usize member don't align with the enums on big-endian
machines. Avoid this issue by shrinking the integer member to the
same size as the enums.
`create_matches` creates a `Vec<Rc<Vec<NamedMatch>>>`. Even though all the
inner `Vec`s are empty, each one is created separately.
This commit changes `create_matches` so it instead creates one empty inner
`Vec`, and shares it.
The commit also changes `MatcherPos::matches` to a boxed slice, because its
length doesn't change.
thread::unpark: Avoid notifying with mutex locked.
This means when the other thread wakes it can continue right away
instead of having to wait for the mutex.
Also add some comments explaining why the mutex needs to be locked in
the first place.
This is a follow up to https://github.com/rust-lang/rust/pull/54174
I did some tests with relacy [here](https://gist.github.com/parched/b7fb88c97755a81e5cb9f9048a15f7fb) (This PR is InnerV2). If anyone can think of some other test case worth adding let me know.
r? @RalfJung
ci: Move global credentials to web configuration
This commit moves a number of our encrypted credentials stored in
configuration files in this repository to env vars on the web UI. This
will hopefully make it easier to rotate credentials in the future as
well as quickly change them if the need arises. (quicker than landing a
PR that is).
This also updates the travis deployment process to always use the `aws`
command line tool which we're already installing on Linux and should
enable us to avoid all `dpl` gem issues as well as have greater control
over what's going where.
Fix DWARF generation for enums
The DWARF generated for Rust enums was always somewhat unusual.
Rather than using DWARF constructs directly, it would emit magic field
names like "RUST$ENCODED$ENUM$0$Name" and "RUST$ENUM$DISR". Since
PR #45225, though, even this has not worked -- the ad hoc scheme was
not updated to handle the wider variety of niche-filling layout
optimizations now available.
This patch changes the generated DWARF to use the standard tags meant
for this purpose; namely, DW_TAG_variant and DW_TAG_variant_part.
The patch to implement this went in to LLVM 7. In order to work with
older versions of LLVM, and because LLVM doesn't do anything here for
PDB, the existing code is kept as a fallback mode.
Support for this DWARF is in the Rust lldb and in gdb 8.2.
Closes#32920Closes#32924Closes#52762Closes#53153
This means when the other thread wakes it can continue right away
instead of having to wait for the mutex.
Also add some comments explaining why the mutex needs to be locked in
the first place.
Update compiler-builtins submodule
This commit updates our `compiler-builtins` submodule which brings in at
least a few improvements for intrinsics on wasm32
The enum debuginfo patch includes a legacy mode that is used when
building against LLVM 5 and LLVM 6. The main enum debuginfo tests
have been updated to rely on the new approach and a new-enough gdb.
This patch makes a copy of these tests so that the fallback mode will
continue to be tested.
Note that nil-enum.rs is not copied; it seemed not to provide enough
value to bother.
A new header directive is added, "ignore-llvm-version". I will send a
patch to update the rustc documentation once this lands.
Bug #52452 notes some debuginfo test regressions when moving to gdb
8.1. This series will also cause versions of gdb before 8.2 to fail
when a recent LLVM is used -- DW_TAG_variant_part support was not
added until 8.2.
This patch updates one of the builders to a later version of Ubuntu,
which comes with gdb 8.2. It updates the relevant tests to require
both a new-enough LLVM and a new-enough gdb; the subsequent patch
arranges to continue testing the fallback mode.
The "gdbg" results are removed from these tests because the tests now
require a rust-enabled gdb.
If you read closely, you'll see that some of the lldb results in this
patch still look a bit strange. This will be addressed in a
subsequent patch; I believe the fix is to disable the Python
pretty-printers when lldb is rust-enabled.
The DWARF generated for Rust enums was always somewhat unusual.
Rather than using DWARF constructs directly, it would emit magic field
names like "RUST$ENCODED$ENUM$0$Name" and "RUST$ENUM$DISR". Since
PR #45225, though, even this has not worked -- the ad hoc scheme was
not updated to handle the wider variety of niche-filling layout
optimizations now available.
This patch changes the generated DWARF to use the standard tags meant
for this purpose; namely, DW_TAG_variant and DW_TAG_variant_part.
The patch to implement this went in to LLVM 7. In order to work with
older versions of LLVM, and because LLVM doesn't do anything here for
PDB, the existing code is kept as a fallback mode.
Support for this DWARF is in the Rust lldb and in gdb 8.2.
Closes#32920Closes#32924Closes#52762Closes#53153
