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Revision tags: llvmorg-18.1.8, llvmorg-18.1.7, llvmorg-18.1.6, llvmorg-18.1.5, llvmorg-18.1.4, llvmorg-18.1.3, llvmorg-18.1.2, llvmorg-18.1.1, llvmorg-18.1.0, llvmorg-18.1.0-rc4, llvmorg-18.1.0-rc3, llvmorg-18.1.0-rc2, llvmorg-18.1.0-rc1, llvmorg-19-init, llvmorg-17.0.6, llvmorg-17.0.5, llvmorg-17.0.4, llvmorg-17.0.3, llvmorg-17.0.2, llvmorg-17.0.1, llvmorg-17.0.0, llvmorg-17.0.0-rc4, llvmorg-17.0.0-rc3, llvmorg-17.0.0-rc2, llvmorg-17.0.0-rc1, llvmorg-18-init
# e61764c3 06-Jul-2023 varconst <varconsteq@gmail.com>

[libc++][hardening][NFC] Rename the `has-debug-mode` feature to `has-legacy-debug-mode`.

This will allow reusing the `has-debug-mode` feature for the new debug
mode without accidentally reenabling o

[libc++][hardening][NFC] Rename the `has-debug-mode` feature to `has-legacy-debug-mode`.

This will allow reusing the `has-debug-mode` feature for the new debug
mode without accidentally reenabling old debug mode tests. The
`has-legacy-debug-mode` feature is deliberately never set -- the old
tests are left checked in to have a point of reference for the level of
checking that was supported by the legacy debug mode, making it easier
to verify we've reached feature parity in the future.

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Revision tags: llvmorg-16.0.6, llvmorg-16.0.5, llvmorg-16.0.4, llvmorg-16.0.3, llvmorg-16.0.2, llvmorg-16.0.1, llvmorg-16.0.0, llvmorg-16.0.0-rc4, llvmorg-16.0.0-rc3, llvmorg-16.0.0-rc2, llvmorg-16.0.0-rc1, llvmorg-17-init, llvmorg-15.0.7, llvmorg-15.0.6, llvmorg-15.0.5, llvmorg-15.0.4, llvmorg-15.0.3, working, llvmorg-15.0.2, llvmorg-15.0.1, llvmorg-15.0.0, llvmorg-15.0.0-rc3, llvmorg-15.0.0-rc2, llvmorg-15.0.0-rc1, llvmorg-16-init, llvmorg-14.0.6, llvmorg-14.0.5, llvmorg-14.0.4, llvmorg-14.0.3, llvmorg-14.0.2, llvmorg-14.0.1
# f3966eaf 01-Apr-2022 Louis Dionne <ldionne.2@gmail.com>

[libc++] Make the Debug mode a configuration-time only option

The debug mode has been broken pretty much ever since it was shipped
because it was possible to enable the debug mode in user code witho

[libc++] Make the Debug mode a configuration-time only option

The debug mode has been broken pretty much ever since it was shipped
because it was possible to enable the debug mode in user code without
actually enabling it in the dylib, leading to ODR violations that
caused various kinds of failures.

This commit makes the debug mode a knob that is configured when
building the library and which can't be changed afterwards. This is
less flexible for users, however it will actually work as intended
and it will allow us, in the future, to add various kinds of checks
that do not assume the same ABI as the normal library. Furthermore,
this will make the debug mode more robust, which means that vendors
might be more tempted to support it properly, which hasn't been the
case with the current debug mode.

This patch shouldn't break any user code, except folks who are building
against a library that doesn't have the debug mode enabled and who try
to enable the debug mode in their code. Such users will get a compile-time
error explaining that this configuration isn't supported anymore.

In the future, we should further increase the granularity of the debug
mode checks so that we can cherry-pick which checks to enable, like we
do for unspecified behavior randomization.

Differential Revision: https://reviews.llvm.org/D122941

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# f3a970a8 06-May-2022 John Brawn <john.brawn@arm.com>

[libc++] Mark tests that use check_assertion.h as requiring unix headers

On targets without unistd.h or sys/wait.h (such as bare metal targets)
any test that uses check_assertion.h will fail, so add

[libc++] Mark tests that use check_assertion.h as requiring unix headers

On targets without unistd.h or sys/wait.h (such as bare metal targets)
any test that uses check_assertion.h will fail, so add
REQUIRES: has-unix-headers to them and autodetect whether we have
these headers or not.

These tests currently have unsupported on windows, but that's exactly
because windows doesn't have these headers so we can remove the
specific check for windows.

Differential Revision: https://reviews.llvm.org/D124623

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Revision tags: llvmorg-14.0.0, llvmorg-14.0.0-rc4, llvmorg-14.0.0-rc3
# f6fd1c14 07-Mar-2022 Louis Dionne <ldionne.2@gmail.com>

[libc++] Overhaul all tests for assertions and debug mode

Prior to this patch, there was no distinction between tests that check
basic assertions and tests that check full-fledged iterator debugging

[libc++] Overhaul all tests for assertions and debug mode

Prior to this patch, there was no distinction between tests that check
basic assertions and tests that check full-fledged iterator debugging
assertions. Both were disabled when support for the debug mode is not
provided in the dylib, which is stronger than it needs to be.

Furthermore, all of the tests using "debug_macros.h" that contain more
than one assertion in them were broken -- any code after the first
assertion would never be executed.

This patch refactors all of our assertion-related tests to:
1. Be enabled whenever they can, i.e. basic assertions tests are run
even when the debug mode is disabled.
2. Use the superior `check_assertion.h` (previously `debug_mode_helper.h`)
instead of `debug_macros.h`, which allows multiple assertions in the
same program.
3. Coalesce some tests into the same file to make them more readable.
4. Use consistent naming for test files -- no more db{1,2,3,...,10} tests.

This is a large but mostly mechanical patch.

Differential Revision: https://reviews.llvm.org/D121462

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