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11bb1678e2
Since the integer wrapping sanitizer's behavior depends on its associated .scl file, we must force a full rebuild if the file changes. If not, instrumentation may differ between targets based on when they were built. Generate a new header file, integer-wrap.h, any time the Clang .scl file changes. Include the header file in compiler-version.h when its associated feature name, INTEGER_WRAP, is defined. This will be picked up by fixdep and force rebuilds where needed. Acked-by: Justin Stitt <justinstitt@google.com> Link: https://lore.kernel.org/r/20250503184623.2572355-3-kees@kernel.org Reviewed-by: Nicolas Schier <n.schier@avm.de> Signed-off-by: Kees Cook <kees@kernel.org>
45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifdef __LINUX_COMPILER_VERSION_H
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#error "Please do not include <linux/compiler-version.h>. This is done by the build system."
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#endif
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#define __LINUX_COMPILER_VERSION_H
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/*
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* This header exists to force full rebuild when the compiler is upgraded.
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*
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* When fixdep scans this, it will find this string "CONFIG_CC_VERSION_TEXT"
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* and add dependency on include/config/CC_VERSION_TEXT, which is touched
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* by Kconfig when the version string from the compiler changes.
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*/
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/* Additional tree-wide dependencies start here. */
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/*
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* If any of the GCC plugins change, we need to rebuild everything that
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* was built with them, as they may have changed their behavior and those
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* behaviors may need to be synchronized across all translation units.
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*/
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#ifdef GCC_PLUGINS
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#include <generated/gcc-plugins.h>
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#endif
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/*
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* If the randstruct seed itself changes (whether for GCC plugins or
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* Clang), the entire tree needs to be rebuilt since the randomization of
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* structures may change between compilation units if not.
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*/
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#ifdef RANDSTRUCT
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#include <generated/randstruct_hash.h>
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#endif
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/*
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* If any external changes affect Clang's integer wrapping sanitizer
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* behavior, a full rebuild is needed as the coverage for wrapping types
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* may have changed, which may impact the expected behaviors that should
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* not differ between compilation units.
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*/
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#ifdef INTEGER_WRAP
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#include <generated/integer-wrap.h>
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#endif
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