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[compiler-rt][TySan] Add Hexagon target support (#191603)

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Add shadow memory mapping for Hexagon (32-bit architecture) and enable
the TySan build for the Hexagon target.

Hexagon uses a 4-byte shadow entry (PtrShift=2) with the shadow region
at 0x80000000-0xBFFFFFFF (1GB). A 28-bit mask (kAppMemMsk) covers 256MB
of app address space; addresses differing only in bits 28-31 alias in
the shadow. kAppAddr is set to 0xC0000000 to size the mmap to exactly
the 1GB shadow region.
This commit is contained in:
Brian Cain
2026-04-24 09:59:04 -05:00
committed by GitHub
parent b093148328
commit 87a9cbaed1
2 changed files with 15 additions and 1 deletions
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2
compiler-rt/cmake/Modules/AllSupportedArchDefs.cmake
View File

@@ -102,7 +102,7 @@ else()
set(ALL_TSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64} ${PPC64} ${S390X} set(ALL_TSAN_SUPPORTED_ARCH ${X86_64} ${MIPS64} ${ARM64} ${PPC64} ${S390X}
${LOONGARCH64} ${RISCV64}) ${LOONGARCH64} ${RISCV64})
endif() endif()
set(ALL_TYSAN_SUPPORTED_ARCH ${X86_64} ${ARM64} ${S390X}) set(ALL_TYSAN_SUPPORTED_ARCH ${X86_64} ${ARM64} ${S390X} ${HEXAGON})
set(ALL_UBSAN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${RISCV64} set(ALL_UBSAN_SUPPORTED_ARCH ${X86} ${X86_64} ${ARM32} ${ARM64} ${RISCV64}
${MIPS32} ${MIPS64} ${PPC64} ${S390X} ${SPARC} ${SPARCV9} ${HEXAGON} ${MIPS32} ${MIPS64} ${PPC64} ${S390X} ${SPARC} ${SPARCV9} ${HEXAGON}
${LOONGARCH64} ${AMDGPU} ${NVPTX}) ${LOONGARCH64} ${AMDGPU} ${NVPTX})

14
compiler-rt/lib/tysan/tysan_platform.h
View File

@@ -52,6 +52,20 @@ struct Mapping {
static const uptr kAppMemMsk = ~0xC00000000000ULL; static const uptr kAppMemMsk = ~0xC00000000000ULL;
static const uptr kPtrShift = 3; static const uptr kPtrShift = 3;
}; };
#elif defined(__hexagon__)
// Hexagon is a 32-bit architecture. Each shadow entry is a 4-byte pointer
// (PtrShift=2). The shadow occupies 4x the masked app memory range.
// With a 28-bit mask (256MB of app addresses), the shadow is 1GB at
// 0x80000000-0xBFFFFFFF. App addresses that differ only in bits 28-31
// will alias in the shadow; in practice this means code/heap (low addresses)
// and stack (~0x40000000) may share shadow entries, which can cause
// false positives in rare cases.
struct Mapping {
static const uptr kShadowAddr = 0x80000000u;
static const uptr kAppAddr = 0xC0000000u;
static const uptr kAppMemMsk = ~0xF0000000u;
static const uptr kPtrShift = 2;
};
#else #else
#error "TySan not supported for this platform!" #error "TySan not supported for this platform!"
#endif #endif