Building the ASAN for the n32 MIPS ABI currently fails, due to a few reasons: - defined(__mips64), which is set solely based on the architecture type (32-bit/64-bit), was still used in some places. Therefore, defined(__mips64) is swapped with SANITIZER_MIPS64, which takes the ABI into account as well - defined(__mips64) && _MIPS_SIM == ABI64. - The n32 ABI still uses 64-bit *Linux* system calls, even though the word size is 32 bits. - After the transition to canonical system calls (https://reviews.llvm.org/D124212), the n32 ABI still didn't use them, even though they are supported, as per https://github.com/torvalds/linux/blob/master/arch/mips/kernel/syscalls/syscall_n32.tbl. - struct_kernel_stat_sz was not updated after being changed in LLVM's source tree.
See https://reviews.llvm.org/D127098. libsanitizer/ChangeLog: * sanitizer_common/sanitizer_linux.cpp (defined): Resolve ASAN build issues for the n32 ABI. * sanitizer_common/sanitizer_platform.h (defined): Likewise. * sanitizer_common/sanitizer_platform_limits_posix.h: Likewise. --- libsanitizer/sanitizer_common/sanitizer_linux.cpp | 17 ++++++++++------- libsanitizer/sanitizer_common/sanitizer_platform.h | 2 +- libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h | 2 +- 3 files changed, 12 insertions(+), 9 deletions(-) diff --git a/libsanitizer/sanitizer_common/sanitizer_linux.cpp b/libsanitizer/sanitizer_common/sanitizer_linux.cpp index e2c32d679ad..5ba033492e7 100644 --- a/libsanitizer/sanitizer_common/sanitizer_linux.cpp +++ b/libsanitizer/sanitizer_common/sanitizer_linux.cpp @@ -34,7 +34,7 @@ // format. Struct kernel_stat is defined as 'struct stat' in asm/stat.h. To // access stat from asm/stat.h, without conflicting with definition in // sys/stat.h, we use this trick. -#if defined(__mips64) +#if SANITIZER_MIPS64 #include <asm/unistd.h> #include <sys/types.h> #define stat kernel_stat @@ -124,8 +124,9 @@ const int FUTEX_WAKE_PRIVATE = FUTEX_WAKE | FUTEX_PRIVATE_FLAG; // Are we using 32-bit or 64-bit Linux syscalls? // x32 (which defines __x86_64__) has SANITIZER_WORDSIZE == 32 // but it still needs to use 64-bit syscalls. -#if SANITIZER_LINUX && (defined(__x86_64__) || defined(__powerpc64__) || \ - SANITIZER_WORDSIZE == 64) +#if SANITIZER_LINUX && (defined(__x86_64__) || defined(__powerpc64__) || \ + SANITIZER_WORDSIZE == 64 || \ + (defined(__mips__) && _MIPS_SIM == _ABIN32)) # define SANITIZER_LINUX_USES_64BIT_SYSCALLS 1 #else # define SANITIZER_LINUX_USES_64BIT_SYSCALLS 0 @@ -289,7 +290,7 @@ static void stat64_to_stat(struct stat64 *in, struct stat *out) { } #endif -#if defined(__mips64) +#if SANITIZER_MIPS64 // Undefine compatibility macros from <sys/stat.h> // so that they would not clash with the kernel_stat // st_[a|m|c]time fields @@ -343,7 +344,8 @@ uptr internal_stat(const char *path, void *buf) { #if SANITIZER_FREEBSD return internal_syscall(SYSCALL(fstatat), AT_FDCWD, (uptr)path, (uptr)buf, 0); # elif SANITIZER_LINUX -# if SANITIZER_WORDSIZE == 64 || SANITIZER_X32 +# if SANITIZER_WORDSIZE == 64 || SANITIZER_X32 || \ + (defined(__mips__) && _MIPS_SIM == _ABIN32) return internal_syscall(SYSCALL(newfstatat), AT_FDCWD, (uptr)path, (uptr)buf, 0); # else @@ -366,7 +368,8 @@ uptr internal_lstat(const char *path, void *buf) { return internal_syscall(SYSCALL(fstatat), AT_FDCWD, (uptr)path, (uptr)buf, AT_SYMLINK_NOFOLLOW); # elif SANITIZER_LINUX -# if defined(_LP64) || SANITIZER_X32 +# if defined(_LP64) || SANITIZER_X32 || \ + (defined(__mips__) && _MIPS_SIM == _ABIN32) return internal_syscall(SYSCALL(newfstatat), AT_FDCWD, (uptr)path, (uptr)buf, AT_SYMLINK_NOFOLLOW); # else @@ -1053,7 +1056,7 @@ uptr GetMaxVirtualAddress() { return (1ULL << (MostSignificantSetBitIndex(GET_CURRENT_FRAME()) + 1)) - 1; #elif SANITIZER_RISCV64 return (1ULL << 38) - 1; -# elif defined(__mips64) +# elif SANITIZER_MIPS64 return (1ULL << 40) - 1; // 0x000000ffffffffffUL; # elif defined(__s390x__) return (1ULL << 53) - 1; // 0x001fffffffffffffUL; diff --git a/libsanitizer/sanitizer_common/sanitizer_platform.h b/libsanitizer/sanitizer_common/sanitizer_platform.h index 8fe0d831431..8bd9a327623 100644 --- a/libsanitizer/sanitizer_common/sanitizer_platform.h +++ b/libsanitizer/sanitizer_common/sanitizer_platform.h @@ -159,7 +159,7 @@ #if defined(__mips__) # define SANITIZER_MIPS 1 -# if defined(__mips64) +# if defined(__mips64) && _MIPS_SIM == _ABI64 # define SANITIZER_MIPS32 0 # define SANITIZER_MIPS64 1 # else diff --git a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h index 89772a7e5c0..62a99035db3 100644 --- a/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h +++ b/libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.h @@ -83,7 +83,7 @@ const unsigned struct_kernel_stat64_sz = 104; #elif defined(__mips__) const unsigned struct_kernel_stat_sz = SANITIZER_ANDROID ? FIRST_32_SECOND_64(104, 128) - : FIRST_32_SECOND_64(144, 216); + : FIRST_32_SECOND_64(160, 216); const unsigned struct_kernel_stat64_sz = 104; #elif defined(__s390__) && !defined(__s390x__) const unsigned struct_kernel_stat_sz = 64; ---
