mirror of
https://github.com/odin-lang/Odin.git
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1e2d91c38b
i386: treat a bit_field as the aggregate it is in C, fixing a segfault on return, abi test: document the i386 microarch baseline; do not read a signal exit as a type index
148 lines
6.2 KiB
Bash
Executable File
148 lines
6.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -eu
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# LOCAL ONLY: not wired into CI.
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#
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# This covers what is not in CI: the targets with no CI job and no cross libc,
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# i386 and arm32, for checking manually.
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#
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# `abi_main.odin` is the corpus without core:testing, exiting with the number of
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# failing types, so this needs no threads, no libc and no cross sysroot, only
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# clang (which targets everything) and qemu-user.
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#
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# ./cross.sh linux_arm64 aarch64-linux-gnu qemu-aarch64
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# ./cross.sh linux_i386 i386-linux-gnu qemu-i386 -microarch:pentium4
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# ./cross.sh linux_arm32 arm-linux-gnueabihf qemu-arm
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# ./cross.sh linux_riscv64 riscv64-linux-gnu qemu-riscv64
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#
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# i386 needs a microarch: below SSE2 the x86 backend cannot legalise a
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# sub-16-byte `f16` vector, and merely declaring a `proc "c"` that takes a
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# `#simd[2]f16` aborts the compiler with "LLVM ERROR: Do not know how to split
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# the result of this operator!".
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#
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# `pentium4` is what clang's own default for `i386-linux-gnu` is, `haswell`
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# additionally has F16C, which isolates one non-ABI failure: `hfa4_f16`
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# diverges at pentium4 and agrees at haswell. It is `_Float16` conversion
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# codegen rather than a calling convention
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TARGET=${1:?odin target, e.g. linux_arm64}
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TRIPLE=${2:?clang triple, e.g. aarch64-linux-gnu}
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QEMU=${3:?qemu binary, e.g. qemu-aarch64}
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shift 3 # anything else goes to `odin build`
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: "${ODIN:=../../odin}"
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: "${CLANG:=clang}"
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# The C side's optimisation level. An ABI is a link-time contract, so the two
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# sides are built independently and either may be optimised: `ABI_CFLAGS=-O2`.
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: "${ABI_CFLAGS:=}"
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case "$TARGET" in
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*i386*) START='.text
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.globl _start
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_start:
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call probe_main
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movl %eax, %ebx
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movl $1, %eax
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int $0x80' ;;
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*arm64*) START='.text
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.globl _start
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_start:
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bl probe_main
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mov x8, #93
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svc #0' ;;
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*arm32*) START='.text
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.globl _start
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_start:
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bl probe_main
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mov r7, #1
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svc #0' ;;
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*riscv64*) START='.text
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.globl _start
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_start:
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call probe_main
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mv a0, a0
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li a7, 93
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ecall' ;;
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*) echo "no start stub for $TARGET" >&2; exit 2 ;;
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esac
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# cleaned BEFORE, not after -- the driver is left in place to inspect
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rm -rf build-cross
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mkdir -p build-cross/p
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$ODIN run gen.odin -file -- build-cross
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# Ask the C compiler which tiers it has, by preprocessing the generated `build-cross/tiers.c`.
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# The Odin side must use the same tiers or it references symbols C never emitted.
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have() { $CLANG --target="$TRIPLE" -E build-cross/tiers.c 2>/dev/null | grep -q "ABI_YES_$1" && echo true || echo false; }
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TIERS="-define:ABI_TIER_GNU=$(have GNU) -define:ABI_TIER_F16=$(have F16) -define:ABI_TIER_I128=$(have I128)"
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mv build-cross/abi_main.odin build-cross/p/
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printf '%s\n' "$START" > build-cross/start.s
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# A freestanding shim: the runtime reaches for a few libc symbols even with
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# -no-crt, and 64-bit division on a 32-bit target is a compiler-rt call.
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cat > build-cross/shim.c <<'EOF'
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typedef unsigned long usz;
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static char heap[1<<20];
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static usz hoff;
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void *malloc(usz n){ usz a=(hoff+15)&~(usz)15; if(a+n>sizeof heap) return 0; hoff=a+n; return heap+a; }
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void free(void *p){ (void)p; }
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void *calloc(usz n, usz m){ char*p=malloc(n*m); if(p) for(usz i=0;i<n*m;i++)p[i]=0; return p; }
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void *realloc(void *p, usz n){ char*q=malloc(n); if(q&&p) for(usz i=0;i<n;i++)q[i]=((char*)p)[i]; return q; }
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void *memcpy(void *d, const void *s, usz n){ char*a=d; const char*b=s; for(usz i=0;i<n;i++)a[i]=b[i]; return d; }
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void *memmove(void *d, const void *s, usz n){ char*a=d; const char*b=s;
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if(a<b){for(usz i=0;i<n;i++)a[i]=b[i];} else {for(usz i=n;i>0;i--)a[i-1]=b[i-1];} return d; }
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void *memset(void *d, int c, usz n){ char*a=d; for(usz i=0;i<n;i++)a[i]=(char)c; return d; }
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int memcmp(const void *x, const void *y, usz n){ const unsigned char*a=x,*b=y;
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for(usz i=0;i<n;i++) if(a[i]!=b[i]) return a[i]<b[i]?-1:1; return 0; }
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void abort(void){ __builtin_trap(); }
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unsigned long __stack_chk_guard = 0x2b2b2b2b;
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void __stack_chk_fail(void){ __builtin_trap(); }
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typedef unsigned long long u64; typedef long long i64;
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static u64 udivmod(u64 a, u64 b, u64 *rem){ u64 q=0,r=0;
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if(b==0){ if(rem)*rem=0; return 0; }
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for(int i=63;i>=0;i--){ r=(r<<1)|((a>>i)&1); if(r>=b){ r-=b; q|=(u64)1<<i; } }
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if(rem)*rem=r; return q; }
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u64 __udivdi3(u64 a, u64 b){ return udivmod(a,b,0); }
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u64 __umoddi3(u64 a, u64 b){ u64 r; udivmod(a,b,&r); return r; }
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i64 __divdi3(i64 a, i64 b){ int n=0; u64 ua=a<0?(n^=1,(u64)-a):(u64)a, ub=b<0?(n^=1,(u64)-b):(u64)b;
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u64 q=udivmod(ua,ub,0); return n?-(i64)q:(i64)q; }
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i64 __moddi3(i64 a, i64 b){ int n=a<0; u64 ua=a<0?(u64)-a:(u64)a, ub=b<0?(u64)-b:(u64)b;
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u64 r; udivmod(ua,ub,&r); return n?-(i64)r:(i64)r; }
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EOF
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set -x
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$ODIN build build-cross/p -target:"$TARGET" -build-mode:obj -no-entry-point \
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-no-thread-local -reloc-mode:static $TIERS -out:build-cross/o "$@"
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$CLANG --target="$TRIPLE" $ABI_CFLAGS -c build-cross/abi_corpus.c -o build-cross/abi_corpus_c.o -w -fno-stack-protector
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$CLANG --target="$TRIPLE" -c build-cross/start.s -o build-cross/start.o
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$CLANG --target="$TRIPLE" -ffreestanding -fno-builtin -O1 -w -c build-cross/shim.c -o build-cross/shim.o
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$CLANG --target="$TRIPLE" -nostdlib -static -fuse-ld=lld \
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build-cross/*.o -o build-cross/bin
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set +x
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set +e
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"$QEMU" build-cross/bin
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rc=$?
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set -e
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# A driver that DIES reports 128+signal, and that collides with the type indices: 139 is both
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# SIGSEGV and a perfectly good index, so reading it as an index names an innocent type. There is no
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# cheap way to tell them apart here. ABI_SKIP is a compile-time `-define`
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if [ "$rc" -gt 128 ] && [ "$rc" -lt 165 ]; then
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echo "$TARGET: exit $rc is AMBIGUOUS." >&2
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echo " Either type index $rc, or the driver died of signal $((rc-128)) (11 = SIGSEGV)." >&2
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echo " Re-run with -define:ABI_SKIP=$((rc+1)): if the result moves it was the type," >&2
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echo " and if it does not, a wrong-ABI call is corrupting the process." >&2
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fi
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if [ "$rc" -eq 0 ]; then
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echo "$TARGET: every type agrees with clang"
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else
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# the driver returns the INDEX of the first disagreement, and the generator
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# emits the index -> name map, so the failure names a type rather than a count
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name=$(grep -m1 "^// $rc " build-cross/p/abi_main.odin | cut -f2)
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echo "$TARGET: DISAGREES with clang, first at type '${name:-#$rc}'" >&2
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echo " re-run with -define:ABI_SKIP=$rc to find the next one" >&2
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fi
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exit $rc
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