913cd11f94
We want to support CFI instrumentation for the bitcode section, without miscompiling the object code portion of a FatLTO object. We can reuse the existing mechanisms in the LowerTypeTestsPass to do that, by just adding the pass to the FatLTO pipeline after the EmbedBitcodePass with the correct options set. Fixes #112053
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
// REQUIRES: x86-registered-target
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// RUN: %clang_cc1 -triple x86_64-unknown-fuchsia -O2 -flto -ffat-lto-objects \
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// RUN: -fsanitize=cfi-icall -fsanitize-trap=cfi-icall -fvisibility=hidden -emit-llvm -o - %s \
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// RUN: | FileCheck %s
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// CHECK: llvm.embedded.object
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// CHECK-SAME: section ".llvm.lto"
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// CHECK-LABEL: define hidden void @foo
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// CHECK: entry:
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// CHECK-NEXT: %cmp14.not = icmp eq i64 %len, 0
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// CHECK-NEXT: br i1 %cmp14.not, label %for.end7, label %for.cond1.preheader.preheader
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// CHECK: for.cond1.preheader.preheader: ; preds = %entry
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// CHECK-NEXT: %arrayidx.1 = getelementptr inbounds nuw i8, ptr %ptr, i64 4
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// CHECK-NEXT: br label %for.cond1.preheader
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// CHECK-NOT: @llvm.type.test
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// The code below is a reduced case from https://github.com/llvm/llvm-project/issues/112053
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#define __PRINTFLIKE(__fmt, __varargs) __attribute__((__format__(__printf__, __fmt, __varargs)))
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typedef void func(void* arg, const char* fmt, ...) __PRINTFLIKE(2, 3);
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typedef __SIZE_TYPE__ size_t;
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typedef unsigned long uintptr_t;
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extern "C"
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void foo(const void* ptr, size_t len, long disp_addr,
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func* printf_func, void* printf_arg) {
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uintptr_t address = (uintptr_t)ptr;
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size_t count;
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for (count = 0; count < len; count += 16) {
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union {
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unsigned int buf[4];
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unsigned char cbuf[16];
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} u;
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size_t s = 10;
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size_t i;
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for (i = 0; i < s / 4; i++) {
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u.buf[i] = ((const unsigned int*)address)[i];
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printf_func(printf_arg, "%08x ", static_cast<unsigned int>(u.buf[i]));
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}
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}
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}
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