fb24b4d46a
When --hot-functions-at-end is used in combination with --use-old-text, allocate code at the highest possible addresses withing old .text. This feature is mostly useful for HHVM, where it is beneficial to have hot static code placed as close as possible to jitted code.
25 lines
855 B
C
25 lines
855 B
C
// Check that llvm-bolt pushes code to higher addresses under
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// --hot-functions-at-end when rewriting code in-place.
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// REQUIRES: system-linux
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// RUN: %clang %cflags -O0 %s -o %t -no-pie -Wl,-q -falign-functions=64 \
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// RUN: -nostartfiles -nostdlib -ffreestanding
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// RUN: llvm-bolt %t -o %t.bolt --use-old-text --align-functions=1 \
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// RUN: --no-huge-pages --align-text=1 --use-gnu-stack --hot-functions-at-end \
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// RUN: | FileCheck %s --check-prefix=CHECK-BOLT
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// RUN: llvm-readelf --sections %t.bolt | FileCheck %s
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// CHECK-BOLT: using original .text for new code with 0x1 alignment at {{.*}}
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// As .text is pushed higher, preceding .bolt.org.text should have non-zero
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// size.
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// CHECK: .bolt.org.text PROGBITS
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// CHECK-NOT: {{ 000000 }}
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// CHECK-SAME: AX
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// CHECK-NEXT: .text PROGBITS
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int foo() { return 0; }
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int main() { return foo(); }
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