derek.holloway
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58 lines
1.8 KiB
LLVM
58 lines
1.8 KiB
LLVM
; REQUIRES: x86
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; This test intentionally checks for fatal errors, and fatal errors aren't supported for testing when main is run twice.
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; XFAIL: main-run-twice
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;; The LLVM bitcode format allows for an optional wrapper header. This test
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;; shows that LLD can handle bitcode wrapped in this way, and also that an
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;; invalid offset in the wrapper header is handled cleanly.
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; RUN: rm -rf %t
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; RUN: split-file %s %t
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; RUN: llvm-as %t/ir.ll -o %t.bc
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;; Basic case:
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; RUN: %python %t/wrap_bitcode.py %t.bc %t.o 0 0x14
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; RUN: ld.lld %t.o -o %t.elf
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; RUN: llvm-readelf -s %t.elf | FileCheck %s
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;; Padding between wrapper header and body:
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; RUN: %python %t/wrap_bitcode.py %t.bc %t.o 0x10 0x24
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; RUN: ld.lld %t.o -o %t.elf
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; RUN: llvm-readelf -s %t.elf | FileCheck %s
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; CHECK: _start
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;; Invalid offset past end of file:
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; RUN: %python %t/wrap_bitcode.py %t.bc %t2.o 0x10 0xffffffff
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; RUN: not ld.lld %t2.o -o %t2.elf 2>&1 | FileCheck %s --check-prefix=ERR1 -DFILE=%t2.o
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; ERR1: error: [[FILE]]: Invalid bitcode wrapper header
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;; Invalid offset within file:
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; RUN: %python %t/wrap_bitcode.py %t.bc %t3.o 0x10 0x14
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; RUN: not ld.lld %t3.o -o %t3.elf 2>&1 | FileCheck %s --check-prefix=ERR2 -DFILE=%t3.o
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; ERR2: error: [[FILE]]: file doesn't start with bitcode header
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;--- ir.ll
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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@_start = global i32 0
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;--- wrap_bitcode.py
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## Arguments are: input file, output file, padding size, offset value.
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import struct
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import sys
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with open(sys.argv[1], 'rb') as input:
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bitcode = input.read()
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padding = int(sys.argv[3], 16) * b'\0'
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offset = int(sys.argv[4], 16)
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header = struct.pack('<IIIII', 0x0B17C0DE, 0, offset, len(bitcode), 0)
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with open(sys.argv[2], 'wb') as output:
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output.write(header)
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output.write(padding)
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output.write(bitcode)
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