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TheRock/compiler/amd-llvm/llvm/test/tools/dsymutil/AArch64/stmt-seq-macho.test
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## Test that verifies DW_AT_LLVM_stmt_sequence attributes are correctly
## patched in the dSYM. Each input object (a.o and b.o) carries one
## compile unit whose line table has two sequences (one per function).
## After linking, dsymutil merges each CU's two function sequences into a
## single output sequence (adjacent addresses). We verify that every
## DW_AT_LLVM_stmt_sequence attribute in the output points at a real
## DW_LNE_set_address opcode in the emitted .debug_line, for both the
## classic and parallel linker backends.
# RUN: rm -rf %t && split-file %s %t && cd %t
# RUN: yaml2obj %t/stmt_seq_macho.exe.yaml -o %t/stmt_seq_macho.exe
# RUN: yaml2obj %t/a.o.yaml -o %t/a.o
# RUN: yaml2obj %t/b.o.yaml -o %t/b.o
# RUN: dsymutil --linker classic --flat --verify-dwarf=none -oso-prepend-path %t %t/stmt_seq_macho.exe -o %t/stmt_seq_macho.dSYM
# RUN: llvm-dwarfdump --debug-info --debug-line -v %t/stmt_seq_macho.dSYM > %t/stmt_seq_macho.dSYM.txt
## Verify that all stmt_sequence offsets point to DW_LNE_set_address opcodes
## Extract unique stmt_sequence offsets and verify each appears as a set_address offset
# RUN: cat %t/stmt_seq_macho.dSYM.txt | grep "DW_AT_LLVM_stmt_sequence" | \
# RUN: sed 's/.*(\(0x[0-9a-f]*\)).*/\1/' | sort -u > %t/stmt_offsets.txt
# RUN: cat %t/stmt_seq_macho.dSYM.txt | grep "DW_LNE_set_address" | \
# RUN: sed 's/^\(0x[0-9a-f]*\):.*/\1/' | sort -u > %t/setaddr_offsets.txt
# RUN: comm -23 %t/stmt_offsets.txt %t/setaddr_offsets.txt > %t/bad_offsets.txt
# RUN: test ! -s %t/bad_offsets.txt
## Ensure no sentinel/invalid offsets (0xffffffff indicates broken patching)
# RUN: cat %t/stmt_seq_macho.dSYM.txt | FileCheck %s -check-prefix=CHECK_NO_INVALID_OFFSET
# CHECK_NO_INVALID_OFFSET-NOT: DW_AT_LLVM_stmt_sequence{{.*}}0xfffffff
# RUN: dsymutil --linker parallel --flat --verify-dwarf=none -oso-prepend-path %t %t/stmt_seq_macho.exe -o %t/stmt_seq_macho.dSYM
# RUN: llvm-dwarfdump --debug-info --debug-line -v %t/stmt_seq_macho.dSYM > %t/stmt_seq_macho.dSYM.txt
# RUN: cat %t/stmt_seq_macho.dSYM.txt | grep "DW_AT_LLVM_stmt_sequence" | \
# RUN: sed 's/.*(\(0x[0-9a-f]*\)).*/\1/' | sort -u > %t/stmt_offsets.txt
# RUN: cat %t/stmt_seq_macho.dSYM.txt | grep "DW_LNE_set_address" | \
# RUN: sed 's/^\(0x[0-9a-f]*\):.*/\1/' | sort -u > %t/setaddr_offsets.txt
# RUN: comm -23 %t/stmt_offsets.txt %t/setaddr_offsets.txt > %t/bad_offsets.txt
# RUN: test ! -s %t/bad_offsets.txt
# RUN: cat %t/stmt_seq_macho.dSYM.txt | FileCheck %s -check-prefix=CHECK_NO_INVALID_OFFSET
#--- stmt_seq_macho.cpp
// This file is split into a.cpp and b.cpp by the gen script.
// The functions are compiled into separate object files and linked
// with b.o first, so function_b gets a lower address than function_a.
// This triggers reordering in dsymutil's line table processing.
#--- a.cpp
// Functions in a.o - will have HIGHER addresses in the final executable
#define ATTRIB extern "C" __attribute__((noinline))
ATTRIB int function_a1(int a) {
int b = a + 1;
return b * 2;
}
ATTRIB int function_a2(int a) {
int b = a + 3;
return b + 1;
}
#--- b.cpp
// Functions in b.o - will have LOWER addresses in the final executable
#define ATTRIB extern "C" __attribute__((noinline))
ATTRIB int function_b1(int a) {
int b = a - 1;
return b * 3;
}
ATTRIB int function_b2(int a) {
int b = a - 5;
return b + 2;
}
#--- main.cpp
extern "C" int function_a1(int);
extern "C" int function_a2(int);
extern "C" int function_b1(int);
extern "C" int function_b2(int);
int main() {
int sum = 0;
sum += function_a1(1);
sum += function_a2(2);
sum += function_b1(3);
sum += function_b2(4);
return sum;
}
#--- gen
# Compile to separate object files with stmt_sequence attributes
clang --target=arm64-apple-macos11 \
-c \
-fdebug-compilation-dir=/private/tmp/stmt_seq \
-g \
-gdwarf-4 \
-fno-unwind-tables \
-mllvm -emit-func-debug-line-table-offsets \
-fno-exceptions \
-mno-outline \
-Oz \
a.cpp \
-o a.o
clang --target=arm64-apple-macos11 \
-c \
-fdebug-compilation-dir=/private/tmp/stmt_seq \
-g \
-gdwarf-4 \
-fno-unwind-tables \
-mllvm -emit-func-debug-line-table-offsets \
-fno-exceptions \
-mno-outline \
-Oz \
b.cpp \
-o b.o
clang --target=arm64-apple-macos11 \
-c \
-fdebug-compilation-dir=/private/tmp/stmt_seq \
-g \
-gdwarf-4 \
-fno-unwind-tables \
-fno-exceptions \
-mno-outline \
-Oz \
main.cpp \
-o main.o
# Link with b.o FIRST so b's functions get LOWER addresses than a's functions.
# This means when dsymutil processes a.o, its line table sequences will need
# to be placed AFTER b.o's sequences in the output, triggering reordering.
ld64.lld \
-arch arm64 \
-platform_version macos 11.0.0 11.0.0 \
-o stmt_seq_macho.exe \
b.o a.o main.o \
-oso_prefix $(pwd)/
# Convert to YAML for the test
echo "#--- a.o.yaml"
obj2yaml a.o | sed '1a\
IsLittleEndian: true'
echo ""
echo "#--- b.o.yaml"
obj2yaml b.o | sed '1a\
IsLittleEndian: true'
echo ""
echo "#--- stmt_seq_macho.exe.yaml"
obj2yaml stmt_seq_macho.exe | sed '1a\
IsLittleEndian: true'
#--- stmt-seq-macho.yaml
#--- a.o.yaml
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