0005efd455
In debug info, we expect variables to have location info if they are used and we don't want location info for functions that are not used. However, if an unused function is inlined, we could have the scenario where a function is not in the final binary but its static variable is in the final binary. Ensure that variables in the final binary have location debug info even if their scope was inlined. Also add `--implicit-check-not` to a test for clarity. Reviewed By: JDevlieghere Differential Revision: https://reviews.llvm.org/D115565
56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
// RUN: dsymutil -f -y %p/dummy-debug-map.map -oso-prepend-path %p/../Inputs/dead-stripped -o - | llvm-dwarfdump - --debug-info | FileCheck %s --implicit-check-not "{{DW_AT_low_pc|DW_AT_high_pc|DW_AT_location|DW_TAG|NULL}}"
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// The test was compiled with:
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// clang++ -O2 -g -c dead-strip.cpp -o 1.o
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// The goal of the test is to exercise dsymutil's behavior in presence of
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// functions/variables that have been dead-stripped by the linker but
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// that are still present in the linked debug info (in this case because
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// they have been DW_TAG_import'd in another namespace).
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// Everything in the N namespace below doesn't have a debug map entry, and
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// thus is considered dead (::foo() has a debug map entry, otherwise dsymutil
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// would just drop the CU altogether).
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// CHECK: DW_TAG_compile_unit
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// CHECK: DW_AT_low_pc
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// CHECK: DW_AT_high_pc
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// CHECK: DW_TAG_namespace
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namespace N {
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int blah = 42;
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// This is actually a dsymutil-classic bug that we reproduced
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// CHECK: DW_TAG_variable
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// CHECK: DW_AT_location
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__attribute__((always_inline)) int foo() { return blah; }
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// CHECK: DW_TAG_subprogram
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// CHECK: DW_AT_frame_base
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// CHECK: DW_TAG_subprogram
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int bar(unsigned i) {
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int val = foo();
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if (i)
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return val + bar(i-1);
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return foo();
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}
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// CHECK: DW_TAG_subprogram
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// CHECK: DW_AT_frame_base
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// CHECK: DW_TAG_formal_parameter
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// CHECK: DW_TAG_variable
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// CHECK: DW_TAG_inlined_subroutine
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// CHECK: NULL
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// CHECK: NULL
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}
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// CHECK: DW_TAG_base_type
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// CHECK: DW_TAG_imported_module
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// CHECK: DW_TAG_subprogram
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// CHECK: DW_AT_low_pc
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// CHECK: DW_AT_high_pc
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// CHECK: DW_TAG_base_type
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// CHECK: NULL
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using namespace N;
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void foo() {}
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