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[llvm-dwarfdump][Stats] Clean up

This addresses:
  -Clean up the source code
  -Refactor the JSON fields
  -Fix the test cases
  -Improve the docs for the stats output

Differential Revision: https://reviews.llvm.org/D77789
This commit is contained in:
Djordje Todorovic 2020-04-23 12:14:13 +02:00
parent ccb6e4cddf
commit c074cdefc8
15 changed files with 382 additions and 297 deletions

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@ -112,7 +112,8 @@ OPTIONS
.. option:: --statistics
Collect debug info quality metrics and print the results
as machine-readable single-line JSON output.
as machine-readable single-line JSON output. The output
format is described in the section below (:ref:`stats-format`).
.. option:: --summarize-types
@ -162,6 +163,30 @@ OPTIONS
Read command-line options from `<FILE>`.
.. _stats-format:
FORMAT OF STATISTICS OUTPUT
---------------------------
The ::option:`--statistics` option generates single-line JSON output
representing quality metrics of the processed debug info. These metrics are
useful to compare changes between two compilers, particularly for judging
the effect that a change to the compiler has on the debug info quality.
The output is formatted as key-value pairs. The first pair contains a version
number. The following naming scheme is used for the keys:
- `variables` ==> local variables and parameters
- `local vars` ==> local variables
- `params` ==> formal parameters
For aggregated values, the following keys are used:
- `sum_of_all_variables(...)` ==> the sum applied to all variables
- `#bytes` ==> the number of bytes
- `#variables - entry values ...` ==> the number of variables excluding
the entry values etc.
EXIT STATUS
-----------

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@ -20,7 +20,7 @@
; RUN: llvm-as < %s | llvm-dis | llvm-as | llvm-dis -o /dev/null
; VERIFY: No errors.
; STATS: "call site DIEs":6
; STATS: "#call site DIEs":6
@sink = global i32 0, align 4, !dbg !0

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@ -1,89 +1,89 @@
; RUN: llc -debug-entry-values %s -o - -filetype=obj \
; RUN: | llvm-dwarfdump -statistics - | FileCheck %s
;
; CHECK: "entry value scope bytes covered":5
; CHECK: "formal params scope bytes total":20
; CHECK: "formal params scope bytes covered":20
; CHECK: "formal params entry value scope bytes covered":5
; CHECK: "vars scope bytes total":90
; CHECK: "vars scope bytes covered":60
; CHECK: "vars entry value scope bytes covered":0
; CHECK: "total variables procesed by location statistics":6
; CHECK: "variables with 0% of its scope covered":1
; CHECK: "variables with (0%,10%) of its scope covered":0
; CHECK: "variables with [10%,20%) of its scope covered":0
; CHECK: "variables with [20%,30%) of its scope covered":0
; CHECK: "variables with [30%,40%) of its scope covered":0
; CHECK: "variables with [40%,50%) of its scope covered":0
; CHECK: "variables with [50%,60%) of its scope covered":1
; CHECK: "variables with [60%,70%) of its scope covered":0
; CHECK: "variables with [70%,80%) of its scope covered":0
; CHECK: "variables with [80%,90%) of its scope covered":1
; CHECK: "variables with [90%,100%) of its scope covered":0
; CHECK: "variables with 100% of its scope covered":3
; CHECK: "variables (excluding the debug entry values) with 0% of its scope covered":1
; CHECK: "variables (excluding the debug entry values) with (0%,10%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with [10%,20%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with [20%,30%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with [30%,40%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with [40%,50%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with [50%,60%) of its scope covered":2
; CHECK: "variables (excluding the debug entry values) with [60%,70%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with [70%,80%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with [80%,90%) of its scope covered":1
; CHECK: "variables (excluding the debug entry values) with [90%,100%) of its scope covered":0
; CHECK: "variables (excluding the debug entry values) with 100% of its scope covered":2
; CHECK: "total params procesed by location statistics":2
; CHECK: "params with 0% of its scope covered":0
; CHECK: "params with (0%,10%) of its scope covered":0
; CHECK: "params with [10%,20%) of its scope covered":0
; CHECK: "params with [20%,30%) of its scope covered":0
; CHECK: "params with [30%,40%) of its scope covered":0
; CHECK: "params with [40%,50%) of its scope covered":0
; CHECK: "params with [50%,60%) of its scope covered":0
; CHECK: "params with [60%,70%) of its scope covered":0
; CHECK: "params with [70%,80%) of its scope covered":0
; CHECK: "params with [80%,90%) of its scope covered":0
; CHECK: "params with [90%,100%) of its scope covered":0
; CHECK: "params with 100% of its scope covered":2
; CHECK: "params (excluding the debug entry values) with 0% of its scope covered":0
; CHECK: "params (excluding the debug entry values) with (0%,10%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [10%,20%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [20%,30%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [30%,40%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [40%,50%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [50%,60%) of its scope covered":1
; CHECK: "params (excluding the debug entry values) with [60%,70%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [70%,80%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [80%,90%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with [90%,100%) of its scope covered":0
; CHECK: "params (excluding the debug entry values) with 100% of its scope covered":1
; CHECK: "total vars procesed by location statistics":4
; CHECK: "vars with 0% of its scope covered":1
; CHECK: "vars with (0%,10%) of its scope covered":0
; CHECK: "vars with [10%,20%) of its scope covered":0
; CHECK: "vars with [20%,30%) of its scope covered":0
; CHECK: "vars with [30%,40%) of its scope covered":0
; CHECK: "vars with [40%,50%) of its scope covered":0
; CHECK: "vars with [50%,60%) of its scope covered":1
; CHECK: "vars with [60%,70%) of its scope covered":0
; CHECK: "vars with [70%,80%) of its scope covered":0
; CHECK: "vars with [80%,90%) of its scope covered":1
; CHECK: "vars with [90%,100%) of its scope covered":0
; CHECK: "vars with 100% of its scope covered":1
; CHECK: "vars (excluding the debug entry values) with 0% of its scope covered":1
; CHECK: "vars (excluding the debug entry values) with (0%,10%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with [10%,20%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with [20%,30%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with [30%,40%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with [40%,50%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with [50%,60%) of its scope covered":1
; CHECK: "vars (excluding the debug entry values) with [60%,70%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with [70%,80%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with [80%,90%) of its scope covered":1
; CHECK: "vars (excluding the debug entry values) with [90%,100%) of its scope covered":0
; CHECK: "vars (excluding the debug entry values) with 100% of its scope covered":1
;
; CHECK: "sum_all_variables(#bytes in parent scope covered by DW_OP_entry_value)":5
; CHECK: "sum_all_params(#bytes in parent scope)":20
; CHECK: "sum_all_params(#bytes in parent scope covered by DW_AT_location)":20
; CHECK: "sum_all_params(#bytes in parent scope covered by DW_OP_entry_value)":5
; CHECK: "sum_all_local_vars(#bytes in parent scope)":90
; CHECK: "sum_all_local_vars(#bytes in parent scope covered by DW_AT_location)":60
; CHECK: "sum_all_local_vars(#bytes in parent scope covered by DW_OP_entry_value)":0
; CHECK: "#variables processed by location statistics":6
; CHECK: "#variables with 0% of parent scope covered by DW_AT_location":1
; CHECK: "#variables with (0%,10%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with [10%,20%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with [20%,30%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with [30%,40%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with [40%,50%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with [50%,60%) of parent scope covered by DW_AT_location":1
; CHECK: "#variables with [60%,70%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with [70%,80%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with [80%,90%) of parent scope covered by DW_AT_location":1
; CHECK: "#variables with [90%,100%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables with 100% of parent scope covered by DW_AT_location":3
; CHECK: "#variables - entry values with 0% of parent scope covered by DW_AT_location":1
; CHECK: "#variables - entry values with (0%,10%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with [10%,20%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with [20%,30%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with [30%,40%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with [40%,50%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with [50%,60%) of parent scope covered by DW_AT_location":2
; CHECK: "#variables - entry values with [60%,70%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with [70%,80%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with [80%,90%) of parent scope covered by DW_AT_location":1
; CHECK: "#variables - entry values with [90%,100%) of parent scope covered by DW_AT_location":0
; CHECK: "#variables - entry values with 100% of parent scope covered by DW_AT_location":2
; CHECK: "#params processed by location statistics":2
; CHECK: "#params with 0% of parent scope covered by DW_AT_location":0
; CHECK: "#params with (0%,10%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [10%,20%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [20%,30%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [30%,40%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [40%,50%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [50%,60%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [60%,70%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [70%,80%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [80%,90%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with [90%,100%) of parent scope covered by DW_AT_location":0
; CHECK: "#params with 100% of parent scope covered by DW_AT_location":2
; CHECK: "#params - entry values with 0% of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with (0%,10%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [10%,20%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [20%,30%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [30%,40%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [40%,50%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [50%,60%) of parent scope covered by DW_AT_location":1
; CHECK: "#params - entry values with [60%,70%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [70%,80%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [80%,90%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with [90%,100%) of parent scope covered by DW_AT_location":0
; CHECK: "#params - entry values with 100% of parent scope covered by DW_AT_location":1
; CHECK: "#local vars processed by location statistics":4
; CHECK: "#local vars with 0% of parent scope covered by DW_AT_location":1
; CHECK: "#local vars with (0%,10%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with [10%,20%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with [20%,30%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with [30%,40%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with [40%,50%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with [50%,60%) of parent scope covered by DW_AT_location":1
; CHECK: "#local vars with [60%,70%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with [70%,80%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with [80%,90%) of parent scope covered by DW_AT_location":1
; CHECK: "#local vars with [90%,100%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars with 100% of parent scope covered by DW_AT_location":1
; CHECK: "#local vars - entry values with 0% of parent scope covered by DW_AT_location":1
; CHECK: "#local vars - entry values with (0%,10%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with [10%,20%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with [20%,30%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with [30%,40%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with [40%,50%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with [50%,60%) of parent scope covered by DW_AT_location":1
; CHECK: "#local vars - entry values with [60%,70%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with [70%,80%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with [80%,90%) of parent scope covered by DW_AT_location":1
; CHECK: "#local vars - entry values with [90%,100%) of parent scope covered by DW_AT_location":0
; CHECK: "#local vars - entry values with 100% of parent scope covered by DW_AT_location":1
; The source code of the test case:
; extern void fn3(int *);
; extern void fn2 (int);
@ -102,7 +102,7 @@
; fn2 (a);
; u --;
; }
;
; __attribute__((noinline))
; int f()
; {
@ -112,7 +112,7 @@
; fn1 (l, k);
; return 0;
; }
;
; ModuleID = 'test.c'
source_filename = "test.c"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"

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@ -5,8 +5,8 @@
# RUN: llvm-mc -triple x86_64-pc-linux %s -filetype=obj -o %t
# RUN: llvm-dwarfdump --statistics %t | FileCheck %s
# CHECK: "vars scope bytes total":12
# CHECK: "vars scope bytes covered":8
# CHECK: "sum_all_local_vars(#bytes in parent scope)":12
# CHECK: "sum_all_local_vars(#bytes in parent scope covered by DW_AT_location)":8
.text

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@ -69,28 +69,28 @@ RUN: llvm-dwarfdump --statistics statistics-fib.split-dwarf.o | FileCheck %s
# }
#
CHECK: "version":4
CHECK: "source functions":3
CHECK: "source functions with location":3
CHECK: "inlined functions":7
CHECK: "inlined funcs with abstract origins":7
CHECK: "unique source variables":9
CHECK: "source variables":30
CHECK: "version":5
CHECK: "#functions":3
CHECK: "#functions with location":3
CHECK: "#inlined functions":7
CHECK: "#inlined functions with abstract origins":7
CHECK: "#unique source variables":9
CHECK: "#source variables":30
# Ideally the value below would be 33 but currently it's not.
CHECK: "variables with location":22
CHECK: "call site entries":7
CHECK: "scope bytes total":2817
CHECK: "scope bytes covered":1160
CHECK: "total function size":594
CHECK: "total inlined function size":345
CHECK: "total formal params":12
CHECK: "formal params with source location":12
CHECK: "formal params with type":12
CHECK: "formal params with binary location":12
CHECK: "total vars":18
CHECK: "vars with source location":18
CHECK: "vars with type":18
CHECK: "#source variables with location":22
CHECK: "#call site entries":7
CHECK: "sum_all_variables(#bytes in parent scope)":2817
CHECK: "sum_all_variables(#bytes in parent scope covered by DW_AT_location)":1160
CHECK: "#bytes witin functions":594
CHECK: "#bytes witin inlined functions":345
CHECK: "#params":12
CHECK: "#params with source location":12
CHECK: "#params with type":12
CHECK: "#params with binary location":12
CHECK: "#local vars":18
CHECK: "#local vars with source location":18
CHECK: "#local vars with type":18
# Ideally the value below would be 18, but currently it's not.
CHECK: "vars with binary location":10
CHECK: "#local vars with binary location":10

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@ -64,28 +64,28 @@ RUN: llvm-dwarfdump --statistics %t-statistics-fib.o | FileCheck %s
# }
#
CHECK: "version":4
CHECK: "source functions":3
CHECK: "source functions with location":3
CHECK: "inlined functions":8
CHECK: "inlined funcs with abstract origins":8
CHECK: "unique source variables":9
CHECK: "source variables":33
CHECK: "version":5
CHECK: "#functions":3
CHECK: "#functions with location":3
CHECK: "#inlined functions":8
CHECK: "#inlined functions with abstract origins":8
CHECK: "#unique source variables":9
CHECK: "#source variables":33
# Ideally the value below would be 33 but currently it's not.
CHECK: "variables with location":24
CHECK: "call site entries":8
CHECK: "scope bytes total":3072
CHECK: "scope bytes covered":1188
CHECK: "total function size":636
CHECK: "total inlined function size":388
CHECK: "total formal params":13
CHECK: "formal params with source location":13
CHECK: "formal params with type":13
CHECK: "formal params with binary location":13
CHECK: "total vars":20
CHECK: "vars with source location":20
CHECK: "vars with type":20
CHECK: "#source variables with location":24
CHECK: "#call site entries":8
CHECK: "sum_all_variables(#bytes in parent scope)":3072
CHECK: "sum_all_variables(#bytes in parent scope covered by DW_AT_location)":1188
CHECK: "#bytes witin functions":636
CHECK: "#bytes witin inlined functions":388
CHECK: "#params":13
CHECK: "#params with source location":13
CHECK: "#params with type":13
CHECK: "#params with binary location":13
CHECK: "#local vars":20
CHECK: "#local vars with source location":20
CHECK: "#local vars with type":20
# Ideally the value below would be 20, but currently it's not.
CHECK: "vars with binary location":11
CHECK: "#local vars with binary location":11

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@ -1,6 +1,6 @@
; RUN: llc -O0 %s -o - -filetype=obj \
; RUN: | llvm-dwarfdump -statistics - | FileCheck %s
; CHECK: "version":4
; CHECK: "version":5
; namespace test {
; extern int a;
@ -35,24 +35,24 @@
; - non-constant member S:fn,
; - arguments of S:fn.
; CHECK: "unique source variables":9
; CHECK: "#unique source variables":9
; +1 extra inline i.
; CHECK: "source variables":10
; CHECK: "#source variables":10
; -1 square::i
; CHECK: "variables with location":9
; CHECK: "scope bytes total":[[BYTES:[0-9]+]]
; CHECK: "#source variables with location":9
; CHECK: "sum_all_local_vars(#bytes in parent scope)":[[BYTES:[0-9]+]]
; Because of the dbg.value in the middle of the function, the pc range coverage
; must be below 100%.
; CHECK-NOT: "scope bytes covered":0
; CHECK-NOT: "scope bytes covered":[[BYTES]]
; CHECK: "scope bytes covered":
; CHECK: "total function size":[[FUNCSIZE:[0-9]+]]
; CHECK: "total inlined function size":[[INLINESIZE:[0-9]+]]
; CHECK: "size of __debug_info":380
; CHECK: "size of __debug_loc":35
; CHECK: "size of __debug_abbrev":303
; CHECK: "size of __debug_line":117
; CHECK: "size of __debug_str":204
; CHECK-NOT: "sum_all_local_vars(#bytes in parent scope covered by DW_AT_location)":0
; CHECK-NOT "sum_all_local_vars(#bytes in parent scope covered by DW_AT_location)":[[BYTES]]
; CHECK: "sum_all_local_vars(#bytes in parent scope covered by DW_AT_location)":
; CHECK: "#bytes witin functions":[[FUNCSIZE:[0-9]+]]
; CHECK: "#bytes witin inlined functions":[[INLINESIZE:[0-9]+]]
; CHECK: "#bytes in __debug_info":380
; CHECK: "#bytes in __debug_loc":35
; CHECK: "#bytes in __debug_abbrev":303
; CHECK: "#bytes in __debug_line":117
; CHECK: "#bytes in __debug_str":204
; ModuleID = '/tmp/quality.cpp'
source_filename = "/tmp/quality.cpp"

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@ -12,8 +12,8 @@
; foo(&local1, arg2, 10, 15, arg3 + 3, arg1 + arg2);
; }
;
; CHECK: "call site DIEs":2
; CHECK-SAME: "call site parameter DIEs":6
; CHECK: "#call site DIEs":2
; CHECK-SAME: "#call site parameter DIEs":6
;
; ModuleID = 'test.c'
source_filename = "test.c"

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@ -3,11 +3,11 @@
; Test that abstract origins in multiple CUs are uniqued.
; CHECK: "source functions":4,
; CHECK-SAME: "inlined functions":2,
; CHECK-SAME: "unique source variables":4
; CHECK-SAME: "source variables":6
; CHECK-SAME: "variables with location":6
; CHECK: "#functions":4,
; CHECK-SAME: "#inlined functions":2,
; CHECK-SAME: "#unique source variables":4
; CHECK-SAME: "#source variables":6
; CHECK-SAME: "#source variables with location":6
;header.h:
;extern "C" int getchar();

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@ -4,11 +4,11 @@
; This test serves as a baseline / sanity-check for stats-inlining-multi-cu.ll
; The results for both tests should be identical.
; CHECK: "source functions":4,
; CHECK-SAME: "inlined functions":2,
; CHECK-SAME: "unique source variables":4
; CHECK-SAME: "source variables":6
; CHECK-SAME: "variables with location":6
; CHECK: "#functions":4,
; CHECK-SAME: "#inlined functions":2,
; CHECK-SAME: "#unique source variables":4
; CHECK-SAME: "#source variables":6
; CHECK-SAME: "#source variables with location":6
;header.h:
;extern "C" int getchar();

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@ -18,12 +18,12 @@
; #include "test.h"
; int far() { return foo(42); }
; CHECK: "source functions":3
; CHECK-SAME: "source functions with location":3
; CHECK-SAME: "inlined functions":0
; CHECK-SAME: "unique source variables":1
; CHECK-SAME: "source variables":2
; CHECK-SAME: "variables with location":2
; CHECK: "#functions":3
; CHECK-SAME: "#functions with location":3
; CHECK-SAME: "#inlined functions":0
; CHECK-SAME: "#unique source variables":1
; CHECK-SAME: "#source variables":2
; CHECK-SAME: "#source variables with location":2
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

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@ -16,8 +16,8 @@
; #include "test.h"
; s S2;
; CHECK: "source variables":4
; CHECK-SAME: "variables with location":4
; CHECK: "#source variables":4
; CHECK-SAME: "#source variables with location":4
source_filename = "llvm-link"
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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@ -3,9 +3,9 @@
; Test that statistics distinguish functions with the same name.
; CHECK: "source functions":4,
; CHECK-SAME: "unique source variables":2
; CHECK-SAME: "source variables":2
; CHECK: "#functions":4,
; CHECK-SAME: "#unique source variables":2
; CHECK-SAME: "#source variables":2
; $ cat test1.cpp
; static int foo(int a) {

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@ -58,14 +58,14 @@ struct PerFunctionStats {
unsigned NumParamTypes = 0;
/// Number of function parameters with a DW_AT_location.
unsigned NumParamLocations = 0;
/// Number of variables.
unsigned NumVars = 0;
/// Number of variables with source location.
unsigned NumVarSourceLocations = 0;
/// Number of variables with type.
unsigned NumVarTypes = 0;
/// Number of variables with DW_AT_location.
unsigned NumVarLocations = 0;
/// Number of local variables.
unsigned NumLocalVars = 0;
/// Number of local variables with source location.
unsigned NumLocalVarSourceLocations = 0;
/// Number of local variables with type.
unsigned NumLocalVarTypes = 0;
/// Number of local variables with DW_AT_location.
unsigned NumLocalVarLocations = 0;
};
/// Holds accumulated global statistics about DIEs.
@ -80,21 +80,19 @@ struct GlobalStats {
/// Total number of PC range bytes covered by DW_AT_locations of
/// formal parameters.
unsigned ParamScopeBytesCovered = 0;
/// Total number of PC range bytes in each variable's enclosing scope
/// (only for parameters).
/// Total number of PC range bytes in each parameter's enclosing scope.
unsigned ParamScopeBytes = 0;
/// Total number of PC range bytes covered by DW_AT_locations with
/// the debug entry values (DW_OP_entry_value) (only for parameters).
unsigned ParamScopeEntryValueBytesCovered = 0;
/// Total number of PC range bytes covered by DW_AT_locations (only for local
/// variables).
unsigned VarScopeBytesCovered = 0;
/// Total number of PC range bytes in each variable's enclosing scope
/// (only for local variables).
unsigned VarScopeBytes = 0;
unsigned LocalVarScopeBytesCovered = 0;
/// Total number of PC range bytes in each local variable's enclosing scope.
unsigned LocalVarScopeBytes = 0;
/// Total number of PC range bytes covered by DW_AT_locations with
/// the debug entry values (DW_OP_entry_value) (only for local variables).
unsigned VarScopeEntryValueBytesCovered = 0;
unsigned LocalVarScopeEntryValueBytesCovered = 0;
/// Total number of call site entries (DW_AT_call_file & DW_AT_call_line).
unsigned CallSiteEntries = 0;
/// Total number of call site DIEs (DW_TAG_call_site).
@ -130,10 +128,10 @@ struct LocationStats {
std::vector<unsigned> ParamNonEntryValLocStats{
std::vector<unsigned>(NumOfCoverageCategories, 0)};
/// The debug location statistics for local variables.
std::vector<unsigned> VarLocStats{
std::vector<unsigned> LocalVarLocStats{
std::vector<unsigned>(NumOfCoverageCategories, 0)};
/// Map non debug entry values coverage for local variables.
std::vector<unsigned> VarNonEntryValLocStats{
std::vector<unsigned> LocalVarNonEntryValLocStats{
std::vector<unsigned>(NumOfCoverageCategories, 0)};
/// Total number of local variables and function parameters processed.
unsigned NumVarParam = 0;
@ -148,8 +146,8 @@ struct LocationStats {
static void collectLocStats(uint64_t BytesCovered, uint64_t BytesInScope,
std::vector<unsigned> &VarParamLocStats,
std::vector<unsigned> &ParamLocStats,
std::vector<unsigned> &VarLocStats, bool IsParam,
bool IsLocalVar) {
std::vector<unsigned> &LocalVarLocStats,
bool IsParam, bool IsLocalVar) {
auto getCoverageBucket = [BytesCovered, BytesInScope]() -> unsigned {
// No debug location at all for the variable.
if (BytesCovered == 0)
@ -168,7 +166,7 @@ static void collectLocStats(uint64_t BytesCovered, uint64_t BytesInScope,
if (IsParam)
ParamLocStats[CoverageBucket]++;
else if (IsLocalVar)
VarLocStats[CoverageBucket]++;
LocalVarLocStats[CoverageBucket]++;
}
/// Construct an identifier for a given DIE from its Prefix, Name, DeclFileName
/// and DeclLine. The identifier aims to be unique for any unique entities,
@ -214,7 +212,7 @@ static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
uint64_t BytesEntryValuesCovered = 0;
auto &FnStats = FnStatMap[FnPrefix];
bool IsParam = Die.getTag() == dwarf::DW_TAG_formal_parameter;
bool IsVariable = Die.getTag() == dwarf::DW_TAG_variable;
bool IsLocalVar = Die.getTag() == dwarf::DW_TAG_variable;
bool IsConstantMember = Die.getTag() == dwarf::DW_TAG_member &&
Die.find(dwarf::DW_AT_const_value);
@ -230,13 +228,13 @@ static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
return;
}
if (!IsParam && !IsVariable && !IsConstantMember) {
if (!IsParam && !IsLocalVar && !IsConstantMember) {
// Not a variable or constant member.
return;
}
// Ignore declarations of global variables.
if (IsVariable && Die.find(dwarf::DW_AT_declaration))
if (IsLocalVar && Die.find(dwarf::DW_AT_declaration))
return;
if (Die.findRecursively(dwarf::DW_AT_decl_file) &&
@ -293,17 +291,17 @@ static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
LocStats.NumVarParam++;
if (IsParam)
LocStats.NumParam++;
else if (IsVariable)
else if (IsLocalVar)
LocStats.NumVar++;
collectLocStats(BytesCovered, BytesInScope, LocStats.VarParamLocStats,
LocStats.ParamLocStats, LocStats.VarLocStats, IsParam,
IsVariable);
LocStats.ParamLocStats, LocStats.LocalVarLocStats, IsParam,
IsLocalVar);
// Non debug entry values coverage statistics.
collectLocStats(BytesCovered - BytesEntryValuesCovered, BytesInScope,
LocStats.VarParamNonEntryValLocStats,
LocStats.ParamNonEntryValLocStats,
LocStats.VarNonEntryValLocStats, IsParam, IsVariable);
LocStats.LocalVarNonEntryValLocStats, IsParam, IsLocalVar);
}
// Collect PC range coverage data.
@ -324,10 +322,12 @@ static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
std::min(BytesInScope, BytesCovered);
GlobalStats.ParamScopeBytes += BytesInScope;
GlobalStats.ParamScopeEntryValueBytesCovered += BytesEntryValuesCovered;
} else if (IsVariable) {
GlobalStats.VarScopeBytesCovered += std::min(BytesInScope, BytesCovered);
GlobalStats.VarScopeBytes += BytesInScope;
GlobalStats.VarScopeEntryValueBytesCovered += BytesEntryValuesCovered;
} else if (IsLocalVar) {
GlobalStats.LocalVarScopeBytesCovered +=
std::min(BytesInScope, BytesCovered);
GlobalStats.LocalVarScopeBytes += BytesInScope;
GlobalStats.LocalVarScopeEntryValueBytesCovered +=
BytesEntryValuesCovered;
}
assert(GlobalStats.ScopeBytesCovered <= GlobalStats.ScopeBytes);
}
@ -352,14 +352,14 @@ static void collectStatsForDie(DWARFDie Die, std::string FnPrefix,
FnStats.NumParamSourceLocations++;
if (HasLoc)
FnStats.NumParamLocations++;
} else if (IsVariable) {
FnStats.NumVars++;
} else if (IsLocalVar) {
FnStats.NumLocalVars++;
if (HasType)
FnStats.NumVarTypes++;
FnStats.NumLocalVarTypes++;
if (HasSrcLoc)
FnStats.NumVarSourceLocations++;
FnStats.NumLocalVarSourceLocations++;
if (HasLoc)
FnStats.NumVarLocations++;
FnStats.NumLocalVarLocations++;
}
}
@ -473,33 +473,41 @@ static void printDatum(raw_ostream &OS, const char *Key, json::Value Value) {
LLVM_DEBUG(llvm::dbgs() << Key << ": " << Value << '\n');
}
static void printLocationStats(raw_ostream &OS,
const char *Key,
static void printLocationStats(raw_ostream &OS, const char *Key,
std::vector<unsigned> &LocationStats) {
OS << ",\"" << Key << " with 0% of its scope covered\":"
OS << ",\"" << Key << " with 0% of parent scope covered by DW_AT_location\":"
<< LocationStats[0];
LLVM_DEBUG(llvm::dbgs() << Key << " with 0% of its scope covered: "
<< LocationStats[0] << '\n');
OS << ",\"" << Key << " with (0%,10%) of its scope covered\":"
LLVM_DEBUG(
llvm::dbgs() << Key
<< " with 0% of parent scope covered by DW_AT_location: \\"
<< LocationStats[0] << '\n');
OS << ",\"" << Key
<< " with (0%,10%) of parent scope covered by DW_AT_location\":"
<< LocationStats[1];
LLVM_DEBUG(llvm::dbgs() << Key << " with (0%,10%) of its scope covered: "
<< LocationStats[1] << '\n');
LLVM_DEBUG(llvm::dbgs()
<< Key
<< " with (0%,10%) of parent scope covered by DW_AT_location: "
<< LocationStats[1] << '\n');
for (unsigned i = 2; i < NumOfCoverageCategories - 1; ++i) {
OS << ",\"" << Key << " with [" << (i - 1) * 10 << "%," << i * 10
<< "%) of its scope covered\":" << LocationStats[i];
<< "%) of parent scope covered by DW_AT_location\":" << LocationStats[i];
LLVM_DEBUG(llvm::dbgs()
<< Key << " with [" << (i - 1) * 10 << "%," << i * 10
<< "%) of its scope covered: " << LocationStats[i]);
<< "%) of parent scope covered by DW_AT_location: "
<< LocationStats[i]);
}
OS << ",\"" << Key << " with 100% of its scope covered\":"
OS << ",\"" << Key
<< " with 100% of parent scope covered by DW_AT_location\":"
<< LocationStats[NumOfCoverageCategories - 1];
LLVM_DEBUG(llvm::dbgs() << Key << " with 100% of its scope covered: "
<< LocationStats[NumOfCoverageCategories - 1]);
LLVM_DEBUG(
llvm::dbgs() << Key
<< " with 100% of parent scope covered by DW_AT_location: "
<< LocationStats[NumOfCoverageCategories - 1]);
}
static void printSectionSizes(raw_ostream &OS, const SectionSizes &Sizes) {
for (const auto &DebugSec : Sizes.DebugSectionSizes)
OS << ",\"size of " << DebugSec.getKey() << "\":" << DebugSec.getValue();
OS << ",\"#bytes in " << DebugSec.getKey() << "\":" << DebugSec.getValue();
}
/// \}
@ -531,7 +539,7 @@ bool dwarfdump::collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
/// The version number should be increased every time the algorithm is changed
/// (including bug fixes). New metrics may be added without increasing the
/// version.
unsigned Version = 4;
unsigned Version = 5;
unsigned VarParamTotal = 0;
unsigned VarParamUnique = 0;
unsigned VarParamWithLoc = 0;
@ -543,17 +551,18 @@ bool dwarfdump::collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
unsigned ParamWithType = 0;
unsigned ParamWithLoc = 0;
unsigned ParamWithSrcLoc = 0;
unsigned VarTotal = 0;
unsigned VarWithType = 0;
unsigned VarWithSrcLoc = 0;
unsigned VarWithLoc = 0;
unsigned LocalVarTotal = 0;
unsigned LocalVarWithType = 0;
unsigned LocalVarWithSrcLoc = 0;
unsigned LocalVarWithLoc = 0;
for (auto &Entry : Statistics) {
PerFunctionStats &Stats = Entry.getValue();
unsigned TotalVars = Stats.VarsInFunction.size() *
(Stats.NumFnInlined + Stats.NumFnOutOfLine);
// Count variables in global scope.
if (!Stats.IsFunction)
TotalVars = Stats.NumVars + Stats.ConstantMembers + Stats.NumArtificial;
TotalVars =
Stats.NumLocalVars + Stats.ConstantMembers + Stats.NumArtificial;
unsigned Constants = Stats.ConstantMembers;
VarParamWithLoc += Stats.TotalVarWithLoc + Constants;
VarParamTotal += TotalVars;
@ -569,10 +578,10 @@ bool dwarfdump::collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
ParamWithType += Stats.NumParamTypes;
ParamWithLoc += Stats.NumParamLocations;
ParamWithSrcLoc += Stats.NumParamSourceLocations;
VarTotal += Stats.NumVars;
VarWithType += Stats.NumVarTypes;
VarWithLoc += Stats.NumVarLocations;
VarWithSrcLoc += Stats.NumVarSourceLocations;
LocalVarTotal += Stats.NumLocalVars;
LocalVarWithType += Stats.NumLocalVarTypes;
LocalVarWithLoc += Stats.NumLocalVarLocations;
LocalVarWithSrcLoc += Stats.NumLocalVarSourceLocations;
}
// Print summary.
@ -580,57 +589,97 @@ bool dwarfdump::collectStatsForObjectFile(ObjectFile &Obj, DWARFContext &DICtx,
OS << "{\"version\":" << Version;
LLVM_DEBUG(llvm::dbgs() << "Variable location quality metrics\n";
llvm::dbgs() << "---------------------------------\n");
printDatum(OS, "file", Filename.str());
printDatum(OS, "format", FormatName);
printDatum(OS, "source functions", NumFunctions);
printDatum(OS, "source functions with location", NumFuncsWithSrcLoc);
printDatum(OS, "inlined functions", NumInlinedFunctions);
printDatum(OS, "inlined funcs with abstract origins", NumAbstractOrigins);
printDatum(OS, "unique source variables", VarParamUnique);
printDatum(OS, "source variables", VarParamTotal);
printDatum(OS, "variables with location", VarParamWithLoc);
printDatum(OS, "call site entries", GlobalStats.CallSiteEntries);
printDatum(OS, "call site DIEs", GlobalStats.CallSiteDIEs);
printDatum(OS, "call site parameter DIEs", GlobalStats.CallSiteParamDIEs);
printDatum(OS, "scope bytes total", GlobalStats.ScopeBytes);
printDatum(OS, "scope bytes covered", GlobalStats.ScopeBytesCovered);
printDatum(OS, "entry value scope bytes covered",
printDatum(OS, "#functions", NumFunctions);
printDatum(OS, "#functions with location", NumFuncsWithSrcLoc);
printDatum(OS, "#inlined functions", NumInlinedFunctions);
printDatum(OS, "#inlined functions with abstract origins",
NumAbstractOrigins);
// This includes local variables and formal parameters.
printDatum(OS, "#unique source variables", VarParamUnique);
printDatum(OS, "#source variables", VarParamTotal);
printDatum(OS, "#source variables with location", VarParamWithLoc);
printDatum(OS, "#call site entries", GlobalStats.CallSiteEntries);
printDatum(OS, "#call site DIEs", GlobalStats.CallSiteDIEs);
printDatum(OS, "#call site parameter DIEs", GlobalStats.CallSiteParamDIEs);
printDatum(OS, "sum_all_variables(#bytes in parent scope)",
GlobalStats.ScopeBytes);
printDatum(OS,
"sum_all_variables(#bytes in parent scope covered by "
"DW_AT_location)",
GlobalStats.ScopeBytesCovered);
printDatum(OS,
"sum_all_variables(#bytes in parent scope covered by "
"DW_OP_entry_value)",
GlobalStats.ScopeEntryValueBytesCovered);
printDatum(OS, "formal params scope bytes total",
printDatum(OS, "sum_all_params(#bytes in parent scope)",
GlobalStats.ParamScopeBytes);
printDatum(OS, "formal params scope bytes covered",
GlobalStats.ParamScopeBytesCovered);
printDatum(OS, "formal params entry value scope bytes covered",
printDatum(
OS,
"sum_all_params(#bytes in parent scope covered by DW_AT_location)",
GlobalStats.ParamScopeBytesCovered);
printDatum(OS,
"sum_all_params(#bytes in parent scope covered by "
"DW_OP_entry_value)",
GlobalStats.ParamScopeEntryValueBytesCovered);
printDatum(OS, "vars scope bytes total", GlobalStats.VarScopeBytes);
printDatum(OS, "vars scope bytes covered", GlobalStats.VarScopeBytesCovered);
printDatum(OS, "vars entry value scope bytes covered",
GlobalStats.VarScopeEntryValueBytesCovered);
printDatum(OS, "total function size", GlobalStats.FunctionSize);
printDatum(OS, "total inlined function size", GlobalStats.InlineFunctionSize);
printDatum(OS, "total formal params", ParamTotal);
printDatum(OS, "formal params with source location", ParamWithSrcLoc);
printDatum(OS, "formal params with type", ParamWithType);
printDatum(OS, "formal params with binary location", ParamWithLoc);
printDatum(OS, "total vars", VarTotal);
printDatum(OS, "vars with source location", VarWithSrcLoc);
printDatum(OS, "vars with type", VarWithType);
printDatum(OS, "vars with binary location", VarWithLoc);
printDatum(OS, "total variables procesed by location statistics",
LocStats.NumVarParam);
printDatum(OS, "sum_all_local_vars(#bytes in parent scope)",
GlobalStats.LocalVarScopeBytes);
printDatum(OS,
"sum_all_local_vars(#bytes in parent scope covered by "
"DW_AT_location)",
GlobalStats.LocalVarScopeBytesCovered);
printDatum(OS,
"sum_all_local_vars(#bytes in parent scope covered by "
"DW_OP_entry_value)",
GlobalStats.LocalVarScopeEntryValueBytesCovered);
printDatum(OS, "#bytes witin functions", GlobalStats.FunctionSize);
printDatum(OS, "#bytes witin inlined functions",
GlobalStats.InlineFunctionSize);
// Print the summary for formal parameters.
printDatum(OS, "#params", ParamTotal);
printDatum(OS, "#params with source location", ParamWithSrcLoc);
printDatum(OS, "#params with type", ParamWithType);
printDatum(OS, "#params with binary location", ParamWithLoc);
// Print the summary for local variables.
printDatum(OS, "#local vars", LocalVarTotal);
printDatum(OS, "#local vars with source location", LocalVarWithSrcLoc);
printDatum(OS, "#local vars with type", LocalVarWithType);
printDatum(OS, "#local vars with binary location", LocalVarWithLoc);
// Print the debug section sizes.
printSectionSizes(OS, Sizes);
printLocationStats(OS, "variables", LocStats.VarParamLocStats);
printLocationStats(OS, "variables (excluding the debug entry values)",
// Print the location statistics for variables (includes local variables
// and formal parameters).
printDatum(OS, "#variables processed by location statistics",
LocStats.NumVarParam);
printLocationStats(OS, "#variables", LocStats.VarParamLocStats);
printLocationStats(OS, "#variables - entry values",
LocStats.VarParamNonEntryValLocStats);
printDatum(OS, "total params procesed by location statistics",
LocStats.NumParam);
printLocationStats(OS, "params", LocStats.ParamLocStats);
printLocationStats(OS, "params (excluding the debug entry values)",
// Print the location statistics for formal parameters.
printDatum(OS, "#params processed by location statistics", LocStats.NumParam);
printLocationStats(OS, "#params", LocStats.ParamLocStats);
printLocationStats(OS, "#params - entry values",
LocStats.ParamNonEntryValLocStats);
printDatum(OS, "total vars procesed by location statistics", LocStats.NumVar);
printLocationStats(OS, "vars", LocStats.VarLocStats);
printLocationStats(OS, "vars (excluding the debug entry values)",
LocStats.VarNonEntryValLocStats);
// Print the location statistics for local variables.
printDatum(OS, "#local vars processed by location statistics",
LocStats.NumVar);
printLocationStats(OS, "#local vars", LocStats.LocalVarLocStats);
printLocationStats(OS, "#local vars - entry values",
LocStats.LocalVarNonEntryValLocStats);
OS << "}\n";
LLVM_DEBUG(
llvm::dbgs() << "Total Availability: "

View File

@ -188,74 +188,85 @@ def parse_locstats(opts, binary):
print ('error: No valid llvm-dwarfdump statistics found.')
sys.exit(1)
# TODO: Parse the statistics Version from JSON.
if opts.only_variables:
# Read the JSON only for local variables.
variables_total_locstats = \
json_parsed['total vars procesed by location statistics']
json_parsed['#local vars processed by location statistics']
variables_scope_bytes_covered = \
json_parsed['vars scope bytes covered']
json_parsed['sum_all_local_vars(#bytes in parent scope covered' \
' by DW_AT_location)']
variables_scope_bytes = \
json_parsed['vars scope bytes total']
json_parsed['sum_all_local_vars(#bytes in parent scope)']
if not opts.ignore_debug_entry_values:
for cov_bucket in coverage_buckets():
cov_category = "vars with {} of its scope covered".format(cov_bucket)
cov_category = "#local vars with {} of parent scope covered " \
"by DW_AT_location".format(cov_bucket)
variables_coverage_map[cov_bucket] = json_parsed[cov_category]
else:
variables_scope_bytes_entry_values = \
json_parsed['vars entry value scope bytes covered']
json_parsed['sum_all_local_vars(#bytes in parent scope ' \
'covered by DW_OP_entry_value)']
variables_scope_bytes_covered = variables_scope_bytes_covered \
- variables_scope_bytes_entry_values
for cov_bucket in coverage_buckets():
cov_category = \
"vars (excluding the debug entry values) " \
"with {} of its scope covered".format(cov_bucket)
"#local vars - entry values with {} of parent scope " \
"covered by DW_AT_location".format(cov_bucket)
variables_coverage_map[cov_bucket] = json_parsed[cov_category]
elif opts.only_formal_parameters:
# Read the JSON only for formal parameters.
variables_total_locstats = \
json_parsed['total params procesed by location statistics']
json_parsed['#params processed by location statistics']
variables_scope_bytes_covered = \
json_parsed['formal params scope bytes covered']
json_parsed['sum_all_params(#bytes in parent scope covered ' \
'by DW_AT_location)']
variables_scope_bytes = \
json_parsed['formal params scope bytes total']
json_parsed['sum_all_params(#bytes in parent scope)']
if not opts.ignore_debug_entry_values:
for cov_bucket in coverage_buckets():
cov_category = "params with {} of its scope covered".format(cov_bucket)
cov_category = "#params with {} of parent scope covered " \
"by DW_AT_location".format(cov_bucket)
variables_coverage_map[cov_bucket] = json_parsed[cov_category]
else:
variables_scope_bytes_entry_values = \
json_parsed['formal params entry value scope bytes covered']
json_parsed['sum_all_params(#bytes in parent scope covered ' \
'by DW_OP_entry_value)']
variables_scope_bytes_covered = variables_scope_bytes_covered \
- variables_scope_bytes_entry_values
for cov_bucket in coverage_buckets():
cov_category = \
"params (excluding the debug entry values) " \
"with {} of its scope covered".format(cov_bucket)
"#params - entry values with {} of parent scope covered" \
" by DW_AT_location".format(cov_bucket)
variables_coverage_map[cov_bucket] = json_parsed[cov_category]
else:
# Read the JSON for both local variables and formal parameters.
variables_total = \
json_parsed['source variables']
variables_with_loc = json_parsed['variables with location']
json_parsed['#source variables']
variables_with_loc = json_parsed['#source variables with location']
variables_total_locstats = \
json_parsed['total variables procesed by location statistics']
json_parsed['#variables processed by location statistics']
variables_scope_bytes_covered = \
json_parsed['scope bytes covered']
json_parsed['sum_all_variables(#bytes in parent scope covered ' \
'by DW_AT_location)']
variables_scope_bytes = \
json_parsed['scope bytes total']
json_parsed['sum_all_variables(#bytes in parent scope)']
if not opts.ignore_debug_entry_values:
for cov_bucket in coverage_buckets():
cov_category = "variables with {} of its scope covered". \
format(cov_bucket)
cov_category = "#variables with {} of parent scope covered " \
"by DW_AT_location".format(cov_bucket)
variables_coverage_map[cov_bucket] = json_parsed[cov_category]
else:
variables_scope_bytes_entry_values = \
json_parsed['entry value scope bytes covered']
json_parsed['sum_all_variables(#bytes in parent scope covered ' \
'by DW_OP_entry_value)']
variables_scope_bytes_covered = variables_scope_bytes_covered \
- variables_scope_bytes_entry_values
for cov_bucket in coverage_buckets():
cov_category = "variables (excluding the debug entry values) " \
"with {} of its scope covered". format(cov_bucket)
cov_category = \
"#variables - entry values with {} of parent scope covered " \
"by DW_AT_location".format(cov_bucket)
variables_coverage_map[cov_bucket] = json_parsed[cov_category]
return LocationStats(binary, variables_total, variables_total_locstats,