Create a star symbol for gaps at the start & end of sections

tools/binary_size/libsupersize/testdata/Console.golden

 # Show pydoc for main types:
 import models
 help(models)
 
 # Show all attributes of all symbols & per-section totals:
 Print(size_info, verbose=True)
 
 # Show two levels of .text, grouped by first two subdirectories
 text_syms = size_info.symbols.WhereInSection("t")
 by_path = text_syms.GroupBySourcePath(depth=2)
@@ skipping 23 matching lines @@
     map_file_name=../test.map
 
 Section Sizes (Total=43,785,380 bytes):
     .bss: 1,300,456 bytes (not included in totals)
     .data: 101,768 bytes (0.2%)
     .data.rel.ro: 1,065,224 bytes (2.4%)
     .data.rel.ro.local: 790,024 bytes (1.8%)
     .rodata: 5,927,652 bytes (13.5%)
     .text: 35,900,712 bytes (82.0%)
 
-Showing 43 symbols with total pss: 4036054 bytes
-.text=77.8kb     .rodata=2.52mb     other=1.25mb     total=3.85mb
+Showing 48 symbols with total pss: 44309900 bytes
+.text=34.2mb     .rodata=5.65mb     other=2.37mb     total=42.3mb
 Number of object files: 10
 
 First columns are: running total, address, pss
- 1965409 r@0x266e600  1965409 {no path}
+35821002 t@0x24ca628  35821002 {no path}
+             ** symbol gap 2 (end of section)
+39107114 r@0x2c158e4  3286112 {no path}
+             ** symbol gap 3 (end of section)
+41072523 r@0x266e600  1965409 {no path}
              ** merge strings
- 2755313 d@0x2c17740  789904  third_party/container.c
+42137655 d@0x2ddc608  1065132 {no path}
+             ** symbol gap 3 (end of section)
+42927559 d@0x2c17740  789904  third_party/container.c
              chrome::mojom::FieldTrialRecorderProxy [vtable]
- 3431298 r@0x284e518  675985  {no path}
+43603544 r@0x284e518  675985  {no path}
              ** merge strings
- 3500422 t@0x28f1e0   69124   third_party/icu/ucnv_ext.c
+43705144 d@0x2dffd88  101600  {no path}
+             ** symbol gap 3 (end of section)
+43774268 t@0x28f1e0   69124   third_party/icu/ucnv_ext.c
              foo_bar
- 3506140 t@0x28f000   5718    third_party/icu/ucnv_ext.c
+43779986 t@0x28f000   5718    third_party/icu/ucnv_ext.c
              ** symbol gap 0
- 3510180 t@0x2a1000   4040    third_party/container.c
+43784026 t@0x2a1000   4040    third_party/container.c
              ** symbol gap 1
- 3510628 t@0x28f000   448     third_party/icu/ucnv_ext.c
+43784474 t@0x28f000   448     third_party/icu/ucnv_ext.c
              ucnv_extMatchFromU
- 3510780 d@0x2de7008  152     third_party/container.c
+43784626 d@0x2de7008  152     third_party/container.c
              base::android::kBaseRegisteredMethods
- 3510874 t@0x2a1000   94      third_party/container.c
+43784720 t@0x2a1000   94      third_party/container.c
              blink::PaintChunker::releasePaintChunks [clone .part.1]
- 3510930 d@0x2c176f0  56      third_party/icu/ucnv_ext.c
+43784776 d@0x2c176f0  56      third_party/icu/ucnv_ext.c
              ChromeMainDelegate [vtable]
- 3510986 d@0x2cd8500  56      third_party/paint.cc
+43784832 d@0x2cd8500  56      third_party/paint.cc
              ChromeMainDelegateAndroid [vtable]
- 3511042 t@0x28d910   56      base/page_allocator.cc
+43784888 t@0x28d910   56      base/page_allocator.cc
              _GLOBAL__sub_I_bbr_sender.cc
- 3511097 r@0x28f3450  55      third_party/paint.cc
+43784943 r@0x28f3450  55      third_party/paint.cc
              kAnimationFrameTimeHistogramClassPath
- 3511121 t@0x2a0000   24      third_party/icu/ucnv_ext.c
+43784967 t@0x2a0000   24      third_party/icu/ucnv_ext.c
              BazAlias
- 3511145 t@0x2a0000   24      {no path}
+43784991 t@0x2a0000   24      {no path}
              blink::ContiguousContainerBase::shrinkToFit
- 3511189 r@0x284e370  44      base/page_allocator.cc
+43785035 r@0x284e370  44      base/page_allocator.cc
              Name
- 3511227 t@0x28d964   38      base/page_allocator.cc
+43785073 t@0x28d964   38      base/page_allocator.cc
              extFromUUseMapping
- 3511259 d@0x2cd84e0  32      third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libcontroller_api_impl.a_controller_api_impl.o
+43785105 d@0x2cd84e0  32      third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libcontroller_api_impl.a_controller_api_impl.o
              .Lswitch.table.45
- 3511291 r@0x284e398  32      third_party/container.c
+43785137 r@0x284e398  32      third_party/container.c
              chrome::mojom::FilePatcher::Name_
- 3511323 t@0x28d98a   32      base/page_allocator.cc
+43785169 t@0x28d98a   32      base/page_allocator.cc
              extFromUUseMapping
- 3511351 t@0x28f1c8   28      third_party/icu/ucnv_ext.c
+43785197 t@0x28f1c8   28      third_party/icu/ucnv_ext.c
              _GLOBAL__sub_I_SkDeviceProfile.cpp
- 3511379 t@0x28d948   28      base/page_allocator.cc
+43785225 t@0x28d948   28      base/page_allocator.cc
              _GLOBAL__sub_I_pacing_sender.cc
- 3511407 t@0x2a0020   28      third_party/container.c
+43785253 t@0x2a0020   28      third_party/container.c
              blink::ContiguousContainerBase::ContiguousContainerBase
- 3511431 d@0x2c17728  24      third_party/icu/ucnv_ext.c
+43785277 d@0x2c17728  24      third_party/icu/ucnv_ext.c
              chrome::mojom::FieldTrialRecorder [vtable]
- 3511455 d@0x2cd8538  24      base/page_allocator.cc
+43785301 d@0x2cd8538  24      base/page_allocator.cc
              mojo::MessageReceiver [vtable]
- 3511471 t@0x28d900   16      base/page_allocator.cc
+43785317 t@0x28d900   16      base/page_allocator.cc
              _GLOBAL__sub_I_page_allocator.cc
- 3511475 t@0x2a0010   4       third_party/fft_float.cc
+43785321 t@0x2a0010   4       third_party/fft_float.cc
              BarAlias
- 3511479 t@0x2a0010   4       third_party/fft_float.cc
+43785325 t@0x2a0010   4       third_party/fft_float.cc
              FooAlias
- 3511483 t@0x2a0010   4       third_party/{shared}/2
+43785329 t@0x2a0010   4       third_party/{shared}/2
              blink::ContiguousContainerBase::shrinkToFit [clone .part.1234] [clone .isra.2]
- 3511495 d@0x2cd8550  12      base/page_allocator.cc
+43785341 d@0x2cd8550  12      base/page_allocator.cc
              kMethodsAnimationFrameTimeHistogram
- 3511506 r@0x284e364  11      base/page_allocator.cc
- 3511514 d@0x2cd84f0  8       third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libport_android_jni.a_jni_utils.o
+43785349 r@0x284e364  8       base/page_allocator.cc
+43785357 d@0x2cd84f0  8       third_party/gvr-android-sdk/libgvr_shim_static_arm.a/libport_android_jni.a_jni_utils.o
              kSystemClassPrefixes
- 3511518 d@0x2de70a4  4       third_party/container.c
+43785361 d@0x2de70a4  4       third_party/container.c
              base::android::g_library_version_number
- 3511522 d@0x2de70a0  4       third_party/container.c
+43785365 d@0x2de70a0  4       third_party/container.c
              base::android::g_renderer_histogram_code
- 3511526 r@0x28f3480  4       third_party/paint.cc
+43785369 r@0x28f3480  4       third_party/paint.cc
              blink::CSSValueKeywordsHash::findValueImpl::value_word_list
- 3511530 d@0x2de7000  4       base/page_allocator.cc
+43785373 d@0x2de7000  4       base/page_allocator.cc
              google::protobuf::internal::pLinuxKernelCmpxchg
- 3511534 d@0x2de7004  4       third_party/container.c
+43785377 d@0x2de7004  4       third_party/container.c
              google::protobuf::internal::pLinuxKernelMemoryBarrier
- 3511534 b@0x0        262144  third_party/fft_float.cc
+43785380 r@0x284e364  3       base/page_allocator.cc
+             ** symbol gap 2
+43785380 b@0x0        262144  third_party/fft_float.cc
              ff_cos_131072
- 3511534 b@0x0        131072  third_party/fft_fixed.cc
+43785380 b@0x0        131072  third_party/fft_fixed.cc
              ff_cos_131072_fixed
- 3511534 b@0x0        131072  third_party/fft_float.cc
+43785380 b@0x0        131072  third_party/fft_float.cc
              ff_cos_65536
- 3511534 b@0x2dffe80  200     third_party/icu/ucnv_ext.c
+43785380 b@0x2dffe80  200     third_party/icu/ucnv_ext.c
              SaveHistogram::atomic_histogram_pointer
- 3511534 b@0x2dffda0  28      third_party/icu/ucnv_ext.c
+43785380 b@0x2dffda0  28      third_party/icu/ucnv_ext.c
              g_chrome_content_browser_client
- 3511534 b@0x2dffe84  4       third_party/icu/ucnv_ext.c
+43785380 b@0x2dffe84  4       third_party/icu/ucnv_ext.c
              g_AnimationFrameTimeHistogram_clazz