Comments (4)
haberman
commented on May 5, 2024
I don't quite follow. Section names aren't hierarchical; they don't have multiple "levels". Am I missing something?
Could you give an example of the output you're getting and the output you would like to be getting?
from bloaty.
Phyllostachys
commented on May 5, 2024
So here is some output I'm getting:
> bloaty.exe -s vm someElf.axf
VM SIZE FILE SIZE
-------------- --------------
83.9% 117Ki .text 117Ki 16.4%
12.7% 17.9Ki [Unmapped] 40.8Ki 5.7%
1.5% 2.10Ki .bss 0 0.0%
1.1% 1.48Ki .data 1.48Ki 0.2%
0.6% 840 .ARM.exidx 840 0.1%
0.2% 288 .ARM.extab 288 0.0%
0.1% 148 [ELF Headers] 1.04Ki 0.1%
0.0% 0 .ARM.attributes 46 0.0%
0.0% 0 .comment 224 0.0%
0.0% 0 .debug_abbrev 23.8Ki 3.3%
0.0% 0 [Other] 532Ki 74.1%
100.0% 140Ki TOTAL 719Ki 100.0%
And here is a piece of the map file:
...
.text 0x00019a14 0x57d8 c:/siliconlabs/simplicitystudio/v3/developer/toolchains/gnu_arm/4.8_2013q4/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/lib/armv7e-m/softfp\libstdc++_s.a(cp-demangle.o)
0x0001f10c __cxa_demangle
0x0001f1d0 __gcclibcxx_demangle_callback
.text.fmod 0x0001f1ec 0xb4 c:/siliconlabs/simplicitystudio/v3/developer/toolchains/gnu_arm/4.8_2013q4/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/lib/armv7e-m/softfp\libm.a(lib_a-w_fmod.o)
0x0001f1ec fmod
.text.pow 0x0001f2a0 0x2f4 c:/siliconlabs/simplicitystudio/v3/developer/toolchains/gnu_arm/4.8_2013q4/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/lib/armv7e-m/softfp\libm.a(lib_a-w_pow.o)
0x0001f2a0 pow
.text.__ieee754_fmod
0x0001f594 0x27c c:/siliconlabs/simplicitystudio/v3/developer/toolchains/gnu_arm/4.8_2013q4/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/lib/armv7e-m/softfp\libm.a(lib_a-e_fmod.o)
0x0001f594 __ieee754_fmod
.text.__ieee754_pow
0x0001f810 0xa88 c:/siliconlabs/simplicitystudio/v3/developer/toolchains/gnu_arm/4.8_2013q4/bin/../lib/gcc/arm-none-eabi/4.8.3/../../../../arm-none-eabi/lib/armv7e-m/softfp\libm.a(lib_a-e_pow.o)
0x0001f810 __ieee754_pow
...
Those are just some sections loaded from standard libraries but there are also sections for code that I've written. That is...
.text._ZN11DataManager8writeLogEPKcs
0x00017104 0xa0 ./src/DataManager.o
0x00017104 DataManager::writeLog(char const*, short)
.text._ZN11DataManager11loadNextLogEPKc
0x000171a4 0x14c ./src/DataManager.o
0x000171a4 DataManager::loadNextLog(char const*)
.text._ZN11DataManager14releaseNextLogEv
0x000172f0 0x130 ./src/DataManager.o
0x000172f0 DataManager::releaseNextLog()
.text._ZN11DataManagerC2EPKcPc
0x00017420 0x240 ./src/DataManager.o
0x00017420 DataManager::DataManager(char const*, char*)
0x00017420 DataManager::DataManager(char const*, char*)
What I'd like to get is something like this (I only filled in the VM size and names)
VM SIZE FILE SIZE
-------------- --------------
83.9% 117Ki .text 117Ki 16.4%
576 .text._ZN11DataManagerC2EPKcPc
332 .text._ZN11DataManager11loadNextLogEPKc
304 .text._ZN11DataManager14releaseNextLogEv
160 .text._ZN11DataManager8writeLogEPKcs
I guess my assumption was that this info was like this in the elf file but doing some poking around with objdump, it seems I want something that is a combination of the section and symbol tables. Hmmm.
from bloaty.
haberman
commented on May 5, 2024
Hmm, I'm not familiar with those map files you pasted, do you know where that data is coming from? If the binary actually had sections named things like .text._ZN11DataManagerC2EPKcPc then Bloaty should be showing them!
it seems I want something that is a combination of the section and symbol tables
Have you tried bloaty -s vm -d sections,symbols someElf.axf? That should be a pretty nice breakdown by both section and symbol.
from bloaty.
Phyllostachys
commented on May 5, 2024
That does look more like what I was wanting. Thanks!
from bloaty.
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