Unable to compiler egalito

[basavesh]

Not sure why this dependency is not met. Let me know if I should install some library for this. Trying on a fresh install of ubuntu 20.04

make[2]: Entering directory '/root/egalito/dep/rtld' gcc -std=c99 -Wall -Wextra -Wno-format -Wno-int-conversion -Wno-unused-parameter -g -o build_x86_64/load_test load_test.c readlink -f /usr/lib/gcc/x86_64-linux-gnu/9/../../../x86_64-linux-gnu/ld-linux-x86-64.so.2 > build_x86_64/interpreter readelf --dyn-syms /usr/lib/x86_64-linux-gnu/ld-2.31.so | grep rtld_global@ | awk '{ print $3 }' > build_x86_64/rtld_global_size readelf --dyn-syms /usr/lib/x86_64-linux-gnu/ld-2.31.so | grep rtld_global_ro@ | awk '{ print $3 }' > build_x86_64/rtld_global_ro_size gdb -n -q -x reconstruct.py -x rtld.gdb /usr/lib/x86_64-linux-gnu/ld-2.31.so | grep -v 'done\.' | grep -v 'Reading symbols' \ | sed 's/struct rtld/struct my_rtld/' > build_x86_64/rtld.h Python Exception <class 'gdb.error'> No struct type named rtld_global.: rtld.gdb:2: Error in sourced command file: Error occurred in Python: No struct type named rtld_global.

[dwks]

You need the libc and libstdc++ debug packages. On your system, it should be libc6-dbg and libstdc++6-7-dbg. Please try installing those and doing a clean rebuild.

[basavesh]

I have those libraries.

root@b1a068da59c6:/egalito# apt install libc6-dbg libstdc++6-7-dbg
Reading package lists... Done
Building dependency tree
Reading state information... Done
libstdc++6-7-dbg is already the newest version (7.5.0-6ubuntu2).
libc6-dbg is already the newest version (2.31-0ubuntu9.1).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
root@b1a068da59c6:/egalito# make clean
make -C app clean
make[1]: Entering directory '/root/egalito/app'
rm -rf build_x86_64/ .symlinks etshell etshell2 pyshell etobjdump etsandbox libsandbox.so etcoverage libcoverage.so etharden libcet.so etelf etprofile ettwocode etorder
make[1]: Leaving directory '/root/egalito/app'
make -C src clean
make[1]: Entering directory '/root/egalito/src'
rm -rf build_x86_64/ .symlinks loader libegalito.a libegalito.so libaddon.so ex example symbols.elf
make[1]: Leaving directory '/root/egalito/src'
make -C test clean
make[1]: Entering directory '/root/egalito/test'
make[1]: *** No rule to make target 'clean'. Stop.
make[1]: Leaving directory '/root/egalito/test'
make: *** [Makefile:38: clean] Error 2
root@b1a068da59c6:~/egalito# make
make -C dep
make[1]: Entering directory '/root/egalito/dep'
make -C rtld
make[2]: Entering directory '/root/egalito/dep/rtld'
gdb -n -q -x reconstruct.py -x rtld.gdb /usr/lib/x86_64-linux-gnu/ld-2.31.so | grep -v 'done.' | grep -v 'Reading symbols'
| sed 's/struct rtld/struct my_rtld/' > build_x86_64/rtld.h
Python Exception <class 'gdb.error'> No struct type named rtld_global.:
rtld.gdb:2: Error in sourced command file:
Error occurred in Python: No struct type named rtld_global.

[dwks]

It looks like Ubuntu 20.04 has moved away from .build-id references for debug files, and starting to use full paths (like Fedora). Egalito handles both but Ubuntu's GDB doesn't seem to be configured that way. I added a hack to the ubuntu20.04 branch to work around this until GDB can find symbol files properly.

https://github.com/columbia/egalito/tree/ubuntu20.04

[basavesh]

Thank You! did make some progress. But, could not build it.

Here is the error.

make -C config
make[1]: Entering directory '/home/basavesh/egalito/config'
make[1]: Leaving directory '/home/basavesh/egalito/config'
make -C src
make[1]: Entering directory '/home/basavesh/egalito/src'
CXX transform/data.cpp
In file included from transform/data.cpp:8:
./../dep/rtld/pthread.h:1:63: error: too many decimal points in number
1 | (No debugging symbols found in /usr/lib/x86_64-linux-gnu/libc-2.31.so)
| ^~~~~~~
./../dep/rtld/pthread.h:1:4: error: expected ‘)’ before ‘debugging’
1 | (No debugging symbols found in /usr/lib/x86_64-linux-gnu/libc-2.31.so)
| ~ ^~~~~~~~~~
| )
transform/data.cpp: In member function ‘address_t DataLoader::allocateTLS(address_t, size_t, size_t*)’:
transform/data.cpp:33:37: error: invalid application of ‘sizeof’ to incomplete type ‘DataLoader::allocateTLS(address_t, size_t, size_t*)::my_pthread’
33 | size += sizeof(struct my_pthread);
| ^
make[1]: *** [../env.mk:180: build_x86_64/transform/data.o] Error 1
make[1]: Leaving directory '/home/basavesh/egalito/src'
make: *** [Makefile:21: src] Error 2

[dwks]

It's doing code generation. Look at generate1.cpp for example. Every time it can't find a debug package gdb will print an error message and that ends up in the code instead. Try adding

add-symbol-file /usr/lib/debug/lib/x86_64-linux-gnu/libc-2.31.so

to dep/rtld/symbols.gdb. You can also test with

gdb /lib/x86_64-linux-gnu/libc-2.31.so
gdb /lib/x86_64-linux-gnu/ld-2.28.so

Basically, those two have to find symbols.

[basavesh]

I'm still having issues with Ubuntu 20.04. However, I'm able to compile it fine in Ubuntu 18.04. Thank you!

Error in Ubuntu 20.04
transform/data.cpp:8:14: fatal error: ../dep/rtld/pthread.h: No such file or directory
8 | #include "../dep/rtld/pthread.h"
| ^~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
make[1]: *** [../env.mk:180: build_x86_64/transform/data.o] Error 1
make[1]: Leaving directory '/root/egalito/src'
make: *** [Makefile:21: src] Error 2

[dwks]

The "dep/rtld" doesn't do make clean very well unless you explicitly go to that directory. To avoid problems, you can clone again from scratch. Glad 18.04 worked.

[benner]

On Ubuntu 21.04:

diff --git a/dep/rtld/symbols.gdb b/dep/rtld/symbols.gdb
index 8ab65314..6582030a 100644
--- a/dep/rtld/symbols.gdb
+++ b/dep/rtld/symbols.gdb
@@ -1 +1 @@
-symbol-file /usr/lib/debug/lib/x86_64-linux-gnu/ld-2.31.so
+symbol-file /usr/lib/debug/lib/x86_64-linux-gnu/ld-2.33.so