omjavaid added a comment.
Some new observations:
With this approach of not setting size of a non-last zero-sized symbol we
somehow mange to zero out size of init (_init symbol) and .text (_start symbol).
To build and evaluate a.out echo -e '#include <unistd.h>\nint
main(void){\nsync();return 0;}'|./bin/clang -g -x c -;./bin/lldb -o 'file
./a.out' -o 'b main' -o r -o 'p (void)sync()'
Please see objdump of a.out here https://pastebin.ubuntu.com/p/N5krm5TWFV/
Please see diff of symtab dump here: https://pastebin.ubuntu.com/p/zwmC9cVTGc/
symtab dump of a.out here with above patch applied:
https://pastebin.ubuntu.com/p/Fs4yyG82s5/
symtab dump of a.out here without above patch applied:
https://pastebin.ubuntu.com/p/TCKXVjnGsH/
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D63540/new/
https://reviews.llvm.org/D63540
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