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With FEATURE_GDBJIT enabled, GDB never saw the JIT interface: - generate_exports_file passed all .src files to the version script generator, which only reads the first one (the second argument is a prefix). Concatenate multiple inputs first. - The generator scripts dropped a last line without a trailing newline, which gdbjit_unixexports.src had. - __jit_debug_register_code and __jit_debug_descriptor were hidden under -fvisibility=hidden, so the version script could not export them. Also fix the emitted ELF: the .debug_frame CIE return address column was 0 on all architectures, and .symtab had sh_info of 0. Co-authored-by: Cursor <cursoragent@cursor.com>
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osx-x64 dead-lettered. |
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With
FEATURE_GDBJITenabled, libcoreclr.so did not export__jit_debug_register_code/__jit_debug_descriptor, so GDB neverpicked up JIT'd code:
generate_exports_filepassed every.srcto the version scriptgenerator, which reads only the first file (the second argument is
a symbol prefix). Multiple inputs are now concatenated first.
-fvisibility=hidden; mark themDLLEXPORT.ELF output fixes:
.debug_frameCIE return address column was 0 on every arch(now rip/lr).
.symtabsh_infowas 0 (now 1).Tested on linux-x64 with GDB 17.1: method names resolve, pending
breakpoints arm when a method is JIT'd, and
btunwinds throughmanaged frames. Software breakpoints need
DOTNET_EnableWriteXorExecute=0(orhbreak), since JIT'd code ismapped shared read-execute.