Re^3: How perl debugger breakpoint works?

[PerlOnTheWay]

in reply to Re^2: How perl debugger breakpoint works?
in thread How perl debugger breakpoint works?

Yup, I want to know how debugger works.

I'm very familiar with its usage.

Every debugger needs to call ptrace finally, how does the bridge between Perl code and assembly work?

[BrowserUk]

Every debugger needs to call ptrace

Hardly.

• For a start, ptrace is a linux api.

  Do you think other operating systems don't have debuggers?

• Secondly, ptrace (or an equivalent) is only required if your are tracing at assembler level.

  Perl's debugger operates at the perl opcode level, each of which may represent many hundreds or thousands of assembler instructions.

  ptrace is not used by perl's debugger.

[PerlOnTheWay]

Then how does perl debugger work?

[BrowserUk]

Read on from Perl has special debugging hooks at compile-time and run-time used to create debugging environments."