Re^4: How perl debugger breakpoint works?

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.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.

"Science is about questioning the status quo. Questioning authority".

In the absence of evidence, opinion is indistinguishable from prejudice.

Comment on Re^4: How perl debugger breakpoint works?

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Re^5: How perl debugger breakpoint works? by PerlOnTheWay (Monk) on Sep 06, 2011 at 01:48 UTC
Then how does perl debugger work?	[reply]
Re^6: How perl debugger breakpoint works? by BrowserUk (Patriarch) on Sep 06, 2011 at 02:02 UTC
Read on from Perl has special debugging hooks at compile-time and run-time used to create debugging environments." Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error. "Science is about questioning the status quo. Questioning authority". In the absence of evidence, opinion is indistinguishable from prejudice.	[reply]