48 lines
1.8 KiB
Python
48 lines
1.8 KiB
Python
#!/usr/bin/env python
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#coding: utf-8
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#
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# Usage: run `command script import -r misc/lldb_yjit.py` on LLDB
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#
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from __future__ import print_function
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import lldb
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import os
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import shlex
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def list_comments(debugger, command, result, internal_dict):
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target = debugger.GetSelectedTarget()
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process = target.GetProcess()
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thread = process.GetSelectedThread()
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frame = thread.GetSelectedFrame()
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# Get the different types we need
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rb_darray_meta_t = target.FindFirstType("rb_darray_meta_t")
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codeblock_t = target.FindFirstType("codeblock_t")
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yjit_comment = target.FindFirstType("yjit_comment")
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# Get the global variables we need
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comments = target.FindFirstGlobalVariable("yjit_code_comments")
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cb = target.FindFirstGlobalVariable("cb").Cast(codeblock_t.GetPointerType())
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# Get the address of the memory block we're using
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mem_addr = cb.GetChildMemberWithName("mem_block").GetValueAsUnsigned()
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# Find the size of the darray comment list
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meta = comments.Cast(rb_darray_meta_t.GetPointerType())
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size = meta.GetChildMemberWithName("size").GetValueAsUnsigned()
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# Get the address of the block following the metadata header
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t_offset = comments.GetValueAsUnsigned() + rb_darray_meta_t.GetByteSize()
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# Loop through each comment and print
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for t in range(0, size):
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addr = lldb.SBAddress(t_offset + (t * yjit_comment.GetByteSize()), target)
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comment = target.CreateValueFromAddress("yjit_comment", addr, yjit_comment)
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string = comment.GetChildMemberWithName("comment")
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comment_offset = mem_addr + comment.GetChildMemberWithName("offset").GetValueAsUnsigned()
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print("%0#x %s" % (comment_offset, string.GetSummary()), file = result)
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def __lldb_init_module(debugger, internal_dict):
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debugger.HandleCommand("command script add -f lldb_yjit.list_comments lc")
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