6c77c35586
This patch adds support for listing and setting breakpoints on inlined functions within stripped binaries. It uses a forked version of `debug/gosym` copied from golang.org/x/vuln/internal/vulncheck/internal/gosym which adds support for parsing the inline tree of the pclntab section. Parsing this section requires knowing the offset of the "go:func.*" symbol, which is not present in stripped binaries via the ``.symtab` section so instead, we search the `.noptrdata` section which contains `runtime.moduledatap` which contains the value of that missing symbol, which we then can use to find the inline tree for a given function. Given all this we parse the inline tree for each function we find, and then add that information the the appropriate `Function` contained in `bi.Functions`, using a relatively empty `Function` struct as what would be the abstract origin.
59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
package proc
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import (
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"debug/elf"
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"debug/macho"
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"fmt"
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"github.com/go-delve/delve/pkg/internal/gosym"
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)
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func readPcLnTableElf(exe *elf.File, path string) (*gosym.Table, uint64, error) {
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// Default section label is .gopclntab
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sectionLabel := ".gopclntab"
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section := exe.Section(sectionLabel)
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if section == nil {
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// binary may be built with -pie
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sectionLabel = ".data.rel.ro.gopclntab"
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section = exe.Section(sectionLabel)
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if section == nil {
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return nil, 0, fmt.Errorf("could not read section .gopclntab")
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}
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}
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tableData, err := section.Data()
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if err != nil {
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return nil, 0, fmt.Errorf("found section but could not read .gopclntab")
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}
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addr := exe.Section(".text").Addr
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lineTable := gosym.NewLineTable(tableData, addr)
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symTable, err := gosym.NewTable([]byte{}, lineTable)
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if err != nil {
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return nil, 0, fmt.Errorf("could not create symbol table from %s ", path)
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}
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return symTable, section.Addr, nil
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}
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func readPcLnTableMacho(exe *macho.File, path string) (*gosym.Table, error) {
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// Default section label is __gopclntab
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sectionLabel := "__gopclntab"
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section := exe.Section(sectionLabel)
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if section == nil {
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return nil, fmt.Errorf("could not read section __gopclntab")
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}
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tableData, err := section.Data()
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if err != nil {
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return nil, fmt.Errorf("found section but could not read __gopclntab")
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}
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addr := exe.Section("__text").Addr
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lineTable := gosym.NewLineTable(tableData, addr)
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symTable, err := gosym.NewTable([]byte{}, lineTable)
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if err != nil {
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return nil, fmt.Errorf("could not create symbol table from %s ", path)
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}
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return symTable, nil
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}
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