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pkg/proc: pad variable mem in extractVarInfoFromEntry (#3365)

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* pkg/proc: pad variable mem in extractVarInfoFromEntry

On 64 bit system, the byte size of the following struct is 16:
    type myStruct struct {
       a int
       b uint32
    }
But extractVarInfoFromEntry only allocates a mem of 12 bytes for it.
When calling method of this struct with the "call" command, it will
result in this error:
    write out of bounds

This patch extends the mem by adding padding bytes to the end of the
mem.

Fixes #3364.

* move the padding logic into newCompositeMemory
This commit is contained in:
Zeke Lu
2023-05-16 05:46:33 +08:00
committed by GitHub
parent 1c9792bce4
commit 463b97dd36
6 changed files with 29 additions and 10 deletions
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2
pkg/proc/dwarf_export_test.go
View File

@ -20,7 +20,7 @@ func NewCompositeMemory(p *Target, pieces []op.Piece, base uint64) (*compositeMe
dwarfregs := arch.RegistersToDwarfRegisters(0, regs)
dwarfregs.ChangeFunc = p.CurrentThread().SetReg
mem, err := newCompositeMemory(p.Memory(), arch, *dwarfregs, pieces)
mem, err := newCompositeMemory(p.Memory(), arch, *dwarfregs, pieces, 0)
if mem != nil {
mem.base = base
}