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Correctly handle hardware breakpoints across threads

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* Set hardware breakpoints on all existing threads
* Set hardware breakpoints on any new thread the spawns

Fixes #111
This commit is contained in:
Derek Parker
2015-06-11 22:46:06 -05:00
parent d66dfbef54
commit 3fba1f7113
6 changed files with 28 additions and 18 deletions
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5
proctl/breakpoints_linux_amd64.go
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@ -46,11 +46,6 @@ func setHardwareBreakpoint(reg, tid int, addr uint64) error {
return PtracePokeUser(tid, dr7off, dr7)
}
// Error out if dr`reg` is already used
if dr7&(0x3<<uint(reg*C.DR_ENABLE_SIZE)) != 0 {
return fmt.Errorf("dr%d already enabled", reg)
}
// Set the debug register `reg` with the address of the
// instruction we want to trigger a debug exception.
if err := PtracePokeUser(tid, drxoff, uintptr(addr)); err != nil {