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d0d2d47885
delve/pkg/proc/native
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Josh Stone d0d2d47885 proc/native/linux: try to use process_vm_readv/writev 
This change adds `ProcessVmRead` and `ProcessVmWrite` wrappers around
the syscalls `process_vm_readv` and `process_vm_writev`, available since
Linux 3.2. These follow the same permission model as `ptrace`, but they
don't actually require being attached, which means they can be called
directly from any thread in the debugger. They also use `iovec` to write
entire blocks at once, rather than having to peek/poke each `uintptr`.

These wrappers are used in `Thread.ReadMemory` and `WriteMemory`, still
falling back to `ptrace` if that fails for any reason.  Notably,
`process_vm_writev` respects memory protection, so it can't modify
read-only memory like `ptrace`. This frequently occurs when writing
breakpoints in read-only `.text`, so to avoid a lot of wasted `EFAULT`
calls, we only try `process_vm_writev` for larger writes.
2020-02-29 08:25:31 -08:00
..
exc_user_darwin.c proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
exc.h proc: refactoring: split backends to separate packages 2017-04-21 14:00:04 -07:00
exec_darwin.c proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
exec_darwin.h proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
mach_exc_user_darwin.c proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
mach_exc.h proc: refactoring: split backends to separate packages 2017-04-21 14:00:04 -07:00
nonative_darwin.go pkg/proc: Introduce Target and remove CommonProcess (#1834) 2020-01-21 12:41:24 -08:00
proc_darwin.c proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
proc_darwin.go *: Go 1.14 support branch (#1727) 2020-02-10 17:31:54 -08:00
proc_darwin.h proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
proc_freebsd.c *: FreeBSD initial support (#1480) 2019-07-12 18:28:04 -07:00
proc_freebsd.go *: Go 1.14 support branch (#1727) 2020-02-10 17:31:54 -08:00
proc_freebsd.h *: FreeBSD initial support (#1480) 2019-07-12 18:28:04 -07:00
proc_linux.go proc/native: optimize native.status through buffering (#1865) 2020-02-15 11:55:19 -08:00
proc_windows.go *: Go 1.14 support branch (#1727) 2020-02-10 17:31:54 -08:00
proc.go pkg/proc: Introduce Target and remove CommonProcess (#1834) 2020-01-21 12:41:24 -08:00
ptrace_darwin.go proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
ptrace_freebsd_amd64.c *: FreeBSD initial support (#1480) 2019-07-12 18:28:04 -07:00
ptrace_freebsd_amd64.h *: FreeBSD initial support (#1480) 2019-07-12 18:28:04 -07:00
ptrace_freebsd.go *: FreeBSD initial support (#1480) 2019-07-12 18:28:04 -07:00
ptrace_linux_amd64.go proc/native: separate amd64-arch code 2019-11-27 11:07:31 -08:00
ptrace_linux.go proc/native/linux: try to use process_vm_readv/writev 2020-02-29 08:25:31 -08:00
registers_darwin_amd64.go proc: only format registers value when it's necessary (#1860) 2020-02-12 13:31:48 -08:00
registers_freebsd_amd64.go *: FreeBSD initial support (#1480) 2019-07-12 18:28:04 -07:00
registers_linux_amd64.go *: Update import name to github.com/go-delve/delve 2019-01-04 19:43:13 +01:00
registers_linux_arm64.go pkg/proc: fix typo in the comment of PtraceGetFpRegset (#1848) 2020-01-27 10:20:56 +01:00
registers_windows_amd64.go *: Update import name to github.com/go-delve/delve 2019-01-04 19:43:13 +01:00
support_sentinel.go proc/native: better error message when building on unsupported systems (#1883) 2020-02-24 09:39:51 -08:00
syscall_windows_amd64.go proc: move windows register handling code to winutil package 2018-11-21 12:17:16 -08:00
syscall_windows.go *: Update import name to github.com/go-delve/delve 2019-01-04 19:43:13 +01:00
threads_darwin.c proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
threads_darwin.go *: Update import name to github.com/go-delve/delve 2019-01-04 19:43:13 +01:00
threads_darwin.h proc/native,Makefile: allow compiling on macOS without native backend 2018-10-02 10:46:09 -07:00
threads_freebsd.go *: FreeBSD initial support (#1480) 2019-07-12 18:28:04 -07:00
threads_linux_amd64.go proc/native: separate amd64-arch code 2019-11-27 11:07:31 -08:00
threads_linux_arm64.go proc/core: implementing coredump functionality for ARM64 (#1774) 2020-02-17 09:29:17 -08:00
threads_linux.go proc/native/linux: try to use process_vm_readv/writev 2020-02-29 08:25:31 -08:00
threads_windows.go *: Go 1.14 support branch (#1727) 2020-02-10 17:31:54 -08:00
threads.go pkg/proc: Introduce Target and remove CommonProcess (#1834) 2020-01-21 12:41:24 -08:00
zsyscall_windows.go proc: refactoring: split backends to separate packages 2017-04-21 14:00:04 -07:00