forked from OSchip/llvm-project
df7c69952b
Summary: Memory reads using the ptrace API need to be executed on a designated thread and in 4-byte increments. The process_vm_read syscall has no such requirements and it is about 50 times faster. This patch makes lldb-server use the faster API if the target kernel supports it. Kernel support for this feature is determined at runtime. Using process_vm_writev in the same manner is more complicated since this syscall (unlike ptrace) respects page protection settings and so it cannot be used to set a breakpoint, since code pages are typically read-only. However, memory writes are not currently a performance bottleneck as they happen much more rarely. Test Plan: all tests continue to pass Reviewers: ovyalov, vharron Subscribers: tberghammer, lldb-commits Differential Revision: http://reviews.llvm.org/D10488 llvm-svn: 239924 |
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| .. | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| lit | ||
| lldb.xcodeproj | ||
| lldb.xcworkspace | ||
| resources | ||
| scripts | ||
| source | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .arcconfig | ||
| .clang-format | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.txt | ||
| INSTALL.txt | ||
| LICENSE.TXT | ||
| Makefile | ||