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[Apple Silicon] Initial support for Rosetta 

Translated processes talk with a different debugserver, shipped with
macOS 11. This patch detects whether a process is translated and
attaches to the correct debugserver implementation.
It's the first patch of a series. Tested on the lldb test suite.

Differential Revision:  https://reviews.llvm.org/D82491
This commit is contained in:
Davide Italiano 2020-06-24 12:18:29 -07:00
parent 35bb9bfbb0
commit fd19ddb8f2
1 changed files with 18 additions and 0 deletions
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18
lldb/source/Plugins/Process/gdb-remote/ProcessGDBRemote.cpp
View File

@ -17,6 +17,7 @@
#include <unistd.h>
#endif
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <time.h>
@ -3432,6 +3433,23 @@ Status ProcessGDBRemote::LaunchAndConnectToDebugserver(
std::bind(MonitorDebugserverProcess, this_wp, _1, _2, _3, _4), false);
debugserver_launch_info.SetUserID(process_info.GetUserID());
#if defined(__APPLE__)
// On macOS 11, we need to support x86_64 applications translated to
// arm64. We check whether a binary is translated and spawn the correct
// debugserver accordingly.
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID,
static_cast<int>(process_info.GetProcessID()) };
struct kinfo_proc processInfo;
size_t bufsize = sizeof(processInfo);
if (sysctl(mib, (unsigned)(sizeof(mib)/sizeof(int)), &processInfo,
&bufsize, NULL, 0) == 0 && bufsize > 0) {
if (processInfo.kp_proc.p_flag & P_TRANSLATED) {
FileSpec rosetta_debugserver("/Library/Apple/usr/libexec/oah/debugserver");
debugserver_launch_info.SetExecutableFile(rosetta_debugserver, false);
}
}
#endif
int communication_fd = -1;
#ifdef USE_SOCKETPAIR_FOR_LOCAL_CONNECTION
// Use a socketpair on non-Windows systems for security and performance