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Switch to new kernel ptrace interface for reading tags.

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Bug: 135772972
Change-Id: I506429d7bff79f83828e1f0d5c0ea0468ee1580b
This commit is contained in:
Peter Collingbourne 2020-04-24 17:33:37 -07:00
parent d694a67865
commit 118c5ee6e6
1 changed files with 8 additions and 1 deletions
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9
libunwindstack/MemoryMte.cpp
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@ -17,6 +17,7 @@
#if defined(ANDROID_EXPERIMENTAL_MTE)
#include <sys/ptrace.h>
#include <sys/uio.h>
#include <bionic/mte.h>
#include <bionic/mte_kernel.h>
@ -28,7 +29,13 @@ namespace unwindstack {
long MemoryRemote::ReadTag(uint64_t addr) {
#if defined(__aarch64__)
return ptrace(PTRACE_PEEKTAG, pid_, (void*)addr, nullptr);
char tag;
iovec iov = {&tag, 1};
if (ptrace(PTRACE_PEEKMTETAGS, pid_, reinterpret_cast<void*>(addr), &iov) != 0 ||
iov.iov_len != 1) {
return -1;
}
return tag;
#else
(void)addr;
return -1;