[XRay] Support for Fuchsia
This extends XRay to support Fuchsia. Differential Revision: https://reviews.llvm.org/D52162 llvm-svn: 347443
This commit is contained in:
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@ -641,7 +641,7 @@ else()
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endif()
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if (COMPILER_RT_HAS_SANITIZER_COMMON AND XRAY_SUPPORTED_ARCH AND
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OS_NAME MATCHES "Darwin|Linux|FreeBSD|NetBSD|OpenBSD")
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OS_NAME MATCHES "Darwin|Linux|FreeBSD|NetBSD|OpenBSD|Fuchsia")
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set(COMPILER_RT_HAS_XRAY TRUE)
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else()
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set(COMPILER_RT_HAS_XRAY FALSE)
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@ -31,6 +31,7 @@
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#include "sanitizer_atomic.h"
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#include "sanitizer_common.h"
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#include "sanitizer_internal_defs.h"
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#include "sanitizer_symbolizer_fuchsia.h"
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#include <zircon/process.h>
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#include <zircon/sanitizer.h>
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@ -101,7 +102,7 @@ class TracePcGuardController final {
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// uses the `dumpfile` symbolizer markup element to highlight the
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// dump. See the explanation for this in:
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// https://fuchsia.googlesource.com/zircon/+/master/docs/symbolizer_markup.md
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Printf("SanitizerCoverage: {{{dumpfile:%s:%s}}} with up to %u PCs\n",
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Printf("SanitizerCoverage: " FORMAT_DUMPFILE " with up to %u PCs\n",
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kSancovSinkName, vmo_name_, next_index_ - 1);
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}
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}
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@ -35,6 +35,9 @@ constexpr const char *kFormatData = "{{{data:%p}}}";
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// One frame in a backtrace (printed on a line by itself).
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constexpr const char *kFormatFrame = "{{{bt:%u:%p}}}";
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// Dump trigger element.
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#define FORMAT_DUMPFILE "{{{dumpfile:%s:%s}}}"
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} // namespace __sanitizer
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#endif // SANITIZER_SYMBOLIZER_FUCHSIA_H
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@ -19,7 +19,13 @@
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_mutex.h"
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#if SANITIZER_FUCHSIA
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#include <zircon/process.h>
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#include <zircon/syscalls.h>
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#include <zircon/status.h>
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#else
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#include "sanitizer_common/sanitizer_posix.h"
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#endif
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#include "xray_defs.h"
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#include "xray_utils.h"
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#include <cstddef>
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@ -33,6 +39,28 @@ namespace __xray {
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// mmap'ed memory to back the allocators.
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template <class T> T *allocate() XRAY_NEVER_INSTRUMENT {
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uptr RoundedSize = RoundUpTo(sizeof(T), GetPageSizeCached());
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#if SANITIZER_FUCHSIA
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zx_handle_t Vmo;
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zx_status_t Status = _zx_vmo_create(RoundedSize, 0, &Vmo);
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if (Status != ZX_OK) {
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if (Verbosity())
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Report("XRay Profiling: Failed to create VMO of size %zu: %s\n",
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sizeof(T), _zx_status_get_string(Status));
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return nullptr;
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}
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uintptr_t B;
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Status =
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_zx_vmar_map(_zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0,
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Vmo, 0, sizeof(T), &B);
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_zx_handle_close(Vmo);
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if (Status != ZX_OK) {
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if (Verbosity())
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Report("XRay Profiling: Failed to map VMAR of size %zu: %s\n",
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sizeof(T), _zx_status_get_string(Status));
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return nullptr;
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}
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return reinterpret_cast<T *>(B);
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#else
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uptr B = internal_mmap(NULL, RoundedSize, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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int ErrNo;
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@ -43,6 +71,7 @@ template <class T> T *allocate() XRAY_NEVER_INSTRUMENT {
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RoundedSize, B);
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return nullptr;
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}
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#endif
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return reinterpret_cast<T *>(B);
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}
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@ -50,12 +79,38 @@ template <class T> void deallocate(T *B) XRAY_NEVER_INSTRUMENT {
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if (B == nullptr)
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return;
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uptr RoundedSize = RoundUpTo(sizeof(T), GetPageSizeCached());
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#if SANITIZER_FUCHSIA
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_zx_vmar_unmap(_zx_vmar_root_self(),
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reinterpret_cast<uintptr_t>(B), RoundedSize);
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#else
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internal_munmap(B, RoundedSize);
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#endif
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}
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template <class T = unsigned char>
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T *allocateBuffer(size_t S) XRAY_NEVER_INSTRUMENT {
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uptr RoundedSize = RoundUpTo(S * sizeof(T), GetPageSizeCached());
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#if SANITIZER_FUCHSIA
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zx_handle_t Vmo;
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zx_status_t Status = _zx_vmo_create(RoundedSize, 0, &Vmo);
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if (Status != ZX_OK) {
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if (Verbosity())
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Report("XRay Profiling: Failed to create VMO of size %zu: %s\n",
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S, _zx_status_get_string(Status));
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return nullptr;
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}
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uintptr_t B;
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Status =
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_zx_vmar_map(_zx_vmar_root_self(), ZX_VM_PERM_READ | ZX_VM_PERM_WRITE, 0,
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Vmo, 0, S, &B);
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_zx_handle_close(Vmo);
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if (Status != ZX_OK) {
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if (Verbosity())
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Report("XRay Profiling: Failed to map VMAR of size %zu: %s\n",
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S, _zx_status_get_string(Status));
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return nullptr;
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}
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#else
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uptr B = internal_mmap(NULL, RoundedSize, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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int ErrNo;
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@ -66,6 +121,7 @@ T *allocateBuffer(size_t S) XRAY_NEVER_INSTRUMENT {
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RoundedSize, B);
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return nullptr;
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}
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#endif
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return reinterpret_cast<T *>(B);
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}
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@ -73,7 +129,11 @@ template <class T> void deallocateBuffer(T *B, size_t S) XRAY_NEVER_INSTRUMENT {
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if (B == nullptr)
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return;
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uptr RoundedSize = RoundUpTo(S * sizeof(T), GetPageSizeCached());
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#if SANITIZER_FUCHSIA
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_zx_vmar_unmap(_zx_vmar_root_self(), reinterpret_cast<uintptr_t>(B), RoundedSize);
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#else
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internal_munmap(B, RoundedSize);
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#endif
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}
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template <class T, class... U>
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@ -19,7 +19,9 @@
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#include <fcntl.h>
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#include <pthread.h>
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#include <sys/stat.h>
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#if SANITIZER_FREEBSD || SANITIZER_NETBSD || SANITIZER_OPENBSD || SANITIZER_MAC
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#include <sys/syscall.h>
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#endif
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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@ -16,7 +16,9 @@
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#include "sanitizer_common/sanitizer_atomic.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_libc.h"
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#if !SANITIZER_FUCHSIA
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#include "sanitizer_common/sanitizer_posix.h"
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#endif
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#include "xray_allocator.h"
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#include "xray_defs.h"
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#include <memory>
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@ -20,7 +20,6 @@
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#include <limits>
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#include <memory>
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#include <pthread.h>
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#include <sys/syscall.h>
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#include <sys/time.h>
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#include <time.h>
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#include <unistd.h>
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@ -22,6 +22,13 @@
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#include <string.h>
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#include <sys/mman.h>
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#if SANITIZER_FUCHSIA
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#include <zircon/process.h>
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#include <zircon/sanitizer.h>
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#include <zircon/status.h>
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#include <zircon/syscalls.h>
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#endif
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#include "sanitizer_common/sanitizer_addrhashmap.h"
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#include "sanitizer_common/sanitizer_common.h"
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@ -92,22 +99,48 @@ class MProtectHelper {
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public:
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explicit MProtectHelper(void *PageAlignedAddr,
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std::size_t MProtectLen) XRAY_NEVER_INSTRUMENT
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std::size_t MProtectLen,
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std::size_t PageSize) XRAY_NEVER_INSTRUMENT
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: PageAlignedAddr(PageAlignedAddr),
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MProtectLen(MProtectLen),
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MustCleanup(false) {}
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MustCleanup(false) {
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#if SANITIZER_FUCHSIA
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MProtectLen = RoundUpTo(MProtectLen, PageSize);
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#endif
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}
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int MakeWriteable() XRAY_NEVER_INSTRUMENT {
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#if SANITIZER_FUCHSIA
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auto R = __sanitizer_change_code_protection(
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reinterpret_cast<uintptr_t>(PageAlignedAddr), MProtectLen, true);
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if (R != ZX_OK) {
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Report("XRay: cannot change code protection: %s\n",
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_zx_status_get_string(R));
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return -1;
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}
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MustCleanup = true;
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return 0;
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#else
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auto R = mprotect(PageAlignedAddr, MProtectLen,
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PROT_READ | PROT_WRITE | PROT_EXEC);
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if (R != -1)
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MustCleanup = true;
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return R;
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#endif
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}
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~MProtectHelper() XRAY_NEVER_INSTRUMENT {
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if (MustCleanup) {
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#if SANITIZER_FUCHSIA
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auto R = __sanitizer_change_code_protection(
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reinterpret_cast<uintptr_t>(PageAlignedAddr), MProtectLen, false);
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if (R != ZX_OK) {
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Report("XRay: cannot change code protection: %s\n",
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_zx_status_get_string(R));
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}
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#else
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mprotect(PageAlignedAddr, MProtectLen, PROT_READ | PROT_EXEC);
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#endif
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}
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}
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};
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@ -254,7 +287,7 @@ XRayPatchingStatus controlPatching(bool Enable) XRAY_NEVER_INSTRUMENT {
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reinterpret_cast<void *>(MinSled.Address & ~(PageSize - 1));
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size_t MProtectLen =
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(MaxSled.Address - reinterpret_cast<uptr>(PageAlignedAddr)) + cSledLength;
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MProtectHelper Protector(PageAlignedAddr, MProtectLen);
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MProtectHelper Protector(PageAlignedAddr, MProtectLen, PageSize);
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if (Protector.MakeWriteable() == -1) {
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Report("Failed mprotect: %d\n", errno);
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return XRayPatchingStatus::FAILED;
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@ -319,7 +352,7 @@ XRayPatchingStatus mprotectAndPatchFunction(int32_t FuncId,
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reinterpret_cast<void *>(MinSled.Address & ~(PageSize - 1));
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size_t MProtectLen =
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(MaxSled.Address - reinterpret_cast<uptr>(PageAlignedAddr)) + cSledLength;
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MProtectHelper Protector(PageAlignedAddr, MProtectLen);
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MProtectHelper Protector(PageAlignedAddr, MProtectLen, PageSize);
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if (Protector.MakeWriteable() == -1) {
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Report("Failed mprotect: %d\n", errno);
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return XRayPatchingStatus::FAILED;
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@ -13,10 +13,32 @@
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#ifndef XRAY_EMULATE_TSC_H
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#define XRAY_EMULATE_TSC_H
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#include "sanitizer_common/sanitizer_common.h"
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namespace __xray {
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static constexpr uint64_t NanosecondsPerSecond = 1000ULL * 1000 * 1000;
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}
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#if SANITIZER_FUCHSIA
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#include <zircon/syscalls.h>
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namespace __xray {
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inline bool probeRequiredCPUFeatures() XRAY_NEVER_INSTRUMENT { return true; }
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ALWAYS_INLINE uint64_t readTSC(uint8_t &CPU) XRAY_NEVER_INSTRUMENT {
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CPU = 0;
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return _zx_ticks_get();
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}
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inline uint64_t getTSCFrequency() XRAY_NEVER_INSTRUMENT {
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return _zx_ticks_per_second();
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}
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} // namespace __xray
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#else // SANITIZER_FUCHSIA
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#if defined(__x86_64__)
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#include "xray_x86_64.inc"
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#elif defined(__powerpc64__)
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@ -64,5 +86,6 @@ inline uint64_t getTSCFrequency() XRAY_NEVER_INSTRUMENT {
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#else
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#error Target architecture is not supported.
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#endif // CPU architecture
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#endif // SANITIZER_FUCHSIA
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#endif // XRAY_EMULATE_TSC_H
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@ -27,12 +27,108 @@
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#include <unistd.h>
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#include <utility>
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#if SANITIZER_FUCHSIA
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#include "sanitizer_common/sanitizer_symbolizer_fuchsia.h"
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#include <inttypes.h>
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#include <zircon/process.h>
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#include <zircon/sanitizer.h>
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#include <zircon/status.h>
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#include <zircon/syscalls.h>
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#endif
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namespace __xray {
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void printToStdErr(const char *Buffer) XRAY_NEVER_INSTRUMENT {
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fprintf(stderr, "%s", Buffer);
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#if SANITIZER_FUCHSIA
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constexpr const char* ProfileSinkName = "llvm-xray";
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LogWriter::~LogWriter() {
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_zx_handle_close(Vmo);
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}
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void LogWriter::WriteAll(const char *Begin, const char *End) XRAY_NEVER_INSTRUMENT {
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if (Begin == End)
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return;
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auto TotalBytes = std::distance(Begin, End);
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const size_t PageSize = flags()->xray_page_size_override > 0
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? flags()->xray_page_size_override
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: GetPageSizeCached();
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if (RoundUpTo(Offset, PageSize) != RoundUpTo(Offset + TotalBytes, PageSize)) {
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// Resize the VMO to ensure there's sufficient space for the data.
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zx_status_t Status = _zx_vmo_set_size(Vmo, Offset + TotalBytes);
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if (Status != ZX_OK) {
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Report("Failed to resize VMO: %s\n", _zx_status_get_string(Status));
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return;
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}
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}
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// Write the data into VMO.
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zx_status_t Status = _zx_vmo_write(Vmo, Begin, Offset, TotalBytes);
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if (Status != ZX_OK) {
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Report("Failed to write: %s\n", _zx_status_get_string(Status));
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return;
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}
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Offset += TotalBytes;
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}
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void LogWriter::Flush() XRAY_NEVER_INSTRUMENT {
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// Nothing to do here since WriteAll writes directly into the VMO.
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}
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LogWriter *LogWriter::Open() XRAY_NEVER_INSTRUMENT {
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// Create VMO to hold the profile data.
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zx_handle_t Vmo;
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zx_status_t Status = _zx_vmo_create(0, 0, &Vmo);
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if (Status != ZX_OK) {
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Report("XRay: cannot create VMO: %s\n", _zx_status_get_string(Status));
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return nullptr;
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}
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// Get the KOID of the current process to use in the VMO name.
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zx_info_handle_basic_t Info;
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Status = _zx_object_get_info(_zx_process_self(), ZX_INFO_HANDLE_BASIC, &Info,
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sizeof(Info), NULL, NULL);
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if (Status != ZX_OK) {
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Report("XRay: cannot get basic info about current process handle: %s\n",
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_zx_status_get_string(Status));
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return nullptr;
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}
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// Give the VMO a name including our process KOID so it's easy to spot.
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char VmoName[ZX_MAX_NAME_LEN];
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internal_snprintf(VmoName, sizeof(VmoName), "%s.%zu", ProfileSinkName,
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Info.koid);
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_zx_object_set_property(Vmo, ZX_PROP_NAME, VmoName, strlen(VmoName));
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// Duplicate the handle since __sanitizer_publish_data consumes it and
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// LogWriter needs to hold onto it.
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zx_handle_t Handle;
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Status =_zx_handle_duplicate(Vmo, ZX_RIGHT_SAME_RIGHTS, &Handle);
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if (Status != ZX_OK) {
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Report("XRay: cannot duplicate VMO handle: %s\n",
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_zx_status_get_string(Status));
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return nullptr;
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}
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// Publish the VMO that receives the logging. Note the VMO's contents can
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// grow and change after publication. The contents won't be read out until
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// after the process exits.
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__sanitizer_publish_data(ProfileSinkName, Handle);
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// Use the dumpfile symbolizer markup element to write the name of the VMO.
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Report("XRay: " FORMAT_DUMPFILE "\n", ProfileSinkName, VmoName);
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LogWriter *LW = reinterpret_cast<LogWriter *>(InternalAlloc(sizeof(LogWriter)));
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new (LW) LogWriter(Vmo);
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return LW;
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}
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void LogWriter::Close(LogWriter *LW) {
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LW->~LogWriter();
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InternalFree(LW);
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}
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#else // SANITIZER_FUCHSIA
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LogWriter::~LogWriter() {
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internal_close(Fd);
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}
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@ -95,5 +191,6 @@ void LogWriter::Close(LogWriter *LW) {
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LW->~LogWriter();
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deallocate(LW);
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}
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#endif // SANITIZER_FUCHSIA
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} // namespace __xray
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@ -20,11 +20,20 @@
|
|||
#include <sys/types.h>
|
||||
#include <utility>
|
||||
|
||||
#include "sanitizer_common/sanitizer_common.h"
|
||||
#if SANITIZER_FUCHSIA
|
||||
#include <zircon/types.h>
|
||||
#endif
|
||||
|
||||
namespace __xray {
|
||||
|
||||
class LogWriter {
|
||||
public:
|
||||
#if SANITIZER_FUCHSIA
|
||||
LogWriter(zx_handle_t Vmo) : Vmo(Vmo) {}
|
||||
#else
|
||||
explicit LogWriter(int Fd) : Fd(Fd) {}
|
||||
#endif
|
||||
~LogWriter();
|
||||
|
||||
// Write a character range into a log.
|
||||
|
@ -38,12 +47,14 @@ public:
|
|||
static void Close(LogWriter *LogWriter);
|
||||
|
||||
private:
|
||||
#if SANITIZER_FUCHSIA
|
||||
zx_handle_t Vmo = ZX_HANDLE_INVALID;
|
||||
uint64_t Offset = 0;
|
||||
#else
|
||||
int Fd = -1;
|
||||
#endif
|
||||
};
|
||||
|
||||
// Default implementation of the reporting interface for sanitizer errors.
|
||||
void printToStdErr(const char *Buffer);
|
||||
|
||||
constexpr size_t gcd(size_t a, size_t b) {
|
||||
return (b == 0) ? a : gcd(b, a % b);
|
||||
}
|
||||
|
|
|
@ -1,6 +1,8 @@
|
|||
#include "cpuid.h"
|
||||
#include "sanitizer_common/sanitizer_common.h"
|
||||
#if !SANITIZER_FUCHSIA
|
||||
#include "sanitizer_common/sanitizer_posix.h"
|
||||
#endif
|
||||
#include "xray_defs.h"
|
||||
#include "xray_interface_internal.h"
|
||||
|
||||
|
@ -11,6 +13,8 @@
|
|||
#include <machine/cpu.h>
|
||||
#endif
|
||||
#include <sys/sysctl.h>
|
||||
#elif SANITIZER_FUCHSIA
|
||||
#include <zircon/syscalls.h>
|
||||
#endif
|
||||
|
||||
#include <atomic>
|
||||
|
@ -104,7 +108,7 @@ uint64_t getTSCFrequency() XRAY_NEVER_INSTRUMENT {
|
|||
|
||||
return 0;
|
||||
}
|
||||
#else
|
||||
#elif !SANITIZER_FUCHSIA
|
||||
uint64_t getTSCFrequency() XRAY_NEVER_INSTRUMENT {
|
||||
/* Not supported */
|
||||
return 0;
|
||||
|
@ -321,6 +325,7 @@ bool patchTypedEvent(const bool Enable, const uint32_t FuncId,
|
|||
return false;
|
||||
}
|
||||
|
||||
#if !SANITIZER_FUCHSIA
|
||||
// We determine whether the CPU we're running on has the correct features we
|
||||
// need. In x86_64 this will be rdtscp support.
|
||||
bool probeRequiredCPUFeatures() XRAY_NEVER_INSTRUMENT {
|
||||
|
@ -343,5 +348,6 @@ bool probeRequiredCPUFeatures() XRAY_NEVER_INSTRUMENT {
|
|||
}
|
||||
return true;
|
||||
}
|
||||
#endif
|
||||
|
||||
} // namespace __xray
|
||||
|
|
Loading…
Reference in New Issue