/usr/include/hphp/util/ringbuffer.h is in hhvm-dev 3.11.1+dfsg-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 | /*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-2015 Facebook, Inc. (http://www.facebook.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#ifndef incl_HPHP_RINGBUFFER_H_
#define incl_HPHP_RINGBUFFER_H_
#include <cstdlib>
#include <cstdarg>
#include <cinttypes>
#include <atomic>
#include "hphp/util/portability.h"
namespace HPHP {
namespace Trace {
#define RBTYPES \
RBTYPE(Uninit) \
RBTYPE(Msg) \
RBTYPE(SideExit) \
RBTYPE(EnterTC) \
RBTYPE(ResumeTC) \
RBTYPE(TraceletBody) \
RBTYPE(TraceletGuards) \
RBTYPE(FuncEntry) \
RBTYPE(FuncExit) \
RBTYPE(FuncPrologue) \
RBTYPE(BytecodeStart) \
RBTYPE(ServiceReq) \
RBTYPE(DispatchBB) \
RBTYPE(InterpOne)
enum RingBufferType : uint8_t {
#define RBTYPE(x) RBType ## x,
RBTYPES
#undef RBTYPE
};
/*
* Thread-shared, binary ringbuffer. Includes thread-private ASCII ringbuffers
* by reference. Beware that very old ASCII entries can be corrupt; still, this
* is better than nothing.
*/
struct RingBufferEntry {
// 0 - 15
union {
struct {
uint64_t m_sk;
uint64_t m_data;
};
struct {
const char* m_msg;
uint32_t m_len;
uint32_t m_truncatedRip; // Bottom 32 bits of rip from the caller, which
// is usually enough in practice.
};
};
// 16-23
uint32_t m_threadId;
uint32_t m_seq; // sequence number
// 24 - 31
RingBufferType m_type;
};
static_assert(sizeof(RingBufferEntry) == 32,
"RingBufferEntry expected to be 32 bytes");
constexpr unsigned kMaxRBEntries = (1 << 20); // Must exceed number of threads
extern RingBufferEntry* g_ring_ptr;
extern std::atomic<int> g_ringIdx;
const char* ringbufferName(RingBufferType t);
void vtraceRingbuffer(ATTRIBUTE_PRINTF_STRING const char* fmt, va_list ap)
ATTRIBUTE_PRINTF(1,0);
void ringbufferMsg(const char* msg, size_t msgLen,
RingBufferType t = RBTypeMsg);
void ringbufferEntry(RingBufferType t, uint64_t sk, uint64_t data);
void ringbufferEntryRip(RingBufferType t, uint64_t sk);
}
}
#endif
|