fix: breakpad use miniz

third_party/tracy/public/client/TracyRingBuffer.hpp

@@ -0,0 +1,141 @@
+#include <atomic>
+#include <assert.h>
+#include <errno.h>
+#include <linux/perf_event.h>
+#include <stdint.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <unistd.h>
+
+#include "TracyDebug.hpp"
+
+namespace tracy
+{
+
+class RingBuffer
+{
+public:
+    RingBuffer( unsigned int size, int fd, int id, int cpu = -1 )
+        : m_size( size )
+        , m_id( id )
+        , m_cpu( cpu )
+        , m_fd( fd )
+    {
+        const auto pageSize = uint32_t( getpagesize() );
+        assert( size >= pageSize );
+        assert( __builtin_popcount( size ) == 1 );
+        m_mapSize = size + pageSize;
+        auto mapAddr = mmap( nullptr, m_mapSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
+        if( mapAddr == MAP_FAILED )
+        {
+            TracyDebug( "mmap failed: errno %i (%s)\n", errno, strerror( errno ) );
+            m_fd = 0;
+            m_metadata = nullptr;
+            close( fd );
+            return;
+        }
+        m_metadata = (perf_event_mmap_page*)mapAddr;
+        assert( m_metadata->data_offset == pageSize );
+        m_buffer = ((char*)mapAddr) + pageSize;
+        m_tail = m_metadata->data_tail;
+    }
+
+    ~RingBuffer()
+    {
+        if( m_metadata ) munmap( m_metadata, m_mapSize );
+        if( m_fd ) close( m_fd );
+    }
+
+    RingBuffer( const RingBuffer& ) = delete;
+    RingBuffer& operator=( const RingBuffer& ) = delete;
+
+    RingBuffer( RingBuffer&& other )
+    {
+        memcpy( (char*)&other, (char*)this, sizeof( RingBuffer ) );
+        m_metadata = nullptr;
+        m_fd = 0;
+    }
+
+    RingBuffer& operator=( RingBuffer&& other )
+    {
+        memcpy( (char*)&other, (char*)this, sizeof( RingBuffer ) );
+        m_metadata = nullptr;
+        m_fd = 0;
+        return *this;
+    }
+
+    bool IsValid() const { return m_metadata != nullptr; }
+    int GetId() const { return m_id; }
+    int GetCpu() const { return m_cpu; }
+
+    void Enable()
+    {
+        ioctl( m_fd, PERF_EVENT_IOC_ENABLE, 0 );
+    }
+
+    void Read( void* dst, uint64_t offset, uint64_t cnt )
+    {
+        const auto size = m_size;
+        auto src = ( m_tail + offset ) % size;
+        if( src + cnt <= size )
+        {
+            memcpy( dst, m_buffer + src, cnt );
+        }
+        else
+        {
+            const auto s0 = size - src;
+            const auto buf = m_buffer;
+            memcpy( dst, buf + src, s0 );
+            memcpy( (char*)dst + s0, buf, cnt - s0 );
+        }
+    }
+
+    void Advance( uint64_t cnt )
+    {
+        m_tail += cnt;
+        StoreTail();
+    }
+
+    bool CheckTscCaps() const
+    {
+        return m_metadata->cap_user_time_zero;
+    }
+
+    int64_t ConvertTimeToTsc( int64_t timestamp ) const
+    {
+        if( !m_metadata->cap_user_time_zero ) return 0;
+        const auto time = timestamp - m_metadata->time_zero;
+        const auto quot = time / m_metadata->time_mult;
+        const auto rem = time % m_metadata->time_mult;
+        return ( quot << m_metadata->time_shift ) + ( rem << m_metadata->time_shift ) / m_metadata->time_mult;
+    }
+
+    uint64_t LoadHead() const
+    {
+        return std::atomic_load_explicit( (const volatile std::atomic<uint64_t>*)&m_metadata->data_head, std::memory_order_acquire );
+    }
+
+    uint64_t GetTail() const
+    {
+        return m_tail;
+    }
+
+private:
+    void StoreTail()
+    {
+        std::atomic_store_explicit( (volatile std::atomic<uint64_t>*)&m_metadata->data_tail, m_tail, std::memory_order_release );
+    }
+
+    unsigned int m_size;
+    uint64_t m_tail;
+    char* m_buffer;
+    int m_id;
+    int m_cpu;
+    perf_event_mmap_page* m_metadata;
+
+    size_t m_mapSize;
+    int m_fd;
+};
+
+}