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2026-07-18 14:31:15 +02:00
commit a04f0dc262
3343 changed files with 1140208 additions and 0 deletions
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+#ifdef __linux__
+
+#include <algorithm>
+#include <assert.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <unistd.h>
+
+#include "TracyDebug.hpp"
+#include "TracyElf.hpp"
+#include "TracyKCore.hpp"
+#include "../common/TracyAlloc.hpp"
+
+
+namespace tracy
+{
+
+KCore::KCore()
+    : m_offsets( 16 )
+{
+    m_fd = open( "/proc/kcore", O_RDONLY );
+    if( m_fd == -1 ) return;
+
+    elf_ehdr ehdr;
+    if( read( m_fd, &ehdr, sizeof( ehdr ) ) != sizeof( ehdr ) ) goto err;
+
+    assert( ehdr.e_phentsize == sizeof( elf_phdr ) );
+
+    for( elf_half i=0; i<ehdr.e_phnum; i++ )
+    {
+        elf_phdr phdr;
+        if( lseek( m_fd, ehdr.e_phoff + i * ehdr.e_phentsize, SEEK_SET ) == -1 ) goto err;
+        if( read( m_fd, &phdr, sizeof( phdr ) ) != sizeof( phdr ) ) goto err;
+        if( phdr.p_type != 1 ) continue;
+
+        auto ptr = m_offsets.push_next();
+        ptr->start = phdr.p_vaddr;
+        ptr->size = phdr.p_memsz;
+        ptr->offset = phdr.p_offset;
+    }
+
+    std::sort( m_offsets.begin(), m_offsets.end(), []( const Offset& lhs, const Offset& rhs ) { return lhs.start < rhs.start; } );
+    TracyDebug( "KCore: %zu segments found", m_offsets.size() );
+    return;
+
+err:
+    close( m_fd );
+    m_fd = -1;
+}
+
+KCore::~KCore()
+{
+    if( m_fd != -1 ) close( m_fd );
+}
+
+void* KCore::Retrieve( uint64_t addr, uint64_t size ) const
+{
+    if( m_fd == -1 ) return nullptr;
+    auto it = std::lower_bound( m_offsets.begin(), m_offsets.end(), addr, []( const Offset& lhs, uint64_t rhs ) { return lhs.start + lhs.size < rhs; } );
+    if( it == m_offsets.end() ) return nullptr;
+    if( addr + size > it->start + it->size ) return nullptr;
+    if( lseek( m_fd, it->offset + addr - it->start, SEEK_SET ) == -1 ) return nullptr;
+    auto ptr = tracy_malloc( size );
+    if( read( m_fd, ptr, size ) != ssize_t( size ) )
+    {
+        tracy_free( ptr );
+        return nullptr;
+    }
+    return ptr;
+}
+
+}
+
+#endif