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https://github.com/wolfpld/tracy.git
synced 2024-11-26 07:54:36 +00:00
Inject tracy_systrace into filesystem and use instead of cat.
Statistics for a one-minute trace: Capture tool | Running time | Running regions ---------------+--------------+----------------- cat | 25.11 s | 392,300 tracy_systrace | 10.41 s | 12,249
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@ -322,6 +322,7 @@ void SysTraceSendExternalName( uint64_t thread )
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# include <sys/types.h>
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# include <sys/stat.h>
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# include <sys/wait.h>
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# include <fcntl.h>
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# include <inttypes.h>
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# include <limits>
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@ -333,6 +334,10 @@ void SysTraceSendExternalName( uint64_t thread )
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# include "TracyProfiler.hpp"
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# ifdef __ANDROID__
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# include "TracySysTracePayload.hpp"
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# endif
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namespace tracy
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{
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@ -381,6 +386,43 @@ static bool TraceWrite( const char* path, size_t psz, const char* val, size_t vs
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}
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#endif
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#ifdef __ANDROID__
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void SysTraceInjectPayload()
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{
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int pipefd[2];
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if( pipe( pipefd ) == 0 )
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{
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const auto pid = fork();
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if( pid == 0 )
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{
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// child
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close( pipefd[1] );
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if( dup2( pipefd[0], STDIN_FILENO ) >= 0 )
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{
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close( pipefd[0] );
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execlp( "su", "su", "-c", "cat > /data/tracy_systrace", (char*)nullptr );
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exit( 1 );
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}
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}
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else if( pid > 0 )
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{
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// parent
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close( pipefd[0] );
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#ifdef __aarch64__
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write( pipefd[1], tracy_systrace_aarch64_data, tracy_systrace_aarch64_size );
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#else
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write( pipefd[1], tracy_systrace_armv7_data, tracy_systrace_armv7_size );
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#endif
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close( pipefd[1] );
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waitpid( pid, nullptr, 0 );
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system( "su -c 'chmod 700 /data/tracy_systrace'" );
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}
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}
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}
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#endif
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bool SysTraceStart()
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{
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if( !TraceWrite( TracingOn, sizeof( TracingOn ), "0", 2 ) ) return false;
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@ -395,6 +437,11 @@ bool SysTraceStart()
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#endif
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if( !TraceWrite( SchedSwitch, sizeof( SchedSwitch ), "1", 2 ) ) return false;
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if( !TraceWrite( SchedWakeup, sizeof( SchedWakeup ), "1", 2 ) ) return false;
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#if defined __ANDROID__ && ( defined __aarch64__ || defined __ARM_ARCH )
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SysTraceInjectPayload();
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#endif
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if( !TraceWrite( TracingOn, sizeof( TracingOn ), "1", 2 ) ) return false;
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return true;
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@ -666,6 +713,9 @@ void SysTraceWorker( void* ptr )
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if( dup2( pipefd[1], STDOUT_FILENO ) >= 0 )
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{
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close( pipefd[1] );
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#if defined __ANDROID__ && ( defined __aarch64__ || defined __ARM_ARCH )
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execlp( "su", "su", "-c", "/data/tracy_systrace", (char*)nullptr );
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#endif
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execlp( "su", "su", "-c", "cat /sys/kernel/debug/tracing/trace_pipe", (char*)nullptr );
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exit( 1 );
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}
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