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Kernel tracing on android.

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This commit is contained in:
Bartosz Taudul 2019-08-20 15:49:40 +02:00
parent e427d67347
commit 247acd03ee
1 changed files with 44 additions and 8 deletions
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52
client/TracySysTrace.cpp
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@ -506,15 +506,8 @@ ssize_t getline(char **buf, size_t *bufsiz, FILE *fp)
} }
#endif #endif
void SysTraceWorker( void* ptr ) static void ProcessTraceLines( FILE* f )
{ {
char tmp[256];
memcpy( tmp, BasePath, sizeof( BasePath ) - 1 );
memcpy( tmp + sizeof( BasePath ) - 1, TracePipe, sizeof( TracePipe ) );
FILE* f = fopen( tmp, "rb" );
if( !f ) return;
size_t lsz = 1024; size_t lsz = 1024;
auto line = (char*)malloc( lsz ); auto line = (char*)malloc( lsz );
@ -600,8 +593,51 @@ void SysTraceWorker( void* ptr )
} }
free( line ); free( line );
}
#ifdef __ANDROID__
void SysTraceWorker( void* ptr )
{
int pipefd[2];
if( pipe( pipefd ) == 0 )
{
const auto pid = fork();
if( pid == 0 )
{
// child
close( pipefd[0] );
dup2( pipefd[1], STDERR_FILENO );
if( dup2( pipefd[1], STDOUT_FILENO ) >= 0 )
{
close( pipefd[1] );
execlp( "su", "su", "-c", "cat /sys/kernel/debug/tracing/trace_pipe", (char*)nullptr );
exit( 1 );
}
}
else if( pid > 0 )
{
// parent
close( pipefd[1] );
FILE* f = fdopen( pipefd[0], "rb" );
if( !f ) return;
ProcessTraceLines( f );
fclose( f );
}
}
}
#else
void SysTraceWorker( void* ptr )
{
char tmp[256];
memcpy( tmp, BasePath, sizeof( BasePath ) - 1 );
memcpy( tmp + sizeof( BasePath ) - 1, TracePipe, sizeof( TracePipe ) );
FILE* f = fopen( tmp, "rb" );
if( !f ) return;
ProcessTraceLines( f );
fclose( f ); fclose( f );
} }
#endif
void SysTraceSendExternalName( uint64_t thread ) void SysTraceSendExternalName( uint64_t thread )
{ {