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Added --trace-read=<property> and --trace-write=<property> options.

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These will log trace messages whenever a specific property value is
read or written through the property manager.  They do not cause
FlightGear to poll bound values, so if a class variable that is bound
is changed directly, no trace message will be displayed.

These options are also useful in conjunction with a debugger.
--trace-read will cause the private SimGear SGPropertyNode::trace_read
method to be invoked, and --trace-write will cause the private SimGear
SGPropertyNode::trace_write method to be invoked; in a debugger
session, a user can set breakpoints on these methods then get a
backtrace to see what specific points in the code are reading or
writing properties.
This commit is contained in:
david 2001-12-12 03:49:48 +00:00
parent 2f66d01298
commit 18b1b4f7af
1 changed files with 10 additions and 2 deletions
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12
src/Main/options.cxx
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@ -839,9 +839,17 @@ parse_option (const string& arg)
fgSetString(name.c_str(), value);
// SG_LOG(SG_GENERAL, SG_INFO, "Setting default value of property "
// << name << " to \"" << value << '"');
// $$$ begin - added VS Renganathan, 14 Oct 2K
// for multi-window outside window imagery
} else if ( arg.find("--trace-read=") == 0) {
string name = arg.substr(13);
SG_LOG(SG_GENERAL, SG_INFO, "Tracing reads for property " << name);
fgGetNode(name, true)->setAttribute(SGPropertyNode::TRACE_READ, true);
} else if ( arg.find("--trace-write=") == 0) {
string name = arg.substr(14);
SG_LOG(SG_GENERAL, SG_INFO, "Tracing writes for property " << name);
fgGetNode(name, true)->setAttribute(SGPropertyNode::TRACE_WRITE, true);
} else if ( arg.find( "--view-offset=" ) == 0 ) {
// $$$ begin - added VS Renganathan, 14 Oct 2K
// for multi-window outside window imagery
string woffset = arg.substr( 14 );
double default_view_offset = 0.0;
if ( woffset == "LEFT" ) {