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Changed the stack trace stuff so that it doesn't perform memory

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allocations or copy strings.

--HG--
extra : convert_revision : svn%3Afdd8eb12-d10e-0410-9acb-85c331704f74/trunk%402242
This commit is contained in:
Davis King 2008-05-15 20:56:04 +00:00
parent 2c32d2d242
commit 818bc6adf6
1 changed files with 23 additions and 14 deletions
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37
dlib/stack_trace.cpp
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@ -10,16 +10,27 @@
#include "stack_trace.h"
#include "threads.h"
#include "stack.h"
#include "memory_manager.h"
namespace dlib
{
// ----------------------------------------------------------------------------------------
thread_specific_data<stack<std::string>::kernel_1a>& get_dlib_stack_trace_stack()
namespace
{
static thread_specific_data<stack<std::string>::kernel_1a> a;
return a;
struct stack_tracer_data
{
const char* funct_name;
const char* file_name;
int line_number;
};
thread_specific_data<stack<stack_tracer_data,memory_manager<char>::kernel_2a>::kernel_1a>& get_dlib_stack_trace_stack()
{
static thread_specific_data<stack<stack_tracer_data,memory_manager<char>::kernel_2a>::kernel_1a> a;
return a;
}
}
// ----------------------------------------------------------------------------------------
@ -31,16 +42,13 @@ namespace dlib
const int line_number
)
{
std::ostringstream sout;
// if the function name isn't really long then put this all on a single line
if (std::strlen(funct_name) < 40)
sout << file_name << ":" << line_number << ": " << funct_name;
else
sout << file_name << ":" << line_number << "\n" << funct_name;
stack_tracer_data data;
data.funct_name = funct_name;
data.file_name = file_name;
data.line_number = line_number;
// pop the string onto the function stack trace
std::string temp(sout.str());
get_dlib_stack_trace_stack().data().push(temp);
// pop the info onto the function stack trace
get_dlib_stack_trace_stack().data().push(data);
}
// ----------------------------------------------------------------------------------------
@ -48,7 +56,7 @@ namespace dlib
stack_tracer::
~stack_tracer()
{
std::string temp;
stack_tracer_data temp;
get_dlib_stack_trace_stack().data().pop(temp);
}
@ -60,7 +68,8 @@ namespace dlib
get_dlib_stack_trace_stack().data().reset();
while (get_dlib_stack_trace_stack().data().move_next())
{
sout << get_dlib_stack_trace_stack().data().element() << "\n";
stack_tracer_data data = get_dlib_stack_trace_stack().data().element();
sout << data.file_name << ":" << data.line_number << "\n " << data.funct_name;
}
return sout.str();
}