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package org.eclipse.cdt.utils;
/*
* (c) Copyright QNX Software Systems Ltd. 2002.
* All Rights Reserved.
*/
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import org.eclipse.cdt.utils.spawner.ProcessFactory;
public class Addr2line {
private Process addr2line;
private BufferedReader stdout;
private BufferedWriter stdin;
private String lastaddr, lastsymbol, lastline;
public Addr2line(String command, String file) throws IOException {
String[] args = {command, "-C", "-f", "-e", file};
addr2line = ProcessFactory.getFactory().exec(args);
stdin = new BufferedWriter(new OutputStreamWriter(addr2line.getOutputStream()));
stdout = new BufferedReader(new InputStreamReader(addr2line.getInputStream()));
}
public Addr2line(String file) throws IOException {
this("addr2line", file);
}
private void getOutput(String address) throws IOException {
if ( address.equals(lastaddr) == false ) {
stdin.write(address + "\n");
stdin.flush();
lastsymbol = stdout.readLine();
lastline = stdout.readLine();
lastaddr = address;
}
}
public String getLine(long address) throws IOException {
getOutput(Integer.toHexString((int)address));
return lastline;
}
public String getFunction(long address) throws IOException {
getOutput(Integer.toHexString((int)address));
return lastsymbol;
}
/**
* The format of the output:
* addr2line -C -f -e hello
* 08048442
* main
* hello.c:39
*/
public String getFileName(long address) throws IOException {
String filename = null;
String line = getLine(address);
int index1, index2;
if (line != null && (index1 = line.lastIndexOf(':')) != -1) {
// we do this because addr2line on win produces
// <cygdrive/pathtoexc/C:/pathtofile:##>
index2 = line.indexOf(':');
if (index1 == index2) {
index2 = 0;
} else {
index2--;
}
filename = line.substring(index2, index1);
}
return filename;
}
/**
* The format of the output:
* addr2line -C -f -e hello
* 08048442
* main
* hello.c:39
*/
public int getLineNumber(long address) throws IOException {
// We try to get the nearest match
// since the symbol may not exactly align with debug info.
// In C line number 0 is invalid, line starts at 1 for file, we use
// this for validation.
for (int i = 0; i <= 20; i += 4, address += i) {
String line = getLine(address);
if (line != null) {
int colon = line.lastIndexOf(':');
String number = line.substring(colon + 1);
if (!number.startsWith("0")) {
return Integer.parseInt(number);
}
}
}
return -1;
}
public void dispose() {
try {
stdout.close();
stdin.close();
addr2line.getErrorStream().close();
} catch (IOException e) {
}
addr2line.destroy();
}
}
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