breakpoints

问题 I'm writing an Android app in Eclipse, and displaying some text on screen using a TextView . A different thread sometimes changes the text of this view, with the following code: runOnUiThread(new Runnable() { @Override public void run() { view.setText(newLyric); } }); I wanted to debug the setText line to check that the correct String was being passed in (as for some text, it was not being word-wrapped to fit the screen, and for other text it was, but that's a different issue). When I put a

问题 I'm writing an Android app in Eclipse, and displaying some text on screen using a TextView . A different thread sometimes changes the text of this view, with the following code: runOnUiThread(new Runnable() { @Override public void run() { view.setText(newLyric); } }); I wanted to debug the setText line to check that the correct String was being passed in (as for some text, it was not being word-wrapped to fit the screen, and for other text it was, but that's a different issue). When I put a

问题 I know that software breakpoints in an executable file can work through replacing some assembler instruction at the desired place with another one, which cause interrupt. So debugger can stop execution exactly at this place and replace this instruction with original one and ask user about what to do the next or call some commands and etc. But code of such executable file is not used by another programs and has only one copy in memory. How can software breakpoints work with a shared libraries?

问题 Does anyone know what the limit is on the maximum number of breakpoints that can be set with Google Chrome's Web Inspector? Thanks. 回答1: The number of breakpoints is only limited by your hardware resources (memory for storing them and CPU for quickly handling this lot of DOM elements.) 回答2: As far as I know there is no explicit limit for the number of breakpoints. However you should expect that some algorithms are not well optimized for a large number of breakpoints, e.g. some internal

问题 Does anyone know what the limit is on the maximum number of breakpoints that can be set with Google Chrome's Web Inspector? Thanks. 回答1: The number of breakpoints is only limited by your hardware resources (memory for storing them and CPU for quickly handling this lot of DOM elements.) 回答2: As far as I know there is no explicit limit for the number of breakpoints. However you should expect that some algorithms are not well optimized for a large number of breakpoints, e.g. some internal

问题 I would like to set a conditional breakpoint with lldb. This is usually done using -c option : breakpoint set -f myFile.cpp -l 123 -c 'a==3' However, in my case I want to test if a std::string object is equal to a certain string value but doing this breakpoint set -f myFile.cpp -l 123 -c 'a=="hello"' does not work… Lldb does not complain (while gdb would return an error) but it ignores the condition string upon reaching the breakpoint and breaks too early… This question is similar to this one

问题 Trying to find how to execute ipdb (or pdb) commands such as disable . Calling the h command on disable says disable bpnumber [bpnumber ...] Disables the breakpoints given as a space separated list of bp numbers. So how whould I get those bp numbers? was looking through the list of commands and couldn't get any to display the bp numbers [EDIT] The break , b and info breakpoints commands don't do anything, although in my module i clearly have 1 breakpoint set like this import pdb; pdb.set

问题 I am trying set breakpoints in template functions in C++ via GDB I tried three possible approaches. break fileName:functionName => works for non-templated functions (specific to one function) rbreak fileName:. => breakpoints at all functions in a given file, but it does not seem to work for template functions break fileName:lineNumber => works for both non-templated and templated functions but problem here for me is I have to modify this linenumber everytime. A overall objective is am using a

问题 As a workaround with x86 instructions, I used an opcode looks like .byte 0xf1, 0xc1 and tried to execute that inside gdb. the disassembly of that line shows f1 icebp So, when first byte which is F1 is fetched it is recognized as an instruction called icebp . This is known to be an undocumented instruction. The only thing I found in the SDM, is a footnote in INT sections saying The mnemonic ICEBP has also been used for the instruction with opcode F1 Continuing with gdb, it says Cannot access

问题 I'm unable to create conditional breakpoint in GDB using strcmp: break x if strcmp(str.c_str(), "foo") == 0 Why you ask? Because: print strcmp("hello", "hello") Yield's (int (*)(const char *, const char *)) 0x7ffff76ffe70 <__strcmp_sse2_unaligned> Even when casting it to an integer: print (int)strcmp("hello", "hello") It returns some nonsensical value like -143655312 Here's a less graceful way to "solve" my problem. I can define a function in my own code: int mystrcmp(const char *str1, const