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Added "in_context" debugger command. It takes a thread ID and a command

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line and executes the command line in the context of the specified
thread. E.g. "in_context <thread> db <addr>" allows to read memory from
a team that is not active ATM.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27156 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Ingo Weinhold 2008-08-22 15:42:27 +00:00
parent 0deddbe36c
commit 757f253a2d
1 changed files with 61 additions and 0 deletions
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61
src/system/kernel/arch/x86/arch_debug.cpp
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@ -551,6 +551,62 @@ is_calling(struct thread *thread, addr_t eip, const char *pattern,
}
static int
cmd_in_context(int argc, char** argv)
{
if (argc != 2) {
print_debugger_command_usage(argv[0]);
return 0;
}
// get the thread ID
const char* commandLine = argv[1];
char threadIDString[16];
if (parse_next_debug_command_argument(&commandLine, threadIDString,
sizeof(threadIDString)) != B_OK) {
kprintf("Failed to parse thread ID.\n");
return 0;
}
if (commandLine == NULL) {
print_debugger_command_usage(argv[0]);
return 0;
}
uint64 threadID;
if (!evaluate_debug_expression(threadIDString, &threadID, false))
return 0;
// get the thread
struct thread* thread = thread_get_thread_struct_locked(threadID);
if (thread == NULL) {
kprintf("Could not find thread with ID \"%s\".\n", threadIDString);
return 0;
}
// switch the page directory, if necessary
addr_t oldPageDirectory = 0;
if (thread != thread_get_current_thread()) {
addr_t newPageDirectory = (addr_t)x86_next_page_directory(
thread_get_current_thread(), thread);
if (newPageDirectory != 0) {
read_cr3(oldPageDirectory);
write_cr3(newPageDirectory);
}
}
// execute the command
evaluate_debug_command(commandLine);
// reset the page directory
if (oldPageDirectory)
write_cr3(oldPageDirectory);
return 0;
}
// #pragma mark -
@ -656,6 +712,11 @@ arch_debug_init(kernel_args *args)
add_debugger_command("iframe", &dump_iframes,
"Dump iframes for the specified thread");
add_debugger_command("call", &show_call, "Show call with arguments");
add_debugger_command_etc("in_context", &cmd_in_context,
"Executes a command in the context of a given thread",
"<thread ID> <command> ...\n"
"Executes a command in the context of a given thread.\n",
B_KDEBUG_DONT_PARSE_ARGUMENTS);
return B_NO_ERROR;
}