step |
| Continue running your program until control reaches a different |
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| source line, then stop it and return control to GDB. This |
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| command is abbreviated s. |
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|
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| WARNING! If you use the step command while control is |
| ||
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| within a function that was compiled without debugging |
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| information, execution proceeds until control reaches a function |
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| that does have debugging information. Likewise, it will not step |
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| into a function which is compiled without debugging |
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| information. To step through functions without debugging |
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| information, use the stepi command, described below. |
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|
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| The step command only stops at the first instruction of a source |
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| line. This prevents the multiple stops that could otherwise occur |
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| in switch statements, for loops, and so on. step continues to |
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| stop if a function that has debugging information is called within |
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| the line. In other words, step steps inside any functions called |
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| within the line. |
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| Also, the step command only enters a function if there is line |
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| number information for the function. Otherwise it acts like the |
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| next command. This avoids problems when using cc |
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| on MIPS machines. Previously, step entered subroutines if there |
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| was any debugging information about the routine. |
step count |
| Continue running as in step, but do so count times. If a |
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| breakpoint is reached, or a signal not related to stepping occurs |
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| before count steps, stepping stops right away. |
next [count] |
| Continue to the next source line in the current (innermost) stack |
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| frame. This is similar to step, but function calls that appear |
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| within the line of code are executed without stopping. Execution |
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| stops when control reaches a different line of code at the original |
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| stack level that was executing when you gave the next |
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| command. This command is abbreviated n. |
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| An argument count is a repeat count, as for step. |
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| The next command only stops at the first instruction of a source |
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| line. This prevents multiple stops that could otherwise occur in |
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| switch statements, for loops, and so on. |
finish |
| Continue running until just after function in the selected stack |
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| frame returns. Print the returned value (if any). |
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| Contrast this with the return command (see “Returning from |
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5.2 Continuing and stepping 65